./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.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-three-array-sum.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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --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 07:31:26,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:31:26,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:31:26,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:31:26,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:31:26,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:31:26,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:31:26,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:31:26,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:31:26,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:31:26,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:31:26,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:31:26,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:31:26,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:31:26,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:31:26,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:31:26,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:31:26,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:31:26,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:31:26,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:31:26,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:31:26,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:31:26,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:31:26,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:31:26,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:31:26,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:31:26,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:31:26,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:31:26,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:31:26,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:31:26,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:31:26,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:31:26,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:31:26,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:31:26,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:31:26,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:31:26,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:31:26,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:31:26,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:31:26,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:31:26,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:31:26,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:31:26,983 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:31:26,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:31:26,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:31:26,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:31:26,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:31:26,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:31:26,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:31:26,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:31:26,985 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:31:26,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:31:26,985 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:31:26,985 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:31:26,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:31:26,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:31:26,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:31:26,986 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:31:26,986 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:31:26,986 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:31:26,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:31:26,987 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:31:26,987 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:31:26,987 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:31:26,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:31:26,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:31:26,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:31:26,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:31:26,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:31:26,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:31:26,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:31:26,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:31:26,988 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:31:26,988 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:31:26,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:31:26,989 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:31:26,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:31:27,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:31:27,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:31:27,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:31:27,251 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:31:27,251 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:31:27,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-08-30 07:31:28,170 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:31:28,360 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:31:28,360 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-08-30 07:31:28,364 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae7427002/f25f017655e345079881f55054a4b87d/FLAGd2e59c2d5 [2023-08-30 07:31:28,375 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae7427002/f25f017655e345079881f55054a4b87d [2023-08-30 07:31:28,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:31:28,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:31:28,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:31:28,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:31:28,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:31:28,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:31:28" (1/1) ... [2023-08-30 07:31:28,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eea12a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:28, skipping insertion in model container [2023-08-30 07:31:28,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:31:28" (1/1) ... [2023-08-30 07:31:28,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:31:28,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:31:28,541 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-three-array-sum.wvr.c[2691,2704] [2023-08-30 07:31:28,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:31:28,561 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 07:31:28,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@37656323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:28, skipping insertion in model container [2023-08-30 07:31:28,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:31:28,563 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:31:28,564 INFO L158 Benchmark]: Toolchain (without parser) took 186.09ms. Allocated memory is still 102.8MB. Free memory was 80.3MB in the beginning and 70.7MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 07:31:28,565 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 69.2MB. Free memory is still 47.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:31:28,565 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.57ms. Allocated memory is still 102.8MB. Free memory was 80.3MB in the beginning and 70.7MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 07:31:28,566 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 69.2MB. Free memory is still 47.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.57ms. Allocated memory is still 102.8MB. Free memory was 80.3MB in the beginning and 70.7MB 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: 111]: 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-three-array-sum.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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --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 07:31:29,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:31:29,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:31:29,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:31:29,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:31:29,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:31:29,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:31:29,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:31:29,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:31:29,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:31:29,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:31:29,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:31:29,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:31:29,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:31:29,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:31:29,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:31:29,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:31:29,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:31:29,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:31:29,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:31:29,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:31:29,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:31:29,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:31:29,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:31:29,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:31:29,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:31:29,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:31:29,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:31:29,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:31:29,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:31:29,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:31:29,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:31:29,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:31:29,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:31:29,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:31:29,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:31:29,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:31:29,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:31:29,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:31:29,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:31:29,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:31:29,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:31:30,017 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:31:30,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:31:30,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:31:30,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:31:30,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:31:30,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:31:30,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:31:30,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:31:30,019 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:31:30,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:31:30,020 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:31:30,020 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:31:30,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:31:30,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:31:30,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:31:30,021 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:31:30,021 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:31:30,021 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:31:30,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:31:30,021 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:31:30,022 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:31:30,022 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:31:30,022 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:31:30,022 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:31:30,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:31:30,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:31:30,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:31:30,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:31:30,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:31:30,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:31:30,023 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:31:30,023 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:31:30,024 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:31:30,024 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:31:30,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:31:30,024 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:31:30,024 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:31:30,024 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:31:30,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:31:30,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:31:30,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:31:30,298 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:31:30,298 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:31:30,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-08-30 07:31:31,353 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:31:31,507 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:31:31,508 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-08-30 07:31:31,512 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1900c6e20/dac4db7d779b423494b52f8f76097422/FLAGc3be1d3ac [2023-08-30 07:31:31,521 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1900c6e20/dac4db7d779b423494b52f8f76097422 [2023-08-30 07:31:31,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:31:31,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:31:31,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:31:31,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:31:31,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:31:31,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eb7c02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31, skipping insertion in model container [2023-08-30 07:31:31,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:31:31,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:31:31,671 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-three-array-sum.wvr.c[2691,2704] [2023-08-30 07:31:31,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:31:31,696 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:31:31,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:31:31,727 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-three-array-sum.wvr.c[2691,2704] [2023-08-30 07:31:31,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:31:31,741 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:31:31,772 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-three-array-sum.wvr.c[2691,2704] [2023-08-30 07:31:31,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:31:31,789 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:31:31,790 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:31:31,795 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:31:31,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31 WrapperNode [2023-08-30 07:31:31,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:31:31,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:31:31,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:31:31,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:31:31,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,845 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 153 [2023-08-30 07:31:31,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:31:31,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:31:31,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:31:31,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:31:31,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,895 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:31:31,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:31:31,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:31:31,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:31:31,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (1/1) ... [2023-08-30 07:31:31,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:31:31,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:31:31,932 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 07:31:31,952 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 07:31:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:31:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:31:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:31:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:31:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:31:31,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:31:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:31:31,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:31:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 07:31:31,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 07:31:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:31:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:31:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:31:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:31:31,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:31:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:31:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:31:31,969 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 07:31:32,062 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:31:32,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:31:32,562 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:31:32,659 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:31:32,660 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 07:31:32,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:31:32 BoogieIcfgContainer [2023-08-30 07:31:32,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:31:32,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:31:32,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:31:32,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:31:32,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:31:31" (1/3) ... [2023-08-30 07:31:32,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bc4cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:31:32, skipping insertion in model container [2023-08-30 07:31:32,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:31:31" (2/3) ... [2023-08-30 07:31:32,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bc4cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:31:32, skipping insertion in model container [2023-08-30 07:31:32,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:31:32" (3/3) ... [2023-08-30 07:31:32,671 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2023-08-30 07:31:32,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:31:32,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-30 07:31:32,686 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:31:32,787 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 07:31:32,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 245 transitions, 514 flow [2023-08-30 07:31:32,902 INFO L130 PetriNetUnfolder]: 20/242 cut-off events. [2023-08-30 07:31:32,902 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:31:32,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 242 events. 20/242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 301 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 192. Up to 3 conditions per place. [2023-08-30 07:31:32,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 245 transitions, 514 flow [2023-08-30 07:31:32,913 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 238 transitions, 494 flow [2023-08-30 07:31:32,917 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:31:32,933 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 238 transitions, 494 flow [2023-08-30 07:31:32,936 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 238 transitions, 494 flow [2023-08-30 07:31:32,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 238 transitions, 494 flow [2023-08-30 07:31:32,983 INFO L130 PetriNetUnfolder]: 20/238 cut-off events. [2023-08-30 07:31:32,984 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:31:32,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 238 events. 20/238 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 301 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 192. Up to 3 conditions per place. [2023-08-30 07:31:32,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 3482 [2023-08-30 07:31:58,075 INFO L134 LiptonReduction]: Checked pairs total: 5374 [2023-08-30 07:31:58,075 INFO L136 LiptonReduction]: Total number of compositions: 250 [2023-08-30 07:31:58,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:31:58,091 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;@49bc2ab2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:31:58,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-30 07:31:58,094 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:31:58,094 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:31:58,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:31:58,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:31:58,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:31:58,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:31:58,099 INFO L85 PathProgramCache]: Analyzing trace with hash 29773, now seen corresponding path program 1 times [2023-08-30 07:31:58,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:31:58,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732483440] [2023-08-30 07:31:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:31:58,109 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 07:31:58,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:31:58,127 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 07:31:58,130 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 07:31:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:31:58,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:31:58,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:31:58,370 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:31:58,371 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 15 treesize of output 50 [2023-08-30 07:31:58,400 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 07:31:58,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:31:58,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:31:58,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732483440] [2023-08-30 07:31:58,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732483440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:31:58,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:31:58,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:31:58,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962399748] [2023-08-30 07:31:58,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:31:58,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:31:58,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:31:58,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:31:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:31:58,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 495 [2023-08-30 07:31:58,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:58,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:31:58,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 495 [2023-08-30 07:31:58,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:31:59,771 INFO L130 PetriNetUnfolder]: 9642/11941 cut-off events. [2023-08-30 07:31:59,772 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2023-08-30 07:31:59,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24030 conditions, 11941 events. 9642/11941 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 1163. Compared 53529 event pairs, 4611 based on Foata normal form. 0/2839 useless extension candidates. Maximal degree in co-relation 21804. Up to 11861 conditions per place. [2023-08-30 07:31:59,829 INFO L137 encePairwiseOnDemand]: 490/495 looper letters, 54 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-30 07:31:59,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 244 flow [2023-08-30 07:31:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:31:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:31:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 671 transitions. [2023-08-30 07:31:59,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2023-08-30 07:31:59,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 671 transitions. [2023-08-30 07:31:59,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 671 transitions. [2023-08-30 07:31:59,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:31:59,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 671 transitions. [2023-08-30 07:31:59,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:59,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:59,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:59,863 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 142 flow. Second operand 3 states and 671 transitions. [2023-08-30 07:31:59,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 244 flow [2023-08-30 07:31:59,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 07:31:59,875 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 124 flow [2023-08-30 07:31:59,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-08-30 07:31:59,878 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -8 predicate places. [2023-08-30 07:31:59,879 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 124 flow [2023-08-30 07:31:59,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:31:59,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:31:59,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:31:59,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 07:32:00,087 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 07:32:00,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:32:00,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:32:00,088 INFO L85 PathProgramCache]: Analyzing trace with hash 29774, now seen corresponding path program 1 times [2023-08-30 07:32:00,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:32:00,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516922907] [2023-08-30 07:32:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:32:00,089 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 07:32:00,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:32:00,090 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 07:32:00,092 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 07:32:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:32:00,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:32:00,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:32:00,219 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:32:00,219 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 07:32:00,242 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 07:32:00,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:32:00,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:32:00,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516922907] [2023-08-30 07:32:00,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516922907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:32:00,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:32:00,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:32:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534538555] [2023-08-30 07:32:00,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:32:00,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:32:00,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:32:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:32:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:32:00,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 495 [2023-08-30 07:32:00,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:00,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:32:00,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 495 [2023-08-30 07:32:00,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:32:02,161 INFO L130 PetriNetUnfolder]: 19283/23878 cut-off events. [2023-08-30 07:32:02,162 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 07:32:02,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47762 conditions, 23878 events. 19283/23878 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 2206. Compared 116217 event pairs, 9222 based on Foata normal form. 0/5680 useless extension candidates. Maximal degree in co-relation 47756. Up to 11862 conditions per place. [2023-08-30 07:32:02,257 INFO L137 encePairwiseOnDemand]: 486/495 looper letters, 100 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2023-08-30 07:32:02,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 109 transitions, 444 flow [2023-08-30 07:32:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:32:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:32:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2023-08-30 07:32:02,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855218855218855 [2023-08-30 07:32:02,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2023-08-30 07:32:02,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2023-08-30 07:32:02,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:32:02,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2023-08-30 07:32:02,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:02,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:02,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:02,264 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 124 flow. Second operand 3 states and 721 transitions. [2023-08-30 07:32:02,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 109 transitions, 444 flow [2023-08-30 07:32:02,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 109 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:32:02,267 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 173 flow [2023-08-30 07:32:02,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-08-30 07:32:02,268 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-08-30 07:32:02,268 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 173 flow [2023-08-30 07:32:02,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:02,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:32:02,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:32:02,279 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 07:32:02,477 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 07:32:02,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:32:02,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:32:02,478 INFO L85 PathProgramCache]: Analyzing trace with hash 925829, now seen corresponding path program 1 times [2023-08-30 07:32:02,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:32:02,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136531227] [2023-08-30 07:32:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:32:02,478 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 07:32:02,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:32:02,480 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 07:32:02,482 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 07:32:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:32:02,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:32:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:32:02,623 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:32:02,624 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 07:32:02,677 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 07:32:02,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:32:02,810 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 07:32:02,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:32:02,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136531227] [2023-08-30 07:32:02,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136531227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:32:02,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:32:02,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:32:02,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932350514] [2023-08-30 07:32:02,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:32:02,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:32:02,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:32:02,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:32:02,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:32:03,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 495 [2023-08-30 07:32:03,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:03,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:32:03,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 495 [2023-08-30 07:32:03,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:32:07,643 INFO L130 PetriNetUnfolder]: 28934/35831 cut-off events. [2023-08-30 07:32:07,643 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 07:32:07,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71711 conditions, 35831 events. 28934/35831 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 2687. Compared 180063 event pairs, 13833 based on Foata normal form. 0/8542 useless extension candidates. Maximal degree in co-relation 71702. Up to 11863 conditions per place. [2023-08-30 07:32:07,790 INFO L137 encePairwiseOnDemand]: 483/495 looper letters, 146 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2023-08-30 07:32:07,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 176 transitions, 799 flow [2023-08-30 07:32:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:32:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:32:07,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1316 transitions. [2023-08-30 07:32:07,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430976430976431 [2023-08-30 07:32:07,793 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1316 transitions. [2023-08-30 07:32:07,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1316 transitions. [2023-08-30 07:32:07,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:32:07,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1316 transitions. [2023-08-30 07:32:07,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.33333333333334) internal successors, (1316), 6 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:07,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:07,801 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:07,801 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 173 flow. Second operand 6 states and 1316 transitions. [2023-08-30 07:32:07,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 176 transitions, 799 flow [2023-08-30 07:32:07,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 176 transitions, 775 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:32:07,804 INFO L231 Difference]: Finished difference. Result has 67 places, 84 transitions, 365 flow [2023-08-30 07:32:07,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=67, PETRI_TRANSITIONS=84} [2023-08-30 07:32:07,805 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-30 07:32:07,805 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 84 transitions, 365 flow [2023-08-30 07:32:07,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:07,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:32:07,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:32:07,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-08-30 07:32:08,015 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 07:32:08,016 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:32:08,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:32:08,016 INFO L85 PathProgramCache]: Analyzing trace with hash 28717495, now seen corresponding path program 1 times [2023-08-30 07:32:08,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:32:08,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441026944] [2023-08-30 07:32:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:32:08,017 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 07:32:08,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:32:08,017 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 07:32:08,018 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 07:32:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:32:08,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 07:32:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:32:08,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:32:08,164 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 07:32:08,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 07:32:08,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:32:08,402 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-30 07:32:08,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 07:32:08,638 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-30 07:32:08,638 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 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-30 07:32:11,040 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 07:32:11,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:32:11,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:32:11,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441026944] [2023-08-30 07:32:11,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441026944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:32:11,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:32:11,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:32:11,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514291969] [2023-08-30 07:32:11,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:32:11,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:32:11,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:32:11,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:32:11,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-08-30 07:32:13,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:32:15,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:32:18,057 WARN L539 Checker$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 07:32:20,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:32:22,160 WARN L539 Checker$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 07:32:24,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:32:26,431 WARN L539 Checker$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 07:32:26,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 495 [2023-08-30 07:32:26,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 365 flow. Second operand has 5 states, 5 states have (on average 174.8) internal successors, (874), 5 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:26,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:32:26,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 495 [2023-08-30 07:32:26,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:32:28,695 INFO L130 PetriNetUnfolder]: 22362/27960 cut-off events. [2023-08-30 07:32:28,695 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-30 07:32:28,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56031 conditions, 27960 events. 22362/27960 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 2341. Compared 142301 event pairs, 10683 based on Foata normal form. 0/7115 useless extension candidates. Maximal degree in co-relation 56018. Up to 27720 conditions per place. [2023-08-30 07:32:28,816 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 76 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-30 07:32:28,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 499 flow [2023-08-30 07:32:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:32:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:32:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-08-30 07:32:28,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38855218855218854 [2023-08-30 07:32:28,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-08-30 07:32:28,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-08-30 07:32:28,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:32:28,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-08-30 07:32:28,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:28,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:28,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:28,823 INFO L175 Difference]: Start difference. First operand has 67 places, 84 transitions, 365 flow. Second operand 3 states and 577 transitions. [2023-08-30 07:32:28,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 499 flow [2023-08-30 07:32:28,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 469 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 07:32:28,825 INFO L231 Difference]: Finished difference. Result has 66 places, 80 transitions, 317 flow [2023-08-30 07:32:28,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=66, PETRI_TRANSITIONS=80} [2023-08-30 07:32:28,826 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-30 07:32:28,827 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 80 transitions, 317 flow [2023-08-30 07:32:28,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.8) internal successors, (874), 5 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:28,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:32:28,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 07:32:28,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:32:29,048 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 07:32:29,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:32:29,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:32:29,049 INFO L85 PathProgramCache]: Analyzing trace with hash 28717496, now seen corresponding path program 1 times [2023-08-30 07:32:29,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:32:29,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688715245] [2023-08-30 07:32:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:32:29,049 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 07:32:29,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:32:29,050 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 07:32:29,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 07:32:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:32:29,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 07:32:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:32:29,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:32:29,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:32:29,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:32:29,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:32:29,195 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 07:32:29,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 07:32:29,210 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 07:32:29,210 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 07:32:29,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:32:29,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:32:29,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:32:29,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:32:29,282 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 07:32:29,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:32:29,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:32:29,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688715245] [2023-08-30 07:32:29,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688715245] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:32:29,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:32:29,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:32:29,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378882870] [2023-08-30 07:32:29,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:32:29,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:32:29,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:32:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:32:29,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:32:29,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 495 [2023-08-30 07:32:29,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 80 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:29,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:32:29,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 495 [2023-08-30 07:32:29,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:32:30,942 INFO L130 PetriNetUnfolder]: 15790/20089 cut-off events. [2023-08-30 07:32:30,943 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-08-30 07:32:30,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40263 conditions, 20089 events. 15790/20089 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 1518. Compared 103825 event pairs, 7533 based on Foata normal form. 0/5693 useless extension candidates. Maximal degree in co-relation 40249. Up to 19849 conditions per place. [2023-08-30 07:32:31,019 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 72 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-30 07:32:31,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 443 flow [2023-08-30 07:32:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:32:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:32:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-08-30 07:32:31,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46195286195286195 [2023-08-30 07:32:31,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-08-30 07:32:31,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-08-30 07:32:31,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:32:31,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-08-30 07:32:31,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:31,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:31,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:31,029 INFO L175 Difference]: Start difference. First operand has 66 places, 80 transitions, 317 flow. Second operand 3 states and 686 transitions. [2023-08-30 07:32:31,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 443 flow [2023-08-30 07:32:31,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:32:31,031 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 298 flow [2023-08-30 07:32:31,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2023-08-30 07:32:31,032 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-08-30 07:32:31,032 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 298 flow [2023-08-30 07:32:31,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:31,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:32:31,033 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:32:31,043 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 07:32:31,236 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 07:32:31,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:32:31,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:32:31,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1814383118, now seen corresponding path program 2 times [2023-08-30 07:32:31,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:32:31,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548929154] [2023-08-30 07:32:31,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:32:31,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:32:31,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:32:31,240 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 07:32:31,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 07:32:31,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:32:31,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:32:31,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:32:31,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:32:31,387 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:32:31,388 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 07:32:31,489 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 07:32:31,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:32:31,958 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 07:32:31,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:32:31,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548929154] [2023-08-30 07:32:31,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548929154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:32:31,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:32:31,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:32:31,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864590873] [2023-08-30 07:32:31,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:32:31,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:32:31,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:32:31,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:32:31,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:32:35,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 495 [2023-08-30 07:32:35,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 298 flow. Second operand has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:32:35,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:32:35,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 495 [2023-08-30 07:32:35,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:32:38,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:39,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:40,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:43,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:44,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:47,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:48,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:32:52,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:33:03,890 INFO L130 PetriNetUnfolder]: 52614/66920 cut-off events. [2023-08-30 07:33:03,890 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 07:33:03,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134005 conditions, 66920 events. 52614/66920 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 3076. Compared 378801 event pairs, 25110 based on Foata normal form. 18/18971 useless extension candidates. Maximal degree in co-relation 133990. Up to 6629 conditions per place. [2023-08-30 07:33:04,165 INFO L137 encePairwiseOnDemand]: 485/495 looper letters, 428 selfloop transitions, 52 changer transitions 0/483 dead transitions. [2023-08-30 07:33:04,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 483 transitions, 2278 flow [2023-08-30 07:33:04,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:33:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:33:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2802 transitions. [2023-08-30 07:33:04,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717171717171717 [2023-08-30 07:33:04,172 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2802 transitions. [2023-08-30 07:33:04,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2802 transitions. [2023-08-30 07:33:04,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:33:04,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2802 transitions. [2023-08-30 07:33:04,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 233.5) internal successors, (2802), 12 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:04,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:04,182 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:04,182 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 298 flow. Second operand 12 states and 2802 transitions. [2023-08-30 07:33:04,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 483 transitions, 2278 flow [2023-08-30 07:33:04,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 483 transitions, 2277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:33:04,188 INFO L231 Difference]: Finished difference. Result has 82 places, 107 transitions, 687 flow [2023-08-30 07:33:04,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=687, PETRI_PLACES=82, PETRI_TRANSITIONS=107} [2023-08-30 07:33:04,188 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2023-08-30 07:33:04,188 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 107 transitions, 687 flow [2023-08-30 07:33:04,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:04,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:33:04,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:33:04,213 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 07:33:04,396 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 07:33:04,396 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:33:04,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:33:04,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1827731773, now seen corresponding path program 1 times [2023-08-30 07:33:04,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:33:04,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592133822] [2023-08-30 07:33:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:33:04,397 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 07:33:04,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:33:04,398 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 07:33:04,399 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 07:33:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:33:04,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:33:04,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:33:04,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:33:04,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:33:04,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:33:04,558 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 07:33:04,558 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 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 07:33:04,578 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 07:33:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:33:04,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:33:04,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:33:04,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:33:04,682 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 07:33:04,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:33:04,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:33:04,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592133822] [2023-08-30 07:33:04,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592133822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:33:04,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:33:04,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:33:04,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821708400] [2023-08-30 07:33:04,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:33:04,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:33:04,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:33:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:33:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:33:04,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 495 [2023-08-30 07:33:04,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 107 transitions, 687 flow. Second operand has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:04,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:33:04,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 495 [2023-08-30 07:33:04,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:33:09,569 INFO L130 PetriNetUnfolder]: 50544/64230 cut-off events. [2023-08-30 07:33:09,569 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-08-30 07:33:09,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128744 conditions, 64230 events. 50544/64230 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 2695. Compared 361545 event pairs, 24120 based on Foata normal form. 0/18528 useless extension candidates. Maximal degree in co-relation 128721. Up to 63430 conditions per place. [2023-08-30 07:33:09,869 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 101 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-08-30 07:33:09,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 887 flow [2023-08-30 07:33:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:33:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:33:09,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2023-08-30 07:33:09,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46060606060606063 [2023-08-30 07:33:09,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2023-08-30 07:33:09,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2023-08-30 07:33:09,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:33:09,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2023-08-30 07:33:09,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:09,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:09,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:09,875 INFO L175 Difference]: Start difference. First operand has 82 places, 107 transitions, 687 flow. Second operand 3 states and 684 transitions. [2023-08-30 07:33:09,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 887 flow [2023-08-30 07:33:09,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 794 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 07:33:09,878 INFO L231 Difference]: Finished difference. Result has 78 places, 105 transitions, 592 flow [2023-08-30 07:33:09,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=592, PETRI_PLACES=78, PETRI_TRANSITIONS=105} [2023-08-30 07:33:09,879 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2023-08-30 07:33:09,879 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 105 transitions, 592 flow [2023-08-30 07:33:09,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:09,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:33:09,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:33:09,887 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 (8)] Ended with exit code 0 [2023-08-30 07:33:10,087 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 07:33:10,087 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:33:10,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:33:10,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1827731774, now seen corresponding path program 1 times [2023-08-30 07:33:10,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:33:10,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149817737] [2023-08-30 07:33:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:33:10,088 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 07:33:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:33:10,089 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 07:33:10,091 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 07:33:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:33:10,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 07:33:10,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:33:10,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:33:10,223 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 07:33:10,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 07:33:10,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:33:10,369 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-30 07:33:10,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 07:33:12,522 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 07:33:12,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 07:33:14,617 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 07:33:14,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:33:14,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:33:14,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149817737] [2023-08-30 07:33:14,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149817737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:33:14,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:33:14,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:33:14,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416193112] [2023-08-30 07:33:14,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:33:14,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:33:14,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:33:14,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:33:14,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2023-08-30 07:33:17,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:33:19,441 WARN L539 Checker$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 07:33:21,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:33:23,502 WARN L539 Checker$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 07:33:25,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:33:28,071 WARN L539 Checker$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 07:33:30,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:33:32,116 WARN L539 Checker$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 07:33:34,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:33:36,152 WARN L539 Checker$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 07:33:38,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:33:40,165 WARN L539 Checker$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 07:33:42,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 07:33:44,205 WARN L539 Checker$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 07:33:44,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 495 [2023-08-30 07:33:44,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 105 transitions, 592 flow. Second operand has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:44,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:33:44,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 495 [2023-08-30 07:33:44,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:33:50,946 INFO L130 PetriNetUnfolder]: 48474/61540 cut-off events. [2023-08-30 07:33:50,947 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-30 07:33:51,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123307 conditions, 61540 events. 48474/61540 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 2634. Compared 343401 event pairs, 23130 based on Foata normal form. 0/18120 useless extension candidates. Maximal degree in co-relation 123283. Up to 60740 conditions per place. [2023-08-30 07:33:51,249 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 99 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-08-30 07:33:51,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 788 flow [2023-08-30 07:33:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:33:51,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:33:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 571 transitions. [2023-08-30 07:33:51,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3845117845117845 [2023-08-30 07:33:51,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 571 transitions. [2023-08-30 07:33:51,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 571 transitions. [2023-08-30 07:33:51,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:33:51,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 571 transitions. [2023-08-30 07:33:51,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:51,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:51,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:51,255 INFO L175 Difference]: Start difference. First operand has 78 places, 105 transitions, 592 flow. Second operand 3 states and 571 transitions. [2023-08-30 07:33:51,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 788 flow [2023-08-30 07:33:51,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 787 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:33:51,258 INFO L231 Difference]: Finished difference. Result has 77 places, 103 transitions, 589 flow [2023-08-30 07:33:51,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=589, PETRI_PLACES=77, PETRI_TRANSITIONS=103} [2023-08-30 07:33:51,258 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-08-30 07:33:51,258 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 103 transitions, 589 flow [2023-08-30 07:33:51,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:51,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:33:51,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:33:51,266 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 07:33:51,460 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 07:33:51,461 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:33:51,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:33:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash 825103132, now seen corresponding path program 1 times [2023-08-30 07:33:51,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:33:51,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724182617] [2023-08-30 07:33:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:33:51,462 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 07:33:51,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:33:51,463 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 07:33:51,464 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 07:33:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:33:51,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:33:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:33:51,575 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 07:33:51,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:33:51,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:33:51,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724182617] [2023-08-30 07:33:51,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724182617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:33:51,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:33:51,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:33:51,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805842269] [2023-08-30 07:33:51,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:33:51,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:33:51,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:33:51,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:33:51,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:33:51,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 495 [2023-08-30 07:33:51,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 103 transitions, 589 flow. Second operand has 5 states, 5 states have (on average 203.4) internal successors, (1017), 5 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:51,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:33:51,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 495 [2023-08-30 07:33:51,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:33:55,772 INFO L130 PetriNetUnfolder]: 39814/52152 cut-off events. [2023-08-30 07:33:55,772 INFO L131 PetriNetUnfolder]: For 255/255 co-relation queries the response was YES. [2023-08-30 07:33:55,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104609 conditions, 52152 events. 39814/52152 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 2537. Compared 310309 event pairs, 21610 based on Foata normal form. 2/17345 useless extension candidates. Maximal degree in co-relation 104584. Up to 49043 conditions per place. [2023-08-30 07:33:56,086 INFO L137 encePairwiseOnDemand]: 482/495 looper letters, 129 selfloop transitions, 28 changer transitions 0/159 dead transitions. [2023-08-30 07:33:56,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 159 transitions, 1033 flow [2023-08-30 07:33:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:33:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:33:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1126 transitions. [2023-08-30 07:33:56,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45494949494949494 [2023-08-30 07:33:56,089 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1126 transitions. [2023-08-30 07:33:56,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1126 transitions. [2023-08-30 07:33:56,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:33:56,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1126 transitions. [2023-08-30 07:33:56,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:56,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:56,094 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:56,094 INFO L175 Difference]: Start difference. First operand has 77 places, 103 transitions, 589 flow. Second operand 5 states and 1126 transitions. [2023-08-30 07:33:56,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 159 transitions, 1033 flow [2023-08-30 07:33:56,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 159 transitions, 1032 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:33:56,098 INFO L231 Difference]: Finished difference. Result has 83 places, 106 transitions, 704 flow [2023-08-30 07:33:56,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=704, PETRI_PLACES=83, PETRI_TRANSITIONS=106} [2023-08-30 07:33:56,098 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 18 predicate places. [2023-08-30 07:33:56,098 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 106 transitions, 704 flow [2023-08-30 07:33:56,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.4) internal successors, (1017), 5 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:56,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:33:56,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:33:56,111 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 07:33:56,301 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 07:33:56,301 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:33:56,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:33:56,301 INFO L85 PathProgramCache]: Analyzing trace with hash -191367404, now seen corresponding path program 1 times [2023-08-30 07:33:56,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:33:56,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598358847] [2023-08-30 07:33:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:33:56,302 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 07:33:56,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:33:56,303 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 07:33:56,305 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 07:33:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:33:56,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:33:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:33:56,432 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 07:33:56,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 07:33:56,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:33:56,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 07:33:56,492 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 07:33:56,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 07:33:56,530 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 07:33:56,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:33:56,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:33:56,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598358847] [2023-08-30 07:33:56,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598358847] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:33:56,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:33:56,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:33:56,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147091411] [2023-08-30 07:33:56,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:33:56,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:33:56,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:33:56,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:33:56,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:33:56,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 495 [2023-08-30 07:33:56,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 106 transitions, 704 flow. Second operand has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:33:56,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:33:56,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 495 [2023-08-30 07:33:56,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:34:01,046 INFO L130 PetriNetUnfolder]: 43602/55069 cut-off events. [2023-08-30 07:34:01,047 INFO L131 PetriNetUnfolder]: For 1584/1709 co-relation queries the response was YES. [2023-08-30 07:34:01,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122335 conditions, 55069 events. 43602/55069 cut-off events. For 1584/1709 co-relation queries the response was YES. Maximal size of possible extension queue 2256. Compared 304402 event pairs, 20448 based on Foata normal form. 125/19195 useless extension candidates. Maximal degree in co-relation 122306. Up to 54409 conditions per place. [2023-08-30 07:34:01,425 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 99 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-08-30 07:34:01,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 900 flow [2023-08-30 07:34:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:34:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:34:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2023-08-30 07:34:01,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4498316498316498 [2023-08-30 07:34:01,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2023-08-30 07:34:01,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2023-08-30 07:34:01,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:34:01,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2023-08-30 07:34:01,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:01,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:01,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:01,431 INFO L175 Difference]: Start difference. First operand has 83 places, 106 transitions, 704 flow. Second operand 3 states and 668 transitions. [2023-08-30 07:34:01,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 900 flow [2023-08-30 07:34:01,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 868 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 07:34:01,447 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 670 flow [2023-08-30 07:34:01,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=670, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2023-08-30 07:34:01,448 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2023-08-30 07:34:01,448 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 670 flow [2023-08-30 07:34:01,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:01,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:34:01,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:34:01,456 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 07:34:01,649 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 07:34:01,649 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:34:01,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:34:01,650 INFO L85 PathProgramCache]: Analyzing trace with hash -191367406, now seen corresponding path program 1 times [2023-08-30 07:34:01,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:34:01,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308280527] [2023-08-30 07:34:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:34:01,650 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 07:34:01,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:34:01,651 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 07:34:01,652 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 07:34:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:34:01,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:34:01,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:34:01,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:34:01,813 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 07:34:01,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-30 07:34:01,826 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 454 treesize of output 442 [2023-08-30 07:34:01,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:34:01,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:34:01,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:34:01,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:34:01,947 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 07:34:01,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:34:01,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:34:01,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308280527] [2023-08-30 07:34:01,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308280527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:34:01,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:34:01,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:34:01,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480965598] [2023-08-30 07:34:01,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:34:01,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:34:01,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:34:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:34:01,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:34:02,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 495 [2023-08-30 07:34:02,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 670 flow. Second operand has 5 states, 5 states have (on average 210.6) internal successors, (1053), 5 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:02,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:34:02,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 495 [2023-08-30 07:34:02,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:34:06,911 INFO L130 PetriNetUnfolder]: 41311/52052 cut-off events. [2023-08-30 07:34:06,911 INFO L131 PetriNetUnfolder]: For 1383/1499 co-relation queries the response was YES. [2023-08-30 07:34:07,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115485 conditions, 52052 events. 41311/52052 cut-off events. For 1383/1499 co-relation queries the response was YES. Maximal size of possible extension queue 2113. Compared 283846 event pairs, 19295 based on Foata normal form. 116/18594 useless extension candidates. Maximal degree in co-relation 115455. Up to 51392 conditions per place. [2023-08-30 07:34:07,212 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 97 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-08-30 07:34:07,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 102 transitions, 862 flow [2023-08-30 07:34:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:34:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:34:07,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-08-30 07:34:07,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45252525252525255 [2023-08-30 07:34:07,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-08-30 07:34:07,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-08-30 07:34:07,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:34:07,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-08-30 07:34:07,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:07,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:07,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:07,226 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 670 flow. Second operand 3 states and 672 transitions. [2023-08-30 07:34:07,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 102 transitions, 862 flow [2023-08-30 07:34:07,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 102 transitions, 861 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:34:07,236 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 667 flow [2023-08-30 07:34:07,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=667, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2023-08-30 07:34:07,236 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 16 predicate places. [2023-08-30 07:34:07,236 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 667 flow [2023-08-30 07:34:07,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.6) internal successors, (1053), 5 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:07,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:34:07,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:34:07,247 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 07:34:07,443 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 07:34:07,444 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:34:07,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:34:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1637429100, now seen corresponding path program 1 times [2023-08-30 07:34:07,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:34:07,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889094707] [2023-08-30 07:34:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:34:07,445 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 07:34:07,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:34:07,445 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 07:34:07,446 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 07:34:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:34:07,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:34:07,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:34:07,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 07:34:07,536 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 07:34:07,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:34:07,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:34:07,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889094707] [2023-08-30 07:34:07,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889094707] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:34:07,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:34:07,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:34:07,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730174856] [2023-08-30 07:34:07,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:34:07,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:34:07,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:34:07,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:34:07,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:34:07,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 495 [2023-08-30 07:34:07,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 667 flow. Second operand has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:07,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:34:07,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 495 [2023-08-30 07:34:07,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:34:11,019 INFO L130 PetriNetUnfolder]: 30671/38892 cut-off events. [2023-08-30 07:34:11,019 INFO L131 PetriNetUnfolder]: For 1103/1190 co-relation queries the response was YES. [2023-08-30 07:34:11,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86502 conditions, 38892 events. 30671/38892 cut-off events. For 1103/1190 co-relation queries the response was YES. Maximal size of possible extension queue 1589. Compared 208614 event pairs, 14069 based on Foata normal form. 87/14954 useless extension candidates. Maximal degree in co-relation 86471. Up to 38237 conditions per place. [2023-08-30 07:34:11,195 INFO L137 encePairwiseOnDemand]: 491/495 looper letters, 90 selfloop transitions, 6 changer transitions 0/100 dead transitions. [2023-08-30 07:34:11,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 855 flow [2023-08-30 07:34:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:34:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:34:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 847 transitions. [2023-08-30 07:34:11,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2023-08-30 07:34:11,198 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 847 transitions. [2023-08-30 07:34:11,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 847 transitions. [2023-08-30 07:34:11,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:34:11,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 847 transitions. [2023-08-30 07:34:11,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.75) internal successors, (847), 4 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:11,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:11,202 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:11,202 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 667 flow. Second operand 4 states and 847 transitions. [2023-08-30 07:34:11,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 855 flow [2023-08-30 07:34:11,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 854 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:34:11,210 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 674 flow [2023-08-30 07:34:11,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=674, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2023-08-30 07:34:11,212 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 16 predicate places. [2023-08-30 07:34:11,212 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 674 flow [2023-08-30 07:34:11,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:11,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:34:11,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:34:11,220 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 07:34:11,417 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 07:34:11,417 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:34:11,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:34:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1637429101, now seen corresponding path program 1 times [2023-08-30 07:34:11,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:34:11,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332971517] [2023-08-30 07:34:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:34:11,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:34:11,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:34:11,419 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 07:34:11,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 07:34:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:34:11,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:34:11,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:34:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:34:11,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:34:11,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:34:11,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332971517] [2023-08-30 07:34:11,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332971517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:34:11,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:34:11,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:34:11,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379518315] [2023-08-30 07:34:11,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:34:11,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:34:11,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:34:11,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:34:11,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:34:11,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 495 [2023-08-30 07:34:11,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 674 flow. Second operand has 5 states, 5 states have (on average 203.8) internal successors, (1019), 5 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:11,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:34:11,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 495 [2023-08-30 07:34:11,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:34:14,135 INFO L130 PetriNetUnfolder]: 24453/32504 cut-off events. [2023-08-30 07:34:14,135 INFO L131 PetriNetUnfolder]: For 1811/1846 co-relation queries the response was YES. [2023-08-30 07:34:14,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73421 conditions, 32504 events. 24453/32504 cut-off events. For 1811/1846 co-relation queries the response was YES. Maximal size of possible extension queue 1477. Compared 187003 event pairs, 13672 based on Foata normal form. 35/14514 useless extension candidates. Maximal degree in co-relation 73389. Up to 31529 conditions per place. [2023-08-30 07:34:14,307 INFO L137 encePairwiseOnDemand]: 481/495 looper letters, 101 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2023-08-30 07:34:14,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 132 transitions, 1012 flow [2023-08-30 07:34:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:34:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:34:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1097 transitions. [2023-08-30 07:34:14,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44323232323232326 [2023-08-30 07:34:14,311 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1097 transitions. [2023-08-30 07:34:14,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1097 transitions. [2023-08-30 07:34:14,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:34:14,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1097 transitions. [2023-08-30 07:34:14,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.4) internal successors, (1097), 5 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:14,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:14,315 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:14,315 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 674 flow. Second operand 5 states and 1097 transitions. [2023-08-30 07:34:14,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 132 transitions, 1012 flow [2023-08-30 07:34:14,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 132 transitions, 1004 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:34:14,322 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 744 flow [2023-08-30 07:34:14,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=744, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2023-08-30 07:34:14,323 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2023-08-30 07:34:14,323 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 744 flow [2023-08-30 07:34:14,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.8) internal successors, (1019), 5 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:14,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:34:14,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:34:14,330 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 07:34:14,530 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 07:34:14,531 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:34:14,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:34:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash -414734544, now seen corresponding path program 1 times [2023-08-30 07:34:14,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:34:14,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560589207] [2023-08-30 07:34:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:34:14,531 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 07:34:14,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:34:14,533 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 07:34:14,533 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 07:34:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:34:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 07:34:14,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:34:14,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 07:34:14,872 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 07:34:14,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 07:34:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:34:14,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:34:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:34:15,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:34:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560589207] [2023-08-30 07:34:15,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560589207] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:34:15,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:34:15,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:34:15,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080480619] [2023-08-30 07:34:15,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:34:15,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:34:15,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:34:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:34:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:34:18,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 495 [2023-08-30 07:34:18,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 744 flow. Second operand has 12 states, 12 states have (on average 185.66666666666666) internal successors, (2228), 12 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:18,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:34:18,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 495 [2023-08-30 07:34:18,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:34:34,299 INFO L130 PetriNetUnfolder]: 114727/148522 cut-off events. [2023-08-30 07:34:34,300 INFO L131 PetriNetUnfolder]: For 13325/13365 co-relation queries the response was YES. [2023-08-30 07:34:34,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365648 conditions, 148522 events. 114727/148522 cut-off events. For 13325/13365 co-relation queries the response was YES. Maximal size of possible extension queue 5891. Compared 982809 event pairs, 46342 based on Foata normal form. 149/66682 useless extension candidates. Maximal degree in co-relation 365614. Up to 46273 conditions per place. [2023-08-30 07:34:35,345 INFO L137 encePairwiseOnDemand]: 481/495 looper letters, 512 selfloop transitions, 68 changer transitions 0/583 dead transitions. [2023-08-30 07:34:35,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 583 transitions, 3720 flow [2023-08-30 07:34:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 07:34:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 07:34:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4757 transitions. [2023-08-30 07:34:35,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178304787000439 [2023-08-30 07:34:35,353 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4757 transitions. [2023-08-30 07:34:35,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4757 transitions. [2023-08-30 07:34:35,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:34:35,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4757 transitions. [2023-08-30 07:34:35,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 206.82608695652175) internal successors, (4757), 23 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:35,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 495.0) internal successors, (11880), 24 states have internal predecessors, (11880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:35,368 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 495.0) internal successors, (11880), 24 states have internal predecessors, (11880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:35,368 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 744 flow. Second operand 23 states and 4757 transitions. [2023-08-30 07:34:35,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 583 transitions, 3720 flow [2023-08-30 07:34:35,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 583 transitions, 3633 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:34:35,880 INFO L231 Difference]: Finished difference. Result has 121 places, 139 transitions, 1272 flow [2023-08-30 07:34:35,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1272, PETRI_PLACES=121, PETRI_TRANSITIONS=139} [2023-08-30 07:34:35,880 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 56 predicate places. [2023-08-30 07:34:35,880 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 139 transitions, 1272 flow [2023-08-30 07:34:35,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 185.66666666666666) internal successors, (2228), 12 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:35,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:34:35,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:34:35,893 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 (15)] Ended with exit code 0 [2023-08-30 07:34:36,093 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 07:34:36,093 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:34:36,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:34:36,093 INFO L85 PathProgramCache]: Analyzing trace with hash -414734678, now seen corresponding path program 1 times [2023-08-30 07:34:36,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:34:36,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938105735] [2023-08-30 07:34:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:34:36,094 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 07:34:36,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:34:36,095 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 07:34:36,095 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 07:34:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:34:36,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 07:34:36,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:34:36,310 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:34:36,310 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 07:34:36,387 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:34:36,388 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 07:34:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:34:36,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 07:34:36,496 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 07:34:36,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 07:34:36,534 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 07:34:36,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 07:34:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:34:36,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:34:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:34:44,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:34:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938105735] [2023-08-30 07:34:44,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938105735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:34:44,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:34:44,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:34:44,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959676607] [2023-08-30 07:34:44,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:34:44,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:34:44,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:34:44,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:34:44,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:34:50,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 495 [2023-08-30 07:34:50,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 139 transitions, 1272 flow. Second operand has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:34:50,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:34:50,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 495 [2023-08-30 07:34:50,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:35:02,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:35:05,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:35:30,127 INFO L130 PetriNetUnfolder]: 113306/146024 cut-off events. [2023-08-30 07:35:30,127 INFO L131 PetriNetUnfolder]: For 104198/104238 co-relation queries the response was YES. [2023-08-30 07:35:31,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396098 conditions, 146024 events. 113306/146024 cut-off events. For 104198/104238 co-relation queries the response was YES. Maximal size of possible extension queue 5795. Compared 961384 event pairs, 29829 based on Foata normal form. 40/68355 useless extension candidates. Maximal degree in co-relation 396048. Up to 45343 conditions per place. [2023-08-30 07:35:31,544 INFO L137 encePairwiseOnDemand]: 479/495 looper letters, 427 selfloop transitions, 113 changer transitions 0/543 dead transitions. [2023-08-30 07:35:31,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 543 transitions, 3809 flow [2023-08-30 07:35:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 07:35:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 07:35:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4675 transitions. [2023-08-30 07:35:31,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39351851851851855 [2023-08-30 07:35:31,553 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4675 transitions. [2023-08-30 07:35:31,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4675 transitions. [2023-08-30 07:35:31,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:35:31,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4675 transitions. [2023-08-30 07:35:31,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 194.79166666666666) internal successors, (4675), 24 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:35:31,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 495.0) internal successors, (12375), 25 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:35:31,568 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 495.0) internal successors, (12375), 25 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:35:31,568 INFO L175 Difference]: Start difference. First operand has 121 places, 139 transitions, 1272 flow. Second operand 24 states and 4675 transitions. [2023-08-30 07:35:31,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 543 transitions, 3809 flow [2023-08-30 07:35:33,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 543 transitions, 3754 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-30 07:35:33,012 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 1798 flow [2023-08-30 07:35:33,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1798, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2023-08-30 07:35:33,013 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 82 predicate places. [2023-08-30 07:35:33,013 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 1798 flow [2023-08-30 07:35:33,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:35:33,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:35:33,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:35:33,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 07:35:33,217 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 07:35:33,218 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:35:33,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:35:33,218 INFO L85 PathProgramCache]: Analyzing trace with hash -414734676, now seen corresponding path program 1 times [2023-08-30 07:35:33,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:35:33,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734353308] [2023-08-30 07:35:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:35:33,219 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 07:35:33,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:35:33,219 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 07:35:33,220 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 07:35:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:35:33,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 07:35:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:35:33,404 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:35:33,405 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 07:35:33,429 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 07:35:33,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 07:35:33,444 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 07:35:33,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 07:35:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:35:33,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:35:33,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:35:33,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734353308] [2023-08-30 07:35:33,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734353308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:35:33,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:35:33,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:35:33,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443503860] [2023-08-30 07:35:33,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:35:33,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:35:33,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:35:33,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:35:33,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:35:33,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 495 [2023-08-30 07:35:33,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 1798 flow. Second operand has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:35:33,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:35:33,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 495 [2023-08-30 07:35:33,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:35:45,947 INFO L130 PetriNetUnfolder]: 88142/112446 cut-off events. [2023-08-30 07:35:45,947 INFO L131 PetriNetUnfolder]: For 149799/152491 co-relation queries the response was YES. [2023-08-30 07:35:46,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344097 conditions, 112446 events. 88142/112446 cut-off events. For 149799/152491 co-relation queries the response was YES. Maximal size of possible extension queue 4215. Compared 695361 event pairs, 42658 based on Foata normal form. 7593/68106 useless extension candidates. Maximal degree in co-relation 344041. Up to 111297 conditions per place. [2023-08-30 07:35:47,163 INFO L137 encePairwiseOnDemand]: 491/495 looper letters, 156 selfloop transitions, 12 changer transitions 0/178 dead transitions. [2023-08-30 07:35:47,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 178 transitions, 2126 flow [2023-08-30 07:35:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:35:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:35:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 837 transitions. [2023-08-30 07:35:47,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2023-08-30 07:35:47,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 837 transitions. [2023-08-30 07:35:47,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 837 transitions. [2023-08-30 07:35:47,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:35:47,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 837 transitions. [2023-08-30 07:35:47,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:35:47,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:35:47,168 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:35:47,168 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 1798 flow. Second operand 4 states and 837 transitions. [2023-08-30 07:35:47,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 178 transitions, 2126 flow [2023-08-30 07:35:52,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 178 transitions, 1941 flow, removed 69 selfloop flow, removed 3 redundant places. [2023-08-30 07:35:52,809 INFO L231 Difference]: Finished difference. Result has 145 places, 178 transitions, 1629 flow [2023-08-30 07:35:52,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1629, PETRI_PLACES=145, PETRI_TRANSITIONS=178} [2023-08-30 07:35:52,809 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 80 predicate places. [2023-08-30 07:35:52,809 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 178 transitions, 1629 flow [2023-08-30 07:35:52,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:35:52,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:35:52,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:35:52,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 07:35:53,017 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 07:35:53,018 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:35:53,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:35:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash -414734545, now seen corresponding path program 1 times [2023-08-30 07:35:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:35:53,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460772481] [2023-08-30 07:35:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:35:53,018 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 07:35:53,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:35:53,019 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 07:35:53,020 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 07:35:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:35:53,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:35:53,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:35:53,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 07:35:53,166 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 07:35:53,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 07:35:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:35:53,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:35:53,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:35:53,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460772481] [2023-08-30 07:35:53,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460772481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:35:53,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:35:53,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:35:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580888641] [2023-08-30 07:35:53,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:35:53,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:35:53,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:35:53,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:35:53,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:35:53,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 495 [2023-08-30 07:35:53,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 178 transitions, 1629 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:35:53,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:35:53,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 495 [2023-08-30 07:35:53,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:36:02,279 INFO L130 PetriNetUnfolder]: 63492/81458 cut-off events. [2023-08-30 07:36:02,280 INFO L131 PetriNetUnfolder]: For 76526/78822 co-relation queries the response was YES. [2023-08-30 07:36:02,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233364 conditions, 81458 events. 63492/81458 cut-off events. For 76526/78822 co-relation queries the response was YES. Maximal size of possible extension queue 3084. Compared 492259 event pairs, 30513 based on Foata normal form. 2296/51293 useless extension candidates. Maximal degree in co-relation 233308. Up to 80610 conditions per place. [2023-08-30 07:36:03,136 INFO L137 encePairwiseOnDemand]: 491/495 looper letters, 132 selfloop transitions, 24 changer transitions 0/166 dead transitions. [2023-08-30 07:36:03,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 166 transitions, 1876 flow [2023-08-30 07:36:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:36:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:36:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 839 transitions. [2023-08-30 07:36:03,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42373737373737375 [2023-08-30 07:36:03,138 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 839 transitions. [2023-08-30 07:36:03,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 839 transitions. [2023-08-30 07:36:03,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:36:03,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 839 transitions. [2023-08-30 07:36:03,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:36:03,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:36:03,140 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:36:03,140 INFO L175 Difference]: Start difference. First operand has 145 places, 178 transitions, 1629 flow. Second operand 4 states and 839 transitions. [2023-08-30 07:36:03,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 166 transitions, 1876 flow [2023-08-30 07:36:05,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 166 transitions, 1863 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:36:05,098 INFO L231 Difference]: Finished difference. Result has 144 places, 166 transitions, 1599 flow [2023-08-30 07:36:05,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1599, PETRI_PLACES=144, PETRI_TRANSITIONS=166} [2023-08-30 07:36:05,099 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 79 predicate places. [2023-08-30 07:36:05,099 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 166 transitions, 1599 flow [2023-08-30 07:36:05,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:36:05,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:36:05,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:36:05,107 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 07:36:05,307 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 07:36:05,308 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:36:05,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:36:05,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1604115565, now seen corresponding path program 1 times [2023-08-30 07:36:05,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:36:05,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625064562] [2023-08-30 07:36:05,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:36:05,308 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 07:36:05,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:36:05,309 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 07:36:05,311 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 07:36:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:36:05,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:36:05,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:36:05,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 07:36:05,491 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 07:36:05,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:36:05,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:36:05,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625064562] [2023-08-30 07:36:05,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625064562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:36:05,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:36:05,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:36:05,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204302985] [2023-08-30 07:36:05,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:36:05,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:36:05,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:36:05,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:36:05,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:36:05,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 495 [2023-08-30 07:36:05,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 166 transitions, 1599 flow. Second operand has 6 states, 6 states have (on average 202.83333333333334) internal successors, (1217), 6 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:36:05,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:36:05,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 495 [2023-08-30 07:36:05,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:36:18,665 INFO L130 PetriNetUnfolder]: 90456/117462 cut-off events. [2023-08-30 07:36:18,666 INFO L131 PetriNetUnfolder]: For 139773/143497 co-relation queries the response was YES. [2023-08-30 07:36:19,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343565 conditions, 117462 events. 90456/117462 cut-off events. For 139773/143497 co-relation queries the response was YES. Maximal size of possible extension queue 4436. Compared 764914 event pairs, 32426 based on Foata normal form. 3724/80737 useless extension candidates. Maximal degree in co-relation 343509. Up to 76058 conditions per place. [2023-08-30 07:36:20,156 INFO L137 encePairwiseOnDemand]: 490/495 looper letters, 191 selfloop transitions, 14 changer transitions 0/214 dead transitions. [2023-08-30 07:36:20,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 214 transitions, 2277 flow [2023-08-30 07:36:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:36:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:36:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1065 transitions. [2023-08-30 07:36:20,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303030303030303 [2023-08-30 07:36:20,158 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1065 transitions. [2023-08-30 07:36:20,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1065 transitions. [2023-08-30 07:36:20,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:36:20,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1065 transitions. [2023-08-30 07:36:20,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:36:20,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:36:20,175 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:36:20,175 INFO L175 Difference]: Start difference. First operand has 144 places, 166 transitions, 1599 flow. Second operand 5 states and 1065 transitions. [2023-08-30 07:36:20,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 214 transitions, 2277 flow [2023-08-30 07:36:22,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 214 transitions, 2252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:36:22,626 INFO L231 Difference]: Finished difference. Result has 147 places, 167 transitions, 1610 flow [2023-08-30 07:36:22,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1610, PETRI_PLACES=147, PETRI_TRANSITIONS=167} [2023-08-30 07:36:22,627 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 82 predicate places. [2023-08-30 07:36:22,627 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 167 transitions, 1610 flow [2023-08-30 07:36:22,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.83333333333334) internal successors, (1217), 6 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:36:22,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:36:22,628 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:36:22,636 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 (19)] Ended with exit code 0 [2023-08-30 07:36:22,828 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 07:36:22,828 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:36:22,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:36:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash -182851922, now seen corresponding path program 3 times [2023-08-30 07:36:22,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:36:22,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227661662] [2023-08-30 07:36:22,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:36:22,829 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 07:36:22,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:36:22,829 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 07:36:22,832 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 07:36:22,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:36:22,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:36:22,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:36:22,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:36:23,052 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:36:23,053 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 07:36:23,300 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 07:36:23,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:36:25,213 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 07:36:25,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:36:25,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227661662] [2023-08-30 07:36:25,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227661662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:36:25,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:36:25,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:36:25,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39435688] [2023-08-30 07:36:25,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:36:25,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:36:25,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:36:25,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:36:25,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:36:41,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 495 [2023-08-30 07:36:41,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 167 transitions, 1610 flow. Second operand has 24 states, 24 states have (on average 193.0) internal successors, (4632), 24 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:36:41,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:36:41,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 495 [2023-08-30 07:36:41,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:36:50,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:36:52,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:36:53,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:36:55,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:36:57,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:36:59,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:01,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:03,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:05,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:07,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:11,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:12,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:15,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:16,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:19,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:21,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:24,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:26,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:28,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:30,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:32,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:34,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:36,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:38,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:40,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:43,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:44,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:46,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:48,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:50,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:51,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:54,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:55,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:37:58,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:00,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:02,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:05,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:06,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:08,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:10,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:12,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:14,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:16,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:18,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:24,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:28,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:38:57,504 INFO L130 PetriNetUnfolder]: 180760/234539 cut-off events. [2023-08-30 07:38:57,504 INFO L131 PetriNetUnfolder]: For 326728/337190 co-relation queries the response was YES. [2023-08-30 07:38:59,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702491 conditions, 234539 events. 180760/234539 cut-off events. For 326728/337190 co-relation queries the response was YES. Maximal size of possible extension queue 4930. Compared 1559392 event pairs, 96115 based on Foata normal form. 10501/165331 useless extension candidates. Maximal degree in co-relation 702434. Up to 64197 conditions per place. [2023-08-30 07:39:00,485 INFO L137 encePairwiseOnDemand]: 485/495 looper letters, 732 selfloop transitions, 167 changer transitions 0/909 dead transitions. [2023-08-30 07:39:00,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 909 transitions, 7835 flow [2023-08-30 07:39:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 07:39:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 07:39:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 8960 transitions. [2023-08-30 07:39:00,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209537232793047 [2023-08-30 07:39:00,493 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 8960 transitions. [2023-08-30 07:39:00,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 8960 transitions. [2023-08-30 07:39:00,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:39:00,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 8960 transitions. [2023-08-30 07:39:00,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 208.37209302325581) internal successors, (8960), 43 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:00,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 495.0) internal successors, (21780), 44 states have internal predecessors, (21780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:00,512 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 495.0) internal successors, (21780), 44 states have internal predecessors, (21780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:00,513 INFO L175 Difference]: Start difference. First operand has 147 places, 167 transitions, 1610 flow. Second operand 43 states and 8960 transitions. [2023-08-30 07:39:00,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 909 transitions, 7835 flow [2023-08-30 07:39:08,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 909 transitions, 7696 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 07:39:08,391 INFO L231 Difference]: Finished difference. Result has 202 places, 267 transitions, 3268 flow [2023-08-30 07:39:08,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=3268, PETRI_PLACES=202, PETRI_TRANSITIONS=267} [2023-08-30 07:39:08,392 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 137 predicate places. [2023-08-30 07:39:08,392 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 267 transitions, 3268 flow [2023-08-30 07:39:08,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 193.0) internal successors, (4632), 24 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:08,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:39:08,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:39:08,403 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 07:39:08,593 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 07:39:08,593 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 07:39:08,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:39:08,594 INFO L85 PathProgramCache]: Analyzing trace with hash 879343777, now seen corresponding path program 1 times [2023-08-30 07:39:08,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:39:08,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108480649] [2023-08-30 07:39:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:39:08,594 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 07:39:08,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:39:08,595 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 07:39:08,597 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 07:39:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:39:08,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 07:39:08,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:39:08,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 07:39:08,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 07:39:08,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:39:08,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 07:39:08,838 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 07:39:08,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 07:39:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:39:08,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:39:09,141 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:39:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:39:09,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:39:09,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108480649] [2023-08-30 07:39:09,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108480649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:39:09,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:39:09,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:39:09,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079049857] [2023-08-30 07:39:09,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:39:09,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:39:09,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:39:09,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:39:09,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:39:12,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:39:15,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:39:17,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:39:20,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 07:39:22,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:39:24,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:39:27,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:39:29,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:39:31,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:39:33,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:39:35,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:39:38,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:39:40,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:39:40,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 495 [2023-08-30 07:39:40,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 267 transitions, 3268 flow. Second operand has 12 states, 12 states have (on average 168.0) internal successors, (2016), 12 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:39:40,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:39:40,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 495 [2023-08-30 07:39:40,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:39:55,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]