./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/parallel-parallel-sum-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:39:46,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:39:46,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:39:46,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:39:46,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:39:46,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:39:46,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:39:46,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:39:46,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:39:46,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:39:46,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:39:46,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:39:46,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:39:46,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:39:46,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:39:46,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:39:46,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:39:46,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:39:46,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:39:46,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:39:46,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:39:46,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:39:46,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:39:46,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:39:46,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:39:46,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:39:46,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:39:46,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:39:46,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:39:46,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:39:46,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:39:46,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:39:46,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:39:46,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:39:46,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:39:46,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:39:46,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:39:46,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:39:46,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:39:46,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:39:46,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:39:46,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:39:46,992 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:39:46,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:39:46,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:39:46,993 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:39:46,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:39:46,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:39:46,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:39:46,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:39:46,995 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:39:46,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:39:46,995 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:39:46,996 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:39:46,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:39:46,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:39:46,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:39:46,996 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:39:46,996 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:39:46,996 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:39:46,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:39:46,997 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:39:46,997 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:39:46,997 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:39:46,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:39:46,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:39:46,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:39:46,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:39:46,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:39:46,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:39:46,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:39:46,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:39:46,998 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:39:46,998 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:39:46,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:39:46,999 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:39:46,999 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:39:47,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:39:47,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:39:47,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:39:47,249 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:39:47,250 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:39:47,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-29 23:39:48,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:39:48,314 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:39:48,315 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-29 23:39:48,319 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bf9da501/42406b8051f74481bc6a161e0c42b34b/FLAGe982772ff [2023-08-29 23:39:48,331 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bf9da501/42406b8051f74481bc6a161e0c42b34b [2023-08-29 23:39:48,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:39:48,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:39:48,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:39:48,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:39:48,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:39:48,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:39:48" (1/1) ... [2023-08-29 23:39:48,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34143f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:48, skipping insertion in model container [2023-08-29 23:39:48,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:39:48" (1/1) ... [2023-08-29 23:39:48,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:39:48,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:39:48,532 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-29 23:39:48,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:39:48,556 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:39:48,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4094be3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:48, skipping insertion in model container [2023-08-29 23:39:48,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:39:48,558 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:39:48,559 INFO L158 Benchmark]: Toolchain (without parser) took 225.17ms. Allocated memory is still 67.1MB. Free memory was 44.2MB in the beginning and 33.5MB in the end (delta: 10.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-29 23:39:48,560 INFO L158 Benchmark]: CDTParser took 0.66ms. Allocated memory is still 54.5MB. Free memory is still 32.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:39:48,560 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.07ms. Allocated memory is still 67.1MB. Free memory was 44.1MB in the beginning and 33.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:39:48,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.66ms. Allocated memory is still 54.5MB. Free memory is still 32.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 223.07ms. Allocated memory is still 67.1MB. Free memory was 44.1MB in the beginning and 33.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 175]: 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/parallel-parallel-sum-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:39:49,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:39:49,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:39:49,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:39:49,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:39:49,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:39:49,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:39:49,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:39:49,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:39:49,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:39:49,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:39:49,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:39:49,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:39:49,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:39:49,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:39:49,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:39:49,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:39:49,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:39:49,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:39:49,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:39:49,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:39:49,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:39:49,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:39:49,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:39:49,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:39:49,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:39:49,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:39:49,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:39:49,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:39:49,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:39:49,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:39:49,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:39:49,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:39:49,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:39:49,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:39:49,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:39:49,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:39:49,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:39:49,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:39:49,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:39:49,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:39:49,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:39:49,990 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:39:49,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:39:49,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:39:49,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:39:49,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:39:49,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:39:49,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:39:49,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:39:49,992 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:39:49,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:39:49,993 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:39:49,993 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:39:49,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:39:49,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:39:49,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:39:49,994 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:39:49,994 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:39:49,994 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:39:49,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:39:49,994 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:39:49,994 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:39:49,995 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:39:49,995 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:39:49,995 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:39:49,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:39:49,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:39:49,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:39:49,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:39:49,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:39:49,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:39:49,996 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:39:49,996 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:39:49,996 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:39:49,997 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:39:49,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:39:49,997 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:39:49,997 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:39:49,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:39:50,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:39:50,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:39:50,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:39:50,240 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:39:50,240 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:39:50,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-29 23:39:51,111 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:39:51,258 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:39:51,258 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-29 23:39:51,262 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b8f46d8/940e7cf336d24d84a33c5674cac76a3d/FLAG0c9cd6f85 [2023-08-29 23:39:51,280 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b8f46d8/940e7cf336d24d84a33c5674cac76a3d [2023-08-29 23:39:51,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:39:51,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:39:51,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:39:51,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:39:51,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:39:51,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@613224db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51, skipping insertion in model container [2023-08-29 23:39:51,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:39:51,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:39:51,447 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-29 23:39:51,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:39:51,473 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:39:51,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:39:51,510 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-29 23:39:51,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:39:51,519 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:39:51,550 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-29 23:39:51,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:39:51,567 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:39:51,568 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:39:51,572 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:39:51,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51 WrapperNode [2023-08-29 23:39:51,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:39:51,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:39:51,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:39:51,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:39:51,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,637 INFO L138 Inliner]: procedures = 31, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 384 [2023-08-29 23:39:51,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:39:51,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:39:51,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:39:51,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:39:51,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,687 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:39:51,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:39:51,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:39:51,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:39:51,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (1/1) ... [2023-08-29 23:39:51,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:39:51,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:39:51,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:39:51,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:39:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:39:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:39:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:39:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:39:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:39:51,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:39:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:39:51,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:39:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:39:51,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:39:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 23:39:51,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 23:39:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-29 23:39:51,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-29 23:39:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-29 23:39:51,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-29 23:39:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:39:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:39:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:39:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:39:51,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:39:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:39:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:39:51,766 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:39:51,898 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:39:51,900 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:39:52,457 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:39:52,590 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:39:52,590 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-29 23:39:52,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:39:52 BoogieIcfgContainer [2023-08-29 23:39:52,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:39:52,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:39:52,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:39:52,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:39:52,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:39:51" (1/3) ... [2023-08-29 23:39:52,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1443d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:39:52, skipping insertion in model container [2023-08-29 23:39:52,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:39:51" (2/3) ... [2023-08-29 23:39:52,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1443d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:39:52, skipping insertion in model container [2023-08-29 23:39:52,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:39:52" (3/3) ... [2023-08-29 23:39:52,600 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2023-08-29 23:39:52,611 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:39:52,611 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-08-29 23:39:52,611 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:39:52,723 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-29 23:39:52,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 339 transitions, 750 flow [2023-08-29 23:39:52,846 INFO L130 PetriNetUnfolder]: 21/291 cut-off events. [2023-08-29 23:39:52,846 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:39:52,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 291 events. 21/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 488 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 244. Up to 3 conditions per place. [2023-08-29 23:39:52,863 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 339 transitions, 750 flow [2023-08-29 23:39:52,867 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 287 transitions, 622 flow [2023-08-29 23:39:52,869 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:39:52,875 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 285 places, 287 transitions, 622 flow [2023-08-29 23:39:52,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 285 places, 287 transitions, 622 flow [2023-08-29 23:39:52,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 287 transitions, 622 flow [2023-08-29 23:39:52,914 INFO L130 PetriNetUnfolder]: 21/287 cut-off events. [2023-08-29 23:39:52,914 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:39:52,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 287 events. 21/287 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 483 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 244. Up to 3 conditions per place. [2023-08-29 23:39:52,920 INFO L119 LiptonReduction]: Number of co-enabled transitions 14104 [2023-08-29 23:40:11,902 INFO L134 LiptonReduction]: Checked pairs total: 54760 [2023-08-29 23:40:11,902 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-08-29 23:40:11,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:40:11,915 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;@55d66aea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:40:11,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2023-08-29 23:40:11,916 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:40:11,916 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:40:11,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:11,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:40:11,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:40:11,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash 48378, now seen corresponding path program 1 times [2023-08-29 23:40:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:11,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593306519] [2023-08-29 23:40:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:11,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:11,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:11,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:11,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:40:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:12,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:40:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:12,190 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:40:12,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:40:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:12,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:12,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593306519] [2023-08-29 23:40:12,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593306519] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:12,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:12,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:12,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86278279] [2023-08-29 23:40:12,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:12,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:12,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:12,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:12,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 607 [2023-08-29 23:40:12,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:12,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:12,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 607 [2023-08-29 23:40:12,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:24,640 INFO L130 PetriNetUnfolder]: 132970/172130 cut-off events. [2023-08-29 23:40:24,640 INFO L131 PetriNetUnfolder]: For 12616/12616 co-relation queries the response was YES. [2023-08-29 23:40:25,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346008 conditions, 172130 events. 132970/172130 cut-off events. For 12616/12616 co-relation queries the response was YES. Maximal size of possible extension queue 6624. Compared 986401 event pairs, 105827 based on Foata normal form. 0/58464 useless extension candidates. Maximal degree in co-relation 343421. Up to 160367 conditions per place. [2023-08-29 23:40:25,678 INFO L137 encePairwiseOnDemand]: 601/607 looper letters, 72 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2023-08-29 23:40:25,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 422 flow [2023-08-29 23:40:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-08-29 23:40:25,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942339373970346 [2023-08-29 23:40:25,692 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-08-29 23:40:25,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-08-29 23:40:25,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:25,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-08-29 23:40:25,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:25,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:25,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:25,711 INFO L175 Difference]: Start difference. First operand has 106 places, 96 transitions, 240 flow. Second operand 3 states and 900 transitions. [2023-08-29 23:40:25,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 422 flow [2023-08-29 23:40:26,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 386 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-29 23:40:26,101 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 232 flow [2023-08-29 23:40:26,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-08-29 23:40:26,104 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2023-08-29 23:40:26,104 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 232 flow [2023-08-29 23:40:26,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:26,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:26,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:40:26,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:26,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:26,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:40:26,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:26,312 INFO L85 PathProgramCache]: Analyzing trace with hash 48377, now seen corresponding path program 1 times [2023-08-29 23:40:26,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:26,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681946197] [2023-08-29 23:40:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:26,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:26,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:26,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:26,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:40:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:26,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:40:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:26,416 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:40:26,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:40:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:26,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:26,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:26,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681946197] [2023-08-29 23:40:26,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681946197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:26,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:26,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:26,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577271598] [2023-08-29 23:40:26,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:26,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:26,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:26,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-08-29 23:40:26,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:26,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:26,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-08-29 23:40:26,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:36,976 INFO L130 PetriNetUnfolder]: 129376/167015 cut-off events. [2023-08-29 23:40:36,976 INFO L131 PetriNetUnfolder]: For 2896/2896 co-relation queries the response was YES. [2023-08-29 23:40:37,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326152 conditions, 167015 events. 129376/167015 cut-off events. For 2896/2896 co-relation queries the response was YES. Maximal size of possible extension queue 6624. Compared 955800 event pairs, 99066 based on Foata normal form. 0/55804 useless extension candidates. Maximal degree in co-relation 323786. Up to 149066 conditions per place. [2023-08-29 23:40:37,734 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 99 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2023-08-29 23:40:37,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 140 transitions, 533 flow [2023-08-29 23:40:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 912 transitions. [2023-08-29 23:40:37,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500823723228995 [2023-08-29 23:40:37,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 912 transitions. [2023-08-29 23:40:37,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 912 transitions. [2023-08-29 23:40:37,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:37,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 912 transitions. [2023-08-29 23:40:37,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:37,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:37,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:37,744 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 232 flow. Second operand 3 states and 912 transitions. [2023-08-29 23:40:37,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 140 transitions, 533 flow [2023-08-29 23:40:37,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 140 transitions, 529 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:40:37,750 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 243 flow [2023-08-29 23:40:37,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2023-08-29 23:40:37,752 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -9 predicate places. [2023-08-29 23:40:37,752 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 243 flow [2023-08-29 23:40:37,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:37,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:37,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:40:37,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-29 23:40:37,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:37,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:40:37,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:37,960 INFO L85 PathProgramCache]: Analyzing trace with hash 48469, now seen corresponding path program 1 times [2023-08-29 23:40:37,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:37,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756908122] [2023-08-29 23:40:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:37,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:37,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:37,962 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:37,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:40:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:38,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:40:38,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:38,048 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 23:40:38,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2023-08-29 23:40:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:38,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:38,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:38,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756908122] [2023-08-29 23:40:38,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756908122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:38,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:38,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:38,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689775907] [2023-08-29 23:40:38,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:38,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:38,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:38,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:38,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-08-29 23:40:38,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:38,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:38,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-08-29 23:40:38,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:46,222 INFO L130 PetriNetUnfolder]: 96720/125415 cut-off events. [2023-08-29 23:40:46,222 INFO L131 PetriNetUnfolder]: For 2685/2685 co-relation queries the response was YES. [2023-08-29 23:40:46,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245912 conditions, 125415 events. 96720/125415 cut-off events. For 2685/2685 co-relation queries the response was YES. Maximal size of possible extension queue 5018. Compared 702286 event pairs, 73008 based on Foata normal form. 0/44096 useless extension candidates. Maximal degree in co-relation 240389. Up to 110403 conditions per place. [2023-08-29 23:40:46,776 INFO L137 encePairwiseOnDemand]: 602/607 looper letters, 97 selfloop transitions, 3 changer transitions 0/138 dead transitions. [2023-08-29 23:40:46,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 138 transitions, 534 flow [2023-08-29 23:40:46,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 911 transitions. [2023-08-29 23:40:46,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500274574409665 [2023-08-29 23:40:46,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 911 transitions. [2023-08-29 23:40:46,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 911 transitions. [2023-08-29 23:40:46,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:46,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 911 transitions. [2023-08-29 23:40:46,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:46,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:46,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:46,784 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 243 flow. Second operand 3 states and 911 transitions. [2023-08-29 23:40:46,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 138 transitions, 534 flow [2023-08-29 23:40:46,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 138 transitions, 531 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:40:46,798 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 249 flow [2023-08-29 23:40:46,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2023-08-29 23:40:46,799 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -8 predicate places. [2023-08-29 23:40:46,799 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 249 flow [2023-08-29 23:40:46,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:46,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:46,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:40:46,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:47,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:47,000 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:40:47,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:47,001 INFO L85 PathProgramCache]: Analyzing trace with hash 48468, now seen corresponding path program 1 times [2023-08-29 23:40:47,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:47,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729097715] [2023-08-29 23:40:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:47,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:47,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:47,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:47,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:40:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:40:47,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:47,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:40:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:40:47,109 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:40:47,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 23:40:47,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 23:40:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:47,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:47,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:47,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729097715] [2023-08-29 23:40:47,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729097715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:47,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:47,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:47,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030495357] [2023-08-29 23:40:47,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:47,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:47,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:47,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:47,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:47,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 607 [2023-08-29 23:40:47,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:47,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:47,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 607 [2023-08-29 23:40:47,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:52,642 INFO L130 PetriNetUnfolder]: 63071/82538 cut-off events. [2023-08-29 23:40:52,643 INFO L131 PetriNetUnfolder]: For 2665/2665 co-relation queries the response was YES. [2023-08-29 23:40:52,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162417 conditions, 82538 events. 63071/82538 cut-off events. For 2665/2665 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 450562 event pairs, 49781 based on Foata normal form. 0/32294 useless extension candidates. Maximal degree in co-relation 158362. Up to 76835 conditions per place. [2023-08-29 23:40:52,985 INFO L137 encePairwiseOnDemand]: 604/607 looper letters, 57 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-08-29 23:40:52,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 96 transitions, 361 flow [2023-08-29 23:40:52,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2023-08-29 23:40:52,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48929159802306427 [2023-08-29 23:40:52,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2023-08-29 23:40:52,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2023-08-29 23:40:52,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:52,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2023-08-29 23:40:52,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:52,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:52,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:52,993 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 249 flow. Second operand 3 states and 891 transitions. [2023-08-29 23:40:52,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 96 transitions, 361 flow [2023-08-29 23:40:52,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 96 transitions, 355 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:40:52,999 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 241 flow [2023-08-29 23:40:52,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2023-08-29 23:40:53,000 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2023-08-29 23:40:53,000 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 241 flow [2023-08-29 23:40:53,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:53,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:53,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:40:53,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-29 23:40:53,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:53,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:40:53,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1502991, now seen corresponding path program 1 times [2023-08-29 23:40:53,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:53,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340491878] [2023-08-29 23:40:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:53,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:40:53,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:53,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:40:53,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:40:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:53,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:40:53,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:53,515 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:40:53,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:40:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:53,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:40:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:53,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:53,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340491878] [2023-08-29 23:40:53,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340491878] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:40:53,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:40:53,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:40:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697387363] [2023-08-29 23:40:53,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:40:53,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:40:53,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:53,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:40:53,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:40:54,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 607 [2023-08-29 23:40:54,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:54,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:54,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 607 [2023-08-29 23:40:54,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:00,745 INFO L130 PetriNetUnfolder]: 64778/84987 cut-off events. [2023-08-29 23:41:00,745 INFO L131 PetriNetUnfolder]: For 2394/2394 co-relation queries the response was YES. [2023-08-29 23:41:00,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167185 conditions, 84987 events. 64778/84987 cut-off events. For 2394/2394 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 463977 event pairs, 50654 based on Foata normal form. 0/33788 useless extension candidates. Maximal degree in co-relation 167174. Up to 79037 conditions per place. [2023-08-29 23:41:01,058 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 76 selfloop transitions, 17 changer transitions 0/125 dead transitions. [2023-08-29 23:41:01,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 125 transitions, 509 flow [2023-08-29 23:41:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:41:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:41:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1708 transitions. [2023-08-29 23:41:01,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46897309170785284 [2023-08-29 23:41:01,063 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1708 transitions. [2023-08-29 23:41:01,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1708 transitions. [2023-08-29 23:41:01,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:01,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1708 transitions. [2023-08-29 23:41:01,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.6666666666667) internal successors, (1708), 6 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,071 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,071 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 241 flow. Second operand 6 states and 1708 transitions. [2023-08-29 23:41:01,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 125 transitions, 509 flow [2023-08-29 23:41:01,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 125 transitions, 508 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:41:01,075 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 368 flow [2023-08-29 23:41:01,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2023-08-29 23:41:01,076 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -2 predicate places. [2023-08-29 23:41:01,076 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 368 flow [2023-08-29 23:41:01,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:01,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:01,077 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:41:01,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:01,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:01,283 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:01,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:01,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1829182010, now seen corresponding path program 2 times [2023-08-29 23:41:01,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:01,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096852827] [2023-08-29 23:41:01,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:41:01,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:01,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:01,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:01,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:41:01,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:41:01,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:41:01,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:41:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:01,413 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:41:01,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:41:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:01,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:41:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:01,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:01,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096852827] [2023-08-29 23:41:01,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096852827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:41:01,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:41:01,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:41:01,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70962338] [2023-08-29 23:41:01,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:41:01,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:41:01,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:01,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:41:01,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:41:05,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-08-29 23:41:05,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 368 flow. Second operand has 12 states, 12 states have (on average 271.0) internal successors, (3252), 12 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:05,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:05,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-08-29 23:41:05,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:14,817 INFO L130 PetriNetUnfolder]: 64827/85125 cut-off events. [2023-08-29 23:41:14,818 INFO L131 PetriNetUnfolder]: For 3701/3701 co-relation queries the response was YES. [2023-08-29 23:41:14,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168344 conditions, 85125 events. 64827/85125 cut-off events. For 3701/3701 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 465065 event pairs, 44016 based on Foata normal form. 6/33910 useless extension candidates. Maximal degree in co-relation 168328. Up to 79065 conditions per place. [2023-08-29 23:41:15,169 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 114 selfloop transitions, 40 changer transitions 0/186 dead transitions. [2023-08-29 23:41:15,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 186 transitions, 1003 flow [2023-08-29 23:41:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:41:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:41:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3938 transitions. [2023-08-29 23:41:15,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634031536832196 [2023-08-29 23:41:15,178 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3938 transitions. [2023-08-29 23:41:15,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3938 transitions. [2023-08-29 23:41:15,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:15,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3938 transitions. [2023-08-29 23:41:15,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 281.2857142857143) internal successors, (3938), 14 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:15,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 607.0) internal successors, (9105), 15 states have internal predecessors, (9105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:15,191 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 607.0) internal successors, (9105), 15 states have internal predecessors, (9105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:15,191 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 368 flow. Second operand 14 states and 3938 transitions. [2023-08-29 23:41:15,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 186 transitions, 1003 flow [2023-08-29 23:41:15,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 186 transitions, 953 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-08-29 23:41:15,200 INFO L231 Difference]: Finished difference. Result has 124 places, 134 transitions, 654 flow [2023-08-29 23:41:15,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=654, PETRI_PLACES=124, PETRI_TRANSITIONS=134} [2023-08-29 23:41:15,203 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 18 predicate places. [2023-08-29 23:41:15,203 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 134 transitions, 654 flow [2023-08-29 23:41:15,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 271.0) internal successors, (3252), 12 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:15,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:15,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:41:15,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:15,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:15,411 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:15,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:15,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1847298388, now seen corresponding path program 1 times [2023-08-29 23:41:15,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:15,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419610289] [2023-08-29 23:41:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:15,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:15,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:15,413 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:15,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:41:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:15,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 23:41:15,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:15,510 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 23:41:15,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-29 23:41:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:15,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:15,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:15,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419610289] [2023-08-29 23:41:15,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419610289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:15,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:15,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:41:15,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857766062] [2023-08-29 23:41:15,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:15,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:41:15,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:15,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:41:15,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:41:15,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 607 [2023-08-29 23:41:15,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 134 transitions, 654 flow. Second operand has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:15,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:15,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 607 [2023-08-29 23:41:15,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:21,657 INFO L130 PetriNetUnfolder]: 65465/86111 cut-off events. [2023-08-29 23:41:21,657 INFO L131 PetriNetUnfolder]: For 2455/2457 co-relation queries the response was YES. [2023-08-29 23:41:21,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169440 conditions, 86111 events. 65465/86111 cut-off events. For 2455/2457 co-relation queries the response was YES. Maximal size of possible extension queue 3414. Compared 472393 event pairs, 48560 based on Foata normal form. 1/34109 useless extension candidates. Maximal degree in co-relation 169415. Up to 75070 conditions per place. [2023-08-29 23:41:22,148 INFO L137 encePairwiseOnDemand]: 598/607 looper letters, 113 selfloop transitions, 8 changer transitions 0/183 dead transitions. [2023-08-29 23:41:22,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 183 transitions, 1013 flow [2023-08-29 23:41:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:41:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:41:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 910 transitions. [2023-08-29 23:41:22,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.499725425590335 [2023-08-29 23:41:22,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 910 transitions. [2023-08-29 23:41:22,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 910 transitions. [2023-08-29 23:41:22,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:22,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 910 transitions. [2023-08-29 23:41:22,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:22,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:22,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:22,155 INFO L175 Difference]: Start difference. First operand has 124 places, 134 transitions, 654 flow. Second operand 3 states and 910 transitions. [2023-08-29 23:41:22,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 183 transitions, 1013 flow [2023-08-29 23:41:22,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 183 transitions, 981 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-29 23:41:22,161 INFO L231 Difference]: Finished difference. Result has 126 places, 139 transitions, 680 flow [2023-08-29 23:41:22,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=680, PETRI_PLACES=126, PETRI_TRANSITIONS=139} [2023-08-29 23:41:22,162 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 20 predicate places. [2023-08-29 23:41:22,162 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 139 transitions, 680 flow [2023-08-29 23:41:22,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:22,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:22,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:41:22,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:22,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:22,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:22,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:22,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1847298389, now seen corresponding path program 1 times [2023-08-29 23:41:22,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:22,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644335497] [2023-08-29 23:41:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:22,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:22,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:22,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:22,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:41:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:22,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:41:22,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:41:22,462 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-29 23:41:22,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-29 23:41:22,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-08-29 23:41:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:22,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:22,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:22,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644335497] [2023-08-29 23:41:22,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644335497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:22,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:22,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:41:22,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383627340] [2023-08-29 23:41:22,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:22,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:41:22,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:22,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:41:22,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:41:22,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 607 [2023-08-29 23:41:22,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 139 transitions, 680 flow. Second operand has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:22,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:22,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 607 [2023-08-29 23:41:22,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:28,833 INFO L130 PetriNetUnfolder]: 64841/85226 cut-off events. [2023-08-29 23:41:28,833 INFO L131 PetriNetUnfolder]: For 5216/5222 co-relation queries the response was YES. [2023-08-29 23:41:29,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169617 conditions, 85226 events. 64841/85226 cut-off events. For 5216/5222 co-relation queries the response was YES. Maximal size of possible extension queue 3413. Compared 468250 event pairs, 50886 based on Foata normal form. 248/34137 useless extension candidates. Maximal degree in co-relation 169589. Up to 79263 conditions per place. [2023-08-29 23:41:29,316 INFO L137 encePairwiseOnDemand]: 604/607 looper letters, 72 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2023-08-29 23:41:29,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 137 transitions, 822 flow [2023-08-29 23:41:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:41:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:41:29,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2023-08-29 23:41:29,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4887424492037342 [2023-08-29 23:41:29,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2023-08-29 23:41:29,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2023-08-29 23:41:29,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:29,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2023-08-29 23:41:29,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:29,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:29,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:29,322 INFO L175 Difference]: Start difference. First operand has 126 places, 139 transitions, 680 flow. Second operand 3 states and 890 transitions. [2023-08-29 23:41:29,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 137 transitions, 822 flow [2023-08-29 23:41:29,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 137 transitions, 806 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:41:29,335 INFO L231 Difference]: Finished difference. Result has 124 places, 137 transitions, 662 flow [2023-08-29 23:41:29,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=662, PETRI_PLACES=124, PETRI_TRANSITIONS=137} [2023-08-29 23:41:29,336 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 18 predicate places. [2023-08-29 23:41:29,336 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 137 transitions, 662 flow [2023-08-29 23:41:29,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:29,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:29,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:29,357 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 (9)] Ended with exit code 0 [2023-08-29 23:41:29,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:29,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:29,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:29,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1170462127, now seen corresponding path program 1 times [2023-08-29 23:41:29,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:29,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839285028] [2023-08-29 23:41:29,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:29,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:29,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:29,563 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:29,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:41:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:29,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:41:29,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:29,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:41:29,651 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:41:29,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:41:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:29,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:29,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:29,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839285028] [2023-08-29 23:41:29,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839285028] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:29,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:29,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:41:29,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238006579] [2023-08-29 23:41:29,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:29,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:41:29,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:29,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:41:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:41:29,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 607 [2023-08-29 23:41:29,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 137 transitions, 662 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:29,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:29,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 607 [2023-08-29 23:41:29,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:35,057 INFO L130 PetriNetUnfolder]: 53592/71286 cut-off events. [2023-08-29 23:41:35,057 INFO L131 PetriNetUnfolder]: For 5236/5240 co-relation queries the response was YES. [2023-08-29 23:41:35,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142570 conditions, 71286 events. 53592/71286 cut-off events. For 5236/5240 co-relation queries the response was YES. Maximal size of possible extension queue 2576. Compared 391924 event pairs, 35084 based on Foata normal form. 0/30194 useless extension candidates. Maximal degree in co-relation 142542. Up to 58421 conditions per place. [2023-08-29 23:41:35,415 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 112 selfloop transitions, 19 changer transitions 0/180 dead transitions. [2023-08-29 23:41:35,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 180 transitions, 1034 flow [2023-08-29 23:41:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:41:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:41:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-29 23:41:35,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975288303130148 [2023-08-29 23:41:35,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-29 23:41:35,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-29 23:41:35,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:35,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-29 23:41:35,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:35,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:35,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:35,421 INFO L175 Difference]: Start difference. First operand has 124 places, 137 transitions, 662 flow. Second operand 3 states and 906 transitions. [2023-08-29 23:41:35,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 180 transitions, 1034 flow [2023-08-29 23:41:35,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 180 transitions, 1033 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:41:35,427 INFO L231 Difference]: Finished difference. Result has 127 places, 142 transitions, 770 flow [2023-08-29 23:41:35,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=770, PETRI_PLACES=127, PETRI_TRANSITIONS=142} [2023-08-29 23:41:35,428 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 21 predicate places. [2023-08-29 23:41:35,428 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 770 flow [2023-08-29 23:41:35,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:35,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:35,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:35,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:35,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:35,635 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:35,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1170462128, now seen corresponding path program 1 times [2023-08-29 23:41:35,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:35,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769877419] [2023-08-29 23:41:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:35,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:35,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:35,636 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:35,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:41:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:41:35,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:35,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 23:41:35,734 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 23:41:35,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:41:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:35,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:35,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:35,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769877419] [2023-08-29 23:41:35,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769877419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:35,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:35,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:41:35,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162090263] [2023-08-29 23:41:35,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:35,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:41:35,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:35,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:41:35,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:41:35,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 607 [2023-08-29 23:41:35,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 142 transitions, 770 flow. Second operand has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:35,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:35,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 607 [2023-08-29 23:41:35,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:39,931 INFO L130 PetriNetUnfolder]: 39663/53555 cut-off events. [2023-08-29 23:41:39,931 INFO L131 PetriNetUnfolder]: For 11848/11848 co-relation queries the response was YES. [2023-08-29 23:41:40,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112133 conditions, 53555 events. 39663/53555 cut-off events. For 11848/11848 co-relation queries the response was YES. Maximal size of possible extension queue 1726. Compared 293806 event pairs, 29791 based on Foata normal form. 2922/27474 useless extension candidates. Maximal degree in co-relation 112104. Up to 45471 conditions per place. [2023-08-29 23:41:40,226 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 99 selfloop transitions, 15 changer transitions 0/165 dead transitions. [2023-08-29 23:41:40,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 165 transitions, 1065 flow [2023-08-29 23:41:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:41:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:41:40,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2023-08-29 23:41:40,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035694673256452 [2023-08-29 23:41:40,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2023-08-29 23:41:40,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2023-08-29 23:41:40,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:40,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2023-08-29 23:41:40,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:40,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:40,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:40,231 INFO L175 Difference]: Start difference. First operand has 127 places, 142 transitions, 770 flow. Second operand 3 states and 917 transitions. [2023-08-29 23:41:40,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 165 transitions, 1065 flow [2023-08-29 23:41:40,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 165 transitions, 1027 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:41:40,246 INFO L231 Difference]: Finished difference. Result has 125 places, 140 transitions, 758 flow [2023-08-29 23:41:40,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=758, PETRI_PLACES=125, PETRI_TRANSITIONS=140} [2023-08-29 23:41:40,246 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 19 predicate places. [2023-08-29 23:41:40,246 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 140 transitions, 758 flow [2023-08-29 23:41:40,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:40,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:40,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:40,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:40,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:40,449 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:40,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:40,449 INFO L85 PathProgramCache]: Analyzing trace with hash -467289919, now seen corresponding path program 1 times [2023-08-29 23:41:40,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:40,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086236138] [2023-08-29 23:41:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:40,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:40,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:40,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:40,451 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 (12)] Waiting until timeout for monitored process [2023-08-29 23:41:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:40,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:41:40,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:40,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:40,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:40,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086236138] [2023-08-29 23:41:40,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086236138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:40,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:40,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:41:40,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050491310] [2023-08-29 23:41:40,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:40,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:41:40,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:40,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:41:40,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:41:40,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 607 [2023-08-29 23:41:40,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 140 transitions, 758 flow. Second operand has 4 states, 4 states have (on average 279.25) internal successors, (1117), 4 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:40,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:40,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 607 [2023-08-29 23:41:40,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:45,865 INFO L130 PetriNetUnfolder]: 49896/67216 cut-off events. [2023-08-29 23:41:45,866 INFO L131 PetriNetUnfolder]: For 10959/10966 co-relation queries the response was YES. [2023-08-29 23:41:46,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139796 conditions, 67216 events. 49896/67216 cut-off events. For 10959/10966 co-relation queries the response was YES. Maximal size of possible extension queue 2087. Compared 378566 event pairs, 38655 based on Foata normal form. 122/32321 useless extension candidates. Maximal degree in co-relation 139767. Up to 48823 conditions per place. [2023-08-29 23:41:46,259 INFO L137 encePairwiseOnDemand]: 597/607 looper letters, 113 selfloop transitions, 3 changer transitions 0/180 dead transitions. [2023-08-29 23:41:46,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 180 transitions, 1118 flow [2023-08-29 23:41:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:41:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:41:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1210 transitions. [2023-08-29 23:41:46,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49835255354200986 [2023-08-29 23:41:46,262 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1210 transitions. [2023-08-29 23:41:46,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1210 transitions. [2023-08-29 23:41:46,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:46,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1210 transitions. [2023-08-29 23:41:46,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 302.5) internal successors, (1210), 4 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:46,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:46,266 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:46,266 INFO L175 Difference]: Start difference. First operand has 125 places, 140 transitions, 758 flow. Second operand 4 states and 1210 transitions. [2023-08-29 23:41:46,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 180 transitions, 1118 flow [2023-08-29 23:41:46,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 180 transitions, 1088 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:41:46,276 INFO L231 Difference]: Finished difference. Result has 128 places, 141 transitions, 764 flow [2023-08-29 23:41:46,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=764, PETRI_PLACES=128, PETRI_TRANSITIONS=141} [2023-08-29 23:41:46,277 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 22 predicate places. [2023-08-29 23:41:46,277 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 141 transitions, 764 flow [2023-08-29 23:41:46,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 279.25) internal successors, (1117), 4 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:46,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:46,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:46,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-08-29 23:41:46,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:46,484 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:46,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:46,484 INFO L85 PathProgramCache]: Analyzing trace with hash -175700522, now seen corresponding path program 1 times [2023-08-29 23:41:46,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:46,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179064498] [2023-08-29 23:41:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:46,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:46,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:46,486 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:46,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:41:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:46,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:41:46,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:46,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:41:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:46,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:46,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179064498] [2023-08-29 23:41:46,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179064498] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:41:46,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:41:46,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:41:46,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712504821] [2023-08-29 23:41:46,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:41:46,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:41:46,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:46,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:41:46,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:41:46,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 607 [2023-08-29 23:41:46,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 141 transitions, 764 flow. Second operand has 8 states, 8 states have (on average 275.5) internal successors, (2204), 8 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:46,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:46,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 607 [2023-08-29 23:41:46,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:54,269 INFO L130 PetriNetUnfolder]: 64257/87523 cut-off events. [2023-08-29 23:41:54,269 INFO L131 PetriNetUnfolder]: For 18900/18909 co-relation queries the response was YES. [2023-08-29 23:41:54,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192278 conditions, 87523 events. 64257/87523 cut-off events. For 18900/18909 co-relation queries the response was YES. Maximal size of possible extension queue 2402. Compared 520945 event pairs, 48344 based on Foata normal form. 1894/48764 useless extension candidates. Maximal degree in co-relation 192246. Up to 43781 conditions per place. [2023-08-29 23:41:54,760 INFO L137 encePairwiseOnDemand]: 596/607 looper letters, 180 selfloop transitions, 13 changer transitions 0/257 dead transitions. [2023-08-29 23:41:54,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 257 transitions, 1532 flow [2023-08-29 23:41:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:41:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:41:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2632 transitions. [2023-08-29 23:41:54,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48178656415888704 [2023-08-29 23:41:54,764 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2632 transitions. [2023-08-29 23:41:54,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2632 transitions. [2023-08-29 23:41:54,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:54,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2632 transitions. [2023-08-29 23:41:54,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 292.44444444444446) internal successors, (2632), 9 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:54,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 607.0) internal successors, (6070), 10 states have internal predecessors, (6070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:54,772 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 607.0) internal successors, (6070), 10 states have internal predecessors, (6070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:54,772 INFO L175 Difference]: Start difference. First operand has 128 places, 141 transitions, 764 flow. Second operand 9 states and 2632 transitions. [2023-08-29 23:41:54,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 257 transitions, 1532 flow [2023-08-29 23:41:54,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 257 transitions, 1524 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-29 23:41:54,786 INFO L231 Difference]: Finished difference. Result has 137 places, 145 transitions, 843 flow [2023-08-29 23:41:54,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=843, PETRI_PLACES=137, PETRI_TRANSITIONS=145} [2023-08-29 23:41:54,787 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 31 predicate places. [2023-08-29 23:41:54,787 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 145 transitions, 843 flow [2023-08-29 23:41:54,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 275.5) internal successors, (2204), 8 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:54,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:54,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:54,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-08-29 23:41:54,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:54,994 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:41:54,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:54,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1905922592, now seen corresponding path program 1 times [2023-08-29 23:41:54,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:54,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747650871] [2023-08-29 23:41:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:54,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:41:54,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:54,996 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:41:54,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:41:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:41:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:55,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 23:41:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:55,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:41:55,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747650871] [2023-08-29 23:41:55,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747650871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:41:55,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:41:55,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:41:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272537495] [2023-08-29 23:41:55,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:41:55,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:41:55,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:55,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:41:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:41:55,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 607 [2023-08-29 23:41:55,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 145 transitions, 843 flow. Second operand has 3 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:55,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:55,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 607 [2023-08-29 23:41:55,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:42:02,164 INFO L130 PetriNetUnfolder]: 65047/88660 cut-off events. [2023-08-29 23:42:02,164 INFO L131 PetriNetUnfolder]: For 27175/27189 co-relation queries the response was YES. [2023-08-29 23:42:02,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206257 conditions, 88660 events. 65047/88660 cut-off events. For 27175/27189 co-relation queries the response was YES. Maximal size of possible extension queue 2345. Compared 528657 event pairs, 49577 based on Foata normal form. 2701/50664 useless extension candidates. Maximal degree in co-relation 206222. Up to 72517 conditions per place. [2023-08-29 23:42:02,670 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 106 selfloop transitions, 5 changer transitions 0/170 dead transitions. [2023-08-29 23:42:02,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 170 transitions, 1147 flow [2023-08-29 23:42:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:42:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:42:02,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2023-08-29 23:42:02,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035694673256452 [2023-08-29 23:42:02,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2023-08-29 23:42:02,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2023-08-29 23:42:02,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:42:02,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2023-08-29 23:42:02,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:02,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:02,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:02,676 INFO L175 Difference]: Start difference. First operand has 137 places, 145 transitions, 843 flow. Second operand 3 states and 917 transitions. [2023-08-29 23:42:02,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 170 transitions, 1147 flow [2023-08-29 23:42:02,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 170 transitions, 1125 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-29 23:42:02,698 INFO L231 Difference]: Finished difference. Result has 134 places, 143 transitions, 827 flow [2023-08-29 23:42:02,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=827, PETRI_PLACES=134, PETRI_TRANSITIONS=143} [2023-08-29 23:42:02,698 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 28 predicate places. [2023-08-29 23:42:02,699 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 143 transitions, 827 flow [2023-08-29 23:42:02,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:02,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:42:02,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:42:02,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 23:42:02,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:42:02,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:42:02,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:42:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1905922591, now seen corresponding path program 1 times [2023-08-29 23:42:02,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:42:02,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864190448] [2023-08-29 23:42:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:42:02,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:42:02,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:42:02,901 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:42:02,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 23:42:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:42:02,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:42:02,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:42:02,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:42:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:42:02,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:42:02,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:42:02,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864190448] [2023-08-29 23:42:02,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864190448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:42:02,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:42:02,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:42:02,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707096771] [2023-08-29 23:42:02,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:42:02,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:42:02,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:42:02,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:42:02,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:42:03,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 607 [2023-08-29 23:42:03,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 143 transitions, 827 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:03,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:42:03,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 607 [2023-08-29 23:42:03,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:42:10,975 INFO L130 PetriNetUnfolder]: 77023/105269 cut-off events. [2023-08-29 23:42:10,976 INFO L131 PetriNetUnfolder]: For 34559/34581 co-relation queries the response was YES. [2023-08-29 23:42:11,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244777 conditions, 105269 events. 77023/105269 cut-off events. For 34559/34581 co-relation queries the response was YES. Maximal size of possible extension queue 2663. Compared 645724 event pairs, 50102 based on Foata normal form. 9/58771 useless extension candidates. Maximal degree in co-relation 244744. Up to 80058 conditions per place. [2023-08-29 23:42:11,603 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 120 selfloop transitions, 14 changer transitions 0/189 dead transitions. [2023-08-29 23:42:11,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 189 transitions, 1262 flow [2023-08-29 23:42:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:42:11,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:42:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2023-08-29 23:42:11,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986271279516749 [2023-08-29 23:42:11,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2023-08-29 23:42:11,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2023-08-29 23:42:11,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:42:11,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2023-08-29 23:42:11,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:11,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:11,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:11,608 INFO L175 Difference]: Start difference. First operand has 134 places, 143 transitions, 827 flow. Second operand 3 states and 908 transitions. [2023-08-29 23:42:11,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 189 transitions, 1262 flow [2023-08-29 23:42:11,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 1252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:42:11,648 INFO L231 Difference]: Finished difference. Result has 136 places, 150 transitions, 937 flow [2023-08-29 23:42:11,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=937, PETRI_PLACES=136, PETRI_TRANSITIONS=150} [2023-08-29 23:42:11,649 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 30 predicate places. [2023-08-29 23:42:11,649 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 150 transitions, 937 flow [2023-08-29 23:42:11,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:11,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:42:11,650 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:42:11,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-08-29 23:42:11,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:42:11,856 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:42:11,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:42:11,857 INFO L85 PathProgramCache]: Analyzing trace with hash 273636192, now seen corresponding path program 1 times [2023-08-29 23:42:11,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:42:11,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998549761] [2023-08-29 23:42:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:42:11,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:42:11,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:42:11,858 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:42:11,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 23:42:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:42:11,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:42:11,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:42:12,013 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:42:12,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:42:12,040 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:42:12,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 23:42:12,067 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:42:12,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:42:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:42:12,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:42:12,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:42:12,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998549761] [2023-08-29 23:42:12,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998549761] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:42:12,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:42:12,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:42:12,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812732177] [2023-08-29 23:42:12,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:42:12,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:42:12,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:42:12,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:42:12,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:42:12,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 607 [2023-08-29 23:42:12,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 937 flow. Second operand has 4 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:12,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:42:12,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 607 [2023-08-29 23:42:12,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:42:17,436 INFO L130 PetriNetUnfolder]: 45092/64243 cut-off events. [2023-08-29 23:42:17,437 INFO L131 PetriNetUnfolder]: For 33957/33962 co-relation queries the response was YES. [2023-08-29 23:42:17,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153720 conditions, 64243 events. 45092/64243 cut-off events. For 33957/33962 co-relation queries the response was YES. Maximal size of possible extension queue 1755. Compared 403512 event pairs, 22390 based on Foata normal form. 0/39007 useless extension candidates. Maximal degree in co-relation 153686. Up to 31405 conditions per place. [2023-08-29 23:42:17,817 INFO L137 encePairwiseOnDemand]: 593/607 looper letters, 139 selfloop transitions, 27 changer transitions 0/230 dead transitions. [2023-08-29 23:42:17,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 230 transitions, 1578 flow [2023-08-29 23:42:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:42:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:42:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1474 transitions. [2023-08-29 23:42:17,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485667215815486 [2023-08-29 23:42:17,819 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1474 transitions. [2023-08-29 23:42:17,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1474 transitions. [2023-08-29 23:42:17,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:42:17,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1474 transitions. [2023-08-29 23:42:17,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:17,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:17,824 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:17,824 INFO L175 Difference]: Start difference. First operand has 136 places, 150 transitions, 937 flow. Second operand 5 states and 1474 transitions. [2023-08-29 23:42:17,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 230 transitions, 1578 flow [2023-08-29 23:42:17,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 230 transitions, 1542 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:42:17,849 INFO L231 Difference]: Finished difference. Result has 141 places, 165 transitions, 1163 flow [2023-08-29 23:42:17,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1163, PETRI_PLACES=141, PETRI_TRANSITIONS=165} [2023-08-29 23:42:17,850 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 35 predicate places. [2023-08-29 23:42:17,850 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 165 transitions, 1163 flow [2023-08-29 23:42:17,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:17,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:42:17,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:42:17,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-29 23:42:18,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:42:18,060 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:42:18,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:42:18,061 INFO L85 PathProgramCache]: Analyzing trace with hash 273636193, now seen corresponding path program 2 times [2023-08-29 23:42:18,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:42:18,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132852982] [2023-08-29 23:42:18,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:42:18,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:42:18,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:42:18,062 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:42:18,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 23:42:18,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:42:18,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:42:18,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-29 23:42:18,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:42:18,224 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2023-08-29 23:42:18,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2023-08-29 23:42:18,265 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:42:18,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:42:18,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:42:18,572 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 16 treesize of output 18 [2023-08-29 23:42:18,584 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:42:18,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:42:18,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:42:18,618 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 16 treesize of output 18 [2023-08-29 23:42:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:42:18,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:42:18,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:42:18,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132852982] [2023-08-29 23:42:18,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132852982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:42:18,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:42:18,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:42:18,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011407815] [2023-08-29 23:42:18,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:42:18,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:42:18,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:42:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:42:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:42:20,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 607 [2023-08-29 23:42:20,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 165 transitions, 1163 flow. Second operand has 6 states, 6 states have (on average 260.3333333333333) internal successors, (1562), 6 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:20,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:42:20,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 607 [2023-08-29 23:42:20,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:42:27,820 INFO L130 PetriNetUnfolder]: 60539/84592 cut-off events. [2023-08-29 23:42:27,821 INFO L131 PetriNetUnfolder]: For 89707/90009 co-relation queries the response was YES. [2023-08-29 23:42:28,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230260 conditions, 84592 events. 60539/84592 cut-off events. For 89707/90009 co-relation queries the response was YES. Maximal size of possible extension queue 2234. Compared 530552 event pairs, 20680 based on Foata normal form. 1404/65923 useless extension candidates. Maximal degree in co-relation 230222. Up to 24701 conditions per place. [2023-08-29 23:42:28,338 INFO L137 encePairwiseOnDemand]: 592/607 looper letters, 243 selfloop transitions, 46 changer transitions 0/321 dead transitions. [2023-08-29 23:42:28,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 321 transitions, 2413 flow [2023-08-29 23:42:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:42:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:42:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2021 transitions. [2023-08-29 23:42:28,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47564132737114617 [2023-08-29 23:42:28,343 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2021 transitions. [2023-08-29 23:42:28,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2021 transitions. [2023-08-29 23:42:28,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:42:28,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2021 transitions. [2023-08-29 23:42:28,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 288.7142857142857) internal successors, (2021), 7 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:28,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:28,349 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:28,349 INFO L175 Difference]: Start difference. First operand has 141 places, 165 transitions, 1163 flow. Second operand 7 states and 2021 transitions. [2023-08-29 23:42:28,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 321 transitions, 2413 flow [2023-08-29 23:42:28,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 321 transitions, 2384 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-29 23:42:28,406 INFO L231 Difference]: Finished difference. Result has 148 places, 179 transitions, 1445 flow [2023-08-29 23:42:28,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1445, PETRI_PLACES=148, PETRI_TRANSITIONS=179} [2023-08-29 23:42:28,406 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 42 predicate places. [2023-08-29 23:42:28,406 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 179 transitions, 1445 flow [2023-08-29 23:42:28,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 260.3333333333333) internal successors, (1562), 6 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:28,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:42:28,407 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 23:42:28,414 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 (17)] Ended with exit code 0 [2023-08-29 23:42:28,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:42:28,614 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:42:28,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:42:28,615 INFO L85 PathProgramCache]: Analyzing trace with hash 893811226, now seen corresponding path program 3 times [2023-08-29 23:42:28,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:42:28,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315501349] [2023-08-29 23:42:28,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:42:28,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:42:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:42:28,616 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:42:28,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 23:42:28,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 23:42:28,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:42:28,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:42:28,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:42:28,797 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:42:28,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:42:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:42:29,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:42:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:42:30,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:42:30,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315501349] [2023-08-29 23:42:30,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315501349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:42:30,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:42:30,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:42:30,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239643497] [2023-08-29 23:42:30,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:42:30,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:42:30,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:42:30,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:42:30,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:42:46,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-08-29 23:42:46,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 179 transitions, 1445 flow. Second operand has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:46,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:42:46,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-08-29 23:42:46,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:43:11,994 INFO L130 PetriNetUnfolder]: 60608/85908 cut-off events. [2023-08-29 23:43:11,994 INFO L131 PetriNetUnfolder]: For 151209/151327 co-relation queries the response was YES. [2023-08-29 23:43:12,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248873 conditions, 85908 events. 60608/85908 cut-off events. For 151209/151327 co-relation queries the response was YES. Maximal size of possible extension queue 2208. Compared 555893 event pairs, 41564 based on Foata normal form. 12/65124 useless extension candidates. Maximal degree in co-relation 248832. Up to 78979 conditions per place. [2023-08-29 23:43:12,530 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 217 selfloop transitions, 80 changer transitions 0/329 dead transitions. [2023-08-29 23:43:12,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 329 transitions, 3013 flow [2023-08-29 23:43:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-29 23:43:12,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-29 23:43:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7278 transitions. [2023-08-29 23:43:12,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46115828158661765 [2023-08-29 23:43:12,541 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7278 transitions. [2023-08-29 23:43:12,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7278 transitions. [2023-08-29 23:43:12,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:43:12,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7278 transitions. [2023-08-29 23:43:12,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 279.9230769230769) internal successors, (7278), 26 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:12,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 607.0) internal successors, (16389), 27 states have internal predecessors, (16389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:12,559 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 607.0) internal successors, (16389), 27 states have internal predecessors, (16389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:12,559 INFO L175 Difference]: Start difference. First operand has 148 places, 179 transitions, 1445 flow. Second operand 26 states and 7278 transitions. [2023-08-29 23:43:12,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 329 transitions, 3013 flow [2023-08-29 23:43:13,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 329 transitions, 3006 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:43:13,092 INFO L231 Difference]: Finished difference. Result has 186 places, 220 transitions, 2229 flow [2023-08-29 23:43:13,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2229, PETRI_PLACES=186, PETRI_TRANSITIONS=220} [2023-08-29 23:43:13,092 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 80 predicate places. [2023-08-29 23:43:13,092 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 220 transitions, 2229 flow [2023-08-29 23:43:13,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:13,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:43:13,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:43:13,101 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 (18)] Ended with exit code 0 [2023-08-29 23:43:13,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:43:13,301 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:43:13,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:43:13,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1114389204, now seen corresponding path program 1 times [2023-08-29 23:43:13,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:43:13,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995065580] [2023-08-29 23:43:13,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:43:13,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:43:13,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:43:13,302 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:43:13,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 23:43:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:43:13,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:43:13,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:43:13,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:43:13,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 23:43:13,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:43:13,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:43:13,431 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:43:13,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:43:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:43:13,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:43:13,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:43:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995065580] [2023-08-29 23:43:13,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995065580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:43:13,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:43:13,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:43:13,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780744123] [2023-08-29 23:43:13,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:43:13,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:43:13,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:43:13,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:43:13,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:43:13,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 607 [2023-08-29 23:43:13,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 220 transitions, 2229 flow. Second operand has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:13,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:43:13,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 607 [2023-08-29 23:43:13,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:43:20,698 INFO L130 PetriNetUnfolder]: 46156/70087 cut-off events. [2023-08-29 23:43:20,698 INFO L131 PetriNetUnfolder]: For 125540/125666 co-relation queries the response was YES. [2023-08-29 23:43:21,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202768 conditions, 70087 events. 46156/70087 cut-off events. For 125540/125666 co-relation queries the response was YES. Maximal size of possible extension queue 2132. Compared 508806 event pairs, 13866 based on Foata normal form. 6/56076 useless extension candidates. Maximal degree in co-relation 202712. Up to 37512 conditions per place. [2023-08-29 23:43:21,264 INFO L137 encePairwiseOnDemand]: 597/607 looper letters, 164 selfloop transitions, 53 changer transitions 0/280 dead transitions. [2023-08-29 23:43:21,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 280 transitions, 3040 flow [2023-08-29 23:43:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:43:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:43:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1166 transitions. [2023-08-29 23:43:21,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802306425041186 [2023-08-29 23:43:21,266 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1166 transitions. [2023-08-29 23:43:21,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1166 transitions. [2023-08-29 23:43:21,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:43:21,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1166 transitions. [2023-08-29 23:43:21,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.5) internal successors, (1166), 4 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:21,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:21,269 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:21,269 INFO L175 Difference]: Start difference. First operand has 186 places, 220 transitions, 2229 flow. Second operand 4 states and 1166 transitions. [2023-08-29 23:43:21,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 280 transitions, 3040 flow [2023-08-29 23:43:21,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 280 transitions, 2952 flow, removed 23 selfloop flow, removed 10 redundant places. [2023-08-29 23:43:21,712 INFO L231 Difference]: Finished difference. Result has 179 places, 233 transitions, 2492 flow [2023-08-29 23:43:21,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2492, PETRI_PLACES=179, PETRI_TRANSITIONS=233} [2023-08-29 23:43:21,713 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 73 predicate places. [2023-08-29 23:43:21,713 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 233 transitions, 2492 flow [2023-08-29 23:43:21,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:21,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:43:21,713 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:43:21,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-29 23:43:21,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:43:21,913 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:43:21,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:43:21,914 INFO L85 PathProgramCache]: Analyzing trace with hash -107211231, now seen corresponding path program 1 times [2023-08-29 23:43:21,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:43:21,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028299732] [2023-08-29 23:43:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:43:21,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:43:21,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:43:21,915 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:43:21,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 23:43:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:43:22,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:43:22,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:43:22,073 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 23:43:22,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 23:43:22,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-29 23:43:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:43:22,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:43:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:43:22,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:43:22,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028299732] [2023-08-29 23:43:22,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028299732] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:43:22,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:43:22,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:43:22,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752734407] [2023-08-29 23:43:22,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:43:22,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:43:22,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:43:22,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:43:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:43:24,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 607 [2023-08-29 23:43:24,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 233 transitions, 2492 flow. Second operand has 12 states, 12 states have (on average 266.6666666666667) internal successors, (3200), 12 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:24,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:43:24,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 607 [2023-08-29 23:43:24,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:43:36,080 INFO L130 PetriNetUnfolder]: 63587/94949 cut-off events. [2023-08-29 23:43:36,080 INFO L131 PetriNetUnfolder]: For 220876/221408 co-relation queries the response was YES. [2023-08-29 23:43:36,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290697 conditions, 94949 events. 63587/94949 cut-off events. For 220876/221408 co-relation queries the response was YES. Maximal size of possible extension queue 2908. Compared 694763 event pairs, 32584 based on Foata normal form. 3003/80408 useless extension candidates. Maximal degree in co-relation 290639. Up to 23584 conditions per place. [2023-08-29 23:43:36,902 INFO L137 encePairwiseOnDemand]: 592/607 looper letters, 398 selfloop transitions, 36 changer transitions 0/466 dead transitions. [2023-08-29 23:43:36,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 466 transitions, 4907 flow [2023-08-29 23:43:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 23:43:36,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 23:43:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3682 transitions. [2023-08-29 23:43:36,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666075275630465 [2023-08-29 23:43:36,906 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3682 transitions. [2023-08-29 23:43:36,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3682 transitions. [2023-08-29 23:43:36,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:43:36,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3682 transitions. [2023-08-29 23:43:36,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 283.2307692307692) internal successors, (3682), 13 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:36,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 607.0) internal successors, (8498), 14 states have internal predecessors, (8498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:36,913 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 607.0) internal successors, (8498), 14 states have internal predecessors, (8498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:36,913 INFO L175 Difference]: Start difference. First operand has 179 places, 233 transitions, 2492 flow. Second operand 13 states and 3682 transitions. [2023-08-29 23:43:36,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 466 transitions, 4907 flow [2023-08-29 23:43:37,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 466 transitions, 4824 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 23:43:37,702 INFO L231 Difference]: Finished difference. Result has 194 places, 251 transitions, 2866 flow [2023-08-29 23:43:37,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2866, PETRI_PLACES=194, PETRI_TRANSITIONS=251} [2023-08-29 23:43:37,703 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 88 predicate places. [2023-08-29 23:43:37,703 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 251 transitions, 2866 flow [2023-08-29 23:43:37,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 266.6666666666667) internal successors, (3200), 12 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:37,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:43:37,703 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:43:37,710 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 (20)] Ended with exit code 0 [2023-08-29 23:43:37,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:43:37,904 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-29 23:43:37,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:43:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2086325012, now seen corresponding path program 2 times [2023-08-29 23:43:37,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:43:37,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514192173] [2023-08-29 23:43:37,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:43:37,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:43:37,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:43:37,906 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:43:37,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 23:43:38,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:43:38,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:43:38,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 23:43:38,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:43:38,074 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 23:43:38,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 23:43:38,107 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 23:43:38,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 23:43:38,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:43:38,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:43:38,217 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:43:38,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:43:38,245 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 23:43:38,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-29 23:43:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:43:38,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:43:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:43:45,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:43:45,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514192173] [2023-08-29 23:43:45,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514192173] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:43:45,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:43:45,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-29 23:43:45,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006691902] [2023-08-29 23:43:45,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:43:45,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:43:45,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:43:45,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:43:45,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2023-08-29 23:43:48,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:50,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:52,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:55,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:43:57,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:44:00,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:02,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:04,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:07,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:09,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:11,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:13,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:15,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:17,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:19,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:22,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:24,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:26,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:28,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:31,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:44:33,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:35,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:37,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:40,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:44,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:46,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:48,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:51,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:44:53,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:56,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:44:58,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-29 23:45:00,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:02,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:05,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:07,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:10,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:13,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:16,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:18,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:20,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:23,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:25,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:28,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:30,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:32,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:34,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:37,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:39,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:41,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:44,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:46,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:49,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:51,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:53,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:56,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:45:58,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:01,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:46:01,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 607 [2023-08-29 23:46:01,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 251 transitions, 2866 flow. Second operand has 18 states, 18 states have (on average 201.33333333333334) internal successors, (3624), 18 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:01,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:46:01,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 607 [2023-08-29 23:46:01,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand