./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:29:53,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:29:53,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:29:53,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:29:53,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:29:53,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:29:53,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:29:53,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:29:53,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:29:53,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:29:53,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:29:53,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:29:53,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:29:53,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:29:53,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:29:53,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:29:53,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:29:53,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:29:53,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:29:53,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:29:53,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:29:53,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:29:53,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:29:53,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:29:53,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:29:53,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:29:53,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:29:53,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:29:53,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:29:53,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:29:53,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:29:53,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:29:53,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:29:53,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:29:53,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:29:53,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:29:53,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:29:53,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:29:53,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:29:54,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:29:54,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:29:54,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:29:54,045 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:29:54,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:29:54,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:29:54,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:29:54,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:29:54,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:29:54,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:29:54,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:29:54,048 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:29:54,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:29:54,050 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:29:54,050 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:29:54,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:29:54,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:29:54,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:29:54,051 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:29:54,051 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:29:54,051 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:29:54,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:29:54,051 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:29:54,052 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:29:54,052 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:29:54,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:29:54,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:29:54,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:29:54,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:29:54,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:29:54,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:29:54,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:29:54,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:29:54,054 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:29:54,054 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:29:54,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:29:54,054 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:29:54,055 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:29:54,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:29:54,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:29:54,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:29:54,403 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:29:54,404 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:29:54,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-09-01 03:29:55,723 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:29:55,940 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:29:55,941 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-09-01 03:29:55,947 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/519310e85/e253bab64d0e4f7aa401d8b6198e2d6a/FLAGab54e4422 [2023-09-01 03:29:55,962 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/519310e85/e253bab64d0e4f7aa401d8b6198e2d6a [2023-09-01 03:29:55,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:29:55,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:29:55,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:29:55,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:29:55,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:29:55,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:29:55" (1/1) ... [2023-09-01 03:29:55,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10259bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:29:55, skipping insertion in model container [2023-09-01 03:29:55,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:29:55" (1/1) ... [2023-09-01 03:29:55,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:29:55,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:29:56,214 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2023-09-01 03:29:56,225 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:29:56,238 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 03:29:56,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@470152b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:29:56, skipping insertion in model container [2023-09-01 03:29:56,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:29:56,241 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:29:56,243 INFO L158 Benchmark]: Toolchain (without parser) took 276.42ms. Allocated memory is still 81.8MB. Free memory was 61.5MB in the beginning and 51.5MB in the end (delta: 10.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-09-01 03:29:56,244 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 65.0MB. Free memory was 43.0MB in the beginning and 43.0MB in the end (delta: 58.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:29:56,245 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.39ms. Allocated memory is still 81.8MB. Free memory was 61.2MB in the beginning and 51.5MB in the end (delta: 9.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-09-01 03:29:56,247 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 65.0MB. Free memory was 43.0MB in the beginning and 43.0MB in the end (delta: 58.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 274.39ms. Allocated memory is still 81.8MB. Free memory was 61.2MB in the beginning and 51.5MB in the end (delta: 9.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 144]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:29:58,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:29:58,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:29:58,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:29:58,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:29:58,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:29:58,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:29:58,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:29:58,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:29:58,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:29:58,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:29:58,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:29:58,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:29:58,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:29:58,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:29:58,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:29:58,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:29:58,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:29:58,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:29:58,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:29:58,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:29:58,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:29:58,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:29:58,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:29:58,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:29:58,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:29:58,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:29:58,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:29:58,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:29:58,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:29:58,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:29:58,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:29:58,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:29:58,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:29:58,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:29:58,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:29:58,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:29:58,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:29:58,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:29:58,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:29:58,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:29:58,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:29:58,163 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:29:58,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:29:58,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:29:58,165 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:29:58,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:29:58,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:29:58,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:29:58,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:29:58,167 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:29:58,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:29:58,168 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:29:58,169 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:29:58,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:29:58,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:29:58,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:29:58,169 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:29:58,170 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:29:58,170 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:29:58,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:29:58,170 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:29:58,170 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:29:58,171 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:29:58,171 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:29:58,171 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:29:58,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:29:58,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:29:58,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:29:58,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:29:58,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:29:58,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:29:58,172 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:29:58,173 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:29:58,173 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:29:58,173 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:29:58,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:29:58,174 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:29:58,174 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:29:58,174 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:29:58,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:29:58,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:29:58,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:29:58,512 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:29:58,512 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:29:58,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-09-01 03:29:59,781 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:29:59,959 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:29:59,959 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-09-01 03:29:59,966 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1b43cf2/0f18a8a1fafa489fb0282db831d302c9/FLAGecdd6e9ee [2023-09-01 03:29:59,977 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1b43cf2/0f18a8a1fafa489fb0282db831d302c9 [2023-09-01 03:29:59,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:29:59,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:29:59,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:29:59,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:29:59,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:29:59,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:29:59" (1/1) ... [2023-09-01 03:29:59,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b2a725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:29:59, skipping insertion in model container [2023-09-01 03:29:59,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:29:59" (1/1) ... [2023-09-01 03:29:59,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:30:00,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:30:00,208 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2023-09-01 03:30:00,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:30:00,243 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:30:00,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:30:00,264 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2023-09-01 03:30:00,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:30:00,278 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:30:00,310 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2023-09-01 03:30:00,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:30:00,333 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:30:00,337 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:30:00,343 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:30:00,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00 WrapperNode [2023-09-01 03:30:00,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:30:00,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:30:00,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:30:00,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:30:00,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (1/1) ... [2023-09-01 03:30:00,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (1/1) ... [2023-09-01 03:30:00,417 INFO L138 Inliner]: procedures = 28, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 258 [2023-09-01 03:30:00,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:30:00,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:30:00,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:30:00,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:30:00,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (1/1) ... [2023-09-01 03:30:00,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (1/1) ... [2023-09-01 03:30:00,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (1/1) ... [2023-09-01 03:30:00,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (1/1) ... [2023-09-01 03:30:00,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (1/1) ... [2023-09-01 03:30:00,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (1/1) ... [2023-09-01 03:30:00,477 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (1/1) ... [2023-09-01 03:30:00,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (1/1) ... [2023-09-01 03:30:00,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:30:00,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:30:00,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:30:00,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:30:00,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (1/1) ... [2023-09-01 03:30:00,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:30:00,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:30:00,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:30:00,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:30:00,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:30:00,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:30:00,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:30:00,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:30:00,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:30:00,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:30:00,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:30:00,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:30:00,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:30:00,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:30:00,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:30:00,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:30:00,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:30:00,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:30:00,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:30:00,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:30:00,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:30:00,564 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:30:00,715 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:30:00,717 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:30:01,392 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:30:01,575 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:30:01,575 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 03:30:01,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:30:01 BoogieIcfgContainer [2023-09-01 03:30:01,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:30:01,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:30:01,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:30:01,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:30:01,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:29:59" (1/3) ... [2023-09-01 03:30:01,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff8b19c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:30:01, skipping insertion in model container [2023-09-01 03:30:01,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:00" (2/3) ... [2023-09-01 03:30:01,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff8b19c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:30:01, skipping insertion in model container [2023-09-01 03:30:01,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:30:01" (3/3) ... [2023-09-01 03:30:01,587 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-09-01 03:30:01,602 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:30:01,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-09-01 03:30:01,602 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:30:01,700 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 03:30:01,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 237 transitions, 498 flow [2023-09-01 03:30:01,841 INFO L130 PetriNetUnfolder]: 18/234 cut-off events. [2023-09-01 03:30:01,841 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:30:01,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 234 events. 18/234 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 253 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 185. Up to 3 conditions per place. [2023-09-01 03:30:01,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 237 transitions, 498 flow [2023-09-01 03:30:01,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 230 transitions, 478 flow [2023-09-01 03:30:01,863 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:30:01,874 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 230 transitions, 478 flow [2023-09-01 03:30:01,877 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 230 transitions, 478 flow [2023-09-01 03:30:01,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 230 transitions, 478 flow [2023-09-01 03:30:01,928 INFO L130 PetriNetUnfolder]: 18/230 cut-off events. [2023-09-01 03:30:01,928 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:30:01,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 230 events. 18/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 251 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 185. Up to 3 conditions per place. [2023-09-01 03:30:01,933 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276 [2023-09-01 03:30:27,383 INFO L134 LiptonReduction]: Checked pairs total: 4901 [2023-09-01 03:30:27,384 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-09-01 03:30:27,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:30:27,402 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;@23204802, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:30:27,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-09-01 03:30:27,405 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:30:27,405 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:30:27,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:30:27,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:30:27,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:30:27,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:30:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash 34096, now seen corresponding path program 1 times [2023-09-01 03:30:27,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:30:27,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986502762] [2023-09-01 03:30:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:30:27,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:27,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:30:27,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:30:27,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 03:30:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:30:27,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:30:27,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:30:27,676 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:30:27,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:30:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:27,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:30:27,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:30:27,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986502762] [2023-09-01 03:30:27,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986502762] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:30:27,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:30:27,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:30:27,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576292987] [2023-09-01 03:30:27,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:30:27,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:30:27,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:30:27,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:30:27,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:30:27,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 483 [2023-09-01 03:30:27,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:27,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:30:27,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 483 [2023-09-01 03:30:27,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:30:29,011 INFO L130 PetriNetUnfolder]: 4871/6432 cut-off events. [2023-09-01 03:30:29,012 INFO L131 PetriNetUnfolder]: For 153/153 co-relation queries the response was YES. [2023-09-01 03:30:29,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13042 conditions, 6432 events. 4871/6432 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 30330 event pairs, 3250 based on Foata normal form. 0/1974 useless extension candidates. Maximal degree in co-relation 11925. Up to 6431 conditions per place. [2023-09-01 03:30:29,069 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 49 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 03:30:29,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 220 flow [2023-09-01 03:30:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:30:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:30:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-09-01 03:30:29,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432712215320911 [2023-09-01 03:30:29,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-09-01 03:30:29,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-09-01 03:30:29,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:30:29,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-09-01 03:30:29,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:29,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:29,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:29,106 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 627 transitions. [2023-09-01 03:30:29,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 220 flow [2023-09-01 03:30:29,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 208 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 03:30:29,118 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 110 flow [2023-09-01 03:30:29,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-09-01 03:30:29,123 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-09-01 03:30:29,124 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 110 flow [2023-09-01 03:30:29,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:29,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:30:29,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:30:29,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:30:29,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:29,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:30:29,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:30:29,335 INFO L85 PathProgramCache]: Analyzing trace with hash 34095, now seen corresponding path program 1 times [2023-09-01 03:30:29,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:30:29,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808812876] [2023-09-01 03:30:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:30:29,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:29,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:30:29,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:30:29,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 03:30:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:30:29,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:30:29,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:30:29,547 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:30:29,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:30:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:29,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:30:29,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:30:29,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808812876] [2023-09-01 03:30:29,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808812876] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:30:29,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:30:29,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:30:29,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331172959] [2023-09-01 03:30:29,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:30:29,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:30:29,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:30:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:30:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:30:29,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 483 [2023-09-01 03:30:29,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:29,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:30:29,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 483 [2023-09-01 03:30:29,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:30:31,601 INFO L130 PetriNetUnfolder]: 9741/12861 cut-off events. [2023-09-01 03:30:31,601 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2023-09-01 03:30:31,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25852 conditions, 12861 events. 9741/12861 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 68067 event pairs, 6500 based on Foata normal form. 0/3950 useless extension candidates. Maximal degree in co-relation 25846. Up to 6432 conditions per place. [2023-09-01 03:30:31,690 INFO L137 encePairwiseOnDemand]: 477/483 looper letters, 93 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2023-09-01 03:30:31,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 98 transitions, 404 flow [2023-09-01 03:30:31,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:30:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:30:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-09-01 03:30:31,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2023-09-01 03:30:31,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-09-01 03:30:31,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-09-01 03:30:31,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:30:31,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-09-01 03:30:31,698 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) [2023-09-01 03:30:31,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:31,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:31,704 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 110 flow. Second operand 3 states and 672 transitions. [2023-09-01 03:30:31,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 98 transitions, 404 flow [2023-09-01 03:30:31,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 98 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:30:31,707 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 141 flow [2023-09-01 03:30:31,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-09-01 03:30:31,709 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-09-01 03:30:31,709 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 141 flow [2023-09-01 03:30:31,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:31,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:30:31,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:30:31,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:30:31,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:31,926 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:30:31,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:30:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1061569, now seen corresponding path program 1 times [2023-09-01 03:30:31,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:30:31,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931490910] [2023-09-01 03:30:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:30:31,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:31,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:30:31,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:30:31,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 03:30:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:30:32,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:30:32,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:30:32,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:30:32,113 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 03:30:32,113 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 [2023-09-01 03:30:32,214 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:30:32,215 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 [2023-09-01 03:30:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:32,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:30:32,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:30:32,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931490910] [2023-09-01 03:30:32,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931490910] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:30:32,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:30:32,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:30:32,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46172560] [2023-09-01 03:30:32,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:30:32,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:30:32,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:30:32,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:30:32,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:30:32,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 483 [2023-09-01 03:30:32,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:32,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:30:32,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 483 [2023-09-01 03:30:32,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:30:33,694 INFO L130 PetriNetUnfolder]: 7661/10219 cut-off events. [2023-09-01 03:30:33,694 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2023-09-01 03:30:33,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20582 conditions, 10219 events. 7661/10219 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 53621 event pairs, 5082 based on Foata normal form. 0/3357 useless extension candidates. Maximal degree in co-relation 20573. Up to 10217 conditions per place. [2023-09-01 03:30:33,742 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 50 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-09-01 03:30:33,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 239 flow [2023-09-01 03:30:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:30:33,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:30:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-09-01 03:30:33,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361628709454796 [2023-09-01 03:30:33,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-09-01 03:30:33,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-09-01 03:30:33,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:30:33,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-09-01 03:30:33,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:33,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:33,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:33,752 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 141 flow. Second operand 3 states and 632 transitions. [2023-09-01 03:30:33,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 239 flow [2023-09-01 03:30:33,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:30:33,754 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 131 flow [2023-09-01 03:30:33,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-09-01 03:30:33,755 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2023-09-01 03:30:33,755 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 131 flow [2023-09-01 03:30:33,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:33,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:30:33,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:30:33,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:30:33,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:33,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:30:33,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:30:33,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1061568, now seen corresponding path program 1 times [2023-09-01 03:30:33,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:30:33,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525448930] [2023-09-01 03:30:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:30:33,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:33,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:30:33,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:30:33,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:30:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:30:34,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:30:34,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:30:34,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:30:34,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:30:34,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:30:34,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:30:34,158 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 03:30:34,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 03:30:34,183 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:30:34,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 03:30:34,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:30:34,254 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 [2023-09-01 03:30:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:34,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:30:34,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:30:34,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525448930] [2023-09-01 03:30:34,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525448930] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:30:34,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:30:34,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:30:34,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651341759] [2023-09-01 03:30:34,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:30:34,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:30:34,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:30:34,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:30:34,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:30:34,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 483 [2023-09-01 03:30:34,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 195.75) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:34,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:30:34,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 483 [2023-09-01 03:30:34,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:30:35,425 INFO L130 PetriNetUnfolder]: 5581/7577 cut-off events. [2023-09-01 03:30:35,425 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2023-09-01 03:30:35,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15295 conditions, 7577 events. 5581/7577 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 39182 event pairs, 3664 based on Foata normal form. 0/2761 useless extension candidates. Maximal degree in co-relation 15286. Up to 7575 conditions per place. [2023-09-01 03:30:35,456 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 48 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-09-01 03:30:35,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 225 flow [2023-09-01 03:30:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:30:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:30:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-09-01 03:30:35,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43685300207039335 [2023-09-01 03:30:35,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-09-01 03:30:35,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-09-01 03:30:35,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:30:35,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-09-01 03:30:35,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:35,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:35,466 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:35,466 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 131 flow. Second operand 3 states and 633 transitions. [2023-09-01 03:30:35,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 225 flow [2023-09-01 03:30:35,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:30:35,468 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 128 flow [2023-09-01 03:30:35,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-09-01 03:30:35,469 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-09-01 03:30:35,469 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 128 flow [2023-09-01 03:30:35,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.75) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:35,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:30:35,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:30:35,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:30:35,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:35,680 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:30:35,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:30:35,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1060443, now seen corresponding path program 1 times [2023-09-01 03:30:35,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:30:35,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434747335] [2023-09-01 03:30:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:30:35,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:35,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:30:35,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:30:35,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 03:30:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:30:35,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:30:35,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:30:35,849 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:30:35,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:30:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:35,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:30:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:36,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:30:36,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434747335] [2023-09-01 03:30:36,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434747335] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:30:36,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:30:36,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:30:36,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339094094] [2023-09-01 03:30:36,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:30:36,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:30:36,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:30:36,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:30:36,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:30:36,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 483 [2023-09-01 03:30:36,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:36,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:30:36,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 483 [2023-09-01 03:30:36,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:30:39,131 INFO L130 PetriNetUnfolder]: 8375/11372 cut-off events. [2023-09-01 03:30:39,132 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2023-09-01 03:30:39,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22958 conditions, 11372 events. 8375/11372 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 61929 event pairs, 5496 based on Foata normal form. 0/4153 useless extension candidates. Maximal degree in co-relation 22948. Up to 3789 conditions per place. [2023-09-01 03:30:39,174 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 125 selfloop transitions, 15 changer transitions 0/141 dead transitions. [2023-09-01 03:30:39,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 141 transitions, 620 flow [2023-09-01 03:30:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:30:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:30:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1232 transitions. [2023-09-01 03:30:39,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2023-09-01 03:30:39,179 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1232 transitions. [2023-09-01 03:30:39,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1232 transitions. [2023-09-01 03:30:39,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:30:39,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1232 transitions. [2023-09-01 03:30:39,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 205.33333333333334) internal successors, (1232), 6 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:39,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:39,188 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:39,188 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 128 flow. Second operand 6 states and 1232 transitions. [2023-09-01 03:30:39,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 141 transitions, 620 flow [2023-09-01 03:30:39,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 141 transitions, 619 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:30:39,191 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 240 flow [2023-09-01 03:30:39,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-09-01 03:30:39,192 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-09-01 03:30:39,192 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 240 flow [2023-09-01 03:30:39,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:39,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:30:39,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:30:39,213 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 (6)] Ended with exit code 0 [2023-09-01 03:30:39,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:39,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:30:39,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:30:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1020194256, now seen corresponding path program 1 times [2023-09-01 03:30:39,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:30:39,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691426087] [2023-09-01 03:30:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:30:39,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:39,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:30:39,404 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:30:39,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:30:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:30:39,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:30:39,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:30:39,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:30:39,571 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 03:30:39,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-09-01 03:30:39,854 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 03:30:39,854 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 [2023-09-01 03:30:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:39,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:30:39,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:30:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691426087] [2023-09-01 03:30:39,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691426087] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:30:39,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:30:39,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:30:39,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749443569] [2023-09-01 03:30:39,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:30:39,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:30:39,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:30:39,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:30:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:30:40,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 483 [2023-09-01 03:30:40,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:40,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:30:40,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 483 [2023-09-01 03:30:40,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:30:41,179 INFO L130 PetriNetUnfolder]: 8102/10958 cut-off events. [2023-09-01 03:30:41,179 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-09-01 03:30:41,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22175 conditions, 10958 events. 8102/10958 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 59965 event pairs, 5280 based on Foata normal form. 0/4057 useless extension candidates. Maximal degree in co-relation 22160. Up to 10955 conditions per place. [2023-09-01 03:30:41,224 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 57 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-09-01 03:30:41,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 352 flow [2023-09-01 03:30:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:30:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:30:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-09-01 03:30:41,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334023464458247 [2023-09-01 03:30:41,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-09-01 03:30:41,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-09-01 03:30:41,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:30:41,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-09-01 03:30:41,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:41,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:41,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:41,232 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 240 flow. Second operand 3 states and 628 transitions. [2023-09-01 03:30:41,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 352 flow [2023-09-01 03:30:41,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 333 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 03:30:41,235 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 219 flow [2023-09-01 03:30:41,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-09-01 03:30:41,235 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-09-01 03:30:41,236 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 219 flow [2023-09-01 03:30:41,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:41,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:30:41,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:30:41,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:30:41,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:41,446 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:30:41,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:30:41,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1020194258, now seen corresponding path program 1 times [2023-09-01 03:30:41,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:30:41,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739585859] [2023-09-01 03:30:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:30:41,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:41,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:30:41,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:30:41,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 03:30:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:30:41,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:30:41,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:30:41,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:30:41,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:30:41,609 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 03:30:41,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-09-01 03:30:41,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-09-01 03:30:41,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:30:41,684 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 [2023-09-01 03:30:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:41,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:30:41,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:30:41,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739585859] [2023-09-01 03:30:41,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739585859] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:30:41,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:30:41,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:30:41,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248111306] [2023-09-01 03:30:41,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:30:41,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:30:41,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:30:41,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:30:41,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:30:41,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 483 [2023-09-01 03:30:41,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:41,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:30:41,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 483 [2023-09-01 03:30:41,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:30:42,782 INFO L130 PetriNetUnfolder]: 7829/10544 cut-off events. [2023-09-01 03:30:42,782 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2023-09-01 03:30:42,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21338 conditions, 10544 events. 7829/10544 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 57459 event pairs, 5064 based on Foata normal form. 0/3961 useless extension candidates. Maximal degree in co-relation 21322. Up to 10541 conditions per place. [2023-09-01 03:30:42,814 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 55 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-09-01 03:30:42,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 327 flow [2023-09-01 03:30:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:30:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:30:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-09-01 03:30:42,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43409247757073843 [2023-09-01 03:30:42,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-09-01 03:30:42,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-09-01 03:30:42,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:30:42,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-09-01 03:30:42,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:42,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:42,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:42,820 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 219 flow. Second operand 3 states and 629 transitions. [2023-09-01 03:30:42,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 327 flow [2023-09-01 03:30:42,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:30:42,822 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 216 flow [2023-09-01 03:30:42,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-09-01 03:30:42,823 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-09-01 03:30:42,823 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 216 flow [2023-09-01 03:30:42,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:42,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:30:42,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:30:42,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:30:43,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:43,036 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:30:43,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:30:43,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1561243861, now seen corresponding path program 1 times [2023-09-01 03:30:43,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:30:43,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012586415] [2023-09-01 03:30:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:30:43,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:30:43,038 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:30:43,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 03:30:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:30:43,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:30:43,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:30:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:43,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:30:43,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:30:43,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012586415] [2023-09-01 03:30:43,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012586415] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:30:43,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:30:43,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:30:43,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642032270] [2023-09-01 03:30:43,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:30:43,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:30:43,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:30:43,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:30:43,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:30:43,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-09-01 03:30:43,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:43,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:30:43,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-09-01 03:30:43,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:30:44,335 INFO L130 PetriNetUnfolder]: 7906/10723 cut-off events. [2023-09-01 03:30:44,336 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-09-01 03:30:44,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21730 conditions, 10723 events. 7906/10723 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 58458 event pairs, 5127 based on Foata normal form. 129/4224 useless extension candidates. Maximal degree in co-relation 21713. Up to 10540 conditions per place. [2023-09-01 03:30:44,388 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 75 selfloop transitions, 3 changer transitions 1/80 dead transitions. [2023-09-01 03:30:44,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 463 flow [2023-09-01 03:30:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:30:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:30:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 840 transitions. [2023-09-01 03:30:44,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2023-09-01 03:30:44,391 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 840 transitions. [2023-09-01 03:30:44,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 840 transitions. [2023-09-01 03:30:44,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:30:44,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 840 transitions. [2023-09-01 03:30:44,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:44,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:44,397 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:44,397 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 216 flow. Second operand 4 states and 840 transitions. [2023-09-01 03:30:44,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 463 flow [2023-09-01 03:30:44,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 462 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:30:44,400 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 244 flow [2023-09-01 03:30:44,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-09-01 03:30:44,401 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-09-01 03:30:44,401 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 244 flow [2023-09-01 03:30:44,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:44,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:30:44,402 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:30:44,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:30:44,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:44,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:30:44,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:30:44,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1530359855, now seen corresponding path program 2 times [2023-09-01 03:30:44,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:30:44,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685040082] [2023-09-01 03:30:44,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:30:44,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:30:44,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:30:44,614 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:30:44,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:30:44,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:30:44,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:30:44,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:30:44,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:30:44,809 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:30:44,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:30:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:44,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:30:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:30:45,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:30:45,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685040082] [2023-09-01 03:30:45,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685040082] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:30:45,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:30:45,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:30:45,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025005448] [2023-09-01 03:30:45,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:30:45,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:30:45,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:30:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:30:45,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:30:48,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 483 [2023-09-01 03:30:48,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 244 flow. Second operand has 12 states, 12 states have (on average 184.0) internal successors, (2208), 12 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:30:48,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:30:48,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 483 [2023-09-01 03:30:48,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:30:50,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:30:51,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:30:53,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:30:55,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:30:57,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:30:59,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:31:05,237 INFO L130 PetriNetUnfolder]: 26334/35700 cut-off events. [2023-09-01 03:31:05,237 INFO L131 PetriNetUnfolder]: For 2809/2809 co-relation queries the response was YES. [2023-09-01 03:31:05,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91242 conditions, 35700 events. 26334/35700 cut-off events. For 2809/2809 co-relation queries the response was YES. Maximal size of possible extension queue 1800. Compared 218486 event pairs, 17090 based on Foata normal form. 18/13620 useless extension candidates. Maximal degree in co-relation 91223. Up to 19021 conditions per place. [2023-09-01 03:31:05,492 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 365 selfloop transitions, 32 changer transitions 0/398 dead transitions. [2023-09-01 03:31:05,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 398 transitions, 2076 flow [2023-09-01 03:31:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:31:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:31:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2605 transitions. [2023-09-01 03:31:05,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449447895100069 [2023-09-01 03:31:05,501 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2605 transitions. [2023-09-01 03:31:05,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2605 transitions. [2023-09-01 03:31:05,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:05,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2605 transitions. [2023-09-01 03:31:05,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 217.08333333333334) internal successors, (2605), 12 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:05,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:05,516 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:05,516 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 244 flow. Second operand 12 states and 2605 transitions. [2023-09-01 03:31:05,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 398 transitions, 2076 flow [2023-09-01 03:31:05,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 398 transitions, 2070 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 03:31:05,525 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 482 flow [2023-09-01 03:31:05,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=482, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2023-09-01 03:31:05,527 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 19 predicate places. [2023-09-01 03:31:05,527 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 482 flow [2023-09-01 03:31:05,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 184.0) internal successors, (2208), 12 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:05,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:05,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:31:05,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 03:31:05,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:31:05,741 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:31:05,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1154162911, now seen corresponding path program 1 times [2023-09-01 03:31:05,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:05,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750369377] [2023-09-01 03:31:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:05,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:31:05,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:05,743 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:31:05,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:31:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:05,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:31:05,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:05,897 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 03:31:05,897 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 [2023-09-01 03:31:05,923 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:31:05,924 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 [2023-09-01 03:31:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:05,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:05,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:05,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750369377] [2023-09-01 03:31:05,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750369377] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:05,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:05,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:31:05,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975119950] [2023-09-01 03:31:05,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:05,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:31:05,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:31:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:31:06,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-09-01 03:31:06,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:06,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:06,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-09-01 03:31:06,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:08,899 INFO L130 PetriNetUnfolder]: 24754/33490 cut-off events. [2023-09-01 03:31:08,899 INFO L131 PetriNetUnfolder]: For 3072/3072 co-relation queries the response was YES. [2023-09-01 03:31:09,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85619 conditions, 33490 events. 24754/33490 cut-off events. For 3072/3072 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 200632 event pairs, 16070 based on Foata normal form. 0/13199 useless extension candidates. Maximal degree in co-relation 85592. Up to 33470 conditions per place. [2023-09-01 03:31:09,110 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 72 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-09-01 03:31:09,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 624 flow [2023-09-01 03:31:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:31:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:31:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 618 transitions. [2023-09-01 03:31:09,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42650103519668736 [2023-09-01 03:31:09,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 618 transitions. [2023-09-01 03:31:09,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 618 transitions. [2023-09-01 03:31:09,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:09,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 618 transitions. [2023-09-01 03:31:09,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:09,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:09,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:09,116 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 482 flow. Second operand 3 states and 618 transitions. [2023-09-01 03:31:09,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 624 flow [2023-09-01 03:31:09,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 565 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-09-01 03:31:09,121 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 421 flow [2023-09-01 03:31:09,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-09-01 03:31:09,122 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 15 predicate places. [2023-09-01 03:31:09,122 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 421 flow [2023-09-01 03:31:09,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:09,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:09,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:31:09,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:31:09,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:31:09,333 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:31:09,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:09,333 INFO L85 PathProgramCache]: Analyzing trace with hash 227402752, now seen corresponding path program 1 times [2023-09-01 03:31:09,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:09,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074305610] [2023-09-01 03:31:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:09,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:31:09,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:09,334 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:31:09,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 03:31:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:31:09,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:09,497 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:31:09,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:31:09,520 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:31:09,520 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 [2023-09-01 03:31:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:31:09,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:09,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:09,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074305610] [2023-09-01 03:31:09,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074305610] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:09,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:09,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:31:09,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890851667] [2023-09-01 03:31:09,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:09,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:31:09,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:31:09,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:31:09,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-09-01 03:31:09,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 421 flow. Second operand has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:09,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:09,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-09-01 03:31:09,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:12,001 INFO L130 PetriNetUnfolder]: 15514/21380 cut-off events. [2023-09-01 03:31:12,001 INFO L131 PetriNetUnfolder]: For 2631/2631 co-relation queries the response was YES. [2023-09-01 03:31:12,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53804 conditions, 21380 events. 15514/21380 cut-off events. For 2631/2631 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 124009 event pairs, 10150 based on Foata normal form. 0/9670 useless extension candidates. Maximal degree in co-relation 53776. Up to 21347 conditions per place. [2023-09-01 03:31:12,140 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 58 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2023-09-01 03:31:12,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 549 flow [2023-09-01 03:31:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:31:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:31:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 796 transitions. [2023-09-01 03:31:12,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41200828157349895 [2023-09-01 03:31:12,143 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 796 transitions. [2023-09-01 03:31:12,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 796 transitions. [2023-09-01 03:31:12,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:12,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 796 transitions. [2023-09-01 03:31:12,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:12,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:12,148 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:12,148 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 421 flow. Second operand 4 states and 796 transitions. [2023-09-01 03:31:12,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 549 flow [2023-09-01 03:31:12,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:31:12,153 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 432 flow [2023-09-01 03:31:12,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=432, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-09-01 03:31:12,154 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2023-09-01 03:31:12,154 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 432 flow [2023-09-01 03:31:12,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:12,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:12,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:31:12,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 03:31:12,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:31:12,364 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:31:12,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:12,365 INFO L85 PathProgramCache]: Analyzing trace with hash 227402753, now seen corresponding path program 1 times [2023-09-01 03:31:12,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:12,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207551890] [2023-09-01 03:31:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:12,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:31:12,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:12,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:31:12,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 03:31:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:31:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:12,553 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:31:12,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:31:12,641 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:31:12,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:31:12,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:12,742 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 [2023-09-01 03:31:12,756 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:31:12,756 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 [2023-09-01 03:31:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:12,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:31:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:15,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:15,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207551890] [2023-09-01 03:31:15,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207551890] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:31:15,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:31:15,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:31:15,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873052276] [2023-09-01 03:31:15,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:31:15,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:31:15,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:15,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:31:15,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:31:18,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:31:21,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 483 [2023-09-01 03:31:21,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 432 flow. Second operand has 8 states, 8 states have (on average 173.5) internal successors, (1388), 8 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:21,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:21,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 483 [2023-09-01 03:31:21,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:29,727 WARN L222 SmtUtils]: Spent 8.51s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:31:31,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:31:40,219 WARN L222 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:31:59,134 INFO L130 PetriNetUnfolder]: 31076/43326 cut-off events. [2023-09-01 03:31:59,135 INFO L131 PetriNetUnfolder]: For 6732/6732 co-relation queries the response was YES. [2023-09-01 03:31:59,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107550 conditions, 43326 events. 31076/43326 cut-off events. For 6732/6732 co-relation queries the response was YES. Maximal size of possible extension queue 1751. Compared 279736 event pairs, 20530 based on Foata normal form. 0/21986 useless extension candidates. Maximal degree in co-relation 107521. Up to 20781 conditions per place. [2023-09-01 03:31:59,418 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 170 selfloop transitions, 29 changer transitions 1/201 dead transitions. [2023-09-01 03:31:59,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 201 transitions, 1353 flow [2023-09-01 03:31:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 03:31:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 03:31:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2740 transitions. [2023-09-01 03:31:59,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378191856452726 [2023-09-01 03:31:59,425 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2740 transitions. [2023-09-01 03:31:59,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2740 transitions. [2023-09-01 03:31:59,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:59,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2740 transitions. [2023-09-01 03:31:59,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 182.66666666666666) internal successors, (2740), 15 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:59,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:59,437 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:59,437 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 432 flow. Second operand 15 states and 2740 transitions. [2023-09-01 03:31:59,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 201 transitions, 1353 flow [2023-09-01 03:31:59,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 201 transitions, 1340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:31:59,444 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 656 flow [2023-09-01 03:31:59,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=656, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2023-09-01 03:31:59,445 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2023-09-01 03:31:59,445 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 656 flow [2023-09-01 03:31:59,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.5) internal successors, (1388), 8 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:31:59,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:59,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:31:59,458 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 [2023-09-01 03:31:59,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:31:59,656 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:31:59,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:59,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1154162912, now seen corresponding path program 1 times [2023-09-01 03:31:59,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:59,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552894266] [2023-09-01 03:31:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:59,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:31:59,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:59,657 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:31:59,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 03:31:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:59,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:31:59,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:59,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:59,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:59,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:59,862 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 03:31:59,862 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 [2023-09-01 03:31:59,875 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 18 treesize of output 16 [2023-09-01 03:31:59,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:59,927 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 [2023-09-01 03:32:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:32:00,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:32:00,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:00,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552894266] [2023-09-01 03:32:00,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552894266] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:32:00,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:32:00,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:32:00,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531607726] [2023-09-01 03:32:00,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:32:00,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:32:00,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:00,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:32:00,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:32:00,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 483 [2023-09-01 03:32:00,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 656 flow. Second operand has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:00,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:32:00,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 483 [2023-09-01 03:32:00,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:05,095 INFO L130 PetriNetUnfolder]: 29166/40536 cut-off events. [2023-09-01 03:32:05,095 INFO L131 PetriNetUnfolder]: For 25651/25651 co-relation queries the response was YES. [2023-09-01 03:32:05,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112986 conditions, 40536 events. 29166/40536 cut-off events. For 25651/25651 co-relation queries the response was YES. Maximal size of possible extension queue 1772. Compared 258213 event pairs, 19280 based on Foata normal form. 0/23576 useless extension candidates. Maximal degree in co-relation 112952. Up to 40496 conditions per place. [2023-09-01 03:32:05,417 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 83 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-09-01 03:32:05,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 85 transitions, 820 flow [2023-09-01 03:32:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:32:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:32:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-09-01 03:32:05,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2023-09-01 03:32:05,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-09-01 03:32:05,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-09-01 03:32:05,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:32:05,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-09-01 03:32:05,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:05,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:05,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:05,422 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 656 flow. Second operand 3 states and 616 transitions. [2023-09-01 03:32:05,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 85 transitions, 820 flow [2023-09-01 03:32:05,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 801 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-09-01 03:32:05,479 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 635 flow [2023-09-01 03:32:05,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=635, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2023-09-01 03:32:05,480 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-09-01 03:32:05,480 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 635 flow [2023-09-01 03:32:05,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:05,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:32:05,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:32:05,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-09-01 03:32:05,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:05,696 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:32:05,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:32:05,697 INFO L85 PathProgramCache]: Analyzing trace with hash -501743347, now seen corresponding path program 1 times [2023-09-01 03:32:05,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:32:05,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108521582] [2023-09-01 03:32:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:32:05,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:05,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:32:05,698 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:32:05,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 03:32:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:32:05,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 03:32:05,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:32:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:32:05,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:32:05,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:05,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108521582] [2023-09-01 03:32:05,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108521582] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:32:05,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:32:05,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:32:05,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262118422] [2023-09-01 03:32:05,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:32:05,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:32:05,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:05,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:32:05,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:32:05,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 483 [2023-09-01 03:32:05,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 635 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:05,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:32:05,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 483 [2023-09-01 03:32:05,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:09,436 INFO L130 PetriNetUnfolder]: 22796/33156 cut-off events. [2023-09-01 03:32:09,436 INFO L131 PetriNetUnfolder]: For 15720/15720 co-relation queries the response was YES. [2023-09-01 03:32:09,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88809 conditions, 33156 events. 22796/33156 cut-off events. For 15720/15720 co-relation queries the response was YES. Maximal size of possible extension queue 1171. Compared 208037 event pairs, 4140 based on Foata normal form. 960/20896 useless extension candidates. Maximal degree in co-relation 88774. Up to 29561 conditions per place. [2023-09-01 03:32:09,720 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 96 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2023-09-01 03:32:09,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 100 transitions, 885 flow [2023-09-01 03:32:09,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:32:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:32:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-09-01 03:32:09,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4472049689440994 [2023-09-01 03:32:09,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-09-01 03:32:09,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-09-01 03:32:09,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:32:09,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-09-01 03:32:09,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:09,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:09,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:09,725 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 635 flow. Second operand 3 states and 648 transitions. [2023-09-01 03:32:09,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 100 transitions, 885 flow [2023-09-01 03:32:09,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 100 transitions, 884 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:32:09,753 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 663 flow [2023-09-01 03:32:09,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=663, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2023-09-01 03:32:09,754 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 32 predicate places. [2023-09-01 03:32:09,754 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 663 flow [2023-09-01 03:32:09,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:09,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:32:09,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:32:09,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:32:09,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:09,964 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:32:09,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:32:09,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1840133057, now seen corresponding path program 1 times [2023-09-01 03:32:09,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:32:09,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557131604] [2023-09-01 03:32:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:32:09,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:09,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:32:09,966 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:32:09,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:32:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:32:10,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:32:10,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:32:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:32:10,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:32:10,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:10,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557131604] [2023-09-01 03:32:10,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557131604] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:32:10,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:32:10,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:32:10,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345712249] [2023-09-01 03:32:10,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:32:10,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:32:10,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:10,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:32:10,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:32:10,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 483 [2023-09-01 03:32:10,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 663 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:10,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:32:10,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 483 [2023-09-01 03:32:10,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:14,668 INFO L130 PetriNetUnfolder]: 24796/36456 cut-off events. [2023-09-01 03:32:14,668 INFO L131 PetriNetUnfolder]: For 30610/30610 co-relation queries the response was YES. [2023-09-01 03:32:14,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114131 conditions, 36456 events. 24796/36456 cut-off events. For 30610/30610 co-relation queries the response was YES. Maximal size of possible extension queue 1116. Compared 235615 event pairs, 7740 based on Foata normal form. 1440/23896 useless extension candidates. Maximal degree in co-relation 114094. Up to 24701 conditions per place. [2023-09-01 03:32:14,943 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 98 selfloop transitions, 3 changer transitions 1/103 dead transitions. [2023-09-01 03:32:14,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 103 transitions, 947 flow [2023-09-01 03:32:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:32:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:32:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-09-01 03:32:14,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478951000690131 [2023-09-01 03:32:14,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-09-01 03:32:14,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-09-01 03:32:14,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:32:14,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-09-01 03:32:14,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:14,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:14,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:14,949 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 663 flow. Second operand 3 states and 649 transitions. [2023-09-01 03:32:14,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 103 transitions, 947 flow [2023-09-01 03:32:14,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 103 transitions, 944 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:32:14,989 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 681 flow [2023-09-01 03:32:14,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=681, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-09-01 03:32:14,990 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2023-09-01 03:32:14,990 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 681 flow [2023-09-01 03:32:14,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:14,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:32:14,991 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 03:32:14,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 03:32:15,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:15,191 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:32:15,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:32:15,192 INFO L85 PathProgramCache]: Analyzing trace with hash 483924949, now seen corresponding path program 2 times [2023-09-01 03:32:15,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:32:15,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030166166] [2023-09-01 03:32:15,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:32:15,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:15,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:32:15,193 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:32:15,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 03:32:15,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:32:15,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:32:15,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:32:15,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:32:15,456 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:32:15,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:32:15,645 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:32:15,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:32:15,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:32:15,798 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 [2023-09-01 03:32:15,815 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:32:15,815 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 [2023-09-01 03:32:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:32:15,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:32:15,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:15,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030166166] [2023-09-01 03:32:15,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030166166] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:32:15,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:32:15,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:32:15,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35024678] [2023-09-01 03:32:15,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:32:15,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:32:15,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:15,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:32:15,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:32:16,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 483 [2023-09-01 03:32:16,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 681 flow. Second operand has 4 states, 4 states have (on average 185.5) internal successors, (742), 4 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:16,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:32:16,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 483 [2023-09-01 03:32:16,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:20,035 INFO L130 PetriNetUnfolder]: 18229/26893 cut-off events. [2023-09-01 03:32:20,035 INFO L131 PetriNetUnfolder]: For 28220/28220 co-relation queries the response was YES. [2023-09-01 03:32:20,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84503 conditions, 26893 events. 18229/26893 cut-off events. For 28220/28220 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 166406 event pairs, 9693 based on Foata normal form. 1550/17853 useless extension candidates. Maximal degree in co-relation 84464. Up to 26841 conditions per place. [2023-09-01 03:32:20,180 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 72 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2023-09-01 03:32:20,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 85 transitions, 817 flow [2023-09-01 03:32:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:32:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:32:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 771 transitions. [2023-09-01 03:32:20,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39906832298136646 [2023-09-01 03:32:20,182 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 771 transitions. [2023-09-01 03:32:20,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 771 transitions. [2023-09-01 03:32:20,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:32:20,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 771 transitions. [2023-09-01 03:32:20,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:20,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:20,185 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:20,186 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 681 flow. Second operand 4 states and 771 transitions. [2023-09-01 03:32:20,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 85 transitions, 817 flow [2023-09-01 03:32:20,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 85 transitions, 797 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 03:32:20,205 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 653 flow [2023-09-01 03:32:20,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=653, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2023-09-01 03:32:20,206 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2023-09-01 03:32:20,206 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 653 flow [2023-09-01 03:32:20,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.5) internal successors, (742), 4 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:20,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:32:20,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:32:20,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 03:32:20,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:20,416 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:32:20,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:32:20,416 INFO L85 PathProgramCache]: Analyzing trace with hash 280488962, now seen corresponding path program 1 times [2023-09-01 03:32:20,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:32:20,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892756900] [2023-09-01 03:32:20,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:32:20,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:20,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:32:20,417 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:32:20,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 03:32:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:32:20,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:32:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:32:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:32:20,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:32:20,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:20,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892756900] [2023-09-01 03:32:20,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892756900] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:32:20,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:32:20,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:32:20,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983209860] [2023-09-01 03:32:20,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:32:20,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:32:20,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:32:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:32:20,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-09-01 03:32:20,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 653 flow. Second operand has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:20,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:32:20,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-09-01 03:32:20,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:24,156 INFO L130 PetriNetUnfolder]: 16753/24775 cut-off events. [2023-09-01 03:32:24,156 INFO L131 PetriNetUnfolder]: For 6039/6039 co-relation queries the response was YES. [2023-09-01 03:32:24,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67736 conditions, 24775 events. 16753/24775 cut-off events. For 6039/6039 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 152959 event pairs, 8949 based on Foata normal form. 48/15190 useless extension candidates. Maximal degree in co-relation 67698. Up to 24186 conditions per place. [2023-09-01 03:32:24,298 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 69 selfloop transitions, 14 changer transitions 18/102 dead transitions. [2023-09-01 03:32:24,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 102 transitions, 919 flow [2023-09-01 03:32:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:32:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:32:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 819 transitions. [2023-09-01 03:32:24,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42391304347826086 [2023-09-01 03:32:24,300 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 819 transitions. [2023-09-01 03:32:24,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 819 transitions. [2023-09-01 03:32:24,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:32:24,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 819 transitions. [2023-09-01 03:32:24,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:24,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:24,304 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:24,304 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 653 flow. Second operand 4 states and 819 transitions. [2023-09-01 03:32:24,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 102 transitions, 919 flow [2023-09-01 03:32:24,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 102 transitions, 906 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:32:24,317 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 690 flow [2023-09-01 03:32:24,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=690, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2023-09-01 03:32:24,318 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2023-09-01 03:32:24,318 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 690 flow [2023-09-01 03:32:24,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:24,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:32:24,319 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:32:24,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:32:24,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:24,525 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:32:24,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:32:24,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1580761263, now seen corresponding path program 3 times [2023-09-01 03:32:24,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:32:24,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863812400] [2023-09-01 03:32:24,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:32:24,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:32:24,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:32:24,527 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:32:24,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 03:32:24,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:32:24,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:32:24,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:32:24,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:32:24,817 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:32:24,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:32:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:32:25,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:32:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:32:28,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:28,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863812400] [2023-09-01 03:32:28,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863812400] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:32:28,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:32:28,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:32:28,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021334539] [2023-09-01 03:32:28,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:32:28,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:32:28,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:28,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:32:28,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:32:48,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 483 [2023-09-01 03:32:48,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 690 flow. Second operand has 24 states, 24 states have (on average 184.0) internal successors, (4416), 24 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:32:48,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:32:48,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 483 [2023-09-01 03:32:48,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:57,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:32:59,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:33:01,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:33:03,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:33:05,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:33:07,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:33:09,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:33:11,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:33:13,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:33:15,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:33:32,983 INFO L130 PetriNetUnfolder]: 23714/35008 cut-off events. [2023-09-01 03:33:32,983 INFO L131 PetriNetUnfolder]: For 14733/14733 co-relation queries the response was YES. [2023-09-01 03:33:33,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100920 conditions, 35008 events. 23714/35008 cut-off events. For 14733/14733 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 221710 event pairs, 12610 based on Foata normal form. 28/23255 useless extension candidates. Maximal degree in co-relation 100881. Up to 14119 conditions per place. [2023-09-01 03:33:33,422 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 423 selfloop transitions, 65 changer transitions 0/489 dead transitions. [2023-09-01 03:33:33,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 489 transitions, 3486 flow [2023-09-01 03:33:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:33:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:33:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4811 transitions. [2023-09-01 03:33:33,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41502760524499654 [2023-09-01 03:33:33,431 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4811 transitions. [2023-09-01 03:33:33,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4811 transitions. [2023-09-01 03:33:33,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:33:33,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4811 transitions. [2023-09-01 03:33:33,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 200.45833333333334) internal successors, (4811), 24 states have internal predecessors, (4811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:33,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 483.0) internal successors, (12075), 25 states have internal predecessors, (12075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:33,454 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 483.0) internal successors, (12075), 25 states have internal predecessors, (12075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:33,454 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 690 flow. Second operand 24 states and 4811 transitions. [2023-09-01 03:33:33,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 489 transitions, 3486 flow [2023-09-01 03:33:33,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 489 transitions, 3325 flow, removed 54 selfloop flow, removed 3 redundant places. [2023-09-01 03:33:33,728 INFO L231 Difference]: Finished difference. Result has 125 places, 115 transitions, 1153 flow [2023-09-01 03:33:33,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1153, PETRI_PLACES=125, PETRI_TRANSITIONS=115} [2023-09-01 03:33:33,729 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 66 predicate places. [2023-09-01 03:33:33,729 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 115 transitions, 1153 flow [2023-09-01 03:33:33,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 184.0) internal successors, (4416), 24 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:33,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:33:33,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:33:33,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 03:33:33,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:33:33,941 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:33:33,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:33:33,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1875985721, now seen corresponding path program 1 times [2023-09-01 03:33:33,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:33:33,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357896911] [2023-09-01 03:33:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:33:33,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:33:33,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:33:33,943 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:33:33,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 03:33:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:33:34,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:33:34,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:33:34,096 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 [2023-09-01 03:33:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:33:34,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:33:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:33:35,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:33:35,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357896911] [2023-09-01 03:33:35,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357896911] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:33:35,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:33:35,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-09-01 03:33:35,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835233175] [2023-09-01 03:33:35,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:33:35,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:33:35,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:33:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:33:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:33:38,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 483 [2023-09-01 03:33:38,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 115 transitions, 1153 flow. Second operand has 8 states, 8 states have (on average 179.5) internal successors, (1436), 8 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:38,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:33:38,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 483 [2023-09-01 03:33:38,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:33:45,483 INFO L130 PetriNetUnfolder]: 22220/32830 cut-off events. [2023-09-01 03:33:45,483 INFO L131 PetriNetUnfolder]: For 8390/8390 co-relation queries the response was YES. [2023-09-01 03:33:45,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89977 conditions, 32830 events. 22220/32830 cut-off events. For 8390/8390 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 206948 event pairs, 11746 based on Foata normal form. 0/20287 useless extension candidates. Maximal degree in co-relation 89926. Up to 26877 conditions per place. [2023-09-01 03:33:45,912 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 127 selfloop transitions, 43 changer transitions 0/171 dead transitions. [2023-09-01 03:33:45,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 171 transitions, 1693 flow [2023-09-01 03:33:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:33:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:33:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1505 transitions. [2023-09-01 03:33:45,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894927536231884 [2023-09-01 03:33:45,916 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1505 transitions. [2023-09-01 03:33:45,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1505 transitions. [2023-09-01 03:33:45,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:33:45,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1505 transitions. [2023-09-01 03:33:45,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 188.125) internal successors, (1505), 8 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:45,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:45,922 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:45,922 INFO L175 Difference]: Start difference. First operand has 125 places, 115 transitions, 1153 flow. Second operand 8 states and 1505 transitions. [2023-09-01 03:33:45,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 171 transitions, 1693 flow [2023-09-01 03:33:45,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 1543 flow, removed 34 selfloop flow, removed 10 redundant places. [2023-09-01 03:33:45,945 INFO L231 Difference]: Finished difference. Result has 124 places, 117 transitions, 1126 flow [2023-09-01 03:33:45,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1126, PETRI_PLACES=124, PETRI_TRANSITIONS=117} [2023-09-01 03:33:45,945 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 65 predicate places. [2023-09-01 03:33:45,945 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 117 transitions, 1126 flow [2023-09-01 03:33:45,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 179.5) internal successors, (1436), 8 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:45,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:33:45,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:33:45,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:33:46,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:33:46,157 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:33:46,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:33:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1875985720, now seen corresponding path program 1 times [2023-09-01 03:33:46,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:33:46,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498318888] [2023-09-01 03:33:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:33:46,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:33:46,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:33:46,159 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:33:46,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 03:33:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:33:46,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:33:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:33:46,454 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 [2023-09-01 03:33:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:33:46,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:33:46,508 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:33:46,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498318888] [2023-09-01 03:33:46,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498318888] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:33:46,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:33:46,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:33:46,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857447050] [2023-09-01 03:33:46,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:33:46,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:33:46,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:33:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:33:46,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:33:46,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-09-01 03:33:46,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 117 transitions, 1126 flow. Second operand has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:46,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:33:46,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-09-01 03:33:46,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:33:50,062 INFO L130 PetriNetUnfolder]: 15998/23752 cut-off events. [2023-09-01 03:33:50,062 INFO L131 PetriNetUnfolder]: For 16121/16121 co-relation queries the response was YES. [2023-09-01 03:33:50,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69211 conditions, 23752 events. 15998/23752 cut-off events. For 16121/16121 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 143906 event pairs, 8182 based on Foata normal form. 0/18169 useless extension candidates. Maximal degree in co-relation 69158. Up to 23588 conditions per place. [2023-09-01 03:33:50,214 INFO L137 encePairwiseOnDemand]: 479/483 looper letters, 95 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2023-09-01 03:33:50,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 115 transitions, 1346 flow [2023-09-01 03:33:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:33:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:33:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 788 transitions. [2023-09-01 03:33:50,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4078674948240166 [2023-09-01 03:33:50,216 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 788 transitions. [2023-09-01 03:33:50,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 788 transitions. [2023-09-01 03:33:50,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:33:50,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 788 transitions. [2023-09-01 03:33:50,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:50,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:50,218 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:50,219 INFO L175 Difference]: Start difference. First operand has 124 places, 117 transitions, 1126 flow. Second operand 4 states and 788 transitions. [2023-09-01 03:33:50,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 115 transitions, 1346 flow [2023-09-01 03:33:50,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 115 transitions, 1213 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-09-01 03:33:50,260 INFO L231 Difference]: Finished difference. Result has 120 places, 115 transitions, 1023 flow [2023-09-01 03:33:50,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1023, PETRI_PLACES=120, PETRI_TRANSITIONS=115} [2023-09-01 03:33:50,260 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 61 predicate places. [2023-09-01 03:33:50,261 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 1023 flow [2023-09-01 03:33:50,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:50,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:33:50,261 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:33:50,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 03:33:50,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:33:50,462 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:33:50,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:33:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1193279038, now seen corresponding path program 2 times [2023-09-01 03:33:50,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:33:50,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8410572] [2023-09-01 03:33:50,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:33:50,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:33:50,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:33:50,469 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:33:50,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 03:33:50,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:33:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:33:50,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:33:50,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:33:50,615 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 [2023-09-01 03:33:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 03:33:50,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:33:50,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:33:50,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8410572] [2023-09-01 03:33:50,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8410572] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:33:50,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:33:50,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:33:50,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891971728] [2023-09-01 03:33:50,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:33:50,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:33:50,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:33:50,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:33:50,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:33:51,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-09-01 03:33:51,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 1023 flow. Second operand has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:51,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:33:51,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-09-01 03:33:51,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:33:53,244 INFO L130 PetriNetUnfolder]: 10952/16344 cut-off events. [2023-09-01 03:33:53,244 INFO L131 PetriNetUnfolder]: For 14491/14491 co-relation queries the response was YES. [2023-09-01 03:33:53,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44734 conditions, 16344 events. 10952/16344 cut-off events. For 14491/14491 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 95152 event pairs, 5448 based on Foata normal form. 1740/13872 useless extension candidates. Maximal degree in co-relation 44681. Up to 16184 conditions per place. [2023-09-01 03:33:53,342 INFO L137 encePairwiseOnDemand]: 479/483 looper letters, 71 selfloop transitions, 41 changer transitions 0/113 dead transitions. [2023-09-01 03:33:53,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 113 transitions, 1231 flow [2023-09-01 03:33:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:33:53,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:33:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 786 transitions. [2023-09-01 03:33:53,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40683229813664595 [2023-09-01 03:33:53,344 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 786 transitions. [2023-09-01 03:33:53,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 786 transitions. [2023-09-01 03:33:53,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:33:53,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 786 transitions. [2023-09-01 03:33:53,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:53,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:53,346 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:53,346 INFO L175 Difference]: Start difference. First operand has 120 places, 115 transitions, 1023 flow. Second operand 4 states and 786 transitions. [2023-09-01 03:33:53,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 113 transitions, 1231 flow [2023-09-01 03:33:53,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 113 transitions, 1202 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:33:53,355 INFO L231 Difference]: Finished difference. Result has 117 places, 113 transitions, 1060 flow [2023-09-01 03:33:53,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1060, PETRI_PLACES=117, PETRI_TRANSITIONS=113} [2023-09-01 03:33:53,356 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 58 predicate places. [2023-09-01 03:33:53,356 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 113 transitions, 1060 flow [2023-09-01 03:33:53,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:33:53,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:33:53,357 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1] [2023-09-01 03:33:53,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 03:33:53,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:33:53,567 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:33:53,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:33:53,567 INFO L85 PathProgramCache]: Analyzing trace with hash -602554020, now seen corresponding path program 1 times [2023-09-01 03:33:53,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:33:53,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706730442] [2023-09-01 03:33:53,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:33:53,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:33:53,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:33:53,568 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:33:53,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 03:33:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:33:53,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 03:33:53,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:33:53,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 03:33:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:33:54,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:33:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:33:59,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:33:59,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706730442] [2023-09-01 03:33:59,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706730442] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:33:59,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:33:59,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2023-09-01 03:33:59,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546913571] [2023-09-01 03:33:59,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:33:59,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 03:33:59,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:33:59,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 03:33:59,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2023-09-01 03:34:42,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 483 [2023-09-01 03:34:42,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 113 transitions, 1060 flow. Second operand has 32 states, 32 states have (on average 184.03125) internal successors, (5889), 32 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:34:42,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:34:42,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 483 [2023-09-01 03:34:42,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:34:52,619 WARN L222 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:34:55,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:34:57,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:34:58,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:00,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:02,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:04,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:06,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:08,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:10,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:12,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:14,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:16,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:18,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:35:20,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:36:07,431 INFO L130 PetriNetUnfolder]: 26418/39388 cut-off events. [2023-09-01 03:36:07,432 INFO L131 PetriNetUnfolder]: For 20931/20931 co-relation queries the response was YES. [2023-09-01 03:36:07,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107526 conditions, 39388 events. 26418/39388 cut-off events. For 20931/20931 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 242835 event pairs, 13166 based on Foata normal form. 64/29357 useless extension candidates. Maximal degree in co-relation 107476. Up to 13399 conditions per place. [2023-09-01 03:36:07,860 INFO L137 encePairwiseOnDemand]: 477/483 looper letters, 824 selfloop transitions, 76 changer transitions 0/901 dead transitions. [2023-09-01 03:36:07,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 901 transitions, 6335 flow [2023-09-01 03:36:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 03:36:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 03:36:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 6581 transitions. [2023-09-01 03:36:07,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42578933747412007 [2023-09-01 03:36:07,866 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 6581 transitions. [2023-09-01 03:36:07,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 6581 transitions. [2023-09-01 03:36:07,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:36:07,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 6581 transitions. [2023-09-01 03:36:07,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 205.65625) internal successors, (6581), 32 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:07,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 483.0) internal successors, (15939), 33 states have internal predecessors, (15939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:07,882 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 483.0) internal successors, (15939), 33 states have internal predecessors, (15939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:07,883 INFO L175 Difference]: Start difference. First operand has 117 places, 113 transitions, 1060 flow. Second operand 32 states and 6581 transitions. [2023-09-01 03:36:07,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 901 transitions, 6335 flow [2023-09-01 03:36:07,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 901 transitions, 6199 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:36:07,916 INFO L231 Difference]: Finished difference. Result has 163 places, 132 transitions, 1450 flow [2023-09-01 03:36:07,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1450, PETRI_PLACES=163, PETRI_TRANSITIONS=132} [2023-09-01 03:36:07,917 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 104 predicate places. [2023-09-01 03:36:07,917 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 132 transitions, 1450 flow [2023-09-01 03:36:07,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 184.03125) internal successors, (5889), 32 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:36:07,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:36:07,918 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-09-01 03:36:07,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-09-01 03:36:08,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:08,120 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:36:08,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:36:08,120 INFO L85 PathProgramCache]: Analyzing trace with hash 783778223, now seen corresponding path program 4 times [2023-09-01 03:36:08,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:36:08,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776454054] [2023-09-01 03:36:08,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:36:08,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:36:08,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:36:08,122 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:36:08,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 03:36:08,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:36:08,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:36:08,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 03:36:08,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:36:08,486 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:36:08,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:36:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:36:10,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:36:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:36:21,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:36:21,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776454054] [2023-09-01 03:36:21,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776454054] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:36:21,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:36:21,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-09-01 03:36:21,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560579083] [2023-09-01 03:36:21,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:36:21,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-09-01 03:36:21,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:36:21,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-09-01 03:36:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-09-01 03:38:07,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 483 [2023-09-01 03:38:07,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 132 transitions, 1450 flow. Second operand has 48 states, 48 states have (on average 184.0) internal successors, (8832), 48 states have internal predecessors, (8832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:07,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:38:07,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 483 [2023-09-01 03:38:07,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:38:44,608 WARN L222 SmtUtils]: Spent 19.66s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:39:01,260 WARN L222 SmtUtils]: Spent 13.76s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:39:19,306 WARN L222 SmtUtils]: Spent 14.84s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:39:21,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:23,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:25,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:27,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:29,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:31,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:33,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:35,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:37,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:39,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:41,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:43,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:45,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:47,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:49,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:51,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:53,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:55,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:57,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:39:59,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:40:01,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:40:03,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:40:17,057 WARN L222 SmtUtils]: Spent 11.11s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:40:29,435 WARN L222 SmtUtils]: Spent 9.85s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:40:39,314 WARN L222 SmtUtils]: Spent 7.25s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:40:48,623 WARN L222 SmtUtils]: Spent 6.70s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:40:58,661 WARN L222 SmtUtils]: Spent 7.11s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:41:39,571 INFO L130 PetriNetUnfolder]: 26442/39436 cut-off events. [2023-09-01 03:41:39,571 INFO L131 PetriNetUnfolder]: For 21501/21501 co-relation queries the response was YES. [2023-09-01 03:41:39,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108208 conditions, 39436 events. 26442/39436 cut-off events. For 21501/21501 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 242998 event pairs, 13166 based on Foata normal form. 24/29365 useless extension candidates. Maximal degree in co-relation 108140. Up to 13399 conditions per place. [2023-09-01 03:41:40,006 INFO L137 encePairwiseOnDemand]: 477/483 looper letters, 682 selfloop transitions, 126 changer transitions 0/809 dead transitions. [2023-09-01 03:41:40,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 809 transitions, 6251 flow [2023-09-01 03:41:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 03:41:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 03:41:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 9458 transitions. [2023-09-01 03:41:40,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079537612146308 [2023-09-01 03:41:40,016 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 9458 transitions. [2023-09-01 03:41:40,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 9458 transitions. [2023-09-01 03:41:40,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:40,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 9458 transitions. [2023-09-01 03:41:40,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 197.04166666666666) internal successors, (9458), 48 states have internal predecessors, (9458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:40,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 483.0) internal successors, (23667), 49 states have internal predecessors, (23667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:40,044 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 483.0) internal successors, (23667), 49 states have internal predecessors, (23667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:40,045 INFO L175 Difference]: Start difference. First operand has 163 places, 132 transitions, 1450 flow. Second operand 48 states and 9458 transitions. [2023-09-01 03:41:40,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 809 transitions, 6251 flow [2023-09-01 03:41:40,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 809 transitions, 6109 flow, removed 16 selfloop flow, removed 12 redundant places. [2023-09-01 03:41:40,097 INFO L231 Difference]: Finished difference. Result has 223 places, 183 transitions, 2264 flow [2023-09-01 03:41:40,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2264, PETRI_PLACES=223, PETRI_TRANSITIONS=183} [2023-09-01 03:41:40,097 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 164 predicate places. [2023-09-01 03:41:40,098 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 183 transitions, 2264 flow [2023-09-01 03:41:40,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 184.0) internal successors, (8832), 48 states have internal predecessors, (8832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:40,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:40,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:40,107 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 (24)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:40,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:41:40,299 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:41:40,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1895524827, now seen corresponding path program 1 times [2023-09-01 03:41:40,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:41:40,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854267687] [2023-09-01 03:41:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:40,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:41:40,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:41:40,301 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:41:40,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 03:41:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:40,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:41:40,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:41:40,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:41:40,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:41:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854267687] [2023-09-01 03:41:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854267687] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:41:40,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:41:40,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 03:41:40,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820618651] [2023-09-01 03:41:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:41:40,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 03:41:40,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:41:40,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 03:41:40,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 03:41:41,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 483 [2023-09-01 03:41:41,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 183 transitions, 2264 flow. Second operand has 9 states, 9 states have (on average 188.66666666666666) internal successors, (1698), 9 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:41,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:41,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 483 [2023-09-01 03:41:41,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:51,240 INFO L130 PetriNetUnfolder]: 37897/58750 cut-off events. [2023-09-01 03:41:51,240 INFO L131 PetriNetUnfolder]: For 14667/14667 co-relation queries the response was YES. [2023-09-01 03:41:52,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156053 conditions, 58750 events. 37897/58750 cut-off events. For 14667/14667 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 412788 event pairs, 2726 based on Foata normal form. 87/45613 useless extension candidates. Maximal degree in co-relation 155959. Up to 39673 conditions per place. [2023-09-01 03:41:52,308 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 193 selfloop transitions, 39 changer transitions 3/235 dead transitions. [2023-09-01 03:41:52,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 235 transitions, 2879 flow [2023-09-01 03:41:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:41:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:41:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1758 transitions. [2023-09-01 03:41:52,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044168391994479 [2023-09-01 03:41:52,313 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1758 transitions. [2023-09-01 03:41:52,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1758 transitions. [2023-09-01 03:41:52,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:52,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1758 transitions. [2023-09-01 03:41:52,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 195.33333333333334) internal successors, (1758), 9 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:52,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:52,318 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:52,319 INFO L175 Difference]: Start difference. First operand has 223 places, 183 transitions, 2264 flow. Second operand 9 states and 1758 transitions. [2023-09-01 03:41:52,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 235 transitions, 2879 flow [2023-09-01 03:41:52,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 235 transitions, 2597 flow, removed 66 selfloop flow, removed 20 redundant places. [2023-09-01 03:41:52,400 INFO L231 Difference]: Finished difference. Result has 214 places, 194 transitions, 2131 flow [2023-09-01 03:41:52,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1982, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2131, PETRI_PLACES=214, PETRI_TRANSITIONS=194} [2023-09-01 03:41:52,401 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 155 predicate places. [2023-09-01 03:41:52,401 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 194 transitions, 2131 flow [2023-09-01 03:41:52,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 188.66666666666666) internal successors, (1698), 9 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:52,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:52,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:52,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:52,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:41:52,602 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:41:52,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:52,603 INFO L85 PathProgramCache]: Analyzing trace with hash -837557187, now seen corresponding path program 2 times [2023-09-01 03:41:52,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:41:52,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060189727] [2023-09-01 03:41:52,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:41:52,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:41:52,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:41:52,604 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:41:52,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 03:41:52,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:41:52,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:52,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:41:52,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:41:53,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:41:53,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:41:53,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060189727] [2023-09-01 03:41:53,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060189727] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:41:53,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:41:53,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 03:41:53,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785768115] [2023-09-01 03:41:53,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:41:53,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 03:41:53,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:41:53,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 03:41:53,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-09-01 03:41:53,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-09-01 03:41:53,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 194 transitions, 2131 flow. Second operand has 9 states, 9 states have (on average 187.66666666666666) internal successors, (1689), 9 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:53,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:53,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-09-01 03:41:53,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:06,367 INFO L130 PetriNetUnfolder]: 42224/66256 cut-off events. [2023-09-01 03:42:06,367 INFO L131 PetriNetUnfolder]: For 59383/59383 co-relation queries the response was YES. [2023-09-01 03:42:07,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213432 conditions, 66256 events. 42224/66256 cut-off events. For 59383/59383 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 476153 event pairs, 9744 based on Foata normal form. 84/53740 useless extension candidates. Maximal degree in co-relation 213334. Up to 53089 conditions per place. [2023-09-01 03:42:07,927 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 192 selfloop transitions, 41 changer transitions 3/236 dead transitions. [2023-09-01 03:42:07,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 236 transitions, 2765 flow [2023-09-01 03:42:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:42:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:42:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1739 transitions. [2023-09-01 03:42:07,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4000460087416609 [2023-09-01 03:42:07,931 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1739 transitions. [2023-09-01 03:42:07,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1739 transitions. [2023-09-01 03:42:07,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:07,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1739 transitions. [2023-09-01 03:42:07,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.22222222222223) internal successors, (1739), 9 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:07,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:07,935 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:07,935 INFO L175 Difference]: Start difference. First operand has 214 places, 194 transitions, 2131 flow. Second operand 9 states and 1739 transitions. [2023-09-01 03:42:07,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 236 transitions, 2765 flow [2023-09-01 03:42:10,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 236 transitions, 2687 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-09-01 03:42:10,560 INFO L231 Difference]: Finished difference. Result has 224 places, 208 transitions, 2288 flow [2023-09-01 03:42:10,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2288, PETRI_PLACES=224, PETRI_TRANSITIONS=208} [2023-09-01 03:42:10,561 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 165 predicate places. [2023-09-01 03:42:10,561 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 208 transitions, 2288 flow [2023-09-01 03:42:10,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 187.66666666666666) internal successors, (1689), 9 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:10,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:42:10,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:42:10,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-09-01 03:42:10,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:42:10,772 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:42:10,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:42:10,773 INFO L85 PathProgramCache]: Analyzing trace with hash -622914771, now seen corresponding path program 3 times [2023-09-01 03:42:10,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:42:10,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210549639] [2023-09-01 03:42:10,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:42:10,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:42:10,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:42:10,774 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:42:10,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 03:42:10,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 03:42:10,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:42:10,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:42:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:42:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:42:11,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:42:11,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:42:11,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210549639] [2023-09-01 03:42:11,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210549639] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:42:11,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:42:11,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 03:42:11,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58502579] [2023-09-01 03:42:11,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:42:11,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 03:42:11,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:42:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 03:42:11,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 03:42:11,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 483 [2023-09-01 03:42:11,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 208 transitions, 2288 flow. Second operand has 9 states, 9 states have (on average 188.66666666666666) internal successors, (1698), 9 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:11,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:11,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 483 [2023-09-01 03:42:11,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:27,279 INFO L130 PetriNetUnfolder]: 51632/80956 cut-off events. [2023-09-01 03:42:27,279 INFO L131 PetriNetUnfolder]: For 89513/89513 co-relation queries the response was YES. [2023-09-01 03:42:28,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293685 conditions, 80956 events. 51632/80956 cut-off events. For 89513/89513 co-relation queries the response was YES. Maximal size of possible extension queue 1060. Compared 601642 event pairs, 6328 based on Foata normal form. 84/65752 useless extension candidates. Maximal degree in co-relation 293582. Up to 51073 conditions per place. [2023-09-01 03:42:29,137 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 201 selfloop transitions, 58 changer transitions 3/262 dead transitions. [2023-09-01 03:42:29,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 262 transitions, 3013 flow [2023-09-01 03:42:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:42:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:42:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1764 transitions. [2023-09-01 03:42:29,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2023-09-01 03:42:29,140 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1764 transitions. [2023-09-01 03:42:29,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1764 transitions. [2023-09-01 03:42:29,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:29,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1764 transitions. [2023-09-01 03:42:29,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 196.0) internal successors, (1764), 9 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:29,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:29,145 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:29,145 INFO L175 Difference]: Start difference. First operand has 224 places, 208 transitions, 2288 flow. Second operand 9 states and 1764 transitions. [2023-09-01 03:42:29,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 262 transitions, 3013 flow [2023-09-01 03:42:34,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 262 transitions, 2958 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-09-01 03:42:34,156 INFO L231 Difference]: Finished difference. Result has 233 places, 219 transitions, 2471 flow [2023-09-01 03:42:34,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2235, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2471, PETRI_PLACES=233, PETRI_TRANSITIONS=219} [2023-09-01 03:42:34,157 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 174 predicate places. [2023-09-01 03:42:34,157 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 219 transitions, 2471 flow [2023-09-01 03:42:34,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 188.66666666666666) internal successors, (1698), 9 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:34,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:42:34,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:42:34,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 03:42:34,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:42:34,358 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:42:34,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:42:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1238638903, now seen corresponding path program 4 times [2023-09-01 03:42:34,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:42:34,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747716437] [2023-09-01 03:42:34,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:42:34,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:42:34,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:42:34,360 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:42:34,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 03:42:34,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:42:34,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:42:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:42:34,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:42:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:42:35,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:42:35,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:42:35,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747716437] [2023-09-01 03:42:35,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747716437] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:42:35,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:42:35,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 03:42:35,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330767280] [2023-09-01 03:42:35,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:42:35,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 03:42:35,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:42:35,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 03:42:35,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-09-01 03:42:35,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-09-01 03:42:35,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 219 transitions, 2471 flow. Second operand has 9 states, 9 states have (on average 187.66666666666666) internal successors, (1689), 9 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:35,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:35,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-09-01 03:42:35,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:51,622 INFO L130 PetriNetUnfolder]: 52388/82972 cut-off events. [2023-09-01 03:42:51,623 INFO L131 PetriNetUnfolder]: For 144253/144253 co-relation queries the response was YES. [2023-09-01 03:42:53,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336228 conditions, 82972 events. 52388/82972 cut-off events. For 144253/144253 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 622945 event pairs, 15568 based on Foata normal form. 84/68608 useless extension candidates. Maximal degree in co-relation 336122. Up to 69805 conditions per place. [2023-09-01 03:42:53,838 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 213 selfloop transitions, 42 changer transitions 3/258 dead transitions. [2023-09-01 03:42:53,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 258 transitions, 3139 flow [2023-09-01 03:42:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 03:42:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 03:42:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1741 transitions. [2023-09-01 03:42:53,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005060961582701 [2023-09-01 03:42:53,842 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1741 transitions. [2023-09-01 03:42:53,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1741 transitions. [2023-09-01 03:42:53,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:53,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1741 transitions. [2023-09-01 03:42:53,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.44444444444446) internal successors, (1741), 9 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:53,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:53,849 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:53,849 INFO L175 Difference]: Start difference. First operand has 233 places, 219 transitions, 2471 flow. Second operand 9 states and 1741 transitions. [2023-09-01 03:42:53,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 258 transitions, 3139 flow [2023-09-01 03:43:18,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 258 transitions, 3007 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-09-01 03:43:18,004 INFO L231 Difference]: Finished difference. Result has 241 places, 226 transitions, 2530 flow [2023-09-01 03:43:18,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2530, PETRI_PLACES=241, PETRI_TRANSITIONS=226} [2023-09-01 03:43:18,005 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 182 predicate places. [2023-09-01 03:43:18,005 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 226 transitions, 2530 flow [2023-09-01 03:43:18,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 187.66666666666666) internal successors, (1689), 9 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:18,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:43:18,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:43:18,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-09-01 03:43:18,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:43:18,209 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-09-01 03:43:18,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:43:18,209 INFO L85 PathProgramCache]: Analyzing trace with hash -134296141, now seen corresponding path program 1 times [2023-09-01 03:43:18,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:43:18,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544318555] [2023-09-01 03:43:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:43:18,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:43:18,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:43:18,210 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:43:18,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-09-01 03:43:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:43:18,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:43:18,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:43:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:43:18,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:43:18,659 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2023-09-01 03:43:18,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 28 [2023-09-01 03:43:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:43:18,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:43:18,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544318555] [2023-09-01 03:43:18,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544318555] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:43:18,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:43:18,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-09-01 03:43:18,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910453938] [2023-09-01 03:43:18,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:43:18,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:43:18,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:43:18,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:43:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:43:19,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 483 [2023-09-01 03:43:19,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 226 transitions, 2530 flow. Second operand has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:19,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:43:19,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 483 [2023-09-01 03:43:19,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:43:38,864 INFO L130 PetriNetUnfolder]: 62524/98148 cut-off events. [2023-09-01 03:43:38,864 INFO L131 PetriNetUnfolder]: For 164973/165869 co-relation queries the response was YES. Killed by 15