./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e9065224c0b163ad014fc0aee4009feab43ed37ef70e06d8d8f3b14d045f755a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:55:11,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:55:11,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:55:11,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:55:11,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:55:11,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:55:11,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:55:11,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:55:11,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:55:11,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:55:11,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:55:11,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:55:11,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:55:11,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:55:11,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:55:11,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:55:11,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:55:11,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:55:11,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:55:11,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:55:11,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:55:11,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:55:11,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:55:11,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:55:11,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:55:11,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:55:11,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:55:11,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:55:11,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:55:11,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:55:11,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:55:11,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:55:11,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:55:11,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:55:11,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:55:11,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:55:11,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:55:11,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:55:11,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:55:11,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:55:11,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:55:11,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:55:11,851 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:55:11,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:55:11,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:55:11,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:55:11,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:55:11,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:55:11,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:55:11,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:55:11,854 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:55:11,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:55:11,855 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:55:11,855 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:55:11,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:55:11,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:55:11,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:55:11,856 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:55:11,856 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:55:11,856 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:55:11,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:55:11,857 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:55:11,857 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:55:11,857 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:55:11,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:55:11,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:55:11,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:55:11,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:55:11,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:55:11,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:55:11,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:55:11,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:55:11,859 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:55:11,859 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:55:11,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:55:11,859 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:55:11,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9065224c0b163ad014fc0aee4009feab43ed37ef70e06d8d8f3b14d045f755a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:55:12,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:55:12,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:55:12,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:55:12,135 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:55:12,135 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:55:12,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2023-08-30 04:55:13,060 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:55:13,232 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:55:13,233 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2023-08-30 04:55:13,237 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df2226ac0/6198932e703547e6a3e16911fa7ff6ad/FLAG294f0ce4d [2023-08-30 04:55:13,247 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df2226ac0/6198932e703547e6a3e16911fa7ff6ad [2023-08-30 04:55:13,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:55:13,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:55:13,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:55:13,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:55:13,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:55:13,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:55:13" (1/1) ... [2023-08-30 04:55:13,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a325f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:13, skipping insertion in model container [2023-08-30 04:55:13,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:55:13" (1/1) ... [2023-08-30 04:55:13,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:55:13,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:55:13,371 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2566,2579] [2023-08-30 04:55:13,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:55:13,384 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 04:55:13,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c4b4856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:13, skipping insertion in model container [2023-08-30 04:55:13,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:55:13,385 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 04:55:13,386 INFO L158 Benchmark]: Toolchain (without parser) took 136.41ms. Allocated memory is still 83.9MB. Free memory was 61.3MB in the beginning and 51.6MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 04:55:13,387 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 65.0MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 04:55:13,387 INFO L158 Benchmark]: CACSL2BoogieTranslator took 134.97ms. Allocated memory is still 83.9MB. Free memory was 61.0MB in the beginning and 51.6MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 04:55:13,388 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 65.0MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 134.97ms. Allocated memory is still 83.9MB. Free memory was 61.0MB in the beginning and 51.6MB 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: 102]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e9065224c0b163ad014fc0aee4009feab43ed37ef70e06d8d8f3b14d045f755a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:55:14,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:55:14,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:55:14,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:55:14,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:55:14,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:55:14,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:55:14,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:55:14,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:55:14,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:55:14,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:55:14,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:55:14,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:55:14,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:55:14,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:55:14,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:55:14,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:55:14,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:55:14,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:55:14,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:55:14,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:55:14,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:55:14,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:55:14,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:55:14,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:55:14,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:55:14,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:55:14,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:55:14,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:55:14,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:55:14,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:55:14,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:55:14,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:55:14,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:55:14,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:55:14,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:55:14,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:55:14,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:55:14,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:55:14,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:55:14,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:55:14,744 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 04:55:14,769 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:55:14,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:55:14,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:55:14,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:55:14,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:55:14,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:55:14,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:55:14,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:55:14,772 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:55:14,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:55:14,773 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:55:14,773 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:55:14,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:55:14,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:55:14,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:55:14,774 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:55:14,774 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:55:14,774 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:55:14,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:55:14,775 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:55:14,775 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 04:55:14,775 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 04:55:14,775 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:55:14,775 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:55:14,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:55:14,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:55:14,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:55:14,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:55:14,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:55:14,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:55:14,777 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 04:55:14,777 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 04:55:14,777 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:55:14,777 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:55:14,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:55:14,778 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 04:55:14,778 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:55:14,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9065224c0b163ad014fc0aee4009feab43ed37ef70e06d8d8f3b14d045f755a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:55:15,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:55:15,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:55:15,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:55:15,039 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:55:15,039 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:55:15,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2023-08-30 04:55:16,070 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:55:16,210 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:55:16,210 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2023-08-30 04:55:16,216 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206f344d3/bc370d8a68504e3cbe00c6ff20b856ea/FLAGbe7dba755 [2023-08-30 04:55:16,229 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206f344d3/bc370d8a68504e3cbe00c6ff20b856ea [2023-08-30 04:55:16,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:55:16,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:55:16,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:55:16,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:55:16,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:55:16,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e88293f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16, skipping insertion in model container [2023-08-30 04:55:16,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:55:16,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:55:16,356 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2566,2579] [2023-08-30 04:55:16,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:55:16,369 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 04:55:16,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:55:16,380 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2566,2579] [2023-08-30 04:55:16,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:55:16,385 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:55:16,398 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2566,2579] [2023-08-30 04:55:16,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:55:16,412 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:55:16,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16 WrapperNode [2023-08-30 04:55:16,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:55:16,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:55:16,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:55:16,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:55:16,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,455 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 174 [2023-08-30 04:55:16,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:55:16,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:55:16,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:55:16,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:55:16,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,499 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:55:16,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:55:16,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:55:16,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:55:16,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (1/1) ... [2023-08-30 04:55:16,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:55:16,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:55:16,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:55:16,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:55:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:55:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 04:55:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:55:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 04:55:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 04:55:16,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 04:55:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 04:55:16,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 04:55:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 04:55:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:55:16,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:55:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:55:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 04:55:16,563 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:55:16,693 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:55:16,694 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:55:17,090 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:55:17,095 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:55:17,095 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 04:55:17,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:55:17 BoogieIcfgContainer [2023-08-30 04:55:17,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:55:17,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:55:17,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:55:17,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:55:17,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:55:16" (1/3) ... [2023-08-30 04:55:17,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13facbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:55:17, skipping insertion in model container [2023-08-30 04:55:17,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:55:16" (2/3) ... [2023-08-30 04:55:17,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13facbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:55:17, skipping insertion in model container [2023-08-30 04:55:17,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:55:17" (3/3) ... [2023-08-30 04:55:17,104 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2023-08-30 04:55:17,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:55:17,122 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 04:55:17,122 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:55:17,215 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:55:17,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 227 transitions, 470 flow [2023-08-30 04:55:17,320 INFO L130 PetriNetUnfolder]: 19/225 cut-off events. [2023-08-30 04:55:17,320 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 04:55:17,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 225 events. 19/225 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 374 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 153. Up to 3 conditions per place. [2023-08-30 04:55:17,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 227 transitions, 470 flow [2023-08-30 04:55:17,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 221 transitions, 454 flow [2023-08-30 04:55:17,334 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:55:17,352 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 221 transitions, 454 flow [2023-08-30 04:55:17,356 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 221 transitions, 454 flow [2023-08-30 04:55:17,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 221 transitions, 454 flow [2023-08-30 04:55:17,395 INFO L130 PetriNetUnfolder]: 19/221 cut-off events. [2023-08-30 04:55:17,396 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 04:55:17,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 221 events. 19/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 377 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 153. Up to 3 conditions per place. [2023-08-30 04:55:17,400 INFO L119 LiptonReduction]: Number of co-enabled transitions 5460 [2023-08-30 04:55:35,509 INFO L134 LiptonReduction]: Checked pairs total: 8571 [2023-08-30 04:55:35,509 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-08-30 04:55:35,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:55:35,522 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;@328dc3a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:55:35,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-30 04:55:35,524 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 04:55:35,524 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:55:35,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:55:35,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:55:35,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:55:35,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:55:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash 28554, now seen corresponding path program 1 times [2023-08-30 04:55:35,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:55:35,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206495595] [2023-08-30 04:55:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:55:35,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:35,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:55:35,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:55:35,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 04:55:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:55:35,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 04:55:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:55:35,730 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:55:35,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:55:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:35,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:55:35,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:55:35,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206495595] [2023-08-30 04:55:35,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206495595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:55:35,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:55:35,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:55:35,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626393958] [2023-08-30 04:55:35,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:55:35,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:55:35,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:55:35,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:55:35,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:55:35,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 476 [2023-08-30 04:55:35,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:35,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:55:35,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 476 [2023-08-30 04:55:35,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:55:36,630 INFO L130 PetriNetUnfolder]: 1673/2669 cut-off events. [2023-08-30 04:55:36,630 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-30 04:55:36,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5394 conditions, 2669 events. 1673/2669 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 14553 event pairs, 1358 based on Foata normal form. 0/919 useless extension candidates. Maximal degree in co-relation 2548. Up to 1325 conditions per place. [2023-08-30 04:55:36,643 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 89 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-08-30 04:55:36,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 94 transitions, 398 flow [2023-08-30 04:55:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:55:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:55:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2023-08-30 04:55:36,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49159663865546216 [2023-08-30 04:55:36,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2023-08-30 04:55:36,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2023-08-30 04:55:36,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:55:36,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2023-08-30 04:55:36,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.0) internal successors, (702), 3 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) [2023-08-30 04:55:36,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:36,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:36,674 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 120 flow. Second operand 3 states and 702 transitions. [2023-08-30 04:55:36,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 94 transitions, 398 flow [2023-08-30 04:55:36,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 94 transitions, 382 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 04:55:36,682 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 134 flow [2023-08-30 04:55:36,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2023-08-30 04:55:36,686 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2023-08-30 04:55:36,687 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 134 flow [2023-08-30 04:55:36,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:36,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:55:36,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:55:36,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:55:36,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:36,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:55:36,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:55:36,901 INFO L85 PathProgramCache]: Analyzing trace with hash 28556, now seen corresponding path program 1 times [2023-08-30 04:55:36,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:55:36,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974995070] [2023-08-30 04:55:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:55:36,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:36,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:55:36,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:55:36,906 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 (3)] Waiting until timeout for monitored process [2023-08-30 04:55:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:55:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:55:36,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:55:36,982 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:55:36,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:55:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:37,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:55:37,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:55:37,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974995070] [2023-08-30 04:55:37,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974995070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:55:37,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:55:37,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:55:37,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700444029] [2023-08-30 04:55:37,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:55:37,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:55:37,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:55:37,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:55:37,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:55:37,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 476 [2023-08-30 04:55:37,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:37,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:55:37,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 476 [2023-08-30 04:55:37,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:55:37,484 INFO L130 PetriNetUnfolder]: 1673/2665 cut-off events. [2023-08-30 04:55:37,484 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 04:55:37,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5353 conditions, 2665 events. 1673/2665 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 14613 event pairs, 1358 based on Foata normal form. 2/905 useless extension candidates. Maximal degree in co-relation 2665. Up to 2641 conditions per place. [2023-08-30 04:55:37,493 INFO L137 encePairwiseOnDemand]: 473/476 looper letters, 48 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 04:55:37,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 228 flow [2023-08-30 04:55:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:55:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:55:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 651 transitions. [2023-08-30 04:55:37,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2023-08-30 04:55:37,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 651 transitions. [2023-08-30 04:55:37,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 651 transitions. [2023-08-30 04:55:37,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:55:37,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 651 transitions. [2023-08-30 04:55:37,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:37,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:37,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:37,500 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 134 flow. Second operand 3 states and 651 transitions. [2023-08-30 04:55:37,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 228 flow [2023-08-30 04:55:37,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:55:37,503 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 124 flow [2023-08-30 04:55:37,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2023-08-30 04:55:37,504 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-08-30 04:55:37,504 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 124 flow [2023-08-30 04:55:37,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:37,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:55:37,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:55:37,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:55:37,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:37,712 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:55:37,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:55:37,714 INFO L85 PathProgramCache]: Analyzing trace with hash 888773, now seen corresponding path program 1 times [2023-08-30 04:55:37,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:55:37,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146560804] [2023-08-30 04:55:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:55:37,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:37,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:55:37,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:55:37,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 04:55:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:55:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 04:55:37,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:55:37,824 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:55:37,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:55:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:37,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:55:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:37,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:55:37,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146560804] [2023-08-30 04:55:37,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146560804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:55:37,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:55:37,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 04:55:37,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161730318] [2023-08-30 04:55:37,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:55:37,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:55:37,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:55:37,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:55:37,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:55:38,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 476 [2023-08-30 04:55:38,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 124 flow. Second operand has 6 states, 6 states have (on average 196.0) internal successors, (1176), 6 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:38,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:55:38,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 476 [2023-08-30 04:55:38,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:55:40,830 INFO L130 PetriNetUnfolder]: 4181/6658 cut-off events. [2023-08-30 04:55:40,832 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 04:55:40,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13354 conditions, 6658 events. 4181/6658 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 40546 event pairs, 3395 based on Foata normal form. 0/2331 useless extension candidates. Maximal degree in co-relation 13346. Up to 1323 conditions per place. [2023-08-30 04:55:40,869 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 205 selfloop transitions, 13 changer transitions 0/219 dead transitions. [2023-08-30 04:55:40,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 219 transitions, 932 flow [2023-08-30 04:55:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:55:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:55:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1394 transitions. [2023-08-30 04:55:40,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2023-08-30 04:55:40,873 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1394 transitions. [2023-08-30 04:55:40,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1394 transitions. [2023-08-30 04:55:40,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:55:40,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1394 transitions. [2023-08-30 04:55:40,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 232.33333333333334) internal successors, (1394), 6 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:40,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:40,881 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:40,881 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 124 flow. Second operand 6 states and 1394 transitions. [2023-08-30 04:55:40,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 219 transitions, 932 flow [2023-08-30 04:55:40,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 219 transitions, 931 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:55:40,886 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 216 flow [2023-08-30 04:55:40,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-30 04:55:40,889 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-08-30 04:55:40,889 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 216 flow [2023-08-30 04:55:40,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.0) internal successors, (1176), 6 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:40,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:55:40,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:55:40,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:55:41,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:41,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:55:41,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:55:41,098 INFO L85 PathProgramCache]: Analyzing trace with hash 889750, now seen corresponding path program 1 times [2023-08-30 04:55:41,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:55:41,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813383719] [2023-08-30 04:55:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:55:41,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:41,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:55:41,103 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:55:41,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 04:55:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:55:41,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 04:55:41,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:55:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:41,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:55:41,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:55:41,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813383719] [2023-08-30 04:55:41,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813383719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:55:41,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:55:41,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:55:41,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258058181] [2023-08-30 04:55:41,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:55:41,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:55:41,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:55:41,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:55:41,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:55:41,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 476 [2023-08-30 04:55:41,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:41,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:55:41,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 476 [2023-08-30 04:55:41,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:55:41,725 INFO L130 PetriNetUnfolder]: 3345/5329 cut-off events. [2023-08-30 04:55:41,726 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2023-08-30 04:55:41,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10725 conditions, 5329 events. 3345/5329 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 32604 event pairs, 2716 based on Foata normal form. 2/1809 useless extension candidates. Maximal degree in co-relation 10713. Up to 5277 conditions per place. [2023-08-30 04:55:41,743 INFO L137 encePairwiseOnDemand]: 469/476 looper letters, 50 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2023-08-30 04:55:41,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 326 flow [2023-08-30 04:55:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:55:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:55:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 661 transitions. [2023-08-30 04:55:41,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46288515406162467 [2023-08-30 04:55:41,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 661 transitions. [2023-08-30 04:55:41,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 661 transitions. [2023-08-30 04:55:41,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:55:41,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 661 transitions. [2023-08-30 04:55:41,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:41,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:41,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:41,750 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 216 flow. Second operand 3 states and 661 transitions. [2023-08-30 04:55:41,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 326 flow [2023-08-30 04:55:41,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 307 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:55:41,754 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 220 flow [2023-08-30 04:55:41,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-08-30 04:55:41,755 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-30 04:55:41,755 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 220 flow [2023-08-30 04:55:41,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:41,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:55:41,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:55:41,777 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 [2023-08-30 04:55:41,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:41,965 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:55:41,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:55:41,965 INFO L85 PathProgramCache]: Analyzing trace with hash 854253348, now seen corresponding path program 1 times [2023-08-30 04:55:41,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:55:41,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015768770] [2023-08-30 04:55:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:55:41,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:41,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:55:41,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:55:41,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 04:55:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:55:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:55:42,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:55:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:55:42,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:55:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:55:42,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:55:42,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015768770] [2023-08-30 04:55:42,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015768770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:55:42,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:55:42,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-30 04:55:42,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348304436] [2023-08-30 04:55:42,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:55:42,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:55:42,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:55:42,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:55:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:55:42,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 476 [2023-08-30 04:55:42,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 200.33333333333334) internal successors, (1202), 6 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:42,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:55:42,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 476 [2023-08-30 04:55:42,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:55:42,669 INFO L130 PetriNetUnfolder]: 837/1342 cut-off events. [2023-08-30 04:55:42,669 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 04:55:42,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2736 conditions, 1342 events. 837/1342 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 6386 event pairs, 679 based on Foata normal form. 6/468 useless extension candidates. Maximal degree in co-relation 2722. Up to 1321 conditions per place. [2023-08-30 04:55:42,673 INFO L137 encePairwiseOnDemand]: 467/476 looper letters, 42 selfloop transitions, 12 changer transitions 0/55 dead transitions. [2023-08-30 04:55:42,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 301 flow [2023-08-30 04:55:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:55:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:55:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1260 transitions. [2023-08-30 04:55:42,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2023-08-30 04:55:42,676 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1260 transitions. [2023-08-30 04:55:42,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1260 transitions. [2023-08-30 04:55:42,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:55:42,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1260 transitions. [2023-08-30 04:55:42,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 210.0) internal successors, (1260), 6 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:42,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:42,683 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:42,683 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 220 flow. Second operand 6 states and 1260 transitions. [2023-08-30 04:55:42,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 301 flow [2023-08-30 04:55:42,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:55:42,684 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 241 flow [2023-08-30 04:55:42,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-30 04:55:42,685 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2023-08-30 04:55:42,685 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 241 flow [2023-08-30 04:55:42,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 200.33333333333334) internal successors, (1202), 6 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:42,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:55:42,686 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 04:55:42,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 04:55:42,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:42,894 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:55:42,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:55:42,895 INFO L85 PathProgramCache]: Analyzing trace with hash 711206474, now seen corresponding path program 2 times [2023-08-30 04:55:42,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:55:42,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435518549] [2023-08-30 04:55:42,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:55:42,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:55:42,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:55:42,896 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:55:42,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 04:55:42,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:55:42,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:55:42,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:55:42,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:55:42,990 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:55:42,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:55:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:43,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:55:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:55:43,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:55:43,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435518549] [2023-08-30 04:55:43,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435518549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:55:43,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:55:43,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:55:43,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323151071] [2023-08-30 04:55:43,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:55:43,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:55:43,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:55:43,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:55:43,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:55:47,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 476 [2023-08-30 04:55:47,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 241 flow. Second operand has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:55:47,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:55:47,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 476 [2023-08-30 04:55:47,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:55:49,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:50,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:53,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:54,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:55:56,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:56:01,928 INFO L130 PetriNetUnfolder]: 4185/6674 cut-off events. [2023-08-30 04:56:01,928 INFO L131 PetriNetUnfolder]: For 208/208 co-relation queries the response was YES. [2023-08-30 04:56:01,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13532 conditions, 6674 events. 4185/6674 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 41866 event pairs, 3395 based on Foata normal form. 14/2366 useless extension candidates. Maximal degree in co-relation 13515. Up to 1321 conditions per place. [2023-08-30 04:56:01,945 INFO L137 encePairwiseOnDemand]: 467/476 looper letters, 204 selfloop transitions, 30 changer transitions 0/235 dead transitions. [2023-08-30 04:56:01,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 235 transitions, 1283 flow [2023-08-30 04:56:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:56:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:56:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2542 transitions. [2023-08-30 04:56:01,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44502801120448177 [2023-08-30 04:56:01,951 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2542 transitions. [2023-08-30 04:56:01,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2542 transitions. [2023-08-30 04:56:01,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:01,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2542 transitions. [2023-08-30 04:56:01,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 211.83333333333334) internal successors, (2542), 12 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:01,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 476.0) internal successors, (6188), 13 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:01,961 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 476.0) internal successors, (6188), 13 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:01,961 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 241 flow. Second operand 12 states and 2542 transitions. [2023-08-30 04:56:01,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 235 transitions, 1283 flow [2023-08-30 04:56:01,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 235 transitions, 1236 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-30 04:56:01,965 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 475 flow [2023-08-30 04:56:01,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=475, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-08-30 04:56:01,966 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2023-08-30 04:56:01,966 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 475 flow [2023-08-30 04:56:01,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:01,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:01,967 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 04:56:01,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-08-30 04:56:02,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:02,174 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:02,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash 283452522, now seen corresponding path program 3 times [2023-08-30 04:56:02,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:02,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402176837] [2023-08-30 04:56:02,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:56:02,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:02,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:02,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:02,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 04:56:02,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 04:56:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:56:02,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:56:02,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:02,353 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:56:02,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:56:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:56:02,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:56:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:56:04,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:04,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402176837] [2023-08-30 04:56:04,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402176837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:56:04,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:56:04,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 04:56:04,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640033559] [2023-08-30 04:56:04,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:56:04,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 04:56:04,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:04,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 04:56:04,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 04:56:21,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 476 [2023-08-30 04:56:21,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 475 flow. Second operand has 24 states, 24 states have (on average 190.0) internal successors, (4560), 24 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:21,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:21,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 476 [2023-08-30 04:56:21,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:22,174 INFO L130 PetriNetUnfolder]: 835/1340 cut-off events. [2023-08-30 04:56:22,174 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:56:22,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2760 conditions, 1340 events. 835/1340 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 6379 event pairs, 679 based on Foata normal form. 2/462 useless extension candidates. Maximal degree in co-relation 2744. Up to 1318 conditions per place. [2023-08-30 04:56:22,177 INFO L137 encePairwiseOnDemand]: 472/476 looper letters, 40 selfloop transitions, 12 changer transitions 0/53 dead transitions. [2023-08-30 04:56:22,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 53 transitions, 335 flow [2023-08-30 04:56:22,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:56:22,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:56:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1566 transitions. [2023-08-30 04:56:22,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112394957983193 [2023-08-30 04:56:22,201 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1566 transitions. [2023-08-30 04:56:22,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1566 transitions. [2023-08-30 04:56:22,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:22,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1566 transitions. [2023-08-30 04:56:22,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.75) internal successors, (1566), 8 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:22,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:22,212 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:22,212 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 475 flow. Second operand 8 states and 1566 transitions. [2023-08-30 04:56:22,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 53 transitions, 335 flow [2023-08-30 04:56:22,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 53 transitions, 288 flow, removed 7 selfloop flow, removed 10 redundant places. [2023-08-30 04:56:22,214 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 208 flow [2023-08-30 04:56:22,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=208, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2023-08-30 04:56:22,215 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2023-08-30 04:56:22,215 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 208 flow [2023-08-30 04:56:22,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 190.0) internal successors, (4560), 24 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:22,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:22,217 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-08-30 04:56:22,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:22,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:22,426 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:22,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash -426768858, now seen corresponding path program 1 times [2023-08-30 04:56:22,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:22,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304434103] [2023-08-30 04:56:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:22,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:22,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:22,427 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:22,428 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 (9)] Waiting until timeout for monitored process [2023-08-30 04:56:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:22,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:56:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:22,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:22,607 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-30 04:56:22,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 04:56:22,689 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:56:22,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:56:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:22,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:22,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:22,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304434103] [2023-08-30 04:56:22,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304434103] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:22,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:22,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:56:22,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234320684] [2023-08-30 04:56:22,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:22,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:56:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:22,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:56:22,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:56:22,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 476 [2023-08-30 04:56:22,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:22,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:22,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 476 [2023-08-30 04:56:22,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:23,108 INFO L130 PetriNetUnfolder]: 625/1029 cut-off events. [2023-08-30 04:56:23,109 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 04:56:23,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2120 conditions, 1029 events. 625/1029 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 4733 event pairs, 504 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 2108. Up to 1019 conditions per place. [2023-08-30 04:56:23,112 INFO L137 encePairwiseOnDemand]: 473/476 looper letters, 49 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 04:56:23,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 51 transitions, 294 flow [2023-08-30 04:56:23,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:56:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:56:23,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2023-08-30 04:56:23,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45938375350140054 [2023-08-30 04:56:23,114 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2023-08-30 04:56:23,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2023-08-30 04:56:23,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:23,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2023-08-30 04:56:23,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:23,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:23,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:23,117 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 208 flow. Second operand 3 states and 656 transitions. [2023-08-30 04:56:23,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 51 transitions, 294 flow [2023-08-30 04:56:23,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 51 transitions, 270 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 04:56:23,118 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 172 flow [2023-08-30 04:56:23,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-08-30 04:56:23,119 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-30 04:56:23,119 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 172 flow [2023-08-30 04:56:23,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:23,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:23,120 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-08-30 04:56:23,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:23,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:23,327 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:23,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:23,328 INFO L85 PathProgramCache]: Analyzing trace with hash -426768860, now seen corresponding path program 2 times [2023-08-30 04:56:23,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:23,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716785782] [2023-08-30 04:56:23,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:56:23,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:23,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:23,332 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:23,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 04:56:23,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:56:23,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:56:23,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 04:56:23,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:23,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:23,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:23,445 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:56:23,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 04:56:23,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 04:56:23,581 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:56:23,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-30 04:56:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:23,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:23,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:23,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716785782] [2023-08-30 04:56:23,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716785782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:23,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:23,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:56:23,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572819161] [2023-08-30 04:56:23,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:23,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:56:23,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:23,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:56:23,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:56:24,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 476 [2023-08-30 04:56:24,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:24,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:24,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 476 [2023-08-30 04:56:24,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:24,388 INFO L130 PetriNetUnfolder]: 415/718 cut-off events. [2023-08-30 04:56:24,388 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 04:56:24,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 718 events. 415/718 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3216 event pairs, 329 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 1472. Up to 704 conditions per place. [2023-08-30 04:56:24,390 INFO L137 encePairwiseOnDemand]: 472/476 looper letters, 46 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-30 04:56:24,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 49 transitions, 254 flow [2023-08-30 04:56:24,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:56:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:56:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 854 transitions. [2023-08-30 04:56:24,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2023-08-30 04:56:24,392 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 854 transitions. [2023-08-30 04:56:24,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 854 transitions. [2023-08-30 04:56:24,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:24,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 854 transitions. [2023-08-30 04:56:24,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:24,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:24,397 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:24,397 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 172 flow. Second operand 4 states and 854 transitions. [2023-08-30 04:56:24,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 49 transitions, 254 flow [2023-08-30 04:56:24,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 49 transitions, 253 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:56:24,399 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 161 flow [2023-08-30 04:56:24,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-08-30 04:56:24,399 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-30 04:56:24,400 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 161 flow [2023-08-30 04:56:24,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:24,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:24,400 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-30 04:56:24,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-08-30 04:56:24,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:24,607 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:24,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2102960439, now seen corresponding path program 1 times [2023-08-30 04:56:24,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:24,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857889977] [2023-08-30 04:56:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:24,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:24,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:24,609 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:24,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 04:56:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:24,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 04:56:24,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:24,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:24,812 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-30 04:56:24,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-30 04:56:24,819 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 [2023-08-30 04:56:24,881 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:56:24,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-30 04:56:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:24,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:24,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:24,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857889977] [2023-08-30 04:56:24,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857889977] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:24,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:24,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:56:24,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165723065] [2023-08-30 04:56:24,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:24,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:56:24,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:24,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:56:24,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:56:25,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 476 [2023-08-30 04:56:25,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:25,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:25,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 476 [2023-08-30 04:56:25,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:25,437 INFO L130 PetriNetUnfolder]: 392/673 cut-off events. [2023-08-30 04:56:25,437 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 04:56:25,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 673 events. 392/673 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 2929 event pairs, 310 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 1385. Up to 660 conditions per place. [2023-08-30 04:56:25,439 INFO L137 encePairwiseOnDemand]: 472/476 looper letters, 44 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-30 04:56:25,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 249 flow [2023-08-30 04:56:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:56:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:56:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 852 transitions. [2023-08-30 04:56:25,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4474789915966387 [2023-08-30 04:56:25,454 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 852 transitions. [2023-08-30 04:56:25,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 852 transitions. [2023-08-30 04:56:25,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:25,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 852 transitions. [2023-08-30 04:56:25,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:25,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:25,458 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:25,458 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 161 flow. Second operand 4 states and 852 transitions. [2023-08-30 04:56:25,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 249 flow [2023-08-30 04:56:25,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:56:25,459 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 158 flow [2023-08-30 04:56:25,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2023-08-30 04:56:25,461 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-30 04:56:25,461 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 158 flow [2023-08-30 04:56:25,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:25,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:25,462 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-30 04:56:25,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:25,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:25,673 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:25,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:25,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2102960440, now seen corresponding path program 1 times [2023-08-30 04:56:25,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:25,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770618003] [2023-08-30 04:56:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:25,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:25,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:25,675 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:25,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 04:56:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:25,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:56:25,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:25,854 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 04:56:25,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-30 04:56:25,882 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:56:25,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:56:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:25,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:25,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:25,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770618003] [2023-08-30 04:56:25,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770618003] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:25,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:25,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:56:25,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135320822] [2023-08-30 04:56:25,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:25,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:56:25,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:25,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:56:25,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:56:25,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 476 [2023-08-30 04:56:25,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:25,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:25,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 476 [2023-08-30 04:56:25,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:26,153 INFO L130 PetriNetUnfolder]: 369/628 cut-off events. [2023-08-30 04:56:26,153 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 04:56:26,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1309 conditions, 628 events. 369/628 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 2699 event pairs, 291 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 1297. Up to 622 conditions per place. [2023-08-30 04:56:26,155 INFO L137 encePairwiseOnDemand]: 473/476 looper letters, 43 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 04:56:26,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 45 transitions, 242 flow [2023-08-30 04:56:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:56:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:56:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-30 04:56:26,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2023-08-30 04:56:26,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-30 04:56:26,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-30 04:56:26,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:26,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-30 04:56:26,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:26,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:26,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:26,159 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 158 flow. Second operand 3 states and 644 transitions. [2023-08-30 04:56:26,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 45 transitions, 242 flow [2023-08-30 04:56:26,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:56:26,161 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 153 flow [2023-08-30 04:56:26,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-08-30 04:56:26,161 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-08-30 04:56:26,161 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 153 flow [2023-08-30 04:56:26,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:26,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:26,162 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:26,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-30 04:56:26,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:26,370 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:26,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash -767262096, now seen corresponding path program 1 times [2023-08-30 04:56:26,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:26,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578278788] [2023-08-30 04:56:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:26,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:26,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:26,373 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:26,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 04:56:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:26,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:56:26,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:26,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 04:56:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:26,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:26,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578278788] [2023-08-30 04:56:26,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578278788] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:26,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:26,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:56:26,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457361900] [2023-08-30 04:56:26,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:26,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:56:26,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:56:26,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:56:26,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 476 [2023-08-30 04:56:26,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:26,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:26,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 476 [2023-08-30 04:56:26,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:26,866 INFO L130 PetriNetUnfolder]: 281/482 cut-off events. [2023-08-30 04:56:26,866 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 04:56:26,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 482 events. 281/482 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 1916 event pairs, 213 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 1003. Up to 464 conditions per place. [2023-08-30 04:56:26,868 INFO L137 encePairwiseOnDemand]: 471/476 looper letters, 39 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-30 04:56:26,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 42 transitions, 229 flow [2023-08-30 04:56:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:56:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:56:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 800 transitions. [2023-08-30 04:56:26,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42016806722689076 [2023-08-30 04:56:26,870 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 800 transitions. [2023-08-30 04:56:26,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 800 transitions. [2023-08-30 04:56:26,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:26,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 800 transitions. [2023-08-30 04:56:26,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:26,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:26,873 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:26,873 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 153 flow. Second operand 4 states and 800 transitions. [2023-08-30 04:56:26,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 42 transitions, 229 flow [2023-08-30 04:56:26,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:56:26,874 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 150 flow [2023-08-30 04:56:26,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-30 04:56:26,875 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2023-08-30 04:56:26,875 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 150 flow [2023-08-30 04:56:26,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:26,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:26,875 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:26,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-08-30 04:56:27,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:27,083 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:27,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash -767262236, now seen corresponding path program 1 times [2023-08-30 04:56:27,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:27,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308807786] [2023-08-30 04:56:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:27,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:27,085 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:27,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 04:56:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:27,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 04:56:27,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:27,284 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:56:27,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:56:27,320 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:56:27,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:56:27,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:27,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:56:27,386 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:56:27,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:56:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:27,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:27,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:27,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308807786] [2023-08-30 04:56:27,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308807786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:27,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:27,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:56:27,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097315034] [2023-08-30 04:56:27,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:27,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:56:27,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:56:27,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:56:27,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 476 [2023-08-30 04:56:27,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:27,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:27,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 476 [2023-08-30 04:56:27,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:28,008 INFO L130 PetriNetUnfolder]: 501/864 cut-off events. [2023-08-30 04:56:28,008 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 04:56:28,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 864 events. 501/864 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4075 event pairs, 213 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 1756. Up to 470 conditions per place. [2023-08-30 04:56:28,011 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 61 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-08-30 04:56:28,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 331 flow [2023-08-30 04:56:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:56:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:56:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1024 transitions. [2023-08-30 04:56:28,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43025210084033616 [2023-08-30 04:56:28,013 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1024 transitions. [2023-08-30 04:56:28,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1024 transitions. [2023-08-30 04:56:28,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:28,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1024 transitions. [2023-08-30 04:56:28,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.8) internal successors, (1024), 5 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:28,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:28,017 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:28,017 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 150 flow. Second operand 5 states and 1024 transitions. [2023-08-30 04:56:28,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 331 flow [2023-08-30 04:56:28,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:56:28,018 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 165 flow [2023-08-30 04:56:28,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2023-08-30 04:56:28,019 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-30 04:56:28,019 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 165 flow [2023-08-30 04:56:28,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:28,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:28,020 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:28,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:28,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:28,228 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:28,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash -767262095, now seen corresponding path program 1 times [2023-08-30 04:56:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:28,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418542558] [2023-08-30 04:56:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:28,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:28,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:28,230 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:28,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 04:56:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:28,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:56:28,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:28,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:56:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:28,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:28,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:28,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418542558] [2023-08-30 04:56:28,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418542558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:28,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:28,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:56:28,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489596101] [2023-08-30 04:56:28,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:28,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:56:28,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:28,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:56:28,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:56:28,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 476 [2023-08-30 04:56:28,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 198.6) internal successors, (993), 5 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:28,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:28,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 476 [2023-08-30 04:56:28,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:28,964 INFO L130 PetriNetUnfolder]: 461/796 cut-off events. [2023-08-30 04:56:28,964 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-30 04:56:28,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1716 conditions, 796 events. 461/796 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3659 event pairs, 213 based on Foata normal form. 14/516 useless extension candidates. Maximal degree in co-relation 1703. Up to 464 conditions per place. [2023-08-30 04:56:28,966 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 59 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-30 04:56:28,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 336 flow [2023-08-30 04:56:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:56:28,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:56:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1042 transitions. [2023-08-30 04:56:28,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43781512605042017 [2023-08-30 04:56:28,983 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1042 transitions. [2023-08-30 04:56:28,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1042 transitions. [2023-08-30 04:56:28,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:28,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1042 transitions. [2023-08-30 04:56:28,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.4) internal successors, (1042), 5 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:28,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:28,987 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:28,987 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 165 flow. Second operand 5 states and 1042 transitions. [2023-08-30 04:56:28,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 336 flow [2023-08-30 04:56:28,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 330 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:56:28,988 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 173 flow [2023-08-30 04:56:28,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-30 04:56:28,989 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2023-08-30 04:56:28,989 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 173 flow [2023-08-30 04:56:28,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 198.6) internal successors, (993), 5 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:28,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:28,990 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:28,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:29,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:29,200 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:29,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:29,201 INFO L85 PathProgramCache]: Analyzing trace with hash -767262237, now seen corresponding path program 1 times [2023-08-30 04:56:29,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:29,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047140275] [2023-08-30 04:56:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:29,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:29,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:29,202 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:29,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 04:56:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:29,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:56:29,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:29,374 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:56:29,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:56:29,398 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 04:56:29,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 04:56:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:29,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:29,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047140275] [2023-08-30 04:56:29,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047140275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:29,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:29,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:56:29,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620727921] [2023-08-30 04:56:29,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:29,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:56:29,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:56:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:56:29,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 476 [2023-08-30 04:56:29,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:29,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:29,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 476 [2023-08-30 04:56:29,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:29,697 INFO L130 PetriNetUnfolder]: 358/599 cut-off events. [2023-08-30 04:56:29,697 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-08-30 04:56:29,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 599 events. 358/599 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2318 event pairs, 260 based on Foata normal form. 0/437 useless extension candidates. Maximal degree in co-relation 1371. Up to 593 conditions per place. [2023-08-30 04:56:29,699 INFO L137 encePairwiseOnDemand]: 471/476 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-30 04:56:29,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 40 transitions, 247 flow [2023-08-30 04:56:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:56:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:56:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 798 transitions. [2023-08-30 04:56:29,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41911764705882354 [2023-08-30 04:56:29,701 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 798 transitions. [2023-08-30 04:56:29,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 798 transitions. [2023-08-30 04:56:29,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:29,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 798 transitions. [2023-08-30 04:56:29,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:29,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:29,704 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:29,705 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 173 flow. Second operand 4 states and 798 transitions. [2023-08-30 04:56:29,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 40 transitions, 247 flow [2023-08-30 04:56:29,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 40 transitions, 239 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 04:56:29,706 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 163 flow [2023-08-30 04:56:29,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2023-08-30 04:56:29,706 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-08-30 04:56:29,707 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 163 flow [2023-08-30 04:56:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:29,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:29,707 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:29,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-08-30 04:56:29,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:29,915 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:29,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1394070944, now seen corresponding path program 1 times [2023-08-30 04:56:29,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:29,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693520241] [2023-08-30 04:56:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:29,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:29,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:29,917 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:29,917 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 (17)] Waiting until timeout for monitored process [2023-08-30 04:56:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:30,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:56:30,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:30,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:56:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:30,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:30,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:30,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693520241] [2023-08-30 04:56:30,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693520241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:30,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:30,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:56:30,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493503810] [2023-08-30 04:56:30,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:30,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:56:30,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:30,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:56:30,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:56:30,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 476 [2023-08-30 04:56:30,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:30,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:30,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 476 [2023-08-30 04:56:30,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:30,670 INFO L130 PetriNetUnfolder]: 495/827 cut-off events. [2023-08-30 04:56:30,671 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2023-08-30 04:56:30,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1854 conditions, 827 events. 495/827 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3530 event pairs, 230 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 1840. Up to 529 conditions per place. [2023-08-30 04:56:30,676 INFO L137 encePairwiseOnDemand]: 471/476 looper letters, 56 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-08-30 04:56:30,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 343 flow [2023-08-30 04:56:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:56:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:56:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1036 transitions. [2023-08-30 04:56:30,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43529411764705883 [2023-08-30 04:56:30,683 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1036 transitions. [2023-08-30 04:56:30,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1036 transitions. [2023-08-30 04:56:30,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:30,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1036 transitions. [2023-08-30 04:56:30,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.2) internal successors, (1036), 5 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:30,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:30,688 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:30,688 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 163 flow. Second operand 5 states and 1036 transitions. [2023-08-30 04:56:30,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 343 flow [2023-08-30 04:56:30,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:56:30,690 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 176 flow [2023-08-30 04:56:30,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-30 04:56:30,691 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-30 04:56:30,691 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 176 flow [2023-08-30 04:56:30,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:30,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:30,692 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:30,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:30,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:30,900 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:30,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1394070986, now seen corresponding path program 1 times [2023-08-30 04:56:30,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:30,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404871648] [2023-08-30 04:56:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:30,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:30,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:30,901 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:30,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 04:56:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 04:56:31,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:31,136 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:56:31,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:56:31,184 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:56:31,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:56:31,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:31,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:56:31,257 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:56:31,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:56:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:31,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:31,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:31,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404871648] [2023-08-30 04:56:31,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404871648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:31,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:31,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:56:31,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38637949] [2023-08-30 04:56:31,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:31,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:56:31,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:31,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:56:31,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:56:31,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 476 [2023-08-30 04:56:31,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:31,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:31,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 476 [2023-08-30 04:56:31,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:31,986 INFO L130 PetriNetUnfolder]: 438/736 cut-off events. [2023-08-30 04:56:31,986 INFO L131 PetriNetUnfolder]: For 246/246 co-relation queries the response was YES. [2023-08-30 04:56:31,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 736 events. 438/736 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3002 event pairs, 230 based on Foata normal form. 0/603 useless extension candidates. Maximal degree in co-relation 1813. Up to 535 conditions per place. [2023-08-30 04:56:31,989 INFO L137 encePairwiseOnDemand]: 471/476 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-30 04:56:31,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 60 transitions, 350 flow [2023-08-30 04:56:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:56:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:56:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1015 transitions. [2023-08-30 04:56:31,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264705882352941 [2023-08-30 04:56:31,992 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1015 transitions. [2023-08-30 04:56:31,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1015 transitions. [2023-08-30 04:56:31,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:31,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1015 transitions. [2023-08-30 04:56:31,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,003 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,003 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 176 flow. Second operand 5 states and 1015 transitions. [2023-08-30 04:56:32,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 60 transitions, 350 flow [2023-08-30 04:56:32,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 344 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:56:32,005 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 182 flow [2023-08-30 04:56:32,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2023-08-30 04:56:32,005 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-08-30 04:56:32,005 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 182 flow [2023-08-30 04:56:32,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:32,006 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:32,014 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 (18)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:32,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:32,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:32,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash 307453228, now seen corresponding path program 1 times [2023-08-30 04:56:32,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:32,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002880321] [2023-08-30 04:56:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:32,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:32,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:32,216 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:32,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 04:56:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:32,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 04:56:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:32,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:32,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:32,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002880321] [2023-08-30 04:56:32,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002880321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:32,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:32,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:56:32,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709443836] [2023-08-30 04:56:32,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:32,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:56:32,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:56:32,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:56:32,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 476 [2023-08-30 04:56:32,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:32,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 476 [2023-08-30 04:56:32,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:32,681 INFO L130 PetriNetUnfolder]: 526/934 cut-off events. [2023-08-30 04:56:32,681 INFO L131 PetriNetUnfolder]: For 506/506 co-relation queries the response was YES. [2023-08-30 04:56:32,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2417 conditions, 934 events. 526/934 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4303 event pairs, 324 based on Foata normal form. 32/854 useless extension candidates. Maximal degree in co-relation 2401. Up to 696 conditions per place. [2023-08-30 04:56:32,685 INFO L137 encePairwiseOnDemand]: 474/476 looper letters, 53 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 04:56:32,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 337 flow [2023-08-30 04:56:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:56:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:56:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2023-08-30 04:56:32,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2023-08-30 04:56:32,687 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2023-08-30 04:56:32,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2023-08-30 04:56:32,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:32,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2023-08-30 04:56:32,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,691 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 182 flow. Second operand 3 states and 668 transitions. [2023-08-30 04:56:32,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 337 flow [2023-08-30 04:56:32,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 55 transitions, 325 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 04:56:32,694 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 181 flow [2023-08-30 04:56:32,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-30 04:56:32,694 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2023-08-30 04:56:32,694 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 181 flow [2023-08-30 04:56:32,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:32,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:32,695 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:32,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:32,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:32,904 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:32,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash 266531624, now seen corresponding path program 1 times [2023-08-30 04:56:32,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:32,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419222877] [2023-08-30 04:56:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:32,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:32,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:32,905 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:32,906 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 (20)] Waiting until timeout for monitored process [2023-08-30 04:56:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:33,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:56:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:33,157 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:56:33,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:56:33,189 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:56:33,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:56:33,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:33,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:56:33,242 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:56:33,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:56:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:33,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:56:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:33,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:33,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419222877] [2023-08-30 04:56:33,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419222877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:56:33,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:56:33,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 04:56:33,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868352448] [2023-08-30 04:56:33,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:56:33,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:56:33,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:33,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:56:33,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:56:36,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 476 [2023-08-30 04:56:36,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 181 flow. Second operand has 10 states, 10 states have (on average 193.2) internal successors, (1932), 10 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:36,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:36,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 476 [2023-08-30 04:56:36,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:37,004 INFO L130 PetriNetUnfolder]: 1147/1983 cut-off events. [2023-08-30 04:56:37,004 INFO L131 PetriNetUnfolder]: For 843/843 co-relation queries the response was YES. [2023-08-30 04:56:37,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4988 conditions, 1983 events. 1147/1983 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10677 event pairs, 306 based on Foata normal form. 138/1868 useless extension candidates. Maximal degree in co-relation 4971. Up to 671 conditions per place. [2023-08-30 04:56:37,010 INFO L137 encePairwiseOnDemand]: 471/476 looper letters, 115 selfloop transitions, 7 changer transitions 0/123 dead transitions. [2023-08-30 04:56:37,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 123 transitions, 701 flow [2023-08-30 04:56:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:56:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:56:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1640 transitions. [2023-08-30 04:56:37,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43067226890756305 [2023-08-30 04:56:37,013 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1640 transitions. [2023-08-30 04:56:37,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1640 transitions. [2023-08-30 04:56:37,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:37,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1640 transitions. [2023-08-30 04:56:37,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 205.0) internal successors, (1640), 8 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:37,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:37,019 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:37,019 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 181 flow. Second operand 8 states and 1640 transitions. [2023-08-30 04:56:37,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 123 transitions, 701 flow [2023-08-30 04:56:37,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 123 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:56:37,021 INFO L231 Difference]: Finished difference. Result has 68 places, 44 transitions, 220 flow [2023-08-30 04:56:37,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=220, PETRI_PLACES=68, PETRI_TRANSITIONS=44} [2023-08-30 04:56:37,022 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2023-08-30 04:56:37,022 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 44 transitions, 220 flow [2023-08-30 04:56:37,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 193.2) internal successors, (1932), 10 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:37,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:37,022 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:37,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:37,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:37,227 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:37,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:37,227 INFO L85 PathProgramCache]: Analyzing trace with hash 266531582, now seen corresponding path program 1 times [2023-08-30 04:56:37,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:37,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985246211] [2023-08-30 04:56:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:37,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:37,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:37,228 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:37,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 04:56:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:37,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:56:37,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:37,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:56:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:37,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:56:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:37,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:37,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985246211] [2023-08-30 04:56:37,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985246211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:56:37,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:56:37,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 04:56:37,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726299925] [2023-08-30 04:56:37,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:56:37,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:56:37,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:37,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:56:37,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:56:39,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 476 [2023-08-30 04:56:39,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 44 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:39,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:39,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 476 [2023-08-30 04:56:39,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:40,212 INFO L130 PetriNetUnfolder]: 940/1638 cut-off events. [2023-08-30 04:56:40,212 INFO L131 PetriNetUnfolder]: For 1174/1174 co-relation queries the response was YES. [2023-08-30 04:56:40,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 1638 events. 940/1638 cut-off events. For 1174/1174 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8435 event pairs, 243 based on Foata normal form. 138/1719 useless extension candidates. Maximal degree in co-relation 4625. Up to 550 conditions per place. [2023-08-30 04:56:40,217 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 111 selfloop transitions, 8 changer transitions 0/120 dead transitions. [2023-08-30 04:56:40,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 706 flow [2023-08-30 04:56:40,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:56:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:56:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1669 transitions. [2023-08-30 04:56:40,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382878151260504 [2023-08-30 04:56:40,221 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1669 transitions. [2023-08-30 04:56:40,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1669 transitions. [2023-08-30 04:56:40,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:40,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1669 transitions. [2023-08-30 04:56:40,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 208.625) internal successors, (1669), 8 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:40,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:40,226 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:40,226 INFO L175 Difference]: Start difference. First operand has 68 places, 44 transitions, 220 flow. Second operand 8 states and 1669 transitions. [2023-08-30 04:56:40,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 706 flow [2023-08-30 04:56:40,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 120 transitions, 695 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 04:56:40,230 INFO L231 Difference]: Finished difference. Result has 75 places, 44 transitions, 238 flow [2023-08-30 04:56:40,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=238, PETRI_PLACES=75, PETRI_TRANSITIONS=44} [2023-08-30 04:56:40,230 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2023-08-30 04:56:40,230 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 238 flow [2023-08-30 04:56:40,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:40,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:40,231 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:40,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:40,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:40,435 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:40,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1101037495, now seen corresponding path program 1 times [2023-08-30 04:56:40,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:40,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687334288] [2023-08-30 04:56:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:40,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:40,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:40,437 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:40,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 04:56:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:40,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:56:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:40,696 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:56:40,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:56:40,741 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:56:40,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:56:40,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:56:40,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:56:40,805 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:56:40,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:56:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:40,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:56:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:41,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:41,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687334288] [2023-08-30 04:56:41,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687334288] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:56:41,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:56:41,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 04:56:41,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798397521] [2023-08-30 04:56:41,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:56:41,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:56:41,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:41,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:56:41,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:56:44,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:56:46,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:56:50,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:56:51,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 476 [2023-08-30 04:56:51,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 44 transitions, 238 flow. Second operand has 10 states, 10 states have (on average 190.6) internal successors, (1906), 10 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:51,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:51,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 476 [2023-08-30 04:56:51,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:52,753 INFO L130 PetriNetUnfolder]: 2097/3610 cut-off events. [2023-08-30 04:56:52,753 INFO L131 PetriNetUnfolder]: For 7872/7872 co-relation queries the response was YES. [2023-08-30 04:56:52,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10897 conditions, 3610 events. 2097/3610 cut-off events. For 7872/7872 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 18699 event pairs, 153 based on Foata normal form. 168/3638 useless extension candidates. Maximal degree in co-relation 10874. Up to 898 conditions per place. [2023-08-30 04:56:52,763 INFO L137 encePairwiseOnDemand]: 468/476 looper letters, 128 selfloop transitions, 9 changer transitions 0/137 dead transitions. [2023-08-30 04:56:52,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 137 transitions, 968 flow [2023-08-30 04:56:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:56:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:56:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1619 transitions. [2023-08-30 04:56:52,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251575630252101 [2023-08-30 04:56:52,766 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1619 transitions. [2023-08-30 04:56:52,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1619 transitions. [2023-08-30 04:56:52,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:52,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1619 transitions. [2023-08-30 04:56:52,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.375) internal successors, (1619), 8 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:52,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:52,771 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:52,771 INFO L175 Difference]: Start difference. First operand has 75 places, 44 transitions, 238 flow. Second operand 8 states and 1619 transitions. [2023-08-30 04:56:52,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 137 transitions, 968 flow [2023-08-30 04:56:52,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 137 transitions, 840 flow, removed 20 selfloop flow, removed 10 redundant places. [2023-08-30 04:56:52,775 INFO L231 Difference]: Finished difference. Result has 75 places, 47 transitions, 265 flow [2023-08-30 04:56:52,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=265, PETRI_PLACES=75, PETRI_TRANSITIONS=47} [2023-08-30 04:56:52,775 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2023-08-30 04:56:52,775 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 47 transitions, 265 flow [2023-08-30 04:56:52,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 190.6) internal successors, (1906), 10 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:52,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:52,776 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:52,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:52,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:52,984 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:52,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:52,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1101037354, now seen corresponding path program 1 times [2023-08-30 04:56:52,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:52,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46839830] [2023-08-30 04:56:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:56:52,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:52,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:52,986 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:52,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 04:56:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:56:53,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:56:53,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:53,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:56:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:53,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:56:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:53,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:53,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46839830] [2023-08-30 04:56:53,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46839830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:56:53,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:56:53,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 04:56:53,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48231562] [2023-08-30 04:56:53,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:56:53,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:56:53,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:56:53,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:56:55,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 476 [2023-08-30 04:56:55,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 47 transitions, 265 flow. Second operand has 10 states, 10 states have (on average 197.2) internal successors, (1972), 10 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:55,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:55,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 476 [2023-08-30 04:56:55,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:56,306 INFO L130 PetriNetUnfolder]: 1769/3170 cut-off events. [2023-08-30 04:56:56,306 INFO L131 PetriNetUnfolder]: For 4052/4052 co-relation queries the response was YES. [2023-08-30 04:56:56,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8736 conditions, 3170 events. 1769/3170 cut-off events. For 4052/4052 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 16594 event pairs, 231 based on Foata normal form. 168/3338 useless extension candidates. Maximal degree in co-relation 8713. Up to 691 conditions per place. [2023-08-30 04:56:56,315 INFO L137 encePairwiseOnDemand]: 468/476 looper letters, 120 selfloop transitions, 9 changer transitions 0/130 dead transitions. [2023-08-30 04:56:56,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 845 flow [2023-08-30 04:56:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:56:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:56:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1667 transitions. [2023-08-30 04:56:56,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377626050420168 [2023-08-30 04:56:56,318 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1667 transitions. [2023-08-30 04:56:56,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1667 transitions. [2023-08-30 04:56:56,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:56,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1667 transitions. [2023-08-30 04:56:56,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 208.375) internal successors, (1667), 8 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:56,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:56,322 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:56,322 INFO L175 Difference]: Start difference. First operand has 75 places, 47 transitions, 265 flow. Second operand 8 states and 1667 transitions. [2023-08-30 04:56:56,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 845 flow [2023-08-30 04:56:56,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 130 transitions, 830 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 04:56:56,327 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 273 flow [2023-08-30 04:56:56,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=273, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2023-08-30 04:56:56,327 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2023-08-30 04:56:56,327 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 273 flow [2023-08-30 04:56:56,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 197.2) internal successors, (1972), 10 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:56,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:56,328 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:56,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-08-30 04:56:56,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:56,536 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:56,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:56,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1146929846, now seen corresponding path program 2 times [2023-08-30 04:56:56,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:56,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103027837] [2023-08-30 04:56:56,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:56:56,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:56,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:56,538 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:56,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 04:56:56,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:56:56,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:56:56,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 04:56:56,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:56,729 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:56:56,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 04:56:56,763 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 04:56:56,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 04:56:56,822 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 04:56:56,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:56:56,832 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:56:56,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:56:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-30 04:56:56,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:56:56,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:56,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103027837] [2023-08-30 04:56:56,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103027837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:56:56,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:56:56,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:56:56,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179785635] [2023-08-30 04:56:56,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:56:56,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:56:56,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:56,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:56:56,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:56:57,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 476 [2023-08-30 04:56:57,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 47 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 195.2) internal successors, (976), 5 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:57,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:56:57,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 476 [2023-08-30 04:56:57,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:56:57,858 INFO L130 PetriNetUnfolder]: 1601/2849 cut-off events. [2023-08-30 04:56:57,858 INFO L131 PetriNetUnfolder]: For 3415/3415 co-relation queries the response was YES. [2023-08-30 04:56:57,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8289 conditions, 2849 events. 1601/2849 cut-off events. For 3415/3415 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 15150 event pairs, 1361 based on Foata normal form. 84/2931 useless extension candidates. Maximal degree in co-relation 8266. Up to 2766 conditions per place. [2023-08-30 04:56:57,865 INFO L137 encePairwiseOnDemand]: 471/476 looper letters, 41 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-08-30 04:56:57,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 45 transitions, 351 flow [2023-08-30 04:56:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:56:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:56:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 993 transitions. [2023-08-30 04:56:57,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41722689075630254 [2023-08-30 04:56:57,867 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 993 transitions. [2023-08-30 04:56:57,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 993 transitions. [2023-08-30 04:56:57,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:56:57,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 993 transitions. [2023-08-30 04:56:57,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 198.6) internal successors, (993), 5 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:57,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:57,870 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:57,870 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 273 flow. Second operand 5 states and 993 transitions. [2023-08-30 04:56:57,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 45 transitions, 351 flow [2023-08-30 04:56:57,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 45 transitions, 336 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 04:56:57,874 INFO L231 Difference]: Finished difference. Result has 73 places, 45 transitions, 254 flow [2023-08-30 04:56:57,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=73, PETRI_TRANSITIONS=45} [2023-08-30 04:56:57,874 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2023-08-30 04:56:57,874 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 45 transitions, 254 flow [2023-08-30 04:56:57,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.2) internal successors, (976), 5 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:56:57,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:56:57,875 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:56:57,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 04:56:58,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:58,082 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:56:58,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:56:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1146929888, now seen corresponding path program 2 times [2023-08-30 04:56:58,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:56:58,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796868978] [2023-08-30 04:56:58,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:56:58,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:56:58,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:56:58,083 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:56:58,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 04:56:58,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:56:58,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:56:58,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 04:56:58,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:56:58,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:56:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:58,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:56:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:56:58,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:56:58,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796868978] [2023-08-30 04:56:58,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796868978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:56:58,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:56:58,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-30 04:56:58,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942797642] [2023-08-30 04:56:58,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:56:58,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 04:56:58,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:56:58,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 04:56:58,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 04:57:04,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 476 [2023-08-30 04:57:04,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 45 transitions, 254 flow. Second operand has 16 states, 16 states have (on average 196.625) internal successors, (3146), 16 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:04,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:04,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 476 [2023-08-30 04:57:04,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:06,726 INFO L130 PetriNetUnfolder]: 3125/5443 cut-off events. [2023-08-30 04:57:06,727 INFO L131 PetriNetUnfolder]: For 6156/6156 co-relation queries the response was YES. [2023-08-30 04:57:06,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15326 conditions, 5443 events. 3125/5443 cut-off events. For 6156/6156 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 31511 event pairs, 441 based on Foata normal form. 504/5946 useless extension candidates. Maximal degree in co-relation 15303. Up to 1008 conditions per place. [2023-08-30 04:57:06,744 INFO L137 encePairwiseOnDemand]: 471/476 looper letters, 247 selfloop transitions, 13 changer transitions 0/261 dead transitions. [2023-08-30 04:57:06,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 261 transitions, 1840 flow [2023-08-30 04:57:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 04:57:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 04:57:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2922 transitions. [2023-08-30 04:57:06,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384753901560624 [2023-08-30 04:57:06,747 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2922 transitions. [2023-08-30 04:57:06,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2922 transitions. [2023-08-30 04:57:06,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:06,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2922 transitions. [2023-08-30 04:57:06,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 208.71428571428572) internal successors, (2922), 14 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:06,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 476.0) internal successors, (7140), 15 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:06,753 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 476.0) internal successors, (7140), 15 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:06,754 INFO L175 Difference]: Start difference. First operand has 73 places, 45 transitions, 254 flow. Second operand 14 states and 2922 transitions. [2023-08-30 04:57:06,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 261 transitions, 1840 flow [2023-08-30 04:57:06,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 261 transitions, 1835 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:57:06,762 INFO L231 Difference]: Finished difference. Result has 89 places, 51 transitions, 337 flow [2023-08-30 04:57:06,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=337, PETRI_PLACES=89, PETRI_TRANSITIONS=51} [2023-08-30 04:57:06,762 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2023-08-30 04:57:06,763 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 51 transitions, 337 flow [2023-08-30 04:57:06,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 196.625) internal successors, (3146), 16 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:06,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:06,763 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:06,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-08-30 04:57:06,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:06,965 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:06,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:06,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2063559614, now seen corresponding path program 1 times [2023-08-30 04:57:06,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:06,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803909726] [2023-08-30 04:57:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:57:06,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:06,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:06,967 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:06,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 04:57:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:57:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:07,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:07,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:07,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803909726] [2023-08-30 04:57:07,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803909726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:07,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:07,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:57:07,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446189579] [2023-08-30 04:57:07,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:07,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:57:07,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:07,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:57:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:57:07,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 476 [2023-08-30 04:57:07,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 51 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:07,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:07,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 476 [2023-08-30 04:57:07,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:08,104 INFO L130 PetriNetUnfolder]: 3193/5766 cut-off events. [2023-08-30 04:57:08,104 INFO L131 PetriNetUnfolder]: For 12310/12310 co-relation queries the response was YES. [2023-08-30 04:57:08,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18056 conditions, 5766 events. 3193/5766 cut-off events. For 12310/12310 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 35378 event pairs, 2145 based on Foata normal form. 4/5770 useless extension candidates. Maximal degree in co-relation 18027. Up to 4253 conditions per place. [2023-08-30 04:57:08,124 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 90 selfloop transitions, 5 changer transitions 2/98 dead transitions. [2023-08-30 04:57:08,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 98 transitions, 838 flow [2023-08-30 04:57:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:57:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:57:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1080 transitions. [2023-08-30 04:57:08,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453781512605042 [2023-08-30 04:57:08,126 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1080 transitions. [2023-08-30 04:57:08,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1080 transitions. [2023-08-30 04:57:08,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:08,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1080 transitions. [2023-08-30 04:57:08,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:08,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:08,128 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:08,128 INFO L175 Difference]: Start difference. First operand has 89 places, 51 transitions, 337 flow. Second operand 5 states and 1080 transitions. [2023-08-30 04:57:08,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 98 transitions, 838 flow [2023-08-30 04:57:08,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 98 transitions, 728 flow, removed 39 selfloop flow, removed 7 redundant places. [2023-08-30 04:57:08,140 INFO L231 Difference]: Finished difference. Result has 88 places, 52 transitions, 317 flow [2023-08-30 04:57:08,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=88, PETRI_TRANSITIONS=52} [2023-08-30 04:57:08,140 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2023-08-30 04:57:08,141 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 52 transitions, 317 flow [2023-08-30 04:57:08,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:08,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:08,141 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:08,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:08,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:08,342 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:08,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:08,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2104014344, now seen corresponding path program 2 times [2023-08-30 04:57:08,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:08,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000907646] [2023-08-30 04:57:08,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:57:08,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:08,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:08,343 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:08,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 04:57:08,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:57:08,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:08,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:57:08,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:08,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:08,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:08,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000907646] [2023-08-30 04:57:08,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000907646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:08,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:08,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:57:08,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512803437] [2023-08-30 04:57:08,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:08,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:57:08,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:08,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:57:08,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:57:08,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 476 [2023-08-30 04:57:08,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 52 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:08,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:08,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 476 [2023-08-30 04:57:08,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:09,674 INFO L130 PetriNetUnfolder]: 3768/6791 cut-off events. [2023-08-30 04:57:09,675 INFO L131 PetriNetUnfolder]: For 10717/10717 co-relation queries the response was YES. [2023-08-30 04:57:09,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20060 conditions, 6791 events. 3768/6791 cut-off events. For 10717/10717 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 43060 event pairs, 1888 based on Foata normal form. 46/6837 useless extension candidates. Maximal degree in co-relation 20029. Up to 5573 conditions per place. [2023-08-30 04:57:09,698 INFO L137 encePairwiseOnDemand]: 471/476 looper letters, 77 selfloop transitions, 4 changer transitions 3/85 dead transitions. [2023-08-30 04:57:09,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 85 transitions, 655 flow [2023-08-30 04:57:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:57:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:57:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 870 transitions. [2023-08-30 04:57:09,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4569327731092437 [2023-08-30 04:57:09,700 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 870 transitions. [2023-08-30 04:57:09,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 870 transitions. [2023-08-30 04:57:09,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:09,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 870 transitions. [2023-08-30 04:57:09,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:09,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:09,702 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:09,702 INFO L175 Difference]: Start difference. First operand has 88 places, 52 transitions, 317 flow. Second operand 4 states and 870 transitions. [2023-08-30 04:57:09,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 85 transitions, 655 flow [2023-08-30 04:57:09,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 85 transitions, 643 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:57:09,717 INFO L231 Difference]: Finished difference. Result has 91 places, 56 transitions, 364 flow [2023-08-30 04:57:09,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=91, PETRI_TRANSITIONS=56} [2023-08-30 04:57:09,718 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2023-08-30 04:57:09,718 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 56 transitions, 364 flow [2023-08-30 04:57:09,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:09,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:09,718 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:09,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:09,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:09,925 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:09,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:09,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1622943098, now seen corresponding path program 3 times [2023-08-30 04:57:09,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:09,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879806146] [2023-08-30 04:57:09,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:57:09,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:09,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:09,927 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:09,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 04:57:10,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 04:57:10,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:10,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:57:10,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:10,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:10,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:10,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879806146] [2023-08-30 04:57:10,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879806146] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:10,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:10,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:57:10,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306300906] [2023-08-30 04:57:10,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:10,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:57:10,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:10,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:57:10,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:57:10,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 476 [2023-08-30 04:57:10,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 56 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:10,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:10,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 476 [2023-08-30 04:57:10,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:11,170 INFO L130 PetriNetUnfolder]: 3653/6578 cut-off events. [2023-08-30 04:57:11,170 INFO L131 PetriNetUnfolder]: For 11798/11798 co-relation queries the response was YES. [2023-08-30 04:57:11,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19832 conditions, 6578 events. 3653/6578 cut-off events. For 11798/11798 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 40803 event pairs, 2359 based on Foata normal form. 46/6624 useless extension candidates. Maximal degree in co-relation 19799. Up to 4311 conditions per place. [2023-08-30 04:57:11,200 INFO L137 encePairwiseOnDemand]: 471/476 looper letters, 91 selfloop transitions, 7 changer transitions 3/102 dead transitions. [2023-08-30 04:57:11,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 102 transitions, 819 flow [2023-08-30 04:57:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:57:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:57:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 875 transitions. [2023-08-30 04:57:11,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45955882352941174 [2023-08-30 04:57:11,203 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 875 transitions. [2023-08-30 04:57:11,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 875 transitions. [2023-08-30 04:57:11,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:11,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 875 transitions. [2023-08-30 04:57:11,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:11,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:11,205 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:11,205 INFO L175 Difference]: Start difference. First operand has 91 places, 56 transitions, 364 flow. Second operand 4 states and 875 transitions. [2023-08-30 04:57:11,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 102 transitions, 819 flow [2023-08-30 04:57:11,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 102 transitions, 815 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 04:57:11,227 INFO L231 Difference]: Finished difference. Result has 95 places, 57 transitions, 394 flow [2023-08-30 04:57:11,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=394, PETRI_PLACES=95, PETRI_TRANSITIONS=57} [2023-08-30 04:57:11,227 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2023-08-30 04:57:11,228 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 57 transitions, 394 flow [2023-08-30 04:57:11,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:11,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:11,228 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:11,235 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 (28)] Ended with exit code 0 [2023-08-30 04:57:11,428 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 [2023-08-30 04:57:11,428 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:11,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:11,429 INFO L85 PathProgramCache]: Analyzing trace with hash -37939586, now seen corresponding path program 1 times [2023-08-30 04:57:11,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:11,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89652013] [2023-08-30 04:57:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:57:11,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:11,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:11,430 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) [2023-08-30 04:57:11,431 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 [2023-08-30 04:57:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 04:57:11,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:11,934 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:57:11,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:57:11,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:57:11,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:57:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:11,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:11,987 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:11,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89652013] [2023-08-30 04:57:11,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89652013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:11,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:11,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:11,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699103488] [2023-08-30 04:57:11,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:11,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:11,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:11,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:11,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:13,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 476 [2023-08-30 04:57:13,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 57 transitions, 394 flow. Second operand has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:13,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:13,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 476 [2023-08-30 04:57:13,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:14,639 INFO L130 PetriNetUnfolder]: 3992/7178 cut-off events. [2023-08-30 04:57:14,640 INFO L131 PetriNetUnfolder]: For 13836/13836 co-relation queries the response was YES. [2023-08-30 04:57:14,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21888 conditions, 7178 events. 3992/7178 cut-off events. For 13836/13836 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 45719 event pairs, 2357 based on Foata normal form. 5/7183 useless extension candidates. Maximal degree in co-relation 21853. Up to 4310 conditions per place. [2023-08-30 04:57:14,671 INFO L137 encePairwiseOnDemand]: 464/476 looper letters, 125 selfloop transitions, 14 changer transitions 10/150 dead transitions. [2023-08-30 04:57:14,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 150 transitions, 1179 flow [2023-08-30 04:57:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:57:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:57:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1729 transitions. [2023-08-30 04:57:14,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035947712418301 [2023-08-30 04:57:14,674 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1729 transitions. [2023-08-30 04:57:14,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1729 transitions. [2023-08-30 04:57:14,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:14,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1729 transitions. [2023-08-30 04:57:14,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.11111111111111) internal successors, (1729), 9 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:14,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:14,678 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:14,678 INFO L175 Difference]: Start difference. First operand has 95 places, 57 transitions, 394 flow. Second operand 9 states and 1729 transitions. [2023-08-30 04:57:14,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 150 transitions, 1179 flow [2023-08-30 04:57:14,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 150 transitions, 1163 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 04:57:14,699 INFO L231 Difference]: Finished difference. Result has 105 places, 65 transitions, 474 flow [2023-08-30 04:57:14,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=474, PETRI_PLACES=105, PETRI_TRANSITIONS=65} [2023-08-30 04:57:14,699 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2023-08-30 04:57:14,699 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 65 transitions, 474 flow [2023-08-30 04:57:14,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:14,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:14,700 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:14,709 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 [2023-08-30 04:57:14,903 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 [2023-08-30 04:57:14,903 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:14,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:14,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1165404606, now seen corresponding path program 2 times [2023-08-30 04:57:14,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:14,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598673749] [2023-08-30 04:57:14,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:57:14,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:14,905 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) [2023-08-30 04:57:14,905 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 [2023-08-30 04:57:15,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:57:15,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:15,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:57:15,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:15,232 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 04:57:15,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 145 [2023-08-30 04:57:15,240 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 04:57:15,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 137 [2023-08-30 04:57:15,485 INFO L321 Elim1Store]: treesize reduction 28, result has 71.1 percent of original size [2023-08-30 04:57:15,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 181 treesize of output 137 [2023-08-30 04:57:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:15,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:15,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:15,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598673749] [2023-08-30 04:57:15,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598673749] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:15,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:15,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:15,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103552072] [2023-08-30 04:57:15,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:15,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:15,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:15,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:15,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:16,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 476 [2023-08-30 04:57:16,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 65 transitions, 474 flow. Second operand has 11 states, 11 states have (on average 185.72727272727272) internal successors, (2043), 11 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:16,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:16,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 476 [2023-08-30 04:57:16,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:18,366 INFO L130 PetriNetUnfolder]: 4002/7206 cut-off events. [2023-08-30 04:57:18,366 INFO L131 PetriNetUnfolder]: For 17894/17896 co-relation queries the response was YES. [2023-08-30 04:57:18,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25380 conditions, 7206 events. 4002/7206 cut-off events. For 17894/17896 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45557 event pairs, 2437 based on Foata normal form. 3/7209 useless extension candidates. Maximal degree in co-relation 25340. Up to 4310 conditions per place. [2023-08-30 04:57:18,407 INFO L137 encePairwiseOnDemand]: 464/476 looper letters, 97 selfloop transitions, 17 changer transitions 7/122 dead transitions. [2023-08-30 04:57:18,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 122 transitions, 1040 flow [2023-08-30 04:57:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:57:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:57:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1726 transitions. [2023-08-30 04:57:18,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40289449112978526 [2023-08-30 04:57:18,410 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1726 transitions. [2023-08-30 04:57:18,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1726 transitions. [2023-08-30 04:57:18,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:18,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1726 transitions. [2023-08-30 04:57:18,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.77777777777777) internal successors, (1726), 9 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:18,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:18,414 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:18,414 INFO L175 Difference]: Start difference. First operand has 105 places, 65 transitions, 474 flow. Second operand 9 states and 1726 transitions. [2023-08-30 04:57:18,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 122 transitions, 1040 flow [2023-08-30 04:57:18,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 122 transitions, 1017 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-30 04:57:18,475 INFO L231 Difference]: Finished difference. Result has 112 places, 71 transitions, 561 flow [2023-08-30 04:57:18,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=561, PETRI_PLACES=112, PETRI_TRANSITIONS=71} [2023-08-30 04:57:18,475 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2023-08-30 04:57:18,476 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 71 transitions, 561 flow [2023-08-30 04:57:18,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 185.72727272727272) internal successors, (2043), 11 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:18,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:18,476 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:18,483 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 (30)] Ended with exit code 0 [2023-08-30 04:57:18,683 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 [2023-08-30 04:57:18,684 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:18,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1759256522, now seen corresponding path program 3 times [2023-08-30 04:57:18,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:18,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658624221] [2023-08-30 04:57:18,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:57:18,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:18,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:18,686 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) [2023-08-30 04:57:18,687 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 [2023-08-30 04:57:18,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 04:57:18,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:18,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:57:18,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:19,166 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:57:19,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:57:19,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:57:19,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:57:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:19,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:19,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:19,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658624221] [2023-08-30 04:57:19,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658624221] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:19,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:19,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:19,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823580871] [2023-08-30 04:57:19,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:19,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:19,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:19,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:20,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 476 [2023-08-30 04:57:20,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 71 transitions, 561 flow. Second operand has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:20,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:20,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 476 [2023-08-30 04:57:20,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:22,141 INFO L130 PetriNetUnfolder]: 4005/7221 cut-off events. [2023-08-30 04:57:22,141 INFO L131 PetriNetUnfolder]: For 20208/20210 co-relation queries the response was YES. [2023-08-30 04:57:22,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26208 conditions, 7221 events. 4005/7221 cut-off events. For 20208/20210 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45873 event pairs, 2361 based on Foata normal form. 9/7230 useless extension candidates. Maximal degree in co-relation 26166. Up to 4310 conditions per place. [2023-08-30 04:57:22,181 INFO L137 encePairwiseOnDemand]: 464/476 looper letters, 120 selfloop transitions, 18 changer transitions 5/144 dead transitions. [2023-08-30 04:57:22,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 144 transitions, 1253 flow [2023-08-30 04:57:22,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:57:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:57:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1728 transitions. [2023-08-30 04:57:22,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40336134453781514 [2023-08-30 04:57:22,183 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1728 transitions. [2023-08-30 04:57:22,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1728 transitions. [2023-08-30 04:57:22,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:22,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1728 transitions. [2023-08-30 04:57:22,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.0) internal successors, (1728), 9 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:22,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:22,187 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:22,187 INFO L175 Difference]: Start difference. First operand has 112 places, 71 transitions, 561 flow. Second operand 9 states and 1728 transitions. [2023-08-30 04:57:22,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 144 transitions, 1253 flow [2023-08-30 04:57:22,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 144 transitions, 1207 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-08-30 04:57:22,247 INFO L231 Difference]: Finished difference. Result has 116 places, 73 transitions, 596 flow [2023-08-30 04:57:22,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=596, PETRI_PLACES=116, PETRI_TRANSITIONS=73} [2023-08-30 04:57:22,248 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2023-08-30 04:57:22,248 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 73 transitions, 596 flow [2023-08-30 04:57:22,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:22,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:22,248 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:22,256 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 [2023-08-30 04:57:22,456 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 [2023-08-30 04:57:22,456 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:22,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash -512503172, now seen corresponding path program 4 times [2023-08-30 04:57:22,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:22,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622472683] [2023-08-30 04:57:22,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 04:57:22,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:22,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:22,458 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) [2023-08-30 04:57:22,458 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 [2023-08-30 04:57:22,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 04:57:22,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:22,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 04:57:22,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:22,928 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:57:22,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:57:22,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:57:22,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:57:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:22,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:22,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:22,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622472683] [2023-08-30 04:57:22,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622472683] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:22,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:22,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:22,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892038061] [2023-08-30 04:57:22,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:22,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:22,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:24,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 476 [2023-08-30 04:57:24,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 73 transitions, 596 flow. Second operand has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:24,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:24,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 476 [2023-08-30 04:57:24,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:25,693 INFO L130 PetriNetUnfolder]: 4002/7212 cut-off events. [2023-08-30 04:57:25,693 INFO L131 PetriNetUnfolder]: For 24089/24091 co-relation queries the response was YES. [2023-08-30 04:57:25,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27725 conditions, 7212 events. 4002/7212 cut-off events. For 24089/24091 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45871 event pairs, 2409 based on Foata normal form. 3/7215 useless extension candidates. Maximal degree in co-relation 27681. Up to 4310 conditions per place. [2023-08-30 04:57:25,733 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 112 selfloop transitions, 16 changer transitions 13/142 dead transitions. [2023-08-30 04:57:25,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 142 transitions, 1286 flow [2023-08-30 04:57:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:57:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:57:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1724 transitions. [2023-08-30 04:57:25,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024276377217554 [2023-08-30 04:57:25,735 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1724 transitions. [2023-08-30 04:57:25,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1724 transitions. [2023-08-30 04:57:25,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:25,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1724 transitions. [2023-08-30 04:57:25,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.55555555555554) internal successors, (1724), 9 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:25,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:25,739 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:25,739 INFO L175 Difference]: Start difference. First operand has 116 places, 73 transitions, 596 flow. Second operand 9 states and 1724 transitions. [2023-08-30 04:57:25,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 142 transitions, 1286 flow [2023-08-30 04:57:25,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 142 transitions, 1248 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-30 04:57:25,810 INFO L231 Difference]: Finished difference. Result has 120 places, 71 transitions, 577 flow [2023-08-30 04:57:25,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=577, PETRI_PLACES=120, PETRI_TRANSITIONS=71} [2023-08-30 04:57:25,811 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2023-08-30 04:57:25,811 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 71 transitions, 577 flow [2023-08-30 04:57:25,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:25,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:25,811 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:25,820 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 [2023-08-30 04:57:26,020 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 [2023-08-30 04:57:26,020 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:26,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:26,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1796124574, now seen corresponding path program 5 times [2023-08-30 04:57:26,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:26,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335651887] [2023-08-30 04:57:26,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 04:57:26,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:26,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:26,022 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) [2023-08-30 04:57:26,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-08-30 04:57:26,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 04:57:26,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:26,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 04:57:26,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:26,621 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:57:26,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:57:26,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:57:26,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:57:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:26,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:26,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:26,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335651887] [2023-08-30 04:57:26,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335651887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:26,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:26,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:26,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401532379] [2023-08-30 04:57:26,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:26,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:26,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:26,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:26,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:27,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 476 [2023-08-30 04:57:27,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 71 transitions, 577 flow. Second operand has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:27,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:27,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 476 [2023-08-30 04:57:27,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:29,463 INFO L130 PetriNetUnfolder]: 4003/7219 cut-off events. [2023-08-30 04:57:29,463 INFO L131 PetriNetUnfolder]: For 27281/27283 co-relation queries the response was YES. [2023-08-30 04:57:29,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29069 conditions, 7219 events. 4003/7219 cut-off events. For 27281/27283 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45805 event pairs, 2487 based on Foata normal form. 9/7228 useless extension candidates. Maximal degree in co-relation 29024. Up to 4310 conditions per place. [2023-08-30 04:57:29,496 INFO L137 encePairwiseOnDemand]: 464/476 looper letters, 103 selfloop transitions, 17 changer transitions 5/126 dead transitions. [2023-08-30 04:57:29,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 126 transitions, 1144 flow [2023-08-30 04:57:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:57:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:57:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1722 transitions. [2023-08-30 04:57:29,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019607843137255 [2023-08-30 04:57:29,499 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1722 transitions. [2023-08-30 04:57:29,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1722 transitions. [2023-08-30 04:57:29,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:29,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1722 transitions. [2023-08-30 04:57:29,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.33333333333334) internal successors, (1722), 9 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:29,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:29,503 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:29,503 INFO L175 Difference]: Start difference. First operand has 120 places, 71 transitions, 577 flow. Second operand 9 states and 1722 transitions. [2023-08-30 04:57:29,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 126 transitions, 1144 flow [2023-08-30 04:57:29,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 126 transitions, 1069 flow, removed 18 selfloop flow, removed 10 redundant places. [2023-08-30 04:57:29,566 INFO L231 Difference]: Finished difference. Result has 116 places, 72 transitions, 583 flow [2023-08-30 04:57:29,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=583, PETRI_PLACES=116, PETRI_TRANSITIONS=72} [2023-08-30 04:57:29,566 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2023-08-30 04:57:29,566 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 72 transitions, 583 flow [2023-08-30 04:57:29,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:29,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:29,567 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:29,575 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 [2023-08-30 04:57:29,767 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 [2023-08-30 04:57:29,767 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:29,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:29,767 INFO L85 PathProgramCache]: Analyzing trace with hash -549371224, now seen corresponding path program 6 times [2023-08-30 04:57:29,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:29,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105434382] [2023-08-30 04:57:29,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 04:57:29,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:29,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:29,769 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) [2023-08-30 04:57:29,769 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 [2023-08-30 04:57:29,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 04:57:29,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:29,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:57:29,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:30,135 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:57:30,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:57:30,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:57:30,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:57:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:30,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:30,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:30,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105434382] [2023-08-30 04:57:30,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105434382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:30,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:30,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:30,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799125561] [2023-08-30 04:57:30,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:30,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:30,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:30,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:30,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:31,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 476 [2023-08-30 04:57:31,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 72 transitions, 583 flow. Second operand has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:31,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:31,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 476 [2023-08-30 04:57:31,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:32,686 INFO L130 PetriNetUnfolder]: 4000/7210 cut-off events. [2023-08-30 04:57:32,686 INFO L131 PetriNetUnfolder]: For 24055/24057 co-relation queries the response was YES. [2023-08-30 04:57:32,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27846 conditions, 7210 events. 4000/7210 cut-off events. For 24055/24057 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45655 event pairs, 2439 based on Foata normal form. 3/7213 useless extension candidates. Maximal degree in co-relation 27802. Up to 4310 conditions per place. [2023-08-30 04:57:32,724 INFO L137 encePairwiseOnDemand]: 464/476 looper letters, 96 selfloop transitions, 15 changer transitions 12/124 dead transitions. [2023-08-30 04:57:32,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 124 transitions, 1130 flow [2023-08-30 04:57:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:57:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:57:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1718 transitions. [2023-08-30 04:57:32,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40102707749766575 [2023-08-30 04:57:32,726 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1718 transitions. [2023-08-30 04:57:32,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1718 transitions. [2023-08-30 04:57:32,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:32,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1718 transitions. [2023-08-30 04:57:32,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 190.88888888888889) internal successors, (1718), 9 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:32,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:32,730 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:32,730 INFO L175 Difference]: Start difference. First operand has 116 places, 72 transitions, 583 flow. Second operand 9 states and 1718 transitions. [2023-08-30 04:57:32,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 124 transitions, 1130 flow [2023-08-30 04:57:32,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 124 transitions, 1083 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-30 04:57:32,779 INFO L231 Difference]: Finished difference. Result has 118 places, 70 transitions, 555 flow [2023-08-30 04:57:32,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=555, PETRI_PLACES=118, PETRI_TRANSITIONS=70} [2023-08-30 04:57:32,779 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2023-08-30 04:57:32,780 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 70 transitions, 555 flow [2023-08-30 04:57:32,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:32,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:32,780 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:32,787 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 [2023-08-30 04:57:32,984 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 [2023-08-30 04:57:32,985 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:32,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash 445513020, now seen corresponding path program 7 times [2023-08-30 04:57:32,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:32,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124084633] [2023-08-30 04:57:32,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 04:57:32,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:32,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:32,986 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) [2023-08-30 04:57:32,988 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 [2023-08-30 04:57:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:33,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 04:57:33,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:33,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:33,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 04:57:33,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:33,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 04:57:33,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:33,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 04:57:33,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:33,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 04:57:33,673 INFO L321 Elim1Store]: treesize reduction 28, result has 71.1 percent of original size [2023-08-30 04:57:33,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 181 treesize of output 137 [2023-08-30 04:57:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:33,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:33,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:33,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124084633] [2023-08-30 04:57:33,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124084633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:33,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:33,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:33,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674203945] [2023-08-30 04:57:33,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:33,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:33,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:33,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:33,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:35,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 476 [2023-08-30 04:57:35,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 70 transitions, 555 flow. Second operand has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:35,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:35,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 476 [2023-08-30 04:57:35,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:37,069 INFO L130 PetriNetUnfolder]: 4000/7200 cut-off events. [2023-08-30 04:57:37,069 INFO L131 PetriNetUnfolder]: For 26402/26404 co-relation queries the response was YES. [2023-08-30 04:57:37,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28850 conditions, 7200 events. 4000/7200 cut-off events. For 26402/26404 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 45557 event pairs, 2450 based on Foata normal form. 1/7201 useless extension candidates. Maximal degree in co-relation 28806. Up to 4310 conditions per place. [2023-08-30 04:57:37,111 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 108 selfloop transitions, 16 changer transitions 7/132 dead transitions. [2023-08-30 04:57:37,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 132 transitions, 1213 flow [2023-08-30 04:57:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:57:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:57:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1723 transitions. [2023-08-30 04:57:37,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40219421101774044 [2023-08-30 04:57:37,113 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1723 transitions. [2023-08-30 04:57:37,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1723 transitions. [2023-08-30 04:57:37,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:37,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1723 transitions. [2023-08-30 04:57:37,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.44444444444446) internal successors, (1723), 9 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:37,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:37,117 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:37,117 INFO L175 Difference]: Start difference. First operand has 118 places, 70 transitions, 555 flow. Second operand 9 states and 1723 transitions. [2023-08-30 04:57:37,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 132 transitions, 1213 flow [2023-08-30 04:57:37,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 132 transitions, 1139 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-30 04:57:37,182 INFO L231 Difference]: Finished difference. Result has 119 places, 77 transitions, 660 flow [2023-08-30 04:57:37,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=660, PETRI_PLACES=119, PETRI_TRANSITIONS=77} [2023-08-30 04:57:37,182 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2023-08-30 04:57:37,182 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 77 transitions, 660 flow [2023-08-30 04:57:37,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:37,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:37,183 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:37,194 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 (35)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:37,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:37,383 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:37,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:37,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1579365720, now seen corresponding path program 8 times [2023-08-30 04:57:37,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:37,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215668073] [2023-08-30 04:57:37,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:57:37,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:37,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:37,385 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:37,385 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 (36)] Waiting until timeout for monitored process [2023-08-30 04:57:37,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:57:37,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:37,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:57:37,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:37,828 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:57:37,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:57:37,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:57:37,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:57:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:37,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:37,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:37,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215668073] [2023-08-30 04:57:37,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215668073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:37,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:37,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:37,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468702774] [2023-08-30 04:57:37,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:37,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:37,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:37,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:37,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:38,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 476 [2023-08-30 04:57:38,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 77 transitions, 660 flow. Second operand has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:38,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:38,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 476 [2023-08-30 04:57:38,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:40,345 INFO L130 PetriNetUnfolder]: 3991/7199 cut-off events. [2023-08-30 04:57:40,345 INFO L131 PetriNetUnfolder]: For 25060/25062 co-relation queries the response was YES. [2023-08-30 04:57:40,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27867 conditions, 7199 events. 3991/7199 cut-off events. For 25060/25062 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45592 event pairs, 2456 based on Foata normal form. 7/7206 useless extension candidates. Maximal degree in co-relation 27820. Up to 4310 conditions per place. [2023-08-30 04:57:40,378 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 104 selfloop transitions, 19 changer transitions 5/129 dead transitions. [2023-08-30 04:57:40,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 129 transitions, 1201 flow [2023-08-30 04:57:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:57:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:57:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1725 transitions. [2023-08-30 04:57:40,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026610644257703 [2023-08-30 04:57:40,380 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1725 transitions. [2023-08-30 04:57:40,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1725 transitions. [2023-08-30 04:57:40,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:40,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1725 transitions. [2023-08-30 04:57:40,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.66666666666666) internal successors, (1725), 9 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:40,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:40,384 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:40,384 INFO L175 Difference]: Start difference. First operand has 119 places, 77 transitions, 660 flow. Second operand 9 states and 1725 transitions. [2023-08-30 04:57:40,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 129 transitions, 1201 flow [2023-08-30 04:57:40,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 129 transitions, 1161 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-30 04:57:40,435 INFO L231 Difference]: Finished difference. Result has 126 places, 82 transitions, 759 flow [2023-08-30 04:57:40,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=759, PETRI_PLACES=126, PETRI_TRANSITIONS=82} [2023-08-30 04:57:40,436 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2023-08-30 04:57:40,436 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 82 transitions, 759 flow [2023-08-30 04:57:40,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:40,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:40,436 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:40,444 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 (36)] Ended with exit code 0 [2023-08-30 04:57:40,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:40,637 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:40,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:40,637 INFO L85 PathProgramCache]: Analyzing trace with hash 475039614, now seen corresponding path program 9 times [2023-08-30 04:57:40,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:40,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346731458] [2023-08-30 04:57:40,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:57:40,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:40,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:40,638 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:40,639 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 (37)] Waiting until timeout for monitored process [2023-08-30 04:57:40,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 04:57:40,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:57:40,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:40,976 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 04:57:40,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 145 [2023-08-30 04:57:40,988 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 04:57:40,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 137 [2023-08-30 04:57:41,244 INFO L321 Elim1Store]: treesize reduction 28, result has 71.1 percent of original size [2023-08-30 04:57:41,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 181 treesize of output 137 [2023-08-30 04:57:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:41,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:41,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:41,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346731458] [2023-08-30 04:57:41,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346731458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:41,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:41,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:41,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356510889] [2023-08-30 04:57:41,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:41,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:41,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:41,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:41,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:42,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 476 [2023-08-30 04:57:42,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 82 transitions, 759 flow. Second operand has 11 states, 11 states have (on average 185.72727272727272) internal successors, (2043), 11 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:42,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:42,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 476 [2023-08-30 04:57:42,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:44,077 INFO L130 PetriNetUnfolder]: 3988/7196 cut-off events. [2023-08-30 04:57:44,077 INFO L131 PetriNetUnfolder]: For 24823/24825 co-relation queries the response was YES. [2023-08-30 04:57:44,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26956 conditions, 7196 events. 3988/7196 cut-off events. For 24823/24825 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45663 event pairs, 2542 based on Foata normal form. 1/7197 useless extension candidates. Maximal degree in co-relation 26906. Up to 4310 conditions per place. [2023-08-30 04:57:44,116 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 99 selfloop transitions, 20 changer transitions 7/127 dead transitions. [2023-08-30 04:57:44,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 127 transitions, 1253 flow [2023-08-30 04:57:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:57:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:57:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1729 transitions. [2023-08-30 04:57:44,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035947712418301 [2023-08-30 04:57:44,119 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1729 transitions. [2023-08-30 04:57:44,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1729 transitions. [2023-08-30 04:57:44,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:44,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1729 transitions. [2023-08-30 04:57:44,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.11111111111111) internal successors, (1729), 9 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:44,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:44,123 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:44,124 INFO L175 Difference]: Start difference. First operand has 126 places, 82 transitions, 759 flow. Second operand 9 states and 1729 transitions. [2023-08-30 04:57:44,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 127 transitions, 1253 flow [2023-08-30 04:57:44,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 127 transitions, 1213 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-30 04:57:44,198 INFO L231 Difference]: Finished difference. Result has 132 places, 84 transitions, 801 flow [2023-08-30 04:57:44,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=801, PETRI_PLACES=132, PETRI_TRANSITIONS=84} [2023-08-30 04:57:44,199 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2023-08-30 04:57:44,199 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 84 transitions, 801 flow [2023-08-30 04:57:44,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 185.72727272727272) internal successors, (2043), 11 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:44,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:44,200 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:44,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:44,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:44,400 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:44,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:44,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1239736216, now seen corresponding path program 10 times [2023-08-30 04:57:44,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:44,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979680701] [2023-08-30 04:57:44,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 04:57:44,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:44,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:44,402 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:44,402 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 (38)] Waiting until timeout for monitored process [2023-08-30 04:57:44,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 04:57:44,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:44,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 04:57:44,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:44,865 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:57:44,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:57:44,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:57:44,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:57:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:44,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:44,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:44,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979680701] [2023-08-30 04:57:44,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979680701] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:44,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:44,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:44,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175981432] [2023-08-30 04:57:44,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:44,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:44,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:44,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:45,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 476 [2023-08-30 04:57:45,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 84 transitions, 801 flow. Second operand has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:45,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:45,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 476 [2023-08-30 04:57:45,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:47,248 INFO L130 PetriNetUnfolder]: 3986/7186 cut-off events. [2023-08-30 04:57:47,249 INFO L131 PetriNetUnfolder]: For 23955/23957 co-relation queries the response was YES. [2023-08-30 04:57:47,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26773 conditions, 7186 events. 3986/7186 cut-off events. For 23955/23957 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45539 event pairs, 2544 based on Foata normal form. 1/7187 useless extension candidates. Maximal degree in co-relation 26721. Up to 4310 conditions per place. [2023-08-30 04:57:47,291 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 97 selfloop transitions, 18 changer transitions 12/128 dead transitions. [2023-08-30 04:57:47,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 128 transitions, 1269 flow [2023-08-30 04:57:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:57:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:57:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1721 transitions. [2023-08-30 04:57:47,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40172735760971057 [2023-08-30 04:57:47,293 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1721 transitions. [2023-08-30 04:57:47,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1721 transitions. [2023-08-30 04:57:47,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:47,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1721 transitions. [2023-08-30 04:57:47,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.22222222222223) internal successors, (1721), 9 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:47,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:47,297 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:47,297 INFO L175 Difference]: Start difference. First operand has 132 places, 84 transitions, 801 flow. Second operand 9 states and 1721 transitions. [2023-08-30 04:57:47,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 128 transitions, 1269 flow [2023-08-30 04:57:47,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 128 transitions, 1213 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-08-30 04:57:47,365 INFO L231 Difference]: Finished difference. Result has 133 places, 82 transitions, 763 flow [2023-08-30 04:57:47,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=763, PETRI_PLACES=133, PETRI_TRANSITIONS=82} [2023-08-30 04:57:47,365 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2023-08-30 04:57:47,365 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 82 transitions, 763 flow [2023-08-30 04:57:47,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:47,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:47,366 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:47,376 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 (38)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:47,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:47,566 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:47,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:47,567 INFO L85 PathProgramCache]: Analyzing trace with hash -195766018, now seen corresponding path program 11 times [2023-08-30 04:57:47,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:47,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917088037] [2023-08-30 04:57:47,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 04:57:47,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:47,568 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:47,568 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 (39)] Waiting until timeout for monitored process [2023-08-30 04:57:47,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 04:57:47,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:47,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 04:57:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:47,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:47,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 04:57:47,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:47,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 04:57:47,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:47,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 04:57:48,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:48,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 04:57:48,422 INFO L321 Elim1Store]: treesize reduction 28, result has 71.1 percent of original size [2023-08-30 04:57:48,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 181 treesize of output 137 [2023-08-30 04:57:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:48,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:48,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:48,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917088037] [2023-08-30 04:57:48,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917088037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:48,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:48,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:48,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629428872] [2023-08-30 04:57:48,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:48,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:48,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:48,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:49,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 476 [2023-08-30 04:57:49,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 82 transitions, 763 flow. Second operand has 11 states, 11 states have (on average 185.72727272727272) internal successors, (2043), 11 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:49,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:49,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 476 [2023-08-30 04:57:49,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:51,809 INFO L130 PetriNetUnfolder]: 3989/7141 cut-off events. [2023-08-30 04:57:51,809 INFO L131 PetriNetUnfolder]: For 24862/24864 co-relation queries the response was YES. [2023-08-30 04:57:51,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26756 conditions, 7141 events. 3989/7141 cut-off events. For 24862/24864 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 45201 event pairs, 2950 based on Foata normal form. 1/7142 useless extension candidates. Maximal degree in co-relation 26704. Up to 6446 conditions per place. [2023-08-30 04:57:51,854 INFO L137 encePairwiseOnDemand]: 464/476 looper letters, 120 selfloop transitions, 19 changer transitions 7/147 dead transitions. [2023-08-30 04:57:51,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 147 transitions, 1524 flow [2023-08-30 04:57:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 04:57:51,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 04:57:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1914 transitions. [2023-08-30 04:57:51,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40210084033613447 [2023-08-30 04:57:51,857 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1914 transitions. [2023-08-30 04:57:51,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1914 transitions. [2023-08-30 04:57:51,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:51,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1914 transitions. [2023-08-30 04:57:51,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 191.4) internal successors, (1914), 10 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:51,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:51,861 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:51,861 INFO L175 Difference]: Start difference. First operand has 133 places, 82 transitions, 763 flow. Second operand 10 states and 1914 transitions. [2023-08-30 04:57:51,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 147 transitions, 1524 flow [2023-08-30 04:57:51,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 147 transitions, 1458 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-08-30 04:57:51,919 INFO L231 Difference]: Finished difference. Result has 134 places, 87 transitions, 858 flow [2023-08-30 04:57:51,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=858, PETRI_PLACES=134, PETRI_TRANSITIONS=87} [2023-08-30 04:57:51,919 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2023-08-30 04:57:51,919 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 87 transitions, 858 flow [2023-08-30 04:57:51,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 185.72727272727272) internal successors, (2043), 11 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:51,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:51,920 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:51,929 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 (39)] Ended with exit code 0 [2023-08-30 04:57:52,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:52,121 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:52,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:52,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1642516196, now seen corresponding path program 12 times [2023-08-30 04:57:52,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:52,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063047223] [2023-08-30 04:57:52,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 04:57:52,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:52,122 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:52,123 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 (40)] Waiting until timeout for monitored process [2023-08-30 04:57:52,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 04:57:52,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:57:52,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:57:52,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:52,596 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:57:52,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:57:52,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:57:52,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:57:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:52,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:52,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:52,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063047223] [2023-08-30 04:57:52,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063047223] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:52,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:52,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:52,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696840667] [2023-08-30 04:57:52,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:52,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:52,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:52,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:52,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:53,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 476 [2023-08-30 04:57:53,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 87 transitions, 858 flow. Second operand has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:53,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:53,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 476 [2023-08-30 04:57:53,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:57:55,081 INFO L130 PetriNetUnfolder]: 3980/7132 cut-off events. [2023-08-30 04:57:55,081 INFO L131 PetriNetUnfolder]: For 28294/28296 co-relation queries the response was YES. [2023-08-30 04:57:55,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28361 conditions, 7132 events. 3980/7132 cut-off events. For 28294/28296 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 45106 event pairs, 2924 based on Foata normal form. 7/7139 useless extension candidates. Maximal degree in co-relation 28307. Up to 6441 conditions per place. [2023-08-30 04:57:55,127 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 107 selfloop transitions, 22 changer transitions 5/135 dead transitions. [2023-08-30 04:57:55,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 135 transitions, 1426 flow [2023-08-30 04:57:55,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:57:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:57:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1721 transitions. [2023-08-30 04:57:55,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40172735760971057 [2023-08-30 04:57:55,129 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1721 transitions. [2023-08-30 04:57:55,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1721 transitions. [2023-08-30 04:57:55,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:57:55,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1721 transitions. [2023-08-30 04:57:55,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.22222222222223) internal successors, (1721), 9 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:55,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:55,133 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:55,133 INFO L175 Difference]: Start difference. First operand has 134 places, 87 transitions, 858 flow. Second operand 9 states and 1721 transitions. [2023-08-30 04:57:55,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 135 transitions, 1426 flow [2023-08-30 04:57:55,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 135 transitions, 1370 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-30 04:57:55,216 INFO L231 Difference]: Finished difference. Result has 141 places, 95 transitions, 1016 flow [2023-08-30 04:57:55,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1016, PETRI_PLACES=141, PETRI_TRANSITIONS=95} [2023-08-30 04:57:55,216 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2023-08-30 04:57:55,216 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 95 transitions, 1016 flow [2023-08-30 04:57:55,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:55,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:57:55,217 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:57:55,227 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 (40)] Forceful destruction successful, exit code 0 [2023-08-30 04:57:55,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:55,425 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:57:55,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:57:55,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1518598400, now seen corresponding path program 13 times [2023-08-30 04:57:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:57:55,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858041955] [2023-08-30 04:57:55,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 04:57:55,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:57:55,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:57:55,427 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:57:55,428 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 (41)] Waiting until timeout for monitored process [2023-08-30 04:57:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:57:55,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 04:57:55,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:57:55,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:55,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 04:57:55,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:55,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 04:57:55,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:55,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 04:57:55,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:57:55,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 04:57:56,145 INFO L321 Elim1Store]: treesize reduction 28, result has 71.1 percent of original size [2023-08-30 04:57:56,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 181 treesize of output 137 [2023-08-30 04:57:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:57:56,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:57:56,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:57:56,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858041955] [2023-08-30 04:57:56,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858041955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:57:56,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:57:56,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:57:56,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303248037] [2023-08-30 04:57:56,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:57:56,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:57:56,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:57:56,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:57:56,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:57:58,744 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] [2023-08-30 04:57:59,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 476 [2023-08-30 04:57:59,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 95 transitions, 1016 flow. Second operand has 11 states, 11 states have (on average 185.72727272727272) internal successors, (2043), 11 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:57:59,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:57:59,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 476 [2023-08-30 04:57:59,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:01,354 INFO L130 PetriNetUnfolder]: 3981/7145 cut-off events. [2023-08-30 04:58:01,355 INFO L131 PetriNetUnfolder]: For 29539/29541 co-relation queries the response was YES. [2023-08-30 04:58:01,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27660 conditions, 7145 events. 3981/7145 cut-off events. For 29539/29541 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45413 event pairs, 2998 based on Foata normal form. 1/7146 useless extension candidates. Maximal degree in co-relation 27602. Up to 6441 conditions per place. [2023-08-30 04:58:01,401 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 114 selfloop transitions, 20 changer transitions 8/143 dead transitions. [2023-08-30 04:58:01,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 143 transitions, 1603 flow [2023-08-30 04:58:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:58:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:58:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1733 transitions. [2023-08-30 04:58:01,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40452847805788983 [2023-08-30 04:58:01,404 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1733 transitions. [2023-08-30 04:58:01,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1733 transitions. [2023-08-30 04:58:01,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:01,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1733 transitions. [2023-08-30 04:58:01,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.55555555555554) internal successors, (1733), 9 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:01,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:01,407 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:01,408 INFO L175 Difference]: Start difference. First operand has 141 places, 95 transitions, 1016 flow. Second operand 9 states and 1733 transitions. [2023-08-30 04:58:01,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 143 transitions, 1603 flow [2023-08-30 04:58:01,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 143 transitions, 1548 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 04:58:01,490 INFO L231 Difference]: Finished difference. Result has 149 places, 99 transitions, 1105 flow [2023-08-30 04:58:01,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1105, PETRI_PLACES=149, PETRI_TRANSITIONS=99} [2023-08-30 04:58:01,490 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2023-08-30 04:58:01,490 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 99 transitions, 1105 flow [2023-08-30 04:58:01,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 185.72727272727272) internal successors, (2043), 11 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:01,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:01,491 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:01,501 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 (41)] Ended with exit code 0 [2023-08-30 04:58:01,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:01,701 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:58:01,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:01,701 INFO L85 PathProgramCache]: Analyzing trace with hash -166650836, now seen corresponding path program 14 times [2023-08-30 04:58:01,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:01,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832576705] [2023-08-30 04:58:01,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:58:01,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:01,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:01,703 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:01,705 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 (42)] Waiting until timeout for monitored process [2023-08-30 04:58:01,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:58:01,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:01,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:58:01,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:02,166 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:58:02,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:58:02,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:58:02,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:58:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:02,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:02,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:02,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832576705] [2023-08-30 04:58:02,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832576705] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:02,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:02,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:58:02,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332323502] [2023-08-30 04:58:02,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:02,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:58:02,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:02,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:58:02,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:58:03,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 476 [2023-08-30 04:58:03,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 99 transitions, 1105 flow. Second operand has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:03,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:03,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 476 [2023-08-30 04:58:03,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:04,918 INFO L130 PetriNetUnfolder]: 3979/7143 cut-off events. [2023-08-30 04:58:04,918 INFO L131 PetriNetUnfolder]: For 28085/28087 co-relation queries the response was YES. [2023-08-30 04:58:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27519 conditions, 7143 events. 3979/7143 cut-off events. For 28085/28087 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 45370 event pairs, 3048 based on Foata normal form. 1/7144 useless extension candidates. Maximal degree in co-relation 27458. Up to 6441 conditions per place. [2023-08-30 04:58:04,951 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 106 selfloop transitions, 24 changer transitions 7/138 dead transitions. [2023-08-30 04:58:04,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 138 transitions, 1569 flow [2023-08-30 04:58:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:58:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:58:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1719 transitions. [2023-08-30 04:58:04,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4012605042016807 [2023-08-30 04:58:04,955 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1719 transitions. [2023-08-30 04:58:04,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1719 transitions. [2023-08-30 04:58:04,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:04,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1719 transitions. [2023-08-30 04:58:04,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.0) internal successors, (1719), 9 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:04,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:04,958 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:04,958 INFO L175 Difference]: Start difference. First operand has 149 places, 99 transitions, 1105 flow. Second operand 9 states and 1719 transitions. [2023-08-30 04:58:04,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 138 transitions, 1569 flow [2023-08-30 04:58:05,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 138 transitions, 1514 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-08-30 04:58:05,015 INFO L231 Difference]: Finished difference. Result has 153 places, 99 transitions, 1117 flow [2023-08-30 04:58:05,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1117, PETRI_PLACES=153, PETRI_TRANSITIONS=99} [2023-08-30 04:58:05,015 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2023-08-30 04:58:05,015 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 99 transitions, 1117 flow [2023-08-30 04:58:05,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:05,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:05,016 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:05,023 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 (42)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:05,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:05,216 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:58:05,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:05,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1548124994, now seen corresponding path program 15 times [2023-08-30 04:58:05,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:05,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922444250] [2023-08-30 04:58:05,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:58:05,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:05,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:05,217 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:05,218 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 (43)] Waiting until timeout for monitored process [2023-08-30 04:58:05,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 04:58:05,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:05,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:58:05,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:05,548 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 04:58:05,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 145 [2023-08-30 04:58:05,554 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 04:58:05,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 137 [2023-08-30 04:58:05,754 INFO L321 Elim1Store]: treesize reduction 28, result has 71.1 percent of original size [2023-08-30 04:58:05,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 181 treesize of output 137 [2023-08-30 04:58:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:05,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:05,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922444250] [2023-08-30 04:58:05,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922444250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:05,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:05,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 04:58:05,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923297122] [2023-08-30 04:58:05,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:05,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:58:05,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:05,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:58:05,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:58:06,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 476 [2023-08-30 04:58:06,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 99 transitions, 1117 flow. Second operand has 11 states, 11 states have (on average 185.72727272727272) internal successors, (2043), 11 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:06,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:06,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 476 [2023-08-30 04:58:06,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:08,341 INFO L130 PetriNetUnfolder]: 3977/7127 cut-off events. [2023-08-30 04:58:08,341 INFO L131 PetriNetUnfolder]: For 28272/28274 co-relation queries the response was YES. [2023-08-30 04:58:08,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27475 conditions, 7127 events. 3977/7127 cut-off events. For 28272/28274 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 45116 event pairs, 2966 based on Foata normal form. 1/7128 useless extension candidates. Maximal degree in co-relation 27413. Up to 6441 conditions per place. [2023-08-30 04:58:08,379 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 101 selfloop transitions, 25 changer transitions 9/136 dead transitions. [2023-08-30 04:58:08,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 136 transitions, 1595 flow [2023-08-30 04:58:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:58:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:58:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1725 transitions. [2023-08-30 04:58:08,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026610644257703 [2023-08-30 04:58:08,382 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1725 transitions. [2023-08-30 04:58:08,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1725 transitions. [2023-08-30 04:58:08,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:08,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1725 transitions. [2023-08-30 04:58:08,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.66666666666666) internal successors, (1725), 9 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,385 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,385 INFO L175 Difference]: Start difference. First operand has 153 places, 99 transitions, 1117 flow. Second operand 9 states and 1725 transitions. [2023-08-30 04:58:08,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 136 transitions, 1595 flow [2023-08-30 04:58:08,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 136 transitions, 1535 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-30 04:58:08,441 INFO L231 Difference]: Finished difference. Result has 154 places, 99 transitions, 1126 flow [2023-08-30 04:58:08,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1126, PETRI_PLACES=154, PETRI_TRANSITIONS=99} [2023-08-30 04:58:08,441 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2023-08-30 04:58:08,442 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 99 transitions, 1126 flow [2023-08-30 04:58:08,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 185.72727272727272) internal successors, (2043), 11 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:08,442 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:08,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2023-08-30 04:58:08,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:08,642 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:58:08,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:08,643 INFO L85 PathProgramCache]: Analyzing trace with hash 38585410, now seen corresponding path program 16 times [2023-08-30 04:58:08,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:08,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171741462] [2023-08-30 04:58:08,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 04:58:08,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:08,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:08,644 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:08,645 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 (44)] Waiting until timeout for monitored process [2023-08-30 04:58:08,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 04:58:08,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:08,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 04:58:08,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:08,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-08-30 04:58:09,022 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 [2023-08-30 04:58:09,103 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 32 treesize of output 28 [2023-08-30 04:58:09,336 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:58:09,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:58:09,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:58:09,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:58:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:09,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:09,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:09,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171741462] [2023-08-30 04:58:09,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171741462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:09,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:09,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 04:58:09,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654894279] [2023-08-30 04:58:09,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:09,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:58:09,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:09,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:58:09,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:58:11,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 476 [2023-08-30 04:58:11,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 99 transitions, 1126 flow. Second operand has 12 states, 12 states have (on average 182.58333333333334) internal successors, (2191), 12 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:11,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:11,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 476 [2023-08-30 04:58:11,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:13,220 INFO L130 PetriNetUnfolder]: 4120/7490 cut-off events. [2023-08-30 04:58:13,220 INFO L131 PetriNetUnfolder]: For 29375/29377 co-relation queries the response was YES. [2023-08-30 04:58:13,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28575 conditions, 7490 events. 4120/7490 cut-off events. For 29375/29377 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 48728 event pairs, 2414 based on Foata normal form. 5/7495 useless extension candidates. Maximal degree in co-relation 28513. Up to 4306 conditions per place. [2023-08-30 04:58:13,265 INFO L137 encePairwiseOnDemand]: 463/476 looper letters, 136 selfloop transitions, 38 changer transitions 10/185 dead transitions. [2023-08-30 04:58:13,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 185 transitions, 2092 flow [2023-08-30 04:58:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 04:58:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 04:58:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1889 transitions. [2023-08-30 04:58:13,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968487394957983 [2023-08-30 04:58:13,267 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1889 transitions. [2023-08-30 04:58:13,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1889 transitions. [2023-08-30 04:58:13,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:13,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1889 transitions. [2023-08-30 04:58:13,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 188.9) internal successors, (1889), 10 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:13,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:13,271 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:13,271 INFO L175 Difference]: Start difference. First operand has 154 places, 99 transitions, 1126 flow. Second operand 10 states and 1889 transitions. [2023-08-30 04:58:13,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 185 transitions, 2092 flow [2023-08-30 04:58:13,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 185 transitions, 2010 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-08-30 04:58:13,350 INFO L231 Difference]: Finished difference. Result has 154 places, 102 transitions, 1195 flow [2023-08-30 04:58:13,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1195, PETRI_PLACES=154, PETRI_TRANSITIONS=102} [2023-08-30 04:58:13,350 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2023-08-30 04:58:13,350 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 102 transitions, 1195 flow [2023-08-30 04:58:13,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 182.58333333333334) internal successors, (2191), 12 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:13,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:13,351 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:13,363 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 (44)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:13,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:13,551 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:58:13,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:13,552 INFO L85 PathProgramCache]: Analyzing trace with hash 200681468, now seen corresponding path program 17 times [2023-08-30 04:58:13,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:13,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609035696] [2023-08-30 04:58:13,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 04:58:13,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:13,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:13,553 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:13,553 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 (45)] Waiting until timeout for monitored process [2023-08-30 04:58:13,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 04:58:13,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:13,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 04:58:13,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:14,003 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 [2023-08-30 04:58:14,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:14,370 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 04:58:14,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 47 [2023-08-30 04:58:17,380 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:58:17,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:58:17,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:58:17,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:58:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:17,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:17,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:17,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609035696] [2023-08-30 04:58:17,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609035696] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:17,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:17,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 04:58:17,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560810617] [2023-08-30 04:58:17,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:17,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:58:17,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:17,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:58:17,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:58:21,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 476 [2023-08-30 04:58:21,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 102 transitions, 1195 flow. Second operand has 12 states, 12 states have (on average 181.58333333333334) internal successors, (2179), 12 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:21,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:21,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 476 [2023-08-30 04:58:21,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:25,496 INFO L130 PetriNetUnfolder]: 4116/7444 cut-off events. [2023-08-30 04:58:25,496 INFO L131 PetriNetUnfolder]: For 36105/36107 co-relation queries the response was YES. [2023-08-30 04:58:25,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30010 conditions, 7444 events. 4116/7444 cut-off events. For 36105/36107 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 48187 event pairs, 2423 based on Foata normal form. 5/7449 useless extension candidates. Maximal degree in co-relation 29947. Up to 4312 conditions per place. [2023-08-30 04:58:25,550 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 138 selfloop transitions, 36 changer transitions 11/186 dead transitions. [2023-08-30 04:58:25,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 186 transitions, 2163 flow [2023-08-30 04:58:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:58:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:58:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1699 transitions. [2023-08-30 04:58:25,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39659197012138186 [2023-08-30 04:58:25,553 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1699 transitions. [2023-08-30 04:58:25,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1699 transitions. [2023-08-30 04:58:25,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:25,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1699 transitions. [2023-08-30 04:58:25,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 188.77777777777777) internal successors, (1699), 9 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:25,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:25,556 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:25,556 INFO L175 Difference]: Start difference. First operand has 154 places, 102 transitions, 1195 flow. Second operand 9 states and 1699 transitions. [2023-08-30 04:58:25,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 186 transitions, 2163 flow [2023-08-30 04:58:25,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 186 transitions, 2111 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-08-30 04:58:25,653 INFO L231 Difference]: Finished difference. Result has 158 places, 102 transitions, 1251 flow [2023-08-30 04:58:25,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1251, PETRI_PLACES=158, PETRI_TRANSITIONS=102} [2023-08-30 04:58:25,653 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 103 predicate places. [2023-08-30 04:58:25,653 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 102 transitions, 1251 flow [2023-08-30 04:58:25,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 181.58333333333334) internal successors, (2179), 12 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:25,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:25,654 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:58:25,664 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 (45)] Ended with exit code 0 [2023-08-30 04:58:25,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:25,854 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:58:25,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:25,855 INFO L85 PathProgramCache]: Analyzing trace with hash -273882118, now seen corresponding path program 18 times [2023-08-30 04:58:25,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:25,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348530488] [2023-08-30 04:58:25,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 04:58:25,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:25,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:25,856 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:25,857 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 (46)] Waiting until timeout for monitored process [2023-08-30 04:58:26,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 04:58:26,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 04:58:26,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:26,086 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 [2023-08-30 04:58:26,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:58:26,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:58:26,456 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 04:58:26,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 47 [2023-08-30 04:58:28,797 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:58:28,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:58:28,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:58:28,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:58:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:58:28,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:28,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:28,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348530488] [2023-08-30 04:58:28,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348530488] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:28,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:28,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 04:58:28,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697979216] [2023-08-30 04:58:28,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:28,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:58:28,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:28,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:58:28,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=105, Unknown=1, NotChecked=0, Total=132 [2023-08-30 04:58:30,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:58:31,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:58:35,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:58:36,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:58:38,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:58:44,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:58:48,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:58:53,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:58:56,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:58:59,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:59:02,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:59:07,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:59:07,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 476 [2023-08-30 04:59:07,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 102 transitions, 1251 flow. Second operand has 12 states, 12 states have (on average 123.58333333333333) internal successors, (1483), 12 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:07,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:07,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 476 [2023-08-30 04:59:07,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:13,703 INFO L130 PetriNetUnfolder]: 4428/7798 cut-off events. [2023-08-30 04:59:13,704 INFO L131 PetriNetUnfolder]: For 36897/36897 co-relation queries the response was YES. [2023-08-30 04:59:13,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31467 conditions, 7798 events. 4428/7798 cut-off events. For 36897/36897 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 48704 event pairs, 2608 based on Foata normal form. 14/7812 useless extension candidates. Maximal degree in co-relation 31402. Up to 4678 conditions per place. [2023-08-30 04:59:13,748 INFO L137 encePairwiseOnDemand]: 464/476 looper letters, 135 selfloop transitions, 36 changer transitions 7/178 dead transitions. [2023-08-30 04:59:13,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 178 transitions, 2112 flow [2023-08-30 04:59:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 04:59:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 04:59:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1301 transitions. [2023-08-30 04:59:13,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2733193277310924 [2023-08-30 04:59:13,752 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1301 transitions. [2023-08-30 04:59:13,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1301 transitions. [2023-08-30 04:59:13,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:13,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1301 transitions. [2023-08-30 04:59:13,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 130.1) internal successors, (1301), 10 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:13,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:13,757 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:13,757 INFO L175 Difference]: Start difference. First operand has 158 places, 102 transitions, 1251 flow. Second operand 10 states and 1301 transitions. [2023-08-30 04:59:13,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 178 transitions, 2112 flow [2023-08-30 04:59:13,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 178 transitions, 2003 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-08-30 04:59:13,886 INFO L231 Difference]: Finished difference. Result has 162 places, 104 transitions, 1292 flow [2023-08-30 04:59:13,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1292, PETRI_PLACES=162, PETRI_TRANSITIONS=104} [2023-08-30 04:59:13,886 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2023-08-30 04:59:13,886 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 104 transitions, 1292 flow [2023-08-30 04:59:13,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 123.58333333333333) internal successors, (1483), 12 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:13,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:13,887 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:13,895 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 (46)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:14,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:14,095 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:59:14,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1749747478, now seen corresponding path program 19 times [2023-08-30 04:59:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:14,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745334708] [2023-08-30 04:59:14,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 04:59:14,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:14,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:14,097 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:14,098 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 (47)] Waiting until timeout for monitored process [2023-08-30 04:59:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:14,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 04:59:14,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:14,452 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 [2023-08-30 04:59:14,579 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 [2023-08-30 04:59:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:14,801 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 04:59:14,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 47 [2023-08-30 04:59:15,520 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:59:15,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:59:15,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:59:15,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:59:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:59:15,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:15,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:15,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745334708] [2023-08-30 04:59:15,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745334708] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:15,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:15,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 04:59:15,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490813881] [2023-08-30 04:59:15,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:15,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:59:15,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:15,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:59:15,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:59:20,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 04:59:21,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 476 [2023-08-30 04:59:21,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 104 transitions, 1292 flow. Second operand has 12 states, 12 states have (on average 181.58333333333334) internal successors, (2179), 12 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:21,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:21,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 476 [2023-08-30 04:59:21,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:28,547 INFO L130 PetriNetUnfolder]: 3978/7191 cut-off events. [2023-08-30 04:59:28,548 INFO L131 PetriNetUnfolder]: For 38045/38047 co-relation queries the response was YES. [2023-08-30 04:59:28,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29041 conditions, 7191 events. 3978/7191 cut-off events. For 38045/38047 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45880 event pairs, 2358 based on Foata normal form. 1/7192 useless extension candidates. Maximal degree in co-relation 28975. Up to 4312 conditions per place. [2023-08-30 04:59:28,596 INFO L137 encePairwiseOnDemand]: 466/476 looper letters, 122 selfloop transitions, 33 changer transitions 16/172 dead transitions. [2023-08-30 04:59:28,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 172 transitions, 2085 flow [2023-08-30 04:59:28,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 04:59:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 04:59:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1694 transitions. [2023-08-30 04:59:28,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954248366013072 [2023-08-30 04:59:28,599 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1694 transitions. [2023-08-30 04:59:28,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1694 transitions. [2023-08-30 04:59:28,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:28,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1694 transitions. [2023-08-30 04:59:28,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 188.22222222222223) internal successors, (1694), 9 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:28,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:28,603 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 476.0) internal successors, (4760), 10 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:28,603 INFO L175 Difference]: Start difference. First operand has 162 places, 104 transitions, 1292 flow. Second operand 9 states and 1694 transitions. [2023-08-30 04:59:28,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 172 transitions, 2085 flow [2023-08-30 04:59:28,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 172 transitions, 1997 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-08-30 04:59:28,722 INFO L231 Difference]: Finished difference. Result has 165 places, 100 transitions, 1229 flow [2023-08-30 04:59:28,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1229, PETRI_PLACES=165, PETRI_TRANSITIONS=100} [2023-08-30 04:59:28,722 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2023-08-30 04:59:28,722 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 100 transitions, 1229 flow [2023-08-30 04:59:28,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 181.58333333333334) internal successors, (2179), 12 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:28,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:28,723 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:28,735 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 (47)] Ended with exit code 0 [2023-08-30 04:59:28,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:28,923 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:59:28,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:28,923 INFO L85 PathProgramCache]: Analyzing trace with hash -502609790, now seen corresponding path program 20 times [2023-08-30 04:59:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:28,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392927857] [2023-08-30 04:59:28,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:59:28,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:28,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:28,925 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:28,927 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 (48)] Waiting until timeout for monitored process [2023-08-30 04:59:29,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:59:29,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:59:29,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 04:59:29,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:29,157 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 [2023-08-30 04:59:29,295 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 32 treesize of output 28 [2023-08-30 04:59:29,420 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 04:59:29,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 145 [2023-08-30 04:59:29,426 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 04:59:29,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 137 [2023-08-30 04:59:29,744 INFO L321 Elim1Store]: treesize reduction 28, result has 71.1 percent of original size [2023-08-30 04:59:29,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 181 treesize of output 137 [2023-08-30 04:59:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:59:29,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:29,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:29,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392927857] [2023-08-30 04:59:29,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392927857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:29,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:29,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 04:59:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473401718] [2023-08-30 04:59:29,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:29,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:59:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:59:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:59:32,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 476 [2023-08-30 04:59:32,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 100 transitions, 1229 flow. Second operand has 12 states, 12 states have (on average 182.58333333333334) internal successors, (2191), 12 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:32,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:32,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 476 [2023-08-30 04:59:32,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:33,828 INFO L130 PetriNetUnfolder]: 3965/7165 cut-off events. [2023-08-30 04:59:33,828 INFO L131 PetriNetUnfolder]: For 35690/35692 co-relation queries the response was YES. [2023-08-30 04:59:33,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29034 conditions, 7165 events. 3965/7165 cut-off events. For 35690/35692 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45458 event pairs, 2472 based on Foata normal form. 1/7166 useless extension candidates. Maximal degree in co-relation 28967. Up to 4306 conditions per place. [2023-08-30 04:59:33,881 INFO L137 encePairwiseOnDemand]: 464/476 looper letters, 100 selfloop transitions, 43 changer transitions 7/151 dead transitions. [2023-08-30 04:59:33,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 151 transitions, 1876 flow [2023-08-30 04:59:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 04:59:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 04:59:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1877 transitions. [2023-08-30 04:59:33,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39432773109243696 [2023-08-30 04:59:33,884 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1877 transitions. [2023-08-30 04:59:33,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1877 transitions. [2023-08-30 04:59:33,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:33,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1877 transitions. [2023-08-30 04:59:33,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 187.7) internal successors, (1877), 10 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:33,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:33,887 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:33,888 INFO L175 Difference]: Start difference. First operand has 165 places, 100 transitions, 1229 flow. Second operand 10 states and 1877 transitions. [2023-08-30 04:59:33,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 151 transitions, 1876 flow [2023-08-30 04:59:33,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 151 transitions, 1764 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-08-30 04:59:33,993 INFO L231 Difference]: Finished difference. Result has 161 places, 106 transitions, 1348 flow [2023-08-30 04:59:33,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1348, PETRI_PLACES=161, PETRI_TRANSITIONS=106} [2023-08-30 04:59:33,993 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 106 predicate places. [2023-08-30 04:59:33,993 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 106 transitions, 1348 flow [2023-08-30 04:59:33,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 182.58333333333334) internal successors, (2191), 12 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:33,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:33,994 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:34,002 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 (48)] Ended with exit code 0 [2023-08-30 04:59:34,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:34,194 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:59:34,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:34,195 INFO L85 PathProgramCache]: Analyzing trace with hash -418674816, now seen corresponding path program 21 times [2023-08-30 04:59:34,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:34,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39280443] [2023-08-30 04:59:34,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:59:34,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:34,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:34,196 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:34,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2023-08-30 04:59:34,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 04:59:34,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:59:34,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 04:59:34,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:34,428 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 [2023-08-30 04:59:34,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:59:34,612 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 32 treesize of output 28 [2023-08-30 04:59:34,803 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:59:34,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:59:34,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:59:34,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:59:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:59:34,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:34,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:34,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39280443] [2023-08-30 04:59:34,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39280443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:34,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:34,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 04:59:34,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634805798] [2023-08-30 04:59:34,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:34,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:59:34,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:34,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:59:34,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:59:36,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 476 [2023-08-30 04:59:36,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 106 transitions, 1348 flow. Second operand has 12 states, 12 states have (on average 180.58333333333334) internal successors, (2167), 12 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:36,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:36,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 476 [2023-08-30 04:59:36,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:38,753 INFO L130 PetriNetUnfolder]: 3956/7154 cut-off events. [2023-08-30 04:59:38,753 INFO L131 PetriNetUnfolder]: For 33294/33296 co-relation queries the response was YES. [2023-08-30 04:59:38,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29070 conditions, 7154 events. 3956/7154 cut-off events. For 33294/33296 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45470 event pairs, 2465 based on Foata normal form. 7/7161 useless extension candidates. Maximal degree in co-relation 29006. Up to 4306 conditions per place. [2023-08-30 04:59:38,790 INFO L137 encePairwiseOnDemand]: 464/476 looper letters, 109 selfloop transitions, 42 changer transitions 5/157 dead transitions. [2023-08-30 04:59:38,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 157 transitions, 1931 flow [2023-08-30 04:59:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 04:59:38,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 04:59:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1863 transitions. [2023-08-30 04:59:38,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39138655462184874 [2023-08-30 04:59:38,793 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1863 transitions. [2023-08-30 04:59:38,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1863 transitions. [2023-08-30 04:59:38,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:38,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1863 transitions. [2023-08-30 04:59:38,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 186.3) internal successors, (1863), 10 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:38,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:38,796 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:38,796 INFO L175 Difference]: Start difference. First operand has 161 places, 106 transitions, 1348 flow. Second operand 10 states and 1863 transitions. [2023-08-30 04:59:38,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 157 transitions, 1931 flow [2023-08-30 04:59:38,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 157 transitions, 1833 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-08-30 04:59:38,879 INFO L231 Difference]: Finished difference. Result has 164 places, 107 transitions, 1369 flow [2023-08-30 04:59:38,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1369, PETRI_PLACES=164, PETRI_TRANSITIONS=107} [2023-08-30 04:59:38,879 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2023-08-30 04:59:38,879 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 107 transitions, 1369 flow [2023-08-30 04:59:38,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.58333333333334) internal successors, (2167), 12 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:38,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:38,880 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:38,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:39,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:39,080 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:59:39,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash 601716316, now seen corresponding path program 22 times [2023-08-30 04:59:39,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:39,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949287285] [2023-08-30 04:59:39,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 04:59:39,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:39,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:39,082 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:39,083 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 (50)] Waiting until timeout for monitored process [2023-08-30 04:59:39,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 04:59:39,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:59:39,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 04:59:39,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:39,444 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 [2023-08-30 04:59:39,600 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 32 treesize of output 28 [2023-08-30 04:59:39,886 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-08-30 04:59:39,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 109 [2023-08-30 04:59:39,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 04:59:39,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-08-30 04:59:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:59:39,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:39,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:39,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949287285] [2023-08-30 04:59:39,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949287285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:39,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:39,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 04:59:39,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216150832] [2023-08-30 04:59:39,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:39,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:59:39,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:59:39,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:59:42,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 476 [2023-08-30 04:59:42,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 107 transitions, 1369 flow. Second operand has 12 states, 12 states have (on average 182.58333333333334) internal successors, (2191), 12 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:42,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:42,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 476 [2023-08-30 04:59:42,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:44,133 INFO L130 PetriNetUnfolder]: 3955/7147 cut-off events. [2023-08-30 04:59:44,133 INFO L131 PetriNetUnfolder]: For 35488/35490 co-relation queries the response was YES. [2023-08-30 04:59:44,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29058 conditions, 7147 events. 3955/7147 cut-off events. For 35488/35490 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 45091 event pairs, 2669 based on Foata normal form. 1/7148 useless extension candidates. Maximal degree in co-relation 28993. Up to 4306 conditions per place. [2023-08-30 04:59:44,182 INFO L137 encePairwiseOnDemand]: 464/476 looper letters, 100 selfloop transitions, 40 changer transitions 12/153 dead transitions. [2023-08-30 04:59:44,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 153 transitions, 1925 flow [2023-08-30 04:59:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 04:59:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 04:59:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1878 transitions. [2023-08-30 04:59:44,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945378151260504 [2023-08-30 04:59:44,185 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1878 transitions. [2023-08-30 04:59:44,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1878 transitions. [2023-08-30 04:59:44,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:44,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1878 transitions. [2023-08-30 04:59:44,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 187.8) internal successors, (1878), 10 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:44,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:44,189 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:44,189 INFO L175 Difference]: Start difference. First operand has 164 places, 107 transitions, 1369 flow. Second operand 10 states and 1878 transitions. [2023-08-30 04:59:44,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 153 transitions, 1925 flow [2023-08-30 04:59:44,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 153 transitions, 1832 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-30 04:59:44,281 INFO L231 Difference]: Finished difference. Result has 167 places, 105 transitions, 1334 flow [2023-08-30 04:59:44,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1334, PETRI_PLACES=167, PETRI_TRANSITIONS=105} [2023-08-30 04:59:44,281 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2023-08-30 04:59:44,281 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 105 transitions, 1334 flow [2023-08-30 04:59:44,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 182.58333333333334) internal successors, (2191), 12 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:44,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:44,282 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:44,291 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 (50)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:44,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:44,482 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:59:44,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:44,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1488471592, now seen corresponding path program 1 times [2023-08-30 04:59:44,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:44,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617223258] [2023-08-30 04:59:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:44,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:44,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:44,484 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:44,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2023-08-30 04:59:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:44,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 04:59:44,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:59:44,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:44,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:44,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617223258] [2023-08-30 04:59:44,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617223258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:44,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:44,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 04:59:44,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61910080] [2023-08-30 04:59:44,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:44,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 04:59:44,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:44,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 04:59:44,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-30 04:59:45,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 476 [2023-08-30 04:59:45,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 105 transitions, 1334 flow. Second operand has 9 states, 9 states have (on average 195.22222222222223) internal successors, (1757), 9 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:45,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:45,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 476 [2023-08-30 04:59:45,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:47,387 INFO L130 PetriNetUnfolder]: 4075/7338 cut-off events. [2023-08-30 04:59:47,387 INFO L131 PetriNetUnfolder]: For 36388/36390 co-relation queries the response was YES. [2023-08-30 04:59:47,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29992 conditions, 7338 events. 4075/7338 cut-off events. For 36388/36390 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 46662 event pairs, 2467 based on Foata normal form. 44/7382 useless extension candidates. Maximal degree in co-relation 29926. Up to 4312 conditions per place. [2023-08-30 04:59:47,439 INFO L137 encePairwiseOnDemand]: 467/476 looper letters, 121 selfloop transitions, 35 changer transitions 0/157 dead transitions. [2023-08-30 04:59:47,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 157 transitions, 1964 flow [2023-08-30 04:59:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:59:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:59:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1416 transitions. [2023-08-30 04:59:47,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249699879951981 [2023-08-30 04:59:47,441 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1416 transitions. [2023-08-30 04:59:47,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1416 transitions. [2023-08-30 04:59:47,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:47,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1416 transitions. [2023-08-30 04:59:47,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.28571428571428) internal successors, (1416), 7 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:47,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 476.0) internal successors, (3808), 8 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:47,444 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 476.0) internal successors, (3808), 8 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:47,444 INFO L175 Difference]: Start difference. First operand has 167 places, 105 transitions, 1334 flow. Second operand 7 states and 1416 transitions. [2023-08-30 04:59:47,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 157 transitions, 1964 flow [2023-08-30 04:59:47,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 157 transitions, 1870 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-08-30 04:59:47,549 INFO L231 Difference]: Finished difference. Result has 158 places, 106 transitions, 1329 flow [2023-08-30 04:59:47,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1329, PETRI_PLACES=158, PETRI_TRANSITIONS=106} [2023-08-30 04:59:47,550 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 103 predicate places. [2023-08-30 04:59:47,550 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 106 transitions, 1329 flow [2023-08-30 04:59:47,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 195.22222222222223) internal successors, (1757), 9 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:47,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:47,550 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:47,564 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 (51)] Ended with exit code 0 [2023-08-30 04:59:47,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:47,751 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:59:47,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:47,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1414949864, now seen corresponding path program 2 times [2023-08-30 04:59:47,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:47,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325522045] [2023-08-30 04:59:47,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:59:47,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:47,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:47,752 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:47,753 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 (52)] Waiting until timeout for monitored process [2023-08-30 04:59:48,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:59:48,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:59:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:59:48,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:59:48,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:48,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:48,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325522045] [2023-08-30 04:59:48,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325522045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:48,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:48,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 04:59:48,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389253354] [2023-08-30 04:59:48,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:48,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 04:59:48,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:48,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 04:59:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-30 04:59:48,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 476 [2023-08-30 04:59:48,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 106 transitions, 1329 flow. Second operand has 9 states, 9 states have (on average 195.22222222222223) internal successors, (1757), 9 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:48,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:48,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 476 [2023-08-30 04:59:48,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:50,566 INFO L130 PetriNetUnfolder]: 4201/7550 cut-off events. [2023-08-30 04:59:50,567 INFO L131 PetriNetUnfolder]: For 36595/36597 co-relation queries the response was YES. [2023-08-30 04:59:50,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30653 conditions, 7550 events. 4201/7550 cut-off events. For 36595/36597 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 48156 event pairs, 2624 based on Foata normal form. 42/7592 useless extension candidates. Maximal degree in co-relation 30591. Up to 4312 conditions per place. [2023-08-30 04:59:50,617 INFO L137 encePairwiseOnDemand]: 468/476 looper letters, 123 selfloop transitions, 26 changer transitions 0/150 dead transitions. [2023-08-30 04:59:50,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 150 transitions, 1869 flow [2023-08-30 04:59:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:59:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:59:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1418 transitions. [2023-08-30 04:59:50,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255702280912365 [2023-08-30 04:59:50,619 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1418 transitions. [2023-08-30 04:59:50,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1418 transitions. [2023-08-30 04:59:50,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:50,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1418 transitions. [2023-08-30 04:59:50,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.57142857142858) internal successors, (1418), 7 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:50,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 476.0) internal successors, (3808), 8 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:50,622 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 476.0) internal successors, (3808), 8 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:50,622 INFO L175 Difference]: Start difference. First operand has 158 places, 106 transitions, 1329 flow. Second operand 7 states and 1418 transitions. [2023-08-30 04:59:50,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 150 transitions, 1869 flow [2023-08-30 04:59:50,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 150 transitions, 1793 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 04:59:50,714 INFO L231 Difference]: Finished difference. Result has 160 places, 107 transitions, 1328 flow [2023-08-30 04:59:50,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1328, PETRI_PLACES=160, PETRI_TRANSITIONS=107} [2023-08-30 04:59:50,715 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2023-08-30 04:59:50,715 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 107 transitions, 1328 flow [2023-08-30 04:59:50,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 195.22222222222223) internal successors, (1757), 9 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:50,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:50,715 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:50,725 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 (52)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:50,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:50,923 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:59:50,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash 475288022, now seen corresponding path program 3 times [2023-08-30 04:59:50,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:50,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529600035] [2023-08-30 04:59:50,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:59:50,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:50,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:50,925 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:50,927 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 (53)] Waiting until timeout for monitored process [2023-08-30 04:59:51,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 04:59:51,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:59:51,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:59:51,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:59:51,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:51,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:51,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529600035] [2023-08-30 04:59:51,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529600035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:51,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:51,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 04:59:51,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318978348] [2023-08-30 04:59:51,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:51,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 04:59:51,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:51,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 04:59:51,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-30 04:59:52,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 476 [2023-08-30 04:59:52,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 107 transitions, 1328 flow. Second operand has 9 states, 9 states have (on average 195.22222222222223) internal successors, (1757), 9 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:52,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:52,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 476 [2023-08-30 04:59:52,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:53,916 INFO L130 PetriNetUnfolder]: 4033/7236 cut-off events. [2023-08-30 04:59:53,916 INFO L131 PetriNetUnfolder]: For 35322/35324 co-relation queries the response was YES. [2023-08-30 04:59:53,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28908 conditions, 7236 events. 4033/7236 cut-off events. For 35322/35324 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 45461 event pairs, 2500 based on Foata normal form. 42/7278 useless extension candidates. Maximal degree in co-relation 28845. Up to 4312 conditions per place. [2023-08-30 04:59:53,965 INFO L137 encePairwiseOnDemand]: 468/476 looper letters, 146 selfloop transitions, 23 changer transitions 2/172 dead transitions. [2023-08-30 04:59:53,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 172 transitions, 2059 flow [2023-08-30 04:59:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:59:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:59:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1427 transitions. [2023-08-30 04:59:53,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282713085234094 [2023-08-30 04:59:53,967 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1427 transitions. [2023-08-30 04:59:53,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1427 transitions. [2023-08-30 04:59:53,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:53,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1427 transitions. [2023-08-30 04:59:53,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 203.85714285714286) internal successors, (1427), 7 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:53,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 476.0) internal successors, (3808), 8 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:53,977 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 476.0) internal successors, (3808), 8 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:53,977 INFO L175 Difference]: Start difference. First operand has 160 places, 107 transitions, 1328 flow. Second operand 7 states and 1427 transitions. [2023-08-30 04:59:53,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 172 transitions, 2059 flow [2023-08-30 04:59:54,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 172 transitions, 2003 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 04:59:54,066 INFO L231 Difference]: Finished difference. Result has 162 places, 109 transitions, 1358 flow [2023-08-30 04:59:54,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1358, PETRI_PLACES=162, PETRI_TRANSITIONS=109} [2023-08-30 04:59:54,066 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2023-08-30 04:59:54,066 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 109 transitions, 1358 flow [2023-08-30 04:59:54,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 195.22222222222223) internal successors, (1757), 9 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:54,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:54,067 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:54,076 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 (53)] Ended with exit code 0 [2023-08-30 04:59:54,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:54,271 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:59:54,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:54,272 INFO L85 PathProgramCache]: Analyzing trace with hash -618803566, now seen corresponding path program 4 times [2023-08-30 04:59:54,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:54,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533550547] [2023-08-30 04:59:54,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 04:59:54,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:54,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:54,274 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:54,275 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 (54)] Waiting until timeout for monitored process [2023-08-30 04:59:54,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 04:59:54,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:59:54,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:59:54,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:59:54,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:54,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:54,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533550547] [2023-08-30 04:59:54,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533550547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:54,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:54,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 04:59:54,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136975557] [2023-08-30 04:59:54,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:54,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 04:59:54,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 04:59:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 04:59:55,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 476 [2023-08-30 04:59:55,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 109 transitions, 1358 flow. Second operand has 9 states, 9 states have (on average 195.22222222222223) internal successors, (1757), 9 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:55,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:55,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 476 [2023-08-30 04:59:55,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:57,430 INFO L130 PetriNetUnfolder]: 4684/8393 cut-off events. [2023-08-30 04:59:57,430 INFO L131 PetriNetUnfolder]: For 46214/46216 co-relation queries the response was YES. [2023-08-30 04:59:57,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34659 conditions, 8393 events. 4684/8393 cut-off events. For 46214/46216 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 55330 event pairs, 3250 based on Foata normal form. 42/8435 useless extension candidates. Maximal degree in co-relation 34595. Up to 6569 conditions per place. [2023-08-30 04:59:57,489 INFO L137 encePairwiseOnDemand]: 468/476 looper letters, 150 selfloop transitions, 22 changer transitions 0/173 dead transitions. [2023-08-30 04:59:57,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 173 transitions, 2129 flow [2023-08-30 04:59:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:59:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:59:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1426 transitions. [2023-08-30 04:59:57,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279711884753902 [2023-08-30 04:59:57,491 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1426 transitions. [2023-08-30 04:59:57,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1426 transitions. [2023-08-30 04:59:57,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:57,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1426 transitions. [2023-08-30 04:59:57,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 203.71428571428572) internal successors, (1426), 7 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:57,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 476.0) internal successors, (3808), 8 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:57,494 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 476.0) internal successors, (3808), 8 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:57,494 INFO L175 Difference]: Start difference. First operand has 162 places, 109 transitions, 1358 flow. Second operand 7 states and 1426 transitions. [2023-08-30 04:59:57,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 173 transitions, 2129 flow [2023-08-30 04:59:57,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 173 transitions, 2074 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-30 04:59:57,600 INFO L231 Difference]: Finished difference. Result has 166 places, 112 transitions, 1420 flow [2023-08-30 04:59:57,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1420, PETRI_PLACES=166, PETRI_TRANSITIONS=112} [2023-08-30 04:59:57,601 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2023-08-30 04:59:57,601 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 112 transitions, 1420 flow [2023-08-30 04:59:57,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 195.22222222222223) internal successors, (1757), 9 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:57,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:57,601 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:57,610 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 (54)] Ended with exit code 0 [2023-08-30 04:59:57,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:57,802 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 04:59:57,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:57,803 INFO L85 PathProgramCache]: Analyzing trace with hash 66230576, now seen corresponding path program 5 times [2023-08-30 04:59:57,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:57,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041161082] [2023-08-30 04:59:57,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 04:59:57,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:57,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:57,804 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:57,805 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 (55)] Waiting until timeout for monitored process [2023-08-30 04:59:58,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 04:59:58,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:59:58,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 04:59:58,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 04:59:58,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:00:01,493 INFO L321 Elim1Store]: treesize reduction 420, result has 66.7 percent of original size [2023-08-30 05:00:01,493 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 146 treesize of output 872 [2023-08-30 05:00:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:00:01,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:01,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041161082] [2023-08-30 05:00:01,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041161082] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:00:01,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:00:01,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2023-08-30 05:00:01,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327421166] [2023-08-30 05:00:01,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:00:01,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 05:00:01,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 05:00:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-08-30 05:00:04,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 476 [2023-08-30 05:00:04,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 112 transitions, 1420 flow. Second operand has 13 states, 13 states have (on average 195.69230769230768) internal successors, (2544), 13 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:04,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:04,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 476 [2023-08-30 05:00:04,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:07,405 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 [] [2023-08-30 05:00:09,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:00:11,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:00:13,267 INFO L130 PetriNetUnfolder]: 4516/7991 cut-off events. [2023-08-30 05:00:13,268 INFO L131 PetriNetUnfolder]: For 43041/43043 co-relation queries the response was YES. [2023-08-30 05:00:13,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33092 conditions, 7991 events. 4516/7991 cut-off events. For 43041/43043 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 52484 event pairs, 680 based on Foata normal form. 42/8033 useless extension candidates. Maximal degree in co-relation 33027. Up to 6450 conditions per place. [2023-08-30 05:00:13,320 INFO L137 encePairwiseOnDemand]: 467/476 looper letters, 161 selfloop transitions, 19 changer transitions 4/185 dead transitions. [2023-08-30 05:00:13,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 185 transitions, 2283 flow [2023-08-30 05:00:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:00:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:00:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1617 transitions. [2023-08-30 05:00:13,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42463235294117646 [2023-08-30 05:00:13,323 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1617 transitions. [2023-08-30 05:00:13,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1617 transitions. [2023-08-30 05:00:13,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:13,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1617 transitions. [2023-08-30 05:00:13,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.125) internal successors, (1617), 8 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:13,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:13,326 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:13,326 INFO L175 Difference]: Start difference. First operand has 166 places, 112 transitions, 1420 flow. Second operand 8 states and 1617 transitions. [2023-08-30 05:00:13,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 185 transitions, 2283 flow [2023-08-30 05:00:13,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 185 transitions, 2232 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 05:00:13,422 INFO L231 Difference]: Finished difference. Result has 170 places, 113 transitions, 1434 flow [2023-08-30 05:00:13,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1434, PETRI_PLACES=170, PETRI_TRANSITIONS=113} [2023-08-30 05:00:13,422 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2023-08-30 05:00:13,422 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 113 transitions, 1434 flow [2023-08-30 05:00:13,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.69230769230768) internal successors, (2544), 13 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:13,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:13,423 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:13,436 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 (55)] Forceful destruction successful, exit code 0 [2023-08-30 05:00:13,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:13,624 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:00:13,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash 452487728, now seen corresponding path program 6 times [2023-08-30 05:00:13,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:13,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6344949] [2023-08-30 05:00:13,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 05:00:13,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:13,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:13,625 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:13,626 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 (56)] Waiting until timeout for monitored process [2023-08-30 05:00:14,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 05:00:14,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:00:14,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:00:14,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:00:14,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:00:18,342 INFO L321 Elim1Store]: treesize reduction 506, result has 65.5 percent of original size [2023-08-30 05:00:18,343 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 257 treesize of output 1005 [2023-08-30 05:00:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:00:18,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:18,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6344949] [2023-08-30 05:00:18,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6344949] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:00:18,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:00:18,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2023-08-30 05:00:18,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19213708] [2023-08-30 05:00:18,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:00:18,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 05:00:18,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:18,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 05:00:18,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-30 05:00:21,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 476 [2023-08-30 05:00:21,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 113 transitions, 1434 flow. Second operand has 13 states, 13 states have (on average 195.69230769230768) internal successors, (2544), 13 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:21,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:21,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 476 [2023-08-30 05:00:21,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:23,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:00:26,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 05:00:27,759 INFO L130 PetriNetUnfolder]: 4348/7735 cut-off events. [2023-08-30 05:00:27,760 INFO L131 PetriNetUnfolder]: For 43187/43189 co-relation queries the response was YES. [2023-08-30 05:00:27,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31412 conditions, 7735 events. 4348/7735 cut-off events. For 43187/43189 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 49343 event pairs, 3271 based on Foata normal form. 42/7777 useless extension candidates. Maximal degree in co-relation 31346. Up to 6892 conditions per place. [2023-08-30 05:00:27,824 INFO L137 encePairwiseOnDemand]: 467/476 looper letters, 125 selfloop transitions, 29 changer transitions 2/157 dead transitions. [2023-08-30 05:00:27,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 157 transitions, 2010 flow [2023-08-30 05:00:27,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:00:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:00:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1611 transitions. [2023-08-30 05:00:27,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230567226890756 [2023-08-30 05:00:27,827 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1611 transitions. [2023-08-30 05:00:27,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1611 transitions. [2023-08-30 05:00:27,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:27,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1611 transitions. [2023-08-30 05:00:27,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 201.375) internal successors, (1611), 8 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:27,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:27,830 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 476.0) internal successors, (4284), 9 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:27,830 INFO L175 Difference]: Start difference. First operand has 170 places, 113 transitions, 1434 flow. Second operand 8 states and 1611 transitions. [2023-08-30 05:00:27,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 157 transitions, 2010 flow [2023-08-30 05:00:27,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 157 transitions, 1919 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-30 05:00:27,921 INFO L231 Difference]: Finished difference. Result has 171 places, 114 transitions, 1415 flow [2023-08-30 05:00:27,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1415, PETRI_PLACES=171, PETRI_TRANSITIONS=114} [2023-08-30 05:00:27,922 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2023-08-30 05:00:27,922 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 114 transitions, 1415 flow [2023-08-30 05:00:27,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.69230769230768) internal successors, (2544), 13 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:27,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:27,922 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:27,934 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 (56)] Forceful destruction successful, exit code 0 [2023-08-30 05:00:28,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:28,123 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:00:28,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:28,123 INFO L85 PathProgramCache]: Analyzing trace with hash 151703648, now seen corresponding path program 3 times [2023-08-30 05:00:28,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:28,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310304777] [2023-08-30 05:00:28,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:00:28,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:28,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:28,124 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:28,125 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 (57)] Waiting until timeout for monitored process [2023-08-30 05:00:29,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 05:00:29,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:00:29,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 05:00:29,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:29,435 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:00:29,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:00:29,473 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:00:29,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:00:29,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:00:29,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:00:29,529 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:00:29,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:00:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-30 05:00:29,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:00:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-30 05:00:29,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:29,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310304777] [2023-08-30 05:00:29,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310304777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:00:29,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:00:29,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-08-30 05:00:29,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288731266] [2023-08-30 05:00:29,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:00:30,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 05:00:30,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:30,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 05:00:30,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-08-30 05:00:35,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 476 [2023-08-30 05:00:35,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 114 transitions, 1415 flow. Second operand has 18 states, 18 states have (on average 191.77777777777777) internal successors, (3452), 18 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:35,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:35,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 476 [2023-08-30 05:00:35,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:37,205 INFO L130 PetriNetUnfolder]: 2207/4004 cut-off events. [2023-08-30 05:00:37,205 INFO L131 PetriNetUnfolder]: For 17258/17260 co-relation queries the response was YES. [2023-08-30 05:00:37,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16349 conditions, 4004 events. 2207/4004 cut-off events. For 17258/17260 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 24231 event pairs, 152 based on Foata normal form. 124/4128 useless extension candidates. Maximal degree in co-relation 16284. Up to 817 conditions per place. [2023-08-30 05:00:37,232 INFO L137 encePairwiseOnDemand]: 472/476 looper letters, 261 selfloop transitions, 20 changer transitions 2/284 dead transitions. [2023-08-30 05:00:37,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 284 transitions, 3552 flow [2023-08-30 05:00:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 05:00:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 05:00:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2017 transitions. [2023-08-30 05:00:37,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4237394957983193 [2023-08-30 05:00:37,235 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2017 transitions. [2023-08-30 05:00:37,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2017 transitions. [2023-08-30 05:00:37,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:37,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2017 transitions. [2023-08-30 05:00:37,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 201.7) internal successors, (2017), 10 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:37,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:37,239 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 476.0) internal successors, (5236), 11 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:37,239 INFO L175 Difference]: Start difference. First operand has 171 places, 114 transitions, 1415 flow. Second operand 10 states and 2017 transitions. [2023-08-30 05:00:37,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 284 transitions, 3552 flow [2023-08-30 05:00:37,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 284 transitions, 3393 flow, removed 37 selfloop flow, removed 12 redundant places. [2023-08-30 05:00:37,284 INFO L231 Difference]: Finished difference. Result has 161 places, 107 transitions, 1301 flow [2023-08-30 05:00:37,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1301, PETRI_PLACES=161, PETRI_TRANSITIONS=107} [2023-08-30 05:00:37,285 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 106 predicate places. [2023-08-30 05:00:37,285 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 107 transitions, 1301 flow [2023-08-30 05:00:37,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 191.77777777777777) internal successors, (3452), 18 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:37,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:37,285 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:37,301 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 (57)] Ended with exit code 0 [2023-08-30 05:00:37,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:37,488 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-30 05:00:37,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:37,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1304218864, now seen corresponding path program 7 times [2023-08-30 05:00:37,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:37,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339214313] [2023-08-30 05:00:37,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 05:00:37,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:37,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:37,490 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:37,490 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 (58)] Waiting until timeout for monitored process [2023-08-30 05:00:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:00:38,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 05:00:38,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:38,010 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 [2023-08-30 05:00:38,080 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 [2023-08-30 05:00:38,155 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 32 treesize of output 28 [2023-08-30 05:00:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 05:00:38,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:00:38,830 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3767 (Array (_ BitVec 32) (_ BitVec 8))) (~scoreB~0.base (_ BitVec 32))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3767))) (let ((.cse2 (select .cse5 ~scoreB~0.base))) (let ((.cse0 (concat (concat (concat (select .cse2 (bvadd (_ bv3 32) c_~scoreB~0.offset)) (select .cse2 (bvadd (_ bv2 32) c_~scoreB~0.offset))) (select .cse2 (bvadd (_ bv1 32) c_~scoreB~0.offset))) (select .cse2 c_~scoreB~0.offset))) (.cse1 (let ((.cse4 (select .cse5 c_~scoreA~0.base))) (concat (concat (concat (select .cse4 (bvadd (_ bv3 32) c_~scoreA~0.offset)) (select .cse4 (bvadd (_ bv2 32) c_~scoreA~0.offset))) (select .cse4 (bvadd c_~scoreA~0.offset (_ bv1 32)))) (select .cse4 c_~scoreA~0.offset))))) (or (bvsgt .cse0 .cse1) (not (bvslt |c_thread1Thread1of1ForFork0_#t~mem1#1| (let ((.cse3 (bvmul (_ bv4 32) |c_thread1Thread1of1ForFork0_~i~0#1|))) (concat (concat (concat (select .cse2 (bvadd (_ bv3 32) .cse3 c_~scoreB~0.offset)) (select .cse2 (bvadd (_ bv2 32) .cse3 c_~scoreB~0.offset))) (select .cse2 (bvadd .cse3 (_ bv1 32) c_~scoreB~0.offset))) (select .cse2 (bvadd .cse3 c_~scoreB~0.offset)))))) (bvslt .cse0 .cse1)))))) is different from false [2023-08-30 05:00:38,913 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3767 (Array (_ BitVec 32) (_ BitVec 8))) (~scoreB~0.base (_ BitVec 32))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3767))) (let ((.cse4 (select .cse6 ~scoreB~0.base))) (let ((.cse0 (concat (concat (concat (select .cse4 (bvadd (_ bv3 32) c_~scoreB~0.offset)) (select .cse4 (bvadd (_ bv2 32) c_~scoreB~0.offset))) (select .cse4 (bvadd (_ bv1 32) c_~scoreB~0.offset))) (select .cse4 c_~scoreB~0.offset))) (.cse1 (let ((.cse5 (select .cse6 c_~scoreA~0.base))) (concat (concat (concat (select .cse5 (bvadd (_ bv3 32) c_~scoreA~0.offset)) (select .cse5 (bvadd (_ bv2 32) c_~scoreA~0.offset))) (select .cse5 (bvadd c_~scoreA~0.offset (_ bv1 32)))) (select .cse5 c_~scoreA~0.offset))))) (or (bvsgt .cse0 .cse1) (bvslt .cse0 .cse1) (not (let ((.cse3 (bvmul (_ bv4 32) |c_thread1Thread1of1ForFork0_~i~0#1|))) (bvslt (let ((.cse2 (select |c_#memory_int| c_~scoreA~0.base))) (concat (concat (concat (select .cse2 (bvadd (_ bv3 32) c_~scoreA~0.offset .cse3)) (select .cse2 (bvadd (_ bv2 32) c_~scoreA~0.offset .cse3))) (select .cse2 (bvadd c_~scoreA~0.offset .cse3 (_ bv1 32)))) (select .cse2 (bvadd c_~scoreA~0.offset .cse3)))) (concat (concat (concat (select .cse4 (bvadd (_ bv3 32) .cse3 c_~scoreB~0.offset)) (select .cse4 (bvadd (_ bv2 32) .cse3 c_~scoreB~0.offset))) (select .cse4 (bvadd .cse3 (_ bv1 32) c_~scoreB~0.offset))) (select .cse4 (bvadd .cse3 c_~scoreB~0.offset))))))))))) is different from false [2023-08-30 05:00:39,026 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3767 (Array (_ BitVec 32) (_ BitVec 8))) (~scoreB~0.base (_ BitVec 32))) (let ((.cse3 (bvadd (_ bv3 32) c_~scoreA~0.offset)) (.cse4 (bvadd (_ bv2 32) c_~scoreA~0.offset)) (.cse5 (bvadd c_~scoreA~0.offset (_ bv1 32))) (.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3767))) (let ((.cse1 (let ((.cse8 (select .cse7 c_~scoreA~0.base))) (concat (concat (concat (select .cse8 .cse3) (select .cse8 .cse4)) (select .cse8 .cse5)) (select .cse8 c_~scoreA~0.offset)))) (.cse0 (let ((.cse6 (select .cse7 ~scoreB~0.base))) (concat (concat (concat (select .cse6 (bvadd (_ bv3 32) c_~scoreB~0.offset)) (select .cse6 (bvadd (_ bv2 32) c_~scoreB~0.offset))) (select .cse6 (bvadd (_ bv1 32) c_~scoreB~0.offset))) (select .cse6 c_~scoreB~0.offset))))) (or (bvsgt .cse0 .cse1) (bvslt .cse0 .cse1) (not (bvslt (let ((.cse2 (select |c_#memory_int| c_~scoreA~0.base))) (concat (concat (concat (select .cse2 .cse3) (select .cse2 .cse4)) (select .cse2 .cse5)) (select .cse2 c_~scoreA~0.offset))) .cse0)))))) is different from false [2023-08-30 05:00:39,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:00:39,830 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 4577 treesize of output 3809 [2023-08-30 05:00:40,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:00:40,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 1789 treesize of output 1633 [2023-08-30 05:00:40,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:00:40,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 1481 treesize of output 1129 [2023-08-30 05:04:57,440 WARN L222 SmtUtils]: Spent 7.52s on a formula simplification. DAG size of input: 1170 DAG size of output: 1379 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 05:08:19,270 WARN L222 SmtUtils]: Spent 7.37s on a formula simplification. DAG size of input: 1120 DAG size of output: 1367 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15