./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-min-array-hom.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/popl20-more-min-array-hom.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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --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 06:44:30,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:44:30,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:44:31,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:44:31,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:44:31,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:44:31,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:44:31,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:44:31,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:44:31,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:44:31,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:44:31,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:44:31,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:44:31,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:44:31,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:44:31,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:44:31,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:44:31,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:44:31,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:44:31,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:44:31,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:44:31,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:44:31,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:44:31,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:44:31,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:44:31,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:44:31,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:44:31,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:44:31,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:44:31,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:44:31,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:44:31,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:44:31,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:44:31,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:44:31,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:44:31,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:44:31,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:44:31,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:44:31,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:44:31,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:44:31,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:44:31,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:44:31,126 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:44:31,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:44:31,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:44:31,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:44:31,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:44:31,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:44:31,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:44:31,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:44:31,130 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:44:31,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:44:31,131 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:44:31,131 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:44:31,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:44:31,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:44:31,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:44:31,132 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:44:31,132 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:44:31,132 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:44:31,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:44:31,132 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:44:31,133 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:44:31,133 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:44:31,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:44:31,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:44:31,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:44:31,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:44:31,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:44:31,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:44:31,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:44:31,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:44:31,135 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:44:31,135 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:44:31,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:44:31,135 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:44:31,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:44:31,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:44:31,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:44:31,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:44:31,453 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:44:31,454 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:44:31,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2023-08-30 06:44:32,708 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:44:32,881 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:44:32,882 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2023-08-30 06:44:32,889 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/376568131/97fa4ab369b44849856d9f13f7c4c008/FLAG7763bc07a [2023-08-30 06:44:32,911 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/376568131/97fa4ab369b44849856d9f13f7c4c008 [2023-08-30 06:44:32,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:44:32,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:44:32,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:44:32,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:44:32,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:44:32,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:44:32" (1/1) ... [2023-08-30 06:44:32,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14441cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:32, skipping insertion in model container [2023-08-30 06:44:32,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:44:32" (1/1) ... [2023-08-30 06:44:32,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:44:32,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:44:33,084 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2023-08-30 06:44:33,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:44:33,103 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 06:44:33,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d2edbec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:33, skipping insertion in model container [2023-08-30 06:44:33,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:44:33,104 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:44:33,106 INFO L158 Benchmark]: Toolchain (without parser) took 190.41ms. Allocated memory is still 81.8MB. Free memory was 62.6MB in the beginning and 53.0MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:44:33,106 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 65.0MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:44:33,107 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.49ms. Allocated memory is still 81.8MB. Free memory was 62.6MB in the beginning and 53.0MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:44:33,108 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 65.0MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 188.49ms. Allocated memory is still 81.8MB. Free memory was 62.6MB in the beginning and 53.0MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-min-array-hom.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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --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 06:44:34,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:44:34,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:44:34,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:44:34,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:44:34,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:44:34,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:44:34,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:44:34,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:44:34,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:44:34,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:44:34,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:44:34,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:44:34,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:44:34,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:44:34,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:44:34,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:44:34,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:44:34,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:44:34,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:44:34,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:44:34,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:44:34,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:44:34,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:44:34,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:44:34,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:44:34,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:44:34,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:44:34,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:44:34,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:44:34,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:44:34,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:44:34,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:44:34,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:44:34,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:44:34,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:44:34,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:44:34,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:44:34,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:44:34,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:44:34,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:44:34,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:44:35,013 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:44:35,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:44:35,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:44:35,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:44:35,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:44:35,016 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:44:35,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:44:35,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:44:35,017 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:44:35,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:44:35,018 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:44:35,018 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:44:35,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:44:35,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:44:35,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:44:35,018 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:44:35,019 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:44:35,019 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:44:35,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:44:35,019 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:44:35,019 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:44:35,019 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:44:35,020 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:44:35,020 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:44:35,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:44:35,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:44:35,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:44:35,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:44:35,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:44:35,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:44:35,021 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:44:35,021 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:44:35,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:44:35,022 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:44:35,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:44:35,022 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:44:35,022 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:44:35,022 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:44:35,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:44:35,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:44:35,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:44:35,327 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:44:35,328 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:44:35,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2023-08-30 06:44:36,573 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:44:36,773 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:44:36,774 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2023-08-30 06:44:36,781 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fff8574f5/fc631bd1d3e9471e9e10b2483f0965ce/FLAGbe1691403 [2023-08-30 06:44:36,793 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fff8574f5/fc631bd1d3e9471e9e10b2483f0965ce [2023-08-30 06:44:36,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:44:36,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:44:36,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:44:36,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:44:36,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:44:36,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:44:36" (1/1) ... [2023-08-30 06:44:36,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b80d3e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:36, skipping insertion in model container [2023-08-30 06:44:36,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:44:36" (1/1) ... [2023-08-30 06:44:36,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:44:36,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:44:36,970 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2023-08-30 06:44:36,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:44:36,991 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:44:36,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:44:37,011 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2023-08-30 06:44:37,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:44:37,044 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:44:37,072 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2023-08-30 06:44:37,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:44:37,096 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:44:37,096 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:44:37,102 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:44:37,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37 WrapperNode [2023-08-30 06:44:37,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:44:37,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:44:37,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:44:37,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:44:37,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (1/1) ... [2023-08-30 06:44:37,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (1/1) ... [2023-08-30 06:44:37,153 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2023-08-30 06:44:37,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:44:37,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:44:37,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:44:37,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:44:37,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (1/1) ... [2023-08-30 06:44:37,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (1/1) ... [2023-08-30 06:44:37,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (1/1) ... [2023-08-30 06:44:37,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (1/1) ... [2023-08-30 06:44:37,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (1/1) ... [2023-08-30 06:44:37,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (1/1) ... [2023-08-30 06:44:37,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (1/1) ... [2023-08-30 06:44:37,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (1/1) ... [2023-08-30 06:44:37,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:44:37,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:44:37,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:44:37,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:44:37,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (1/1) ... [2023-08-30 06:44:37,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:44:37,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:44:37,250 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 06:44:37,277 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 06:44:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:44:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:44:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:44:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:44:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:44:37,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:44:37,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:44:37,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:44:37,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:44:37,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:44:37,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:44:37,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:44:37,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:44:37,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:44:37,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:44:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:44:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:44:37,293 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 06:44:37,416 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:44:37,417 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:44:37,944 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:44:38,084 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:44:38,084 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 06:44:38,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:44:38 BoogieIcfgContainer [2023-08-30 06:44:38,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:44:38,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:44:38,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:44:38,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:44:38,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:44:36" (1/3) ... [2023-08-30 06:44:38,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d215d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:44:38, skipping insertion in model container [2023-08-30 06:44:38,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:44:37" (2/3) ... [2023-08-30 06:44:38,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d215d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:44:38, skipping insertion in model container [2023-08-30 06:44:38,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:44:38" (3/3) ... [2023-08-30 06:44:38,101 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2023-08-30 06:44:38,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:44:38,123 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 06:44:38,123 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:44:38,258 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:44:38,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 172 transitions, 368 flow [2023-08-30 06:44:38,429 INFO L130 PetriNetUnfolder]: 12/169 cut-off events. [2023-08-30 06:44:38,429 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:44:38,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 169 events. 12/169 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-30 06:44:38,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 172 transitions, 368 flow [2023-08-30 06:44:38,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 165 transitions, 348 flow [2023-08-30 06:44:38,449 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:44:38,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 165 transitions, 348 flow [2023-08-30 06:44:38,471 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 165 transitions, 348 flow [2023-08-30 06:44:38,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 165 transitions, 348 flow [2023-08-30 06:44:38,526 INFO L130 PetriNetUnfolder]: 12/165 cut-off events. [2023-08-30 06:44:38,527 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:44:38,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 165 events. 12/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-30 06:44:38,531 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-30 06:44:54,334 INFO L134 LiptonReduction]: Checked pairs total: 3400 [2023-08-30 06:44:54,334 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-30 06:44:54,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:44:54,351 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;@30a6e0d9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:44:54,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-08-30 06:44:54,360 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:44:54,361 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:44:54,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:54,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:44:54,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:54,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:54,366 INFO L85 PathProgramCache]: Analyzing trace with hash 22228, now seen corresponding path program 1 times [2023-08-30 06:44:54,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:54,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754880880] [2023-08-30 06:44:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:54,377 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 06:44:54,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:54,383 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 06:44:54,384 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 06:44:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:54,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:44:54,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:54,705 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:54,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:54,745 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 06:44:54,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:54,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:54,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754880880] [2023-08-30 06:44:54,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754880880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:54,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:54,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:54,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855525521] [2023-08-30 06:44:54,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:54,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:54,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:54,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:54,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:54,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 06:44:54,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:54,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:54,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 06:44:54,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:55,962 INFO L130 PetriNetUnfolder]: 5471/6966 cut-off events. [2023-08-30 06:44:55,963 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-08-30 06:44:55,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14066 conditions, 6966 events. 5471/6966 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 31692 event pairs, 2601 based on Foata normal form. 0/1882 useless extension candidates. Maximal degree in co-relation 6096. Up to 3485 conditions per place. [2023-08-30 06:44:56,016 INFO L137 encePairwiseOnDemand]: 323/333 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 06:44:56,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2023-08-30 06:44:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-30 06:44:56,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-08-30 06:44:56,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-30 06:44:56,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-30 06:44:56,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:56,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-30 06:44:56,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:56,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:56,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:56,057 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 518 transitions. [2023-08-30 06:44:56,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2023-08-30 06:44:56,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:44:56,067 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2023-08-30 06:44:56,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-30 06:44:56,077 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-08-30 06:44:56,077 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2023-08-30 06:44:56,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:56,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:56,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:44:56,090 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 (2)] Ended with exit code 0 [2023-08-30 06:44:56,287 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 06:44:56,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:56,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash 22299, now seen corresponding path program 1 times [2023-08-30 06:44:56,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:56,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131356836] [2023-08-30 06:44:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:56,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:56,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:56,291 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 06:44:56,297 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 06:44:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:56,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:44:56,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:56,386 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 06:44:56,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:56,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131356836] [2023-08-30 06:44:56,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131356836] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:56,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:56,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:56,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787416762] [2023-08-30 06:44:56,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:56,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:56,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:56,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:56,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:56,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 333 [2023-08-30 06:44:56,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:56,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:56,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 333 [2023-08-30 06:44:56,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:56,901 INFO L130 PetriNetUnfolder]: 2765/3515 cut-off events. [2023-08-30 06:44:56,901 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 06:44:56,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 3515 events. 2765/3515 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 14341 event pairs, 1310 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 7031. Up to 3488 conditions per place. [2023-08-30 06:44:56,922 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-30 06:44:56,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 194 flow [2023-08-30 06:44:56,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-30 06:44:56,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754754754754755 [2023-08-30 06:44:56,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-30 06:44:56,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-30 06:44:56,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:56,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-30 06:44:56,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:56,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:56,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:56,931 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 475 transitions. [2023-08-30 06:44:56,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 194 flow [2023-08-30 06:44:56,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:44:56,934 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 116 flow [2023-08-30 06:44:56,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-30 06:44:56,935 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2023-08-30 06:44:56,935 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 116 flow [2023-08-30 06:44:56,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:56,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:56,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:44:56,952 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 06:44:57,152 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 06:44:57,153 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:57,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash 22229, now seen corresponding path program 1 times [2023-08-30 06:44:57,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:57,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084222518] [2023-08-30 06:44:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:57,155 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 06:44:57,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:57,156 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 06:44:57,159 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 06:44:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:57,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:44:57,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:57,269 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:44:57,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:44:57,283 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 06:44:57,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:57,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:57,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084222518] [2023-08-30 06:44:57,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084222518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:57,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:57,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:44:57,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963975228] [2023-08-30 06:44:57,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:57,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:44:57,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:44:57,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:44:57,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 06:44:57,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:57,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:57,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 06:44:57,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:57,736 INFO L130 PetriNetUnfolder]: 2765/3513 cut-off events. [2023-08-30 06:44:57,736 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 06:44:57,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7046 conditions, 3513 events. 2765/3513 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 14348 event pairs, 1310 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 7032. Up to 3487 conditions per place. [2023-08-30 06:44:57,754 INFO L137 encePairwiseOnDemand]: 331/333 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-30 06:44:57,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 196 flow [2023-08-30 06:44:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:44:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:44:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-30 06:44:57,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644644644644645 [2023-08-30 06:44:57,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-30 06:44:57,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-30 06:44:57,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:57,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-30 06:44:57,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:57,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:57,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:57,761 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 116 flow. Second operand 3 states and 464 transitions. [2023-08-30 06:44:57,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 196 flow [2023-08-30 06:44:57,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 06:44:57,763 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 110 flow [2023-08-30 06:44:57,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-30 06:44:57,764 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-08-30 06:44:57,764 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 110 flow [2023-08-30 06:44:57,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:57,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:57,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:44:57,776 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 06:44:57,973 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 06:44:57,974 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:44:57,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:57,974 INFO L85 PathProgramCache]: Analyzing trace with hash 691115, now seen corresponding path program 1 times [2023-08-30 06:44:57,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:57,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381602012] [2023-08-30 06:44:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:57,975 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 06:44:57,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:57,976 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 06:44:57,978 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 06:44:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:58,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:44:58,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:58,150 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:44:58,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:44:58,220 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 06:44:58,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:58,421 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 06:44:58,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:58,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381602012] [2023-08-30 06:44:58,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381602012] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:58,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:58,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:44:58,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296776164] [2023-08-30 06:44:58,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:58,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:44:58,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:58,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:44:58,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:44:59,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 06:44:59,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:59,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:59,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 06:44:59,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:00,099 INFO L130 PetriNetUnfolder]: 5477/6973 cut-off events. [2023-08-30 06:45:00,100 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 06:45:00,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 6973 events. 5477/6973 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 31537 event pairs, 2601 based on Foata normal form. 0/1889 useless extension candidates. Maximal degree in co-relation 13967. Up to 3484 conditions per place. [2023-08-30 06:45:00,140 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 76 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2023-08-30 06:45:00,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 406 flow [2023-08-30 06:45:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:45:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:45:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 906 transitions. [2023-08-30 06:45:00,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45345345345345345 [2023-08-30 06:45:00,145 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 906 transitions. [2023-08-30 06:45:00,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 906 transitions. [2023-08-30 06:45:00,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:00,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 906 transitions. [2023-08-30 06:45:00,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:00,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:00,152 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:00,152 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 110 flow. Second operand 6 states and 906 transitions. [2023-08-30 06:45:00,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 406 flow [2023-08-30 06:45:00,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 90 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:45:00,156 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 207 flow [2023-08-30 06:45:00,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-08-30 06:45:00,157 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2023-08-30 06:45:00,157 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 207 flow [2023-08-30 06:45:00,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:00,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:00,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:45:00,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-30 06:45:00,367 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 06:45:00,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:00,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:00,368 INFO L85 PathProgramCache]: Analyzing trace with hash 691186, now seen corresponding path program 1 times [2023-08-30 06:45:00,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:00,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119049381] [2023-08-30 06:45:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:00,368 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 06:45:00,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:00,369 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 06:45:00,372 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 06:45:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:00,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:45:00,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:00,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:00,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:00,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:00,531 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 06:45:00,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2023-08-30 06:45:00,555 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:45:00,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:45:00,620 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 06:45:00,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:00,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:00,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119049381] [2023-08-30 06:45:00,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119049381] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 06:45:00,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 06:45:00,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-30 06:45:00,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637226426] [2023-08-30 06:45:00,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:45:00,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:45:00,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:00,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:45:00,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:45:01,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 06:45:01,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:01,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:01,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 06:45:01,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:01,655 INFO L130 PetriNetUnfolder]: 4373/5617 cut-off events. [2023-08-30 06:45:01,655 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 06:45:01,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11297 conditions, 5617 events. 4373/5617 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 25204 event pairs, 2060 based on Foata normal form. 0/1567 useless extension candidates. Maximal degree in co-relation 11283. Up to 5565 conditions per place. [2023-08-30 06:45:01,687 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-30 06:45:01,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 273 flow [2023-08-30 06:45:01,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:45:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:45:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-30 06:45:01,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394394394394394 [2023-08-30 06:45:01,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-30 06:45:01,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-30 06:45:01,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:01,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-30 06:45:01,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:01,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:01,695 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:01,695 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 207 flow. Second operand 3 states and 439 transitions. [2023-08-30 06:45:01,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 273 flow [2023-08-30 06:45:01,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 255 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 06:45:01,701 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 165 flow [2023-08-30 06:45:01,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-30 06:45:01,703 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-30 06:45:01,704 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 165 flow [2023-08-30 06:45:01,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:01,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:01,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:45:01,713 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 06:45:01,913 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 06:45:01,914 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:01,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:01,914 INFO L85 PathProgramCache]: Analyzing trace with hash 691187, now seen corresponding path program 1 times [2023-08-30 06:45:01,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:01,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736677862] [2023-08-30 06:45:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:01,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:01,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:01,916 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 06:45:01,917 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 (7)] Waiting until timeout for monitored process [2023-08-30 06:45:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:01,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:45:01,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:02,059 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 06:45:02,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 06:45:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:45:02,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:45:02,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:02,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736677862] [2023-08-30 06:45:02,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736677862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:45:02,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:45:02,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:45:02,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348065011] [2023-08-30 06:45:02,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:45:02,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:45:02,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:02,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:45:02,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:45:02,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 06:45:02,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:02,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:02,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 06:45:02,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:02,700 INFO L130 PetriNetUnfolder]: 3211/4203 cut-off events. [2023-08-30 06:45:02,700 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 06:45:02,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8452 conditions, 4203 events. 3211/4203 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 18838 event pairs, 1500 based on Foata normal form. 0/1307 useless extension candidates. Maximal degree in co-relation 8437. Up to 4151 conditions per place. [2023-08-30 06:45:02,725 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 06:45:02,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 227 flow [2023-08-30 06:45:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:45:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:45:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-30 06:45:02,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146146146146144 [2023-08-30 06:45:02,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-30 06:45:02,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-30 06:45:02,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:02,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-30 06:45:02,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:02,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:02,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:02,731 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 165 flow. Second operand 3 states and 461 transitions. [2023-08-30 06:45:02,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 227 flow [2023-08-30 06:45:02,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:45:02,733 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 144 flow [2023-08-30 06:45:02,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=52, 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=144, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-30 06:45:02,734 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-30 06:45:02,734 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 144 flow [2023-08-30 06:45:02,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:02,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:02,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:45:02,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:45:02,944 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 06:45:02,944 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:02,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash 664247777, now seen corresponding path program 1 times [2023-08-30 06:45:02,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:02,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863377593] [2023-08-30 06:45:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:02,945 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 06:45:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:02,946 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 06:45:02,948 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 06:45:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 06:45:03,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:03,089 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2023-08-30 06:45:03,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2023-08-30 06:45:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:45:03,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:45:03,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:03,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863377593] [2023-08-30 06:45:03,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863377593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:45:03,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:45:03,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:45:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29289377] [2023-08-30 06:45:03,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:45:03,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:45:03,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:03,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:45:03,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:45:03,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 06:45:03,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:03,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:03,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 06:45:03,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:03,542 INFO L130 PetriNetUnfolder]: 3037/3969 cut-off events. [2023-08-30 06:45:03,543 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 06:45:03,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7985 conditions, 3969 events. 3037/3969 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 17528 event pairs, 1414 based on Foata normal form. 0/1263 useless extension candidates. Maximal degree in co-relation 7969. Up to 3917 conditions per place. [2023-08-30 06:45:03,567 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-30 06:45:03,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 220 flow [2023-08-30 06:45:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:45:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:45:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-30 06:45:03,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45045045045045046 [2023-08-30 06:45:03,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-30 06:45:03,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-30 06:45:03,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:03,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-30 06:45:03,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:03,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:03,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:03,572 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 144 flow. Second operand 3 states and 450 transitions. [2023-08-30 06:45:03,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 220 flow [2023-08-30 06:45:03,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 43 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:45:03,574 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 141 flow [2023-08-30 06:45:03,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-30 06:45:03,574 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-08-30 06:45:03,575 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 141 flow [2023-08-30 06:45:03,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:03,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:03,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:45:03,584 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 06:45:03,784 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 06:45:03,784 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:03,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:03,785 INFO L85 PathProgramCache]: Analyzing trace with hash 664247778, now seen corresponding path program 1 times [2023-08-30 06:45:03,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:03,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361499432] [2023-08-30 06:45:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:03,785 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 06:45:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:03,787 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 06:45:03,789 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 06:45:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:03,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:45:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:03,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:45:03,973 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-30 06:45:03,974 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 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-30 06:45:03,986 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 06:45:04,183 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 06:45:04,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:04,349 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 06:45:04,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:04,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361499432] [2023-08-30 06:45:04,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361499432] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:04,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:04,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:45:04,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973959264] [2023-08-30 06:45:04,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:04,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:45:04,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:04,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:45:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:45:06,355 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 06:45:07,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:45:07,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 141 flow. Second operand has 8 states, 8 states have (on average 133.25) internal successors, (1066), 8 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:07,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:07,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:45:07,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:08,230 INFO L130 PetriNetUnfolder]: 2815/3687 cut-off events. [2023-08-30 06:45:08,230 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 06:45:08,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7417 conditions, 3687 events. 2815/3687 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 16184 event pairs, 1319 based on Foata normal form. 0/1242 useless extension candidates. Maximal degree in co-relation 7400. Up to 1838 conditions per place. [2023-08-30 06:45:08,246 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 64 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-30 06:45:08,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 341 flow [2023-08-30 06:45:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:45:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:45:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 727 transitions. [2023-08-30 06:45:08,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43663663663663665 [2023-08-30 06:45:08,249 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 727 transitions. [2023-08-30 06:45:08,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 727 transitions. [2023-08-30 06:45:08,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:08,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 727 transitions. [2023-08-30 06:45:08,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:08,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:08,254 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:08,254 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 141 flow. Second operand 5 states and 727 transitions. [2023-08-30 06:45:08,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 341 flow [2023-08-30 06:45:08,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:45:08,256 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 142 flow [2023-08-30 06:45:08,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2023-08-30 06:45:08,257 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-30 06:45:08,257 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 142 flow [2023-08-30 06:45:08,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.25) internal successors, (1066), 8 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:08,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:08,258 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:45:08,274 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 06:45:08,467 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 06:45:08,467 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:08,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:08,468 INFO L85 PathProgramCache]: Analyzing trace with hash -883796844, now seen corresponding path program 2 times [2023-08-30 06:45:08,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:08,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845995342] [2023-08-30 06:45:08,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:45:08,468 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 06:45:08,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:08,474 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 06:45:08,509 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 06:45:08,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:45:08,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:45:08,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:45:08,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:08,690 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:45:08,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:45:08,832 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 06:45:08,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:09,373 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 06:45:09,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:09,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845995342] [2023-08-30 06:45:09,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845995342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:09,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:09,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:45:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128037600] [2023-08-30 06:45:09,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:09,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:45:09,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:45:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:45:12,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 06:45:12,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 142 flow. Second operand has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:12,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:12,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 06:45:12,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:16,658 INFO L130 PetriNetUnfolder]: 12488/16397 cut-off events. [2023-08-30 06:45:16,658 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-08-30 06:45:16,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32864 conditions, 16397 events. 12488/16397 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 85941 event pairs, 5904 based on Foata normal form. 6/5649 useless extension candidates. Maximal degree in co-relation 32846. Up to 1838 conditions per place. [2023-08-30 06:45:16,776 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 263 selfloop transitions, 12 changer transitions 0/278 dead transitions. [2023-08-30 06:45:16,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 278 transitions, 1268 flow [2023-08-30 06:45:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:45:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:45:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1925 transitions. [2023-08-30 06:45:16,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817317317317317 [2023-08-30 06:45:16,784 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1925 transitions. [2023-08-30 06:45:16,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1925 transitions. [2023-08-30 06:45:16,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:16,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1925 transitions. [2023-08-30 06:45:16,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 160.41666666666666) internal successors, (1925), 12 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:16,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:16,796 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:16,796 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 142 flow. Second operand 12 states and 1925 transitions. [2023-08-30 06:45:16,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 278 transitions, 1268 flow [2023-08-30 06:45:16,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 278 transitions, 1263 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:45:16,802 INFO L231 Difference]: Finished difference. Result has 69 places, 48 transitions, 235 flow [2023-08-30 06:45:16,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=235, PETRI_PLACES=69, PETRI_TRANSITIONS=48} [2023-08-30 06:45:16,803 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2023-08-30 06:45:16,803 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 48 transitions, 235 flow [2023-08-30 06:45:16,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:16,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:16,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:45:16,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:45:17,014 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 06:45:17,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:17,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:17,015 INFO L85 PathProgramCache]: Analyzing trace with hash -883160533, now seen corresponding path program 1 times [2023-08-30 06:45:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:17,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821319903] [2023-08-30 06:45:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:17,016 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 06:45:17,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:17,017 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 06:45:17,110 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 06:45:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:17,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:45:17,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:17,217 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 06:45:17,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:17,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 06:45:17,476 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 06:45:17,477 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:17,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821319903] [2023-08-30 06:45:17,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821319903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:17,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:17,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:45:17,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326160170] [2023-08-30 06:45:17,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:17,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:45:17,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:17,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:45:17,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:45:19,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 06:45:19,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 48 transitions, 235 flow. Second operand has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:19,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:19,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 06:45:19,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:21,385 INFO L130 PetriNetUnfolder]: 19046/25547 cut-off events. [2023-08-30 06:45:21,385 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 06:45:21,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51395 conditions, 25547 events. 19046/25547 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 150364 event pairs, 5962 based on Foata normal form. 0/9605 useless extension candidates. Maximal degree in co-relation 51370. Up to 12945 conditions per place. [2023-08-30 06:45:21,504 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 116 selfloop transitions, 12 changer transitions 0/130 dead transitions. [2023-08-30 06:45:21,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 130 transitions, 677 flow [2023-08-30 06:45:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:45:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:45:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1325 transitions. [2023-08-30 06:45:21,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44210877544210875 [2023-08-30 06:45:21,514 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1325 transitions. [2023-08-30 06:45:21,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1325 transitions. [2023-08-30 06:45:21,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:21,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1325 transitions. [2023-08-30 06:45:21,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.22222222222223) internal successors, (1325), 9 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:21,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:21,525 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:21,525 INFO L175 Difference]: Start difference. First operand has 69 places, 48 transitions, 235 flow. Second operand 9 states and 1325 transitions. [2023-08-30 06:45:21,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 130 transitions, 677 flow [2023-08-30 06:45:21,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 130 transitions, 652 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 06:45:21,531 INFO L231 Difference]: Finished difference. Result has 75 places, 52 transitions, 260 flow [2023-08-30 06:45:21,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2023-08-30 06:45:21,532 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-08-30 06:45:21,533 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 260 flow [2023-08-30 06:45:21,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:21,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:21,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:45:21,544 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 06:45:21,742 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 06:45:21,743 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:21,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:21,743 INFO L85 PathProgramCache]: Analyzing trace with hash -883160534, now seen corresponding path program 1 times [2023-08-30 06:45:21,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:21,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723323432] [2023-08-30 06:45:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:21,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:21,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:21,745 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 06:45:21,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:45:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:21,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:45:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:21,888 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:45:21,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:45:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:45:21,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:45:21,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:21,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723323432] [2023-08-30 06:45:21,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723323432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:45:21,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:45:21,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:45:21,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101954651] [2023-08-30 06:45:21,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:45:21,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:45:21,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:45:21,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:45:22,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 06:45:22,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:22,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:22,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 06:45:22,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:22,940 INFO L130 PetriNetUnfolder]: 8201/11381 cut-off events. [2023-08-30 06:45:22,940 INFO L131 PetriNetUnfolder]: For 2202/2599 co-relation queries the response was YES. [2023-08-30 06:45:22,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25408 conditions, 11381 events. 8201/11381 cut-off events. For 2202/2599 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 64501 event pairs, 4347 based on Foata normal form. 397/6056 useless extension candidates. Maximal degree in co-relation 25380. Up to 11188 conditions per place. [2023-08-30 06:45:22,992 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 39 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-08-30 06:45:22,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 49 transitions, 344 flow [2023-08-30 06:45:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:45:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:45:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 576 transitions. [2023-08-30 06:45:22,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2023-08-30 06:45:22,994 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 576 transitions. [2023-08-30 06:45:22,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 576 transitions. [2023-08-30 06:45:22,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:22,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 576 transitions. [2023-08-30 06:45:22,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:22,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:22,998 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:22,998 INFO L175 Difference]: Start difference. First operand has 75 places, 52 transitions, 260 flow. Second operand 4 states and 576 transitions. [2023-08-30 06:45:22,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 49 transitions, 344 flow [2023-08-30 06:45:23,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 49 transitions, 327 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 06:45:23,003 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 249 flow [2023-08-30 06:45:23,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-30 06:45:23,004 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-08-30 06:45:23,004 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 249 flow [2023-08-30 06:45:23,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:23,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:23,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:23,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:45:23,212 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 06:45:23,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:23,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:23,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1608170044, now seen corresponding path program 1 times [2023-08-30 06:45:23,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:23,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137671375] [2023-08-30 06:45:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:23,214 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 06:45:23,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:23,215 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 06:45:23,215 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 06:45:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:23,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:45:23,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:23,371 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:45:23,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:45:23,596 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 06:45:23,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:23,977 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 06:45:23,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:23,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137671375] [2023-08-30 06:45:23,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137671375] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:23,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:23,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:45:23,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378283106] [2023-08-30 06:45:23,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:23,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:45:23,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:23,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:45:23,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:45:26,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 06:45:26,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 249 flow. Second operand has 10 states, 10 states have (on average 135.4) internal successors, (1354), 10 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:26,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:26,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 06:45:26,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:28,633 INFO L130 PetriNetUnfolder]: 15014/19985 cut-off events. [2023-08-30 06:45:28,633 INFO L131 PetriNetUnfolder]: For 2397/2397 co-relation queries the response was YES. [2023-08-30 06:45:28,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46038 conditions, 19985 events. 15014/19985 cut-off events. For 2397/2397 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 112111 event pairs, 972 based on Foata normal form. 450/11453 useless extension candidates. Maximal degree in co-relation 46011. Up to 6057 conditions per place. [2023-08-30 06:45:28,738 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 98 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2023-08-30 06:45:28,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 630 flow [2023-08-30 06:45:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:45:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:45:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1173 transitions. [2023-08-30 06:45:28,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403153153153153 [2023-08-30 06:45:28,743 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1173 transitions. [2023-08-30 06:45:28,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1173 transitions. [2023-08-30 06:45:28,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:28,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1173 transitions. [2023-08-30 06:45:28,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 146.625) internal successors, (1173), 8 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:28,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:28,750 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:28,751 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 249 flow. Second operand 8 states and 1173 transitions. [2023-08-30 06:45:28,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 630 flow [2023-08-30 06:45:28,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 619 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 06:45:28,757 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 327 flow [2023-08-30 06:45:28,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2023-08-30 06:45:28,758 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2023-08-30 06:45:28,758 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 327 flow [2023-08-30 06:45:28,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.4) internal successors, (1354), 10 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:28,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:28,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:28,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:45:28,968 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 06:45:28,968 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:28,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:28,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1607998129, now seen corresponding path program 1 times [2023-08-30 06:45:28,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:28,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28500828] [2023-08-30 06:45:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:28,969 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 06:45:28,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:28,970 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 06:45:28,971 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 06:45:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:29,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:45:29,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:29,160 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:45:29,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:45:29,336 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 06:45:29,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:29,525 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 06:45:29,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:29,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28500828] [2023-08-30 06:45:29,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28500828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:29,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:29,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:45:29,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810856850] [2023-08-30 06:45:29,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:29,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:45:29,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:29,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:45:29,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:45:29,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:45:29,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 133.75) internal successors, (1070), 8 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:29,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:29,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:45:29,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:31,644 INFO L130 PetriNetUnfolder]: 12187/16357 cut-off events. [2023-08-30 06:45:31,644 INFO L131 PetriNetUnfolder]: For 23291/24703 co-relation queries the response was YES. [2023-08-30 06:45:31,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45980 conditions, 16357 events. 12187/16357 cut-off events. For 23291/24703 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 89248 event pairs, 6328 based on Foata normal form. 1412/11084 useless extension candidates. Maximal degree in co-relation 45948. Up to 14340 conditions per place. [2023-08-30 06:45:31,735 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 73 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-08-30 06:45:31,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 591 flow [2023-08-30 06:45:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:45:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:45:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-08-30 06:45:31,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306306306306306 [2023-08-30 06:45:31,739 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-08-30 06:45:31,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-08-30 06:45:31,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:31,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-08-30 06:45:31,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:31,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:31,744 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:31,744 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 327 flow. Second operand 5 states and 717 transitions. [2023-08-30 06:45:31,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 591 flow [2023-08-30 06:45:31,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 552 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-30 06:45:31,769 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 304 flow [2023-08-30 06:45:31,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2023-08-30 06:45:31,769 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2023-08-30 06:45:31,770 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 304 flow [2023-08-30 06:45:31,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.75) internal successors, (1070), 8 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:31,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:31,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:31,781 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 06:45:31,981 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 06:45:31,981 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:31,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:31,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1607998130, now seen corresponding path program 1 times [2023-08-30 06:45:31,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:31,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486694090] [2023-08-30 06:45:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:31,982 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 06:45:31,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:31,983 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 06:45:31,985 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 06:45:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:45:32,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:32,171 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-08-30 06:45:32,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2023-08-30 06:45:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:45:32,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:45:32,197 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:32,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486694090] [2023-08-30 06:45:32,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486694090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:45:32,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:45:32,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:45:32,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045732] [2023-08-30 06:45:32,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:45:32,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:45:32,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:32,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:45:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:45:32,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 06:45:32,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:32,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:32,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 06:45:32,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:33,712 INFO L130 PetriNetUnfolder]: 11441/15251 cut-off events. [2023-08-30 06:45:33,712 INFO L131 PetriNetUnfolder]: For 20612/21912 co-relation queries the response was YES. [2023-08-30 06:45:33,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40142 conditions, 15251 events. 11441/15251 cut-off events. For 20612/21912 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 81125 event pairs, 5832 based on Foata normal form. 1300/10306 useless extension candidates. Maximal degree in co-relation 40110. Up to 15062 conditions per place. [2023-08-30 06:45:33,776 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 45 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 06:45:33,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 50 transitions, 392 flow [2023-08-30 06:45:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:45:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:45:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-30 06:45:33,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44144144144144143 [2023-08-30 06:45:33,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-30 06:45:33,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-30 06:45:33,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:33,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-30 06:45:33,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:33,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:33,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:33,788 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 304 flow. Second operand 3 states and 441 transitions. [2023-08-30 06:45:33,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 50 transitions, 392 flow [2023-08-30 06:45:33,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 50 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:45:33,802 INFO L231 Difference]: Finished difference. Result has 77 places, 50 transitions, 297 flow [2023-08-30 06:45:33,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=75, 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=297, PETRI_PLACES=77, PETRI_TRANSITIONS=50} [2023-08-30 06:45:33,803 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2023-08-30 06:45:33,803 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 50 transitions, 297 flow [2023-08-30 06:45:33,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:33,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:33,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:33,815 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 06:45:34,012 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 06:45:34,013 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:34,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:34,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1691660640, now seen corresponding path program 1 times [2023-08-30 06:45:34,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:34,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413250814] [2023-08-30 06:45:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:34,014 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 06:45:34,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:34,014 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 06:45:34,015 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 06:45:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:34,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:45:34,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:34,165 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 06:45:34,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:34,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 06:45:34,348 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 06:45:34,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:34,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413250814] [2023-08-30 06:45:34,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413250814] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:34,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:34,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:45:34,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763554961] [2023-08-30 06:45:34,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:34,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:45:34,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:34,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:45:34,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:45:36,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 06:45:36,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 50 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 135.6) internal successors, (1356), 10 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:36,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:36,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 06:45:36,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:38,207 INFO L130 PetriNetUnfolder]: 15405/21123 cut-off events. [2023-08-30 06:45:38,207 INFO L131 PetriNetUnfolder]: For 31851/33943 co-relation queries the response was YES. [2023-08-30 06:45:38,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57061 conditions, 21123 events. 15405/21123 cut-off events. For 31851/33943 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 121446 event pairs, 4989 based on Foata normal form. 2092/16269 useless extension candidates. Maximal degree in co-relation 57029. Up to 12297 conditions per place. [2023-08-30 06:45:38,392 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 108 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2023-08-30 06:45:38,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 825 flow [2023-08-30 06:45:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:45:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:45:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1293 transitions. [2023-08-30 06:45:38,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314314314314314 [2023-08-30 06:45:38,400 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1293 transitions. [2023-08-30 06:45:38,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1293 transitions. [2023-08-30 06:45:38,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:38,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1293 transitions. [2023-08-30 06:45:38,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.66666666666666) internal successors, (1293), 9 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:38,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:38,408 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:38,408 INFO L175 Difference]: Start difference. First operand has 77 places, 50 transitions, 297 flow. Second operand 9 states and 1293 transitions. [2023-08-30 06:45:38,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 825 flow [2023-08-30 06:45:38,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:45:38,438 INFO L231 Difference]: Finished difference. Result has 86 places, 53 transitions, 338 flow [2023-08-30 06:45:38,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=338, PETRI_PLACES=86, PETRI_TRANSITIONS=53} [2023-08-30 06:45:38,439 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2023-08-30 06:45:38,439 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 53 transitions, 338 flow [2023-08-30 06:45:38,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.6) internal successors, (1356), 10 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:38,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:38,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:38,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:45:38,649 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 06:45:38,650 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:38,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:38,650 INFO L85 PathProgramCache]: Analyzing trace with hash 901875931, now seen corresponding path program 1 times [2023-08-30 06:45:38,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:38,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370613960] [2023-08-30 06:45:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:38,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:38,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:38,652 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 06:45:38,653 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 06:45:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:38,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:45:38,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:38,806 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:45:38,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:45:38,981 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 06:45:38,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:39,298 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 06:45:39,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:39,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370613960] [2023-08-30 06:45:39,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370613960] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:39,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:39,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:45:39,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611555157] [2023-08-30 06:45:39,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:39,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:45:39,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:39,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:45:39,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:45:41,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:45:41,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 53 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 133.8) internal successors, (1338), 10 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:41,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:41,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:45:41,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:46,204 INFO L130 PetriNetUnfolder]: 29369/39767 cut-off events. [2023-08-30 06:45:46,205 INFO L131 PetriNetUnfolder]: For 68699/72591 co-relation queries the response was YES. [2023-08-30 06:45:46,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117322 conditions, 39767 events. 29369/39767 cut-off events. For 68699/72591 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 244947 event pairs, 3798 based on Foata normal form. 3892/34435 useless extension candidates. Maximal degree in co-relation 117287. Up to 9937 conditions per place. [2023-08-30 06:45:46,538 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 144 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2023-08-30 06:45:46,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 162 transitions, 1142 flow [2023-08-30 06:45:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:45:46,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:45:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1292 transitions. [2023-08-30 06:45:46,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43109776443109776 [2023-08-30 06:45:46,542 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1292 transitions. [2023-08-30 06:45:46,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1292 transitions. [2023-08-30 06:45:46,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:46,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1292 transitions. [2023-08-30 06:45:46,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.55555555555554) internal successors, (1292), 9 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:46,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:46,549 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:46,549 INFO L175 Difference]: Start difference. First operand has 86 places, 53 transitions, 338 flow. Second operand 9 states and 1292 transitions. [2023-08-30 06:45:46,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 162 transitions, 1142 flow [2023-08-30 06:45:46,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 162 transitions, 1131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:45:46,592 INFO L231 Difference]: Finished difference. Result has 94 places, 58 transitions, 409 flow [2023-08-30 06:45:46,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=94, PETRI_TRANSITIONS=58} [2023-08-30 06:45:46,593 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2023-08-30 06:45:46,593 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 58 transitions, 409 flow [2023-08-30 06:45:46,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 133.8) internal successors, (1338), 10 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:46,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:46,593 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 06:45:46,605 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 06:45:46,803 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 06:45:46,803 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:45:46,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1369090155, now seen corresponding path program 2 times [2023-08-30 06:45:46,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:46,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389940262] [2023-08-30 06:45:46,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:45:46,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:45:46,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:46,805 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 06:45:46,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:45:46,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:45:46,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:45:46,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:45:46,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:47,026 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:45:47,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:45:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:47,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:48,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:48,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389940262] [2023-08-30 06:45:48,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389940262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:48,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:48,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:45:48,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755810834] [2023-08-30 06:45:48,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:48,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:45:48,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:45:48,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:45:56,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 06:45:56,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 58 transitions, 409 flow. Second operand has 18 states, 18 states have (on average 129.11111111111111) internal successors, (2324), 18 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:56,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:56,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 06:45:56,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:46:07,819 INFO L130 PetriNetUnfolder]: 30001/40923 cut-off events. [2023-08-30 06:46:07,819 INFO L131 PetriNetUnfolder]: For 94516/97333 co-relation queries the response was YES. [2023-08-30 06:46:08,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139302 conditions, 40923 events. 30001/40923 cut-off events. For 94516/97333 co-relation queries the response was YES. Maximal size of possible extension queue 1848. Compared 259728 event pairs, 8809 based on Foata normal form. 3123/35365 useless extension candidates. Maximal degree in co-relation 139263. Up to 15994 conditions per place. [2023-08-30 06:46:08,188 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 297 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2023-08-30 06:46:08,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 324 transitions, 2433 flow [2023-08-30 06:46:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:46:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:46:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2658 transitions. [2023-08-30 06:46:08,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42010431484115696 [2023-08-30 06:46:08,195 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2658 transitions. [2023-08-30 06:46:08,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2658 transitions. [2023-08-30 06:46:08,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:46:08,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2658 transitions. [2023-08-30 06:46:08,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 139.89473684210526) internal successors, (2658), 19 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:08,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:08,207 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:08,208 INFO L175 Difference]: Start difference. First operand has 94 places, 58 transitions, 409 flow. Second operand 19 states and 2658 transitions. [2023-08-30 06:46:08,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 324 transitions, 2433 flow [2023-08-30 06:46:08,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 324 transitions, 2214 flow, removed 98 selfloop flow, removed 3 redundant places. [2023-08-30 06:46:08,333 INFO L231 Difference]: Finished difference. Result has 116 places, 70 transitions, 552 flow [2023-08-30 06:46:08,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=552, PETRI_PLACES=116, PETRI_TRANSITIONS=70} [2023-08-30 06:46:08,334 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2023-08-30 06:46:08,334 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 70 transitions, 552 flow [2023-08-30 06:46:08,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 129.11111111111111) internal successors, (2324), 18 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:08,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:46:08,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:46:08,348 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 06:46:08,544 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 06:46:08,544 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:46:08,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:46:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2101571287, now seen corresponding path program 1 times [2023-08-30 06:46:08,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:46:08,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335696416] [2023-08-30 06:46:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:46:08,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:46:08,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:46:08,546 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 06:46:08,548 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 06:46:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:46:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 06:46:08,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:46:08,722 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:46:08,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:46:08,909 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 06:46:08,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:46:09,591 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 06:46:09,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:46:09,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335696416] [2023-08-30 06:46:09,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335696416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:46:09,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:46:09,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:46:09,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397478426] [2023-08-30 06:46:09,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:46:09,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:46:09,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:46:09,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:46:09,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:46:13,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 06:46:13,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 70 transitions, 552 flow. Second operand has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:13,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:46:13,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 06:46:13,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:46:20,278 INFO L130 PetriNetUnfolder]: 27287/38781 cut-off events. [2023-08-30 06:46:20,278 INFO L131 PetriNetUnfolder]: For 154601/161405 co-relation queries the response was YES. [2023-08-30 06:46:20,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143635 conditions, 38781 events. 27287/38781 cut-off events. For 154601/161405 co-relation queries the response was YES. Maximal size of possible extension queue 1433. Compared 248029 event pairs, 17843 based on Foata normal form. 6804/40816 useless extension candidates. Maximal degree in co-relation 143589. Up to 22069 conditions per place. [2023-08-30 06:46:20,717 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 148 selfloop transitions, 15 changer transitions 0/168 dead transitions. [2023-08-30 06:46:20,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1388 flow [2023-08-30 06:46:20,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:46:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:46:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1502 transitions. [2023-08-30 06:46:20,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41004641004641007 [2023-08-30 06:46:20,720 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1502 transitions. [2023-08-30 06:46:20,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1502 transitions. [2023-08-30 06:46:20,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:46:20,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1502 transitions. [2023-08-30 06:46:20,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 136.54545454545453) internal successors, (1502), 11 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:20,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 333.0) internal successors, (3996), 12 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:20,726 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 333.0) internal successors, (3996), 12 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:20,726 INFO L175 Difference]: Start difference. First operand has 116 places, 70 transitions, 552 flow. Second operand 11 states and 1502 transitions. [2023-08-30 06:46:20,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1388 flow [2023-08-30 06:46:20,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 1299 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-08-30 06:46:20,862 INFO L231 Difference]: Finished difference. Result has 119 places, 74 transitions, 545 flow [2023-08-30 06:46:20,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=545, PETRI_PLACES=119, PETRI_TRANSITIONS=74} [2023-08-30 06:46:20,862 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2023-08-30 06:46:20,862 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 74 transitions, 545 flow [2023-08-30 06:46:20,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:20,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:46:20,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:46:20,877 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 06:46:21,073 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 06:46:21,073 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:46:21,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:46:21,074 INFO L85 PathProgramCache]: Analyzing trace with hash -724197799, now seen corresponding path program 1 times [2023-08-30 06:46:21,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:46:21,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22953409] [2023-08-30 06:46:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:46:21,074 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 06:46:21,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:46:21,075 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 06:46:21,077 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 06:46:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:46:21,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:46:21,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:46:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:21,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:46:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:21,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:46:21,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22953409] [2023-08-30 06:46:21,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22953409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:46:21,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:46:21,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:46:21,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192406471] [2023-08-30 06:46:21,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:46:21,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:46:21,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:46:21,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:46:21,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:46:22,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-08-30 06:46:22,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 74 transitions, 545 flow. Second operand has 12 states, 12 states have (on average 135.83333333333334) internal successors, (1630), 12 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:22,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:46:22,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-08-30 06:46:22,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:46:26,674 INFO L130 PetriNetUnfolder]: 21755/30859 cut-off events. [2023-08-30 06:46:26,674 INFO L131 PetriNetUnfolder]: For 124036/129593 co-relation queries the response was YES. [2023-08-30 06:46:26,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123942 conditions, 30859 events. 21755/30859 cut-off events. For 124036/129593 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 191740 event pairs, 11742 based on Foata normal form. 5645/34864 useless extension candidates. Maximal degree in co-relation 123896. Up to 22588 conditions per place. [2023-08-30 06:46:27,004 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 143 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2023-08-30 06:46:27,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 160 transitions, 1341 flow [2023-08-30 06:46:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:46:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:46:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1422 transitions. [2023-08-30 06:46:27,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42702702702702705 [2023-08-30 06:46:27,007 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1422 transitions. [2023-08-30 06:46:27,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1422 transitions. [2023-08-30 06:46:27,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:46:27,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1422 transitions. [2023-08-30 06:46:27,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 142.2) internal successors, (1422), 10 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:27,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:27,012 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:27,012 INFO L175 Difference]: Start difference. First operand has 119 places, 74 transitions, 545 flow. Second operand 10 states and 1422 transitions. [2023-08-30 06:46:27,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 160 transitions, 1341 flow [2023-08-30 06:46:27,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 160 transitions, 1320 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 06:46:27,499 INFO L231 Difference]: Finished difference. Result has 125 places, 75 transitions, 564 flow [2023-08-30 06:46:27,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=564, PETRI_PLACES=125, PETRI_TRANSITIONS=75} [2023-08-30 06:46:27,500 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2023-08-30 06:46:27,500 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 75 transitions, 564 flow [2023-08-30 06:46:27,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 135.83333333333334) internal successors, (1630), 12 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:27,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:46:27,501 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:46:27,517 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 06:46:27,715 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 06:46:27,715 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:46:27,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:46:27,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1525925856, now seen corresponding path program 2 times [2023-08-30 06:46:27,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:46:27,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219645924] [2023-08-30 06:46:27,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:46:27,716 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 06:46:27,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:46:27,717 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 06:46:27,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 06:46:27,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:46:27,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:46:27,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 06:46:27,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:46:27,913 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:46:27,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:46:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:28,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:46:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:29,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:46:29,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219645924] [2023-08-30 06:46:29,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219645924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:46:29,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:46:29,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:46:29,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710883897] [2023-08-30 06:46:29,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:46:29,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:46:29,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:46:29,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:46:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:46:37,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 333 [2023-08-30 06:46:37,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 75 transitions, 564 flow. Second operand has 18 states, 18 states have (on average 127.33333333333333) internal successors, (2292), 18 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:37,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:46:37,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 333 [2023-08-30 06:46:37,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:46:52,390 INFO L130 PetriNetUnfolder]: 25273/34870 cut-off events. [2023-08-30 06:46:52,390 INFO L131 PetriNetUnfolder]: For 151489/155189 co-relation queries the response was YES. [2023-08-30 06:46:52,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154012 conditions, 34870 events. 25273/34870 cut-off events. For 151489/155189 co-relation queries the response was YES. Maximal size of possible extension queue 1584. Compared 220563 event pairs, 8306 based on Foata normal form. 3902/35259 useless extension candidates. Maximal degree in co-relation 153964. Up to 15532 conditions per place. [2023-08-30 06:46:52,777 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 319 selfloop transitions, 24 changer transitions 0/349 dead transitions. [2023-08-30 06:46:52,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 349 transitions, 2927 flow [2023-08-30 06:46:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:46:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:46:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2614 transitions. [2023-08-30 06:46:52,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41314999209736053 [2023-08-30 06:46:52,781 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2614 transitions. [2023-08-30 06:46:52,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2614 transitions. [2023-08-30 06:46:52,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:46:52,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2614 transitions. [2023-08-30 06:46:52,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:52,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:52,792 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:52,792 INFO L175 Difference]: Start difference. First operand has 125 places, 75 transitions, 564 flow. Second operand 19 states and 2614 transitions. [2023-08-30 06:46:52,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 349 transitions, 2927 flow [2023-08-30 06:46:53,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 349 transitions, 2908 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 06:46:53,209 INFO L231 Difference]: Finished difference. Result has 144 places, 87 transitions, 704 flow [2023-08-30 06:46:53,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=704, PETRI_PLACES=144, PETRI_TRANSITIONS=87} [2023-08-30 06:46:53,210 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 87 predicate places. [2023-08-30 06:46:53,210 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 87 transitions, 704 flow [2023-08-30 06:46:53,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 127.33333333333333) internal successors, (2292), 18 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:53,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:46:53,211 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-30 06:46:53,218 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 06:46:53,411 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 06:46:53,411 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:46:53,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:46:53,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1637399693, now seen corresponding path program 3 times [2023-08-30 06:46:53,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:46:53,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485304572] [2023-08-30 06:46:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:46:53,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:46:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:46:53,413 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 06:46:53,415 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 06:46:53,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 06:46:53,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:46:53,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:46:53,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:46:53,688 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:46:53,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:46:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:54,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:46:54,309 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 8 treesize of output 6 [2023-08-30 06:46:54,329 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 06:46:54,331 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 06:46:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:55,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:46:55,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485304572] [2023-08-30 06:46:55,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485304572] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:46:55,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:46:55,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 06:46:55,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497513435] [2023-08-30 06:46:55,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:46:55,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 06:46:55,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:46:55,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 06:46:55,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-08-30 06:47:07,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:47:07,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 87 transitions, 704 flow. Second operand has 21 states, 21 states have (on average 133.14285714285714) internal successors, (2796), 21 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:07,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:07,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:47:07,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:22,545 INFO L130 PetriNetUnfolder]: 32291/45201 cut-off events. [2023-08-30 06:47:22,545 INFO L131 PetriNetUnfolder]: For 198170/202412 co-relation queries the response was YES. [2023-08-30 06:47:22,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213190 conditions, 45201 events. 32291/45201 cut-off events. For 198170/202412 co-relation queries the response was YES. Maximal size of possible extension queue 2003. Compared 304902 event pairs, 10467 based on Foata normal form. 4636/45856 useless extension candidates. Maximal degree in co-relation 213136. Up to 19699 conditions per place. [2023-08-30 06:47:23,142 INFO L137 encePairwiseOnDemand]: 324/333 looper letters, 461 selfloop transitions, 42 changer transitions 0/509 dead transitions. [2023-08-30 06:47:23,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 509 transitions, 4560 flow [2023-08-30 06:47:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:47:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:47:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3456 transitions. [2023-08-30 06:47:23,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2023-08-30 06:47:23,147 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3456 transitions. [2023-08-30 06:47:23,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3456 transitions. [2023-08-30 06:47:23,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:23,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3456 transitions. [2023-08-30 06:47:23,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:23,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:23,158 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:23,158 INFO L175 Difference]: Start difference. First operand has 144 places, 87 transitions, 704 flow. Second operand 24 states and 3456 transitions. [2023-08-30 06:47:23,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 509 transitions, 4560 flow [2023-08-30 06:47:24,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 509 transitions, 4266 flow, removed 140 selfloop flow, removed 5 redundant places. [2023-08-30 06:47:24,303 INFO L231 Difference]: Finished difference. Result has 172 places, 111 transitions, 1053 flow [2023-08-30 06:47:24,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1053, PETRI_PLACES=172, PETRI_TRANSITIONS=111} [2023-08-30 06:47:24,304 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 115 predicate places. [2023-08-30 06:47:24,304 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 111 transitions, 1053 flow [2023-08-30 06:47:24,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 133.14285714285714) internal successors, (2796), 21 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:24,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:24,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:47:24,320 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 06:47:24,516 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 06:47:24,517 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:47:24,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1421077346, now seen corresponding path program 2 times [2023-08-30 06:47:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:24,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948638188] [2023-08-30 06:47:24,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:47:24,518 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 06:47:24,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:24,519 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 06:47:24,522 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 06:47:24,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:47:24,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:47:24,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 06:47:24,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:24,752 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:47:24,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:47:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:25,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:26,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:26,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948638188] [2023-08-30 06:47:26,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948638188] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:26,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:26,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 06:47:26,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729799622] [2023-08-30 06:47:26,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:26,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:47:26,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:26,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:47:26,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:47:37,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 333 [2023-08-30 06:47:37,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 111 transitions, 1053 flow. Second operand has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:37,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:37,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 333 [2023-08-30 06:47:37,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:51,227 INFO L130 PetriNetUnfolder]: 37249/52863 cut-off events. [2023-08-30 06:47:51,228 INFO L131 PetriNetUnfolder]: For 345139/353851 co-relation queries the response was YES. [2023-08-30 06:47:51,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259242 conditions, 52863 events. 37249/52863 cut-off events. For 345139/353851 co-relation queries the response was YES. Maximal size of possible extension queue 1943. Compared 357398 event pairs, 14073 based on Foata normal form. 10336/63184 useless extension candidates. Maximal degree in co-relation 259177. Up to 14724 conditions per place. [2023-08-30 06:47:52,092 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 414 selfloop transitions, 27 changer transitions 0/449 dead transitions. [2023-08-30 06:47:52,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 449 transitions, 4650 flow [2023-08-30 06:47:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:47:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:47:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2582 transitions. [2023-08-30 06:47:52,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40809230282914494 [2023-08-30 06:47:52,097 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2582 transitions. [2023-08-30 06:47:52,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2582 transitions. [2023-08-30 06:47:52,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:52,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2582 transitions. [2023-08-30 06:47:52,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 135.89473684210526) internal successors, (2582), 19 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:52,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:52,103 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:52,103 INFO L175 Difference]: Start difference. First operand has 172 places, 111 transitions, 1053 flow. Second operand 19 states and 2582 transitions. [2023-08-30 06:47:52,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 449 transitions, 4650 flow [2023-08-30 06:47:53,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 449 transitions, 4524 flow, removed 53 selfloop flow, removed 7 redundant places. [2023-08-30 06:47:53,317 INFO L231 Difference]: Finished difference. Result has 188 places, 121 transitions, 1180 flow [2023-08-30 06:47:53,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1180, PETRI_PLACES=188, PETRI_TRANSITIONS=121} [2023-08-30 06:47:53,318 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 131 predicate places. [2023-08-30 06:47:53,318 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 121 transitions, 1180 flow [2023-08-30 06:47:53,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:53,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:53,319 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:47:53,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:53,520 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 06:47:53,520 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:47:53,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1076024012, now seen corresponding path program 3 times [2023-08-30 06:47:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:53,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36435200] [2023-08-30 06:47:53,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:47:53,521 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 06:47:53,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:53,522 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 06:47:53,523 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 06:47:53,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:47:53,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:47:53,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:47:53,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:53,812 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:47:53,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:47:54,081 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 06:47:54,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:56,032 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 06:47:56,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:56,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36435200] [2023-08-30 06:47:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36435200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:56,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:56,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:47:56,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331230486] [2023-08-30 06:47:56,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:56,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:47:56,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:56,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:47:56,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:48:07,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 06:48:07,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 121 transitions, 1180 flow. Second operand has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:07,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:07,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 06:48:07,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:39,109 INFO L130 PetriNetUnfolder]: 70299/97281 cut-off events. [2023-08-30 06:48:39,109 INFO L131 PetriNetUnfolder]: For 845890/865098 co-relation queries the response was YES. [2023-08-30 06:48:40,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535547 conditions, 97281 events. 70299/97281 cut-off events. For 845890/865098 co-relation queries the response was YES. Maximal size of possible extension queue 2724. Compared 653391 event pairs, 47425 based on Foata normal form. 19169/116142 useless extension candidates. Maximal degree in co-relation 535477. Up to 28629 conditions per place. [2023-08-30 06:48:40,794 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 733 selfloop transitions, 24 changer transitions 0/770 dead transitions. [2023-08-30 06:48:40,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 770 transitions, 7471 flow [2023-08-30 06:48:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:48:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:48:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3782 transitions. [2023-08-30 06:48:40,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47322322322322324 [2023-08-30 06:48:40,798 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3782 transitions. [2023-08-30 06:48:40,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3782 transitions. [2023-08-30 06:48:40,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:40,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3782 transitions. [2023-08-30 06:48:40,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 157.58333333333334) internal successors, (3782), 24 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:40,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:40,806 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:40,806 INFO L175 Difference]: Start difference. First operand has 188 places, 121 transitions, 1180 flow. Second operand 24 states and 3782 transitions. [2023-08-30 06:48:40,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 770 transitions, 7471 flow [2023-08-30 06:48:49,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 770 transitions, 7411 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-08-30 06:48:49,761 INFO L231 Difference]: Finished difference. Result has 215 places, 134 transitions, 1331 flow [2023-08-30 06:48:49,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1331, PETRI_PLACES=215, PETRI_TRANSITIONS=134} [2023-08-30 06:48:49,761 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 158 predicate places. [2023-08-30 06:48:49,762 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 134 transitions, 1331 flow [2023-08-30 06:48:49,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:49,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:49,762 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:48:49,771 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 06:48:49,963 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 06:48:49,963 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:48:49,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:49,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1083547680, now seen corresponding path program 2 times [2023-08-30 06:48:49,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:49,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485136905] [2023-08-30 06:48:49,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:48:49,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:48:49,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:49,965 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 06:48:49,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 06:48:50,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:48:50,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:48:50,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:48:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:50,148 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:48:50,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:48:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:48:50,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:48:50,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:50,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485136905] [2023-08-30 06:48:50,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485136905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:48:50,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:48:50,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:48:50,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104366382] [2023-08-30 06:48:50,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:48:50,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:48:50,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:48:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:48:50,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 06:48:50,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 134 transitions, 1331 flow. Second operand has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:50,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:50,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 06:48:50,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:49:07,562 INFO L130 PetriNetUnfolder]: 73161/102966 cut-off events. [2023-08-30 06:49:07,562 INFO L131 PetriNetUnfolder]: For 843745/861767 co-relation queries the response was YES. [2023-08-30 06:49:09,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543555 conditions, 102966 events. 73161/102966 cut-off events. For 843745/861767 co-relation queries the response was YES. Maximal size of possible extension queue 2214. Compared 690196 event pairs, 44685 based on Foata normal form. 26802/129666 useless extension candidates. Maximal degree in co-relation 543472. Up to 85727 conditions per place. [2023-08-30 06:49:09,719 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 169 selfloop transitions, 21 changer transitions 0/198 dead transitions. [2023-08-30 06:49:09,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 198 transitions, 2300 flow [2023-08-30 06:49:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:49:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:49:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 700 transitions. [2023-08-30 06:49:09,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42042042042042044 [2023-08-30 06:49:09,721 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 700 transitions. [2023-08-30 06:49:09,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 700 transitions. [2023-08-30 06:49:09,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:49:09,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 700 transitions. [2023-08-30 06:49:09,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:09,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:09,724 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:09,724 INFO L175 Difference]: Start difference. First operand has 215 places, 134 transitions, 1331 flow. Second operand 5 states and 700 transitions. [2023-08-30 06:49:09,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 198 transitions, 2300 flow [2023-08-30 06:49:18,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 198 transitions, 2244 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-08-30 06:49:18,535 INFO L231 Difference]: Finished difference. Result has 209 places, 134 transitions, 1339 flow [2023-08-30 06:49:18,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1339, PETRI_PLACES=209, PETRI_TRANSITIONS=134} [2023-08-30 06:49:18,535 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 152 predicate places. [2023-08-30 06:49:18,535 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 134 transitions, 1339 flow [2023-08-30 06:49:18,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:18,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:49:18,535 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-08-30 06:49:18,542 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 06:49:18,736 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 06:49:18,736 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:49:18,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:49:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash 259241826, now seen corresponding path program 4 times [2023-08-30 06:49:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:49:18,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503732555] [2023-08-30 06:49:18,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:49:18,738 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 06:49:18,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:49:18,739 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 06:49:18,742 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 06:49:18,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:49:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:49:18,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 06:49:18,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:49:18,946 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:49:18,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:49:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:49:19,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:49:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:49:20,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:49:20,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503732555] [2023-08-30 06:49:20,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503732555] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:49:20,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:49:20,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:49:20,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38749386] [2023-08-30 06:49:20,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:49:20,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:49:20,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:49:20,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:49:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:49:31,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-08-30 06:49:31,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 134 transitions, 1339 flow. Second operand has 24 states, 24 states have (on average 131.08333333333334) internal successors, (3146), 24 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 06:49:31,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:49:31,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-08-30 06:49:31,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:50:14,889 INFO L130 PetriNetUnfolder]: 97421/134773 cut-off events. [2023-08-30 06:50:14,889 INFO L131 PetriNetUnfolder]: For 1529908/1562653 co-relation queries the response was YES. [2023-08-30 06:50:17,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 778132 conditions, 134773 events. 97421/134773 cut-off events. For 1529908/1562653 co-relation queries the response was YES. Maximal size of possible extension queue 2569. Compared 919608 event pairs, 10919 based on Foata normal form. 49489/184071 useless extension candidates. Maximal degree in co-relation 778047. Up to 29214 conditions per place. [2023-08-30 06:50:18,029 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 711 selfloop transitions, 56 changer transitions 0/775 dead transitions. [2023-08-30 06:50:18,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 775 transitions, 7764 flow [2023-08-30 06:50:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 06:50:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 06:50:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5241 transitions. [2023-08-30 06:50:18,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42537131726320915 [2023-08-30 06:50:18,038 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5241 transitions. [2023-08-30 06:50:18,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5241 transitions. [2023-08-30 06:50:18,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:50:18,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5241 transitions. [2023-08-30 06:50:18,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 141.64864864864865) internal successors, (5241), 37 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:18,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 333.0) internal successors, (12654), 38 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:18,056 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 333.0) internal successors, (12654), 38 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:18,056 INFO L175 Difference]: Start difference. First operand has 209 places, 134 transitions, 1339 flow. Second operand 37 states and 5241 transitions. [2023-08-30 06:50:18,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 775 transitions, 7764 flow [2023-08-30 06:50:26,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 775 transitions, 7544 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-08-30 06:50:26,513 INFO L231 Difference]: Finished difference. Result has 246 places, 147 transitions, 1572 flow [2023-08-30 06:50:26,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1572, PETRI_PLACES=246, PETRI_TRANSITIONS=147} [2023-08-30 06:50:26,514 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 189 predicate places. [2023-08-30 06:50:26,514 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 147 transitions, 1572 flow [2023-08-30 06:50:26,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 131.08333333333334) internal successors, (3146), 24 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 06:50:26,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:50:26,515 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1] [2023-08-30 06:50:26,529 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 06:50:26,729 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 06:50:26,729 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:50:26,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:50:26,730 INFO L85 PathProgramCache]: Analyzing trace with hash -755102101, now seen corresponding path program 5 times [2023-08-30 06:50:26,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:50:26,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523936286] [2023-08-30 06:50:26,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:50:26,730 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 06:50:26,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:50:26,731 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 06:50:26,735 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 06:50:26,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 06:50:26,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:50:26,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 06:50:26,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:50:26,963 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:50:26,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:50:27,237 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 7 treesize of output 5 [2023-08-30 06:50:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:50:27,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:50:27,510 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 8 treesize of output 6 [2023-08-30 06:50:27,525 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 06:50:27,527 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 06:50:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:50:29,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:50:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523936286] [2023-08-30 06:50:29,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523936286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:50:29,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:50:29,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2023-08-30 06:50:29,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438015504] [2023-08-30 06:50:29,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:50:29,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 06:50:29,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:50:29,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 06:50:29,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-08-30 06:50:46,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 06:50:46,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 147 transitions, 1572 flow. Second operand has 23 states, 23 states have (on average 132.17391304347825) internal successors, (3040), 23 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:46,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:50:46,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 06:50:46,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:51:18,037 INFO L130 PetriNetUnfolder]: 93937/130008 cut-off events. [2023-08-30 06:51:18,037 INFO L131 PetriNetUnfolder]: For 1370752/1400784 co-relation queries the response was YES. [2023-08-30 06:51:20,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770431 conditions, 130008 events. 93937/130008 cut-off events. For 1370752/1400784 co-relation queries the response was YES. Maximal size of possible extension queue 2521. Compared 855425 event pairs, 59453 based on Foata normal form. 30163/159686 useless extension candidates. Maximal degree in co-relation 770342. Up to 113916 conditions per place. [2023-08-30 06:51:21,726 INFO L137 encePairwiseOnDemand]: 324/333 looper letters, 400 selfloop transitions, 41 changer transitions 0/449 dead transitions. [2023-08-30 06:51:21,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 449 transitions, 4505 flow [2023-08-30 06:51:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 06:51:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 06:51:21,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3254 transitions. [2023-08-30 06:51:21,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4248596422509466 [2023-08-30 06:51:21,733 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3254 transitions. [2023-08-30 06:51:21,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3254 transitions. [2023-08-30 06:51:21,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:51:21,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3254 transitions. [2023-08-30 06:51:21,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 141.47826086956522) internal successors, (3254), 23 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:51:21,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 333.0) internal successors, (7992), 24 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:51:21,743 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 333.0) internal successors, (7992), 24 states have internal predecessors, (7992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:51:21,743 INFO L175 Difference]: Start difference. First operand has 246 places, 147 transitions, 1572 flow. Second operand 23 states and 3254 transitions. [2023-08-30 06:51:21,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 449 transitions, 4505 flow [2023-08-30 06:52:34,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 449 transitions, 4242 flow, removed 58 selfloop flow, removed 29 redundant places. [2023-08-30 06:52:34,588 INFO L231 Difference]: Finished difference. Result has 238 places, 151 transitions, 1458 flow [2023-08-30 06:52:34,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1458, PETRI_PLACES=238, PETRI_TRANSITIONS=151} [2023-08-30 06:52:34,589 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 181 predicate places. [2023-08-30 06:52:34,589 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 151 transitions, 1458 flow [2023-08-30 06:52:34,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 132.17391304347825) internal successors, (3040), 23 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:34,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:52:34,590 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:52:34,597 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 06:52:34,790 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 06:52:34,790 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:52:34,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:52:34,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1128839689, now seen corresponding path program 3 times [2023-08-30 06:52:34,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:52:34,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193169464] [2023-08-30 06:52:34,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:52:34,791 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 06:52:34,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:52:34,792 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 06:52:34,794 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 06:52:34,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:52:34,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:52:34,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:52:34,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:52:35,027 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:52:35,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:52:35,230 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 7 treesize of output 5 [2023-08-30 06:52:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:52:35,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:52:35,599 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 8 treesize of output 6 [2023-08-30 06:52:35,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-30 06:52:35,643 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 06:52:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:52:37,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:52:37,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193169464] [2023-08-30 06:52:37,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193169464] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:52:37,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:52:37,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:52:37,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398274500] [2023-08-30 06:52:37,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:52:37,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:52:37,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:52:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:52:37,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:52:43,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-08-30 06:52:43,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 151 transitions, 1458 flow. Second operand has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:43,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:52:43,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-08-30 06:52:43,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:53:13,385 INFO L130 PetriNetUnfolder]: 121605/168153 cut-off events. [2023-08-30 06:53:13,385 INFO L131 PetriNetUnfolder]: For 1342317/1362805 co-relation queries the response was YES. [2023-08-30 06:53:16,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862066 conditions, 168153 events. 121605/168153 cut-off events. For 1342317/1362805 co-relation queries the response was YES. Maximal size of possible extension queue 2913. Compared 1150519 event pairs, 18217 based on Foata normal form. 32254/200302 useless extension candidates. Maximal degree in co-relation 861983. Up to 56108 conditions per place. [2023-08-30 06:53:17,056 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 353 selfloop transitions, 26 changer transitions 0/387 dead transitions. [2023-08-30 06:53:17,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 387 transitions, 4347 flow [2023-08-30 06:53:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:53:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:53:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 982 transitions. [2023-08-30 06:53:17,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212784212784213 [2023-08-30 06:53:17,059 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 982 transitions. [2023-08-30 06:53:17,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 982 transitions. [2023-08-30 06:53:17,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:53:17,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 982 transitions. [2023-08-30 06:53:17,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:17,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:17,063 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:53:17,063 INFO L175 Difference]: Start difference. First operand has 238 places, 151 transitions, 1458 flow. Second operand 7 states and 982 transitions. [2023-08-30 06:53:17,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 387 transitions, 4347 flow [2023-08-30 06:54:04,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 387 transitions, 4161 flow, removed 28 selfloop flow, removed 16 redundant places. [2023-08-30 06:54:04,400 INFO L231 Difference]: Finished difference. Result has 228 places, 152 transitions, 1463 flow [2023-08-30 06:54:04,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1463, PETRI_PLACES=228, PETRI_TRANSITIONS=152} [2023-08-30 06:54:04,401 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 171 predicate places. [2023-08-30 06:54:04,401 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 152 transitions, 1463 flow [2023-08-30 06:54:04,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:04,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:54:04,401 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:54:04,412 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 (28)] Ended with exit code 0 [2023-08-30 06:54:04,611 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 06:54:04,611 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:54:04,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:54:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash -33945372, now seen corresponding path program 3 times [2023-08-30 06:54:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:54:04,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265993950] [2023-08-30 06:54:04,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:54:04,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:54:04,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:54:04,613 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 06:54:04,613 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 06:54:04,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 06:54:04,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:54:04,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:54:04,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:54:04,918 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:54:04,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:54:04,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 06:54:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:54:05,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:54:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 06:54:05,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:54:05,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265993950] [2023-08-30 06:54:05,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265993950] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:54:05,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:54:05,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 06:54:05,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527296498] [2023-08-30 06:54:05,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:54:05,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:54:05,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:54:05,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:54:05,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:54:08,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 06:54:08,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 152 transitions, 1463 flow. Second operand has 14 states, 14 states have (on average 129.57142857142858) internal successors, (1814), 14 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:08,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:54:08,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 06:54:08,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:54:38,014 INFO L130 PetriNetUnfolder]: 111383/154139 cut-off events. [2023-08-30 06:54:38,014 INFO L131 PetriNetUnfolder]: For 1890015/1912122 co-relation queries the response was YES. [2023-08-30 06:54:40,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826428 conditions, 154139 events. 111383/154139 cut-off events. For 1890015/1912122 co-relation queries the response was YES. Maximal size of possible extension queue 2677. Compared 1039964 event pairs, 50024 based on Foata normal form. 22160/176090 useless extension candidates. Maximal degree in co-relation 826344. Up to 92476 conditions per place. [2023-08-30 06:54:41,848 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 272 selfloop transitions, 22 changer transitions 0/304 dead transitions. [2023-08-30 06:54:41,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 304 transitions, 3114 flow [2023-08-30 06:54:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 06:54:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 06:54:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1920 transitions. [2023-08-30 06:54:41,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118404118404118 [2023-08-30 06:54:41,872 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1920 transitions. [2023-08-30 06:54:41,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1920 transitions. [2023-08-30 06:54:41,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:54:41,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1920 transitions. [2023-08-30 06:54:41,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 137.14285714285714) internal successors, (1920), 14 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:41,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:41,888 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:54:41,888 INFO L175 Difference]: Start difference. First operand has 228 places, 152 transitions, 1463 flow. Second operand 14 states and 1920 transitions. [2023-08-30 06:54:41,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 304 transitions, 3114 flow [2023-08-30 06:55:47,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 304 transitions, 3032 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-30 06:55:47,357 INFO L231 Difference]: Finished difference. Result has 241 places, 151 transitions, 1470 flow [2023-08-30 06:55:47,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1470, PETRI_PLACES=241, PETRI_TRANSITIONS=151} [2023-08-30 06:55:47,357 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 184 predicate places. [2023-08-30 06:55:47,358 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 151 transitions, 1470 flow [2023-08-30 06:55:47,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 129.57142857142858) internal successors, (1814), 14 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:55:47,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:55:47,358 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:55:47,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-30 06:55:47,564 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 06:55:47,565 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 06:55:47,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:55:47,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1356686679, now seen corresponding path program 4 times [2023-08-30 06:55:47,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:55:47,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381163841] [2023-08-30 06:55:47,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:55:47,566 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 06:55:47,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:55:47,566 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 06:55:47,568 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 (30)] Waiting until timeout for monitored process [2023-08-30 06:55:47,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:55:47,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:55:47,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 06:55:47,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:55:47,789 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:55:47,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:55:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:55:48,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:55:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:55:49,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:55:49,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381163841] [2023-08-30 06:55:49,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381163841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:55:49,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:55:49,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:55:49,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656045493] [2023-08-30 06:55:49,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:55:49,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:55:49,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:55:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:55:49,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:56:06,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 333 [2023-08-30 06:56:06,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 151 transitions, 1470 flow. Second operand has 24 states, 24 states have (on average 130.25) internal successors, (3126), 24 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:06,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:06,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 333 [2023-08-30 06:56:06,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15