./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons-eq.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/popl20-prod-cons-eq.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 29fee1864b0d56497c32cb33e6aaa24ed5707e21c5b89ec418c6707c5ac52336 --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 [2023-08-30 00:50:16,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:50:16,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:50:17,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:50:17,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:50:17,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:50:17,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:50:17,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:50:17,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:50:17,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:50:17,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:50:17,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:50:17,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:50:17,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:50:17,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:50:17,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:50:17,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:50:17,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:50:17,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:50:17,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:50:17,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:50:17,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:50:17,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:50:17,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:50:17,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:50:17,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:50:17,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:50:17,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:50:17,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:50:17,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:50:17,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:50:17,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:50:17,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:50:17,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:50:17,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:50:17,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:50:17,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:50:17,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:50:17,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:50:17,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:50:17,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:50:17,070 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:50:17,100 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:50:17,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:50:17,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:50:17,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:50:17,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:50:17,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:50:17,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:50:17,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:50:17,104 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:50:17,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:50:17,105 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:50:17,105 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:50:17,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:50:17,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:50:17,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:50:17,106 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:50:17,106 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:50:17,106 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:50:17,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:50:17,106 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:50:17,107 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:50:17,107 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:50:17,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:50:17,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:50:17,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:50:17,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:50:17,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:50:17,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:50:17,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:50:17,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:50:17,109 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:50:17,109 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:50:17,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:50:17,109 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:50:17,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29fee1864b0d56497c32cb33e6aaa24ed5707e21c5b89ec418c6707c5ac52336 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:50:17,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:50:17,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:50:17,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:50:17,455 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:50:17,455 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:50:17,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons-eq.wvr.c [2023-08-30 00:50:18,664 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:50:18,877 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:50:18,877 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons-eq.wvr.c [2023-08-30 00:50:18,884 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b31099fd/8449c842acc84ab095f83d8ebf3311c3/FLAG2e0095c34 [2023-08-30 00:50:18,894 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b31099fd/8449c842acc84ab095f83d8ebf3311c3 [2023-08-30 00:50:18,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:50:18,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:50:18,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:18,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:50:18,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:50:18,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:18" (1/1) ... [2023-08-30 00:50:18,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63182fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:18, skipping insertion in model container [2023-08-30 00:50:18,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:18" (1/1) ... [2023-08-30 00:50:18,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:50:18,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:50:19,153 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons-eq.wvr.c[4380,4393] [2023-08-30 00:50:19,170 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:19,188 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:50:19,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b1a5f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:19, skipping insertion in model container [2023-08-30 00:50:19,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:19,190 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:50:19,192 INFO L158 Benchmark]: Toolchain (without parser) took 293.94ms. Allocated memory is still 81.8MB. Free memory was 59.3MB in the beginning and 48.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:50:19,193 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 62.9MB. Free memory is still 40.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:50:19,194 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.07ms. Allocated memory is still 81.8MB. Free memory was 59.3MB in the beginning and 48.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:50:19,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 62.9MB. Free memory is still 40.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.07ms. Allocated memory is still 81.8MB. Free memory was 59.3MB in the beginning and 48.9MB 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: 125]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons-eq.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 29fee1864b0d56497c32cb33e6aaa24ed5707e21c5b89ec418c6707c5ac52336 --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 [2023-08-30 00:50:20,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:50:20,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:50:20,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:50:20,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:50:20,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:50:20,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:50:20,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:50:20,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:50:20,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:50:20,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:50:20,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:50:20,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:50:20,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:50:20,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:50:20,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:50:20,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:50:20,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:50:20,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:50:20,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:50:20,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:50:20,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:50:20,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:50:20,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:50:21,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:50:21,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:50:21,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:50:21,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:50:21,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:50:21,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:50:21,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:50:21,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:50:21,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:50:21,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:50:21,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:50:21,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:50:21,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:50:21,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:50:21,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:50:21,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:50:21,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:50:21,014 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:50:21,051 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:50:21,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:50:21,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:50:21,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:50:21,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:50:21,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:50:21,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:50:21,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:50:21,054 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:50:21,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:50:21,055 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:50:21,055 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:50:21,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:50:21,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:50:21,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:50:21,056 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:50:21,056 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:50:21,056 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:50:21,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:50:21,057 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:50:21,057 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:50:21,057 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:50:21,057 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:50:21,057 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:50:21,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:50:21,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:50:21,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:50:21,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:50:21,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:50:21,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:50:21,059 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:50:21,059 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:50:21,059 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:50:21,059 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:50:21,059 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:50:21,059 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:50:21,060 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:50:21,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29fee1864b0d56497c32cb33e6aaa24ed5707e21c5b89ec418c6707c5ac52336 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:50:21,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:50:21,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:50:21,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:50:21,364 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:50:21,364 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:50:21,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons-eq.wvr.c [2023-08-30 00:50:22,573 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:50:22,787 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:50:22,788 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons-eq.wvr.c [2023-08-30 00:50:22,794 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29525d9ed/6ce6fed7fe4d43b0881db9105f69f78e/FLAGfb1252e08 [2023-08-30 00:50:22,803 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29525d9ed/6ce6fed7fe4d43b0881db9105f69f78e [2023-08-30 00:50:22,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:50:22,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:50:22,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:22,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:50:22,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:50:22,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:22" (1/1) ... [2023-08-30 00:50:22,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9e7fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:22, skipping insertion in model container [2023-08-30 00:50:22,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:50:22" (1/1) ... [2023-08-30 00:50:22,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:50:22,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:50:22,983 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons-eq.wvr.c[4380,4393] [2023-08-30 00:50:22,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:23,003 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:50:23,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:50:23,026 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons-eq.wvr.c[4380,4393] [2023-08-30 00:50:23,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:23,041 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:50:23,080 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons-eq.wvr.c[4380,4393] [2023-08-30 00:50:23,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:50:23,093 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:50:23,094 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:50:23,100 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:50:23,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23 WrapperNode [2023-08-30 00:50:23,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:50:23,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:50:23,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:50:23,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:50:23,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (1/1) ... [2023-08-30 00:50:23,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (1/1) ... [2023-08-30 00:50:23,172 INFO L138 Inliner]: procedures = 30, calls = 80, calls flagged for inlining = 26, calls inlined = 32, statements flattened = 394 [2023-08-30 00:50:23,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:50:23,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:50:23,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:50:23,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:50:23,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (1/1) ... [2023-08-30 00:50:23,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (1/1) ... [2023-08-30 00:50:23,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (1/1) ... [2023-08-30 00:50:23,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (1/1) ... [2023-08-30 00:50:23,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (1/1) ... [2023-08-30 00:50:23,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (1/1) ... [2023-08-30 00:50:23,228 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (1/1) ... [2023-08-30 00:50:23,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (1/1) ... [2023-08-30 00:50:23,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:50:23,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:50:23,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:50:23,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:50:23,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (1/1) ... [2023-08-30 00:50:23,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:50:23,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:23,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:50:23,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:50:23,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:50:23,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-08-30 00:50:23,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:50:23,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 00:50:23,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:50:23,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:50:23,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 00:50:23,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:50:23,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:50:23,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:50:23,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:50:23,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:50:23,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:50:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:50:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:50:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:50:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:50:23,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:50:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-08-30 00:50:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:50:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:50:23,300 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:50:23,478 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:50:23,480 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:50:24,298 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:50:24,523 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:50:24,523 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-30 00:50:24,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:50:24 BoogieIcfgContainer [2023-08-30 00:50:24,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:50:24,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:50:24,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:50:24,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:50:24,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:50:22" (1/3) ... [2023-08-30 00:50:24,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5522d1fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:50:24, skipping insertion in model container [2023-08-30 00:50:24,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:50:23" (2/3) ... [2023-08-30 00:50:24,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5522d1fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:50:24, skipping insertion in model container [2023-08-30 00:50:24,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:50:24" (3/3) ... [2023-08-30 00:50:24,535 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons-eq.wvr.c [2023-08-30 00:50:24,550 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:50:24,551 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2023-08-30 00:50:24,551 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:50:24,705 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:50:24,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 408 places, 435 transitions, 894 flow [2023-08-30 00:50:24,925 INFO L130 PetriNetUnfolder]: 37/432 cut-off events. [2023-08-30 00:50:24,926 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:50:24,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 432 events. 37/432 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 723 event pairs, 0 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 330. Up to 2 conditions per place. [2023-08-30 00:50:24,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 408 places, 435 transitions, 894 flow [2023-08-30 00:50:24,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 401 places, 428 transitions, 874 flow [2023-08-30 00:50:24,948 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:50:24,969 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 401 places, 428 transitions, 874 flow [2023-08-30 00:50:24,972 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 401 places, 428 transitions, 874 flow [2023-08-30 00:50:24,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 401 places, 428 transitions, 874 flow [2023-08-30 00:50:25,058 INFO L130 PetriNetUnfolder]: 37/428 cut-off events. [2023-08-30 00:50:25,058 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:50:25,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 428 events. 37/428 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 714 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 330. Up to 2 conditions per place. [2023-08-30 00:50:25,066 INFO L119 LiptonReduction]: Number of co-enabled transitions 10370 [2023-08-30 00:51:32,957 INFO L134 LiptonReduction]: Checked pairs total: 15227 [2023-08-30 00:51:32,958 INFO L136 LiptonReduction]: Total number of compositions: 510 [2023-08-30 00:51:32,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:51:32,976 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;@3e77d493, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:51:32,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 93 error locations. [2023-08-30 00:51:32,979 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:51:32,980 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:51:32,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:32,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:51:32,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-08-30 00:51:32,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash 59753, now seen corresponding path program 1 times [2023-08-30 00:51:32,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:32,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169518871] [2023-08-30 00:51:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:32,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:32,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:33,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:33,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:51:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:33,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:51:33,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:33,222 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:51:33,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:51:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:33,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:33,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:33,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169518871] [2023-08-30 00:51:33,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169518871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:33,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:33,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:33,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925515295] [2023-08-30 00:51:33,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:33,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:33,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:33,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 945 [2023-08-30 00:51:33,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 92 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:33,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:33,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 945 [2023-08-30 00:51:33,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:37,788 INFO L130 PetriNetUnfolder]: 15427/21602 cut-off events. [2023-08-30 00:51:37,789 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-08-30 00:51:37,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43548 conditions, 21602 events. 15427/21602 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 4086. Compared 155646 event pairs, 14465 based on Foata normal form. 0/4370 useless extension candidates. Maximal degree in co-relation 40680. Up to 21578 conditions per place. [2023-08-30 00:51:38,015 INFO L137 encePairwiseOnDemand]: 931/945 looper letters, 76 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-08-30 00:51:38,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 79 transitions, 330 flow [2023-08-30 00:51:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1185 transitions. [2023-08-30 00:51:38,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2023-08-30 00:51:38,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1185 transitions. [2023-08-30 00:51:38,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1185 transitions. [2023-08-30 00:51:38,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:38,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1185 transitions. [2023-08-30 00:51:38,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:38,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 945.0) internal successors, (3780), 4 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:38,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 945.0) internal successors, (3780), 4 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:38,067 INFO L175 Difference]: Start difference. First operand has 93 places, 92 transitions, 202 flow. Second operand 3 states and 1185 transitions. [2023-08-30 00:51:38,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 79 transitions, 330 flow [2023-08-30 00:51:38,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 79 transitions, 318 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:51:38,088 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 166 flow [2023-08-30 00:51:38,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=945, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2023-08-30 00:51:38,094 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -17 predicate places. [2023-08-30 00:51:38,094 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 166 flow [2023-08-30 00:51:38,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:38,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:38,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:51:38,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:38,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:38,305 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-08-30 00:51:38,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:38,305 INFO L85 PathProgramCache]: Analyzing trace with hash 59752, now seen corresponding path program 1 times [2023-08-30 00:51:38,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:38,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562469414] [2023-08-30 00:51:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:38,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:38,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:38,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:38,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:51:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:51:38,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:38,503 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:51:38,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:51:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:38,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:51:38,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:38,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562469414] [2023-08-30 00:51:38,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562469414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:51:38,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:51:38,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:51:38,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092637931] [2023-08-30 00:51:38,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:51:38,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:51:38,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:51:38,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:51:39,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 945 [2023-08-30 00:51:39,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 363.6666666666667) internal successors, (1091), 3 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:39,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:39,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 945 [2023-08-30 00:51:39,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:45,655 INFO L130 PetriNetUnfolder]: 30852/43195 cut-off events. [2023-08-30 00:51:45,656 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:51:45,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86588 conditions, 43195 events. 30852/43195 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7258. Compared 334462 event pairs, 28930 based on Foata normal form. 0/8738 useless extension candidates. Maximal degree in co-relation 86582. Up to 21580 conditions per place. [2023-08-30 00:51:45,893 INFO L137 encePairwiseOnDemand]: 932/945 looper letters, 136 selfloop transitions, 9 changer transitions 0/147 dead transitions. [2023-08-30 00:51:45,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 147 transitions, 598 flow [2023-08-30 00:51:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:51:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:51:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1238 transitions. [2023-08-30 00:51:45,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43668430335097 [2023-08-30 00:51:45,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1238 transitions. [2023-08-30 00:51:45,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1238 transitions. [2023-08-30 00:51:45,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:45,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1238 transitions. [2023-08-30 00:51:45,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 412.6666666666667) internal successors, (1238), 3 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:45,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 945.0) internal successors, (3780), 4 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:45,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 945.0) internal successors, (3780), 4 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:45,908 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 166 flow. Second operand 3 states and 1238 transitions. [2023-08-30 00:51:45,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 147 transitions, 598 flow [2023-08-30 00:51:45,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 147 transitions, 597 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:51:45,914 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 241 flow [2023-08-30 00:51:45,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=945, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2023-08-30 00:51:45,915 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -14 predicate places. [2023-08-30 00:51:45,915 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 241 flow [2023-08-30 00:51:45,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 363.6666666666667) internal successors, (1091), 3 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:45,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:45,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:51:45,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:46,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:46,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-08-30 00:51:46,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1858186, now seen corresponding path program 1 times [2023-08-30 00:51:46,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:51:46,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20847702] [2023-08-30 00:51:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:46,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:51:46,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:51:46,135 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:51:46,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:51:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:46,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:51:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:46,341 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:51:46,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:51:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:46,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:46,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:51:46,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20847702] [2023-08-30 00:51:46,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20847702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:46,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:51:46,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:51:46,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467970961] [2023-08-30 00:51:46,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:46,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:51:46,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:51:46,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:51:46,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:51:48,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 945 [2023-08-30 00:51:48,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:48,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:48,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 945 [2023-08-30 00:51:48,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:52:02,220 INFO L130 PetriNetUnfolder]: 61710/86391 cut-off events. [2023-08-30 00:52:02,221 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:52:02,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173236 conditions, 86391 events. 61710/86391 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10913. Compared 698194 event pairs, 57860 based on Foata normal form. 0/17497 useless extension candidates. Maximal degree in co-relation 173227. Up to 21579 conditions per place. [2023-08-30 00:52:02,693 INFO L137 encePairwiseOnDemand]: 928/945 looper letters, 252 selfloop transitions, 39 changer transitions 0/293 dead transitions. [2023-08-30 00:52:02,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 293 transitions, 1315 flow [2023-08-30 00:52:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:52:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:52:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2361 transitions. [2023-08-30 00:52:02,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164021164021164 [2023-08-30 00:52:02,699 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2361 transitions. [2023-08-30 00:52:02,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2361 transitions. [2023-08-30 00:52:02,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:52:02,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2361 transitions. [2023-08-30 00:52:02,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 393.5) internal successors, (2361), 6 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:02,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 945.0) internal successors, (6615), 7 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:02,720 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 945.0) internal successors, (6615), 7 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:02,720 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 241 flow. Second operand 6 states and 2361 transitions. [2023-08-30 00:52:02,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 293 transitions, 1315 flow [2023-08-30 00:52:02,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 293 transitions, 1281 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:52:02,727 INFO L231 Difference]: Finished difference. Result has 86 places, 116 transitions, 512 flow [2023-08-30 00:52:02,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=945, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=512, PETRI_PLACES=86, PETRI_TRANSITIONS=116} [2023-08-30 00:52:02,730 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -7 predicate places. [2023-08-30 00:52:02,730 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 116 transitions, 512 flow [2023-08-30 00:52:02,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:02,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:52:02,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:52:02,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:52:02,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:52:02,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-08-30 00:52:02,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:52:02,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1789108263, now seen corresponding path program 1 times [2023-08-30 00:52:02,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:52:02,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280872479] [2023-08-30 00:52:02,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:52:02,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:52:02,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:52:02,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:52:02,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:52:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:52:03,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:52:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:52:03,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 00:52:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:52:03,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:52:03,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:52:03,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280872479] [2023-08-30 00:52:03,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280872479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:52:03,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:52:03,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:52:03,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926521328] [2023-08-30 00:52:03,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:52:03,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:52:03,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:52:03,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:52:03,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:52:03,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 945 [2023-08-30 00:52:03,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 116 transitions, 512 flow. Second operand has 3 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:03,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:52:03,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 945 [2023-08-30 00:52:03,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:52:14,052 INFO L130 PetriNetUnfolder]: 61710/86390 cut-off events. [2023-08-30 00:52:14,052 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 00:52:14,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173328 conditions, 86390 events. 61710/86390 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11180. Compared 710010 event pairs, 57860 based on Foata normal form. 0/17504 useless extension candidates. Maximal degree in co-relation 173315. Up to 86265 conditions per place. [2023-08-30 00:52:14,447 INFO L137 encePairwiseOnDemand]: 943/945 looper letters, 108 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2023-08-30 00:52:14,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 115 transitions, 736 flow [2023-08-30 00:52:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:52:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:52:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1208 transitions. [2023-08-30 00:52:14,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42610229276895945 [2023-08-30 00:52:14,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1208 transitions. [2023-08-30 00:52:14,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1208 transitions. [2023-08-30 00:52:14,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:52:14,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1208 transitions. [2023-08-30 00:52:14,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 402.6666666666667) internal successors, (1208), 3 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:14,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 945.0) internal successors, (3780), 4 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:14,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 945.0) internal successors, (3780), 4 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:14,462 INFO L175 Difference]: Start difference. First operand has 86 places, 116 transitions, 512 flow. Second operand 3 states and 1208 transitions. [2023-08-30 00:52:14,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 115 transitions, 736 flow [2023-08-30 00:52:14,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 115 transitions, 689 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-08-30 00:52:14,466 INFO L231 Difference]: Finished difference. Result has 86 places, 115 transitions, 473 flow [2023-08-30 00:52:14,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=945, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=473, PETRI_PLACES=86, PETRI_TRANSITIONS=115} [2023-08-30 00:52:14,467 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -7 predicate places. [2023-08-30 00:52:14,467 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 115 transitions, 473 flow [2023-08-30 00:52:14,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:14,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:52:14,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:52:14,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:52:14,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:52:14,677 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-08-30 00:52:14,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:52:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1789108264, now seen corresponding path program 1 times [2023-08-30 00:52:14,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:52:14,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919391559] [2023-08-30 00:52:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:52:14,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:52:14,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:52:14,679 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:52:14,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:52:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:52:14,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:52:14,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:52:14,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 00:52:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:52:14,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:52:14,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:52:14,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919391559] [2023-08-30 00:52:14,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919391559] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:52:14,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:52:14,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:52:14,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408222282] [2023-08-30 00:52:14,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:52:14,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:52:14,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:52:14,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:52:14,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:52:15,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 945 [2023-08-30 00:52:15,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 115 transitions, 473 flow. Second operand has 4 states, 4 states have (on average 371.25) internal successors, (1485), 4 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:15,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:52:15,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 945 [2023-08-30 00:52:15,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:52:26,228 INFO L130 PetriNetUnfolder]: 61711/86392 cut-off events. [2023-08-30 00:52:26,228 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 00:52:26,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173313 conditions, 86392 events. 61711/86392 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 11292. Compared 710177 event pairs, 57860 based on Foata normal form. 0/17507 useless extension candidates. Maximal degree in co-relation 173300. Up to 86284 conditions per place. [2023-08-30 00:52:26,649 INFO L137 encePairwiseOnDemand]: 940/945 looper letters, 103 selfloop transitions, 12 changer transitions 0/117 dead transitions. [2023-08-30 00:52:26,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 117 transitions, 711 flow [2023-08-30 00:52:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:52:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:52:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1559 transitions. [2023-08-30 00:52:26,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41243386243386243 [2023-08-30 00:52:26,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1559 transitions. [2023-08-30 00:52:26,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1559 transitions. [2023-08-30 00:52:26,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:52:26,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1559 transitions. [2023-08-30 00:52:26,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 389.75) internal successors, (1559), 4 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:26,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 945.0) internal successors, (4725), 5 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:26,667 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 945.0) internal successors, (4725), 5 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:26,667 INFO L175 Difference]: Start difference. First operand has 86 places, 115 transitions, 473 flow. Second operand 4 states and 1559 transitions. [2023-08-30 00:52:26,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 117 transitions, 711 flow [2023-08-30 00:52:26,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 706 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:52:26,671 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 513 flow [2023-08-30 00:52:26,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=945, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=513, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2023-08-30 00:52:26,672 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -4 predicate places. [2023-08-30 00:52:26,672 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 513 flow [2023-08-30 00:52:26,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 371.25) internal successors, (1485), 4 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:26,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:52:26,674 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:52:26,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:52:26,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:52:26,883 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-08-30 00:52:26,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:52:26,883 INFO L85 PathProgramCache]: Analyzing trace with hash -471522840, now seen corresponding path program 2 times [2023-08-30 00:52:26,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:52:26,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581814886] [2023-08-30 00:52:26,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:52:26,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:52:26,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:52:26,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:52:26,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:52:27,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:52:27,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:52:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:52:27,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:52:27,117 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:52:27,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:52:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:52:27,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:52:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:52:27,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:52:27,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581814886] [2023-08-30 00:52:27,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581814886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:52:27,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:52:27,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:52:27,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972003205] [2023-08-30 00:52:27,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:52:27,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:52:27,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:52:27,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:52:27,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:52:36,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 945 [2023-08-30 00:52:36,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 513 flow. Second operand has 12 states, 12 states have (on average 348.0) internal successors, (4176), 12 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:36,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:52:36,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 945 [2023-08-30 00:52:36,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:52:40,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:41,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:42,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:43,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:45,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:47,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:48,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:51,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:52,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:55,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:56,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:52:58,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:53:04,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:53:05,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:53:06,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:53:10,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:53:46,868 INFO L130 PetriNetUnfolder]: 169682/237538 cut-off events. [2023-08-30 00:53:46,868 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2023-08-30 00:53:47,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476471 conditions, 237538 events. 169682/237538 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 13852. Compared 2004971 event pairs, 159115 based on Foata normal form. 24/48133 useless extension candidates. Maximal degree in co-relation 476457. Up to 21595 conditions per place. [2023-08-30 00:53:48,188 INFO L137 encePairwiseOnDemand]: 928/945 looper letters, 675 selfloop transitions, 88 changer transitions 0/765 dead transitions. [2023-08-30 00:53:48,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 765 transitions, 3755 flow [2023-08-30 00:53:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:53:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:53:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4947 transitions. [2023-08-30 00:53:48,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43624338624338627 [2023-08-30 00:53:48,205 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4947 transitions. [2023-08-30 00:53:48,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4947 transitions. [2023-08-30 00:53:48,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:53:48,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4947 transitions. [2023-08-30 00:53:48,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 412.25) internal successors, (4947), 12 states have internal predecessors, (4947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:53:48,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 945.0) internal successors, (12285), 13 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:53:48,236 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 945.0) internal successors, (12285), 13 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:53:48,236 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 513 flow. Second operand 12 states and 4947 transitions. [2023-08-30 00:53:48,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 765 transitions, 3755 flow [2023-08-30 00:53:48,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 765 transitions, 3714 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 00:53:48,247 INFO L231 Difference]: Finished difference. Result has 105 places, 171 transitions, 1196 flow [2023-08-30 00:53:48,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=945, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1196, PETRI_PLACES=105, PETRI_TRANSITIONS=171} [2023-08-30 00:53:48,248 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 12 predicate places. [2023-08-30 00:53:48,248 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 171 transitions, 1196 flow [2023-08-30 00:53:48,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 348.0) internal successors, (4176), 12 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:53:48,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:53:48,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:53:48,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:53:48,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:53:48,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-08-30 00:53:48,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:53:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash -372211571, now seen corresponding path program 1 times [2023-08-30 00:53:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:53:48,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700405167] [2023-08-30 00:53:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:53:48,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:53:48,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:53:48,464 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:53:48,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:53:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:53:48,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:53:48,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:53:48,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 00:53:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:53:48,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:53:48,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:53:48,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700405167] [2023-08-30 00:53:48,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700405167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:53:48,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:53:48,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:53:48,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938798071] [2023-08-30 00:53:48,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:53:48,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:53:48,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:53:48,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:53:48,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:53:49,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 945 [2023-08-30 00:53:49,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 171 transitions, 1196 flow. Second operand has 5 states, 5 states have (on average 353.2) internal successors, (1766), 5 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:53:49,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:53:49,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 945 [2023-08-30 00:53:49,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:54:36,269 INFO L130 PetriNetUnfolder]: 263283/370961 cut-off events. [2023-08-30 00:54:36,269 INFO L131 PetriNetUnfolder]: For 305/305 co-relation queries the response was YES. [2023-08-30 00:54:37,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744694 conditions, 370961 events. 263283/370961 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 20259. Compared 3355843 event pairs, 248974 based on Foata normal form. 2/79855 useless extension candidates. Maximal degree in co-relation 744672. Up to 237263 conditions per place. [2023-08-30 00:54:38,714 INFO L137 encePairwiseOnDemand]: 932/945 looper letters, 253 selfloop transitions, 26 changer transitions 0/281 dead transitions. [2023-08-30 00:54:38,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 281 transitions, 2460 flow [2023-08-30 00:54:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:54:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:54:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1906 transitions. [2023-08-30 00:54:38,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033862433862434 [2023-08-30 00:54:38,722 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1906 transitions. [2023-08-30 00:54:38,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1906 transitions. [2023-08-30 00:54:38,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:54:38,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1906 transitions. [2023-08-30 00:54:38,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 381.2) internal successors, (1906), 5 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:38,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 945.0) internal successors, (5670), 6 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:38,732 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 945.0) internal successors, (5670), 6 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:38,732 INFO L175 Difference]: Start difference. First operand has 105 places, 171 transitions, 1196 flow. Second operand 5 states and 1906 transitions. [2023-08-30 00:54:38,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 281 transitions, 2460 flow [2023-08-30 00:54:38,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 281 transitions, 2281 flow, removed 56 selfloop flow, removed 2 redundant places. [2023-08-30 00:54:38,742 INFO L231 Difference]: Finished difference. Result has 109 places, 184 transitions, 1356 flow [2023-08-30 00:54:38,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=945, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1356, PETRI_PLACES=109, PETRI_TRANSITIONS=184} [2023-08-30 00:54:38,743 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 16 predicate places. [2023-08-30 00:54:38,743 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 184 transitions, 1356 flow [2023-08-30 00:54:38,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 353.2) internal successors, (1766), 5 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:38,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:54:38,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:54:38,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:54:38,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:54:38,953 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-08-30 00:54:38,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:54:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash -372209673, now seen corresponding path program 1 times [2023-08-30 00:54:38,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:54:38,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623001672] [2023-08-30 00:54:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:54:38,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:54:38,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:54:38,955 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:54:38,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:54:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:54:39,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:54:39,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:54:39,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:39,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:39,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:39,187 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 00:54:39,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 00:54:39,223 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 00:54:39,223 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 90 treesize of output 89 [2023-08-30 00:54:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:39,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:54:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:39,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:54:39,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:39,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:54:39,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:54:39,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:54:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:54:39,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:54:39,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:54:39,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623001672] [2023-08-30 00:54:39,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623001672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:54:39,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:54:39,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:54:39,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624534419] [2023-08-30 00:54:39,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:54:39,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:54:39,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:54:39,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:54:39,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:54:40,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 945 [2023-08-30 00:54:40,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 184 transitions, 1356 flow. Second operand has 4 states, 4 states have (on average 374.5) internal successors, (1498), 4 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:40,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:54:40,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 945 [2023-08-30 00:54:40,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand