./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/unroll-4.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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:13:36,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:13:36,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:13:36,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:13:36,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:13:36,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:13:36,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:13:36,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:13:36,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:13:36,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:13:36,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:13:36,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:13:36,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:13:36,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:13:36,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:13:36,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:13:36,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:13:36,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:13:36,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:13:36,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:13:36,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:13:36,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:13:36,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:13:36,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:13:36,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:13:36,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:13:36,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:13:36,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:13:36,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:13:36,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:13:36,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:13:36,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:13:36,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:13:36,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:13:36,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:13:36,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:13:36,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:13:36,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:13:36,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:13:36,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:13:36,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:13:36,126 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 04:13:36,165 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:13:36,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:13:36,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:13:36,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:13:36,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:13:36,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:13:36,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:13:36,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:13:36,169 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:13:36,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:13:36,169 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:13:36,170 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:13:36,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:13:36,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:13:36,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:13:36,170 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:13:36,170 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:13:36,170 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:13:36,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:13:36,171 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:13:36,171 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:13:36,171 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:13:36,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:13:36,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:13:36,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:13:36,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:13:36,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:13:36,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:13:36,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:13:36,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:13:36,172 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:13:36,173 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:13:36,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:13:36,173 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:13:36,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:13:36,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:13:36,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:13:36,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:13:36,466 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:13:36,466 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:13:36,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-09-01 04:13:37,487 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:13:37,646 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:13:37,646 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-09-01 04:13:37,674 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1465f165/19ee80728fe04849ac8582117a7a8e3f/FLAG29b124f1a [2023-09-01 04:13:37,699 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1465f165/19ee80728fe04849ac8582117a7a8e3f [2023-09-01 04:13:37,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:13:37,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:13:37,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:13:37,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:13:37,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:13:37,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:13:37" (1/1) ... [2023-09-01 04:13:37,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9ca106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:37, skipping insertion in model container [2023-09-01 04:13:37,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:13:37" (1/1) ... [2023-09-01 04:13:37,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:13:37,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:13:37,901 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/unroll-4.wvr.c[2572,2585] [2023-09-01 04:13:37,915 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:13:37,924 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 04:13:37,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ecaa28b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:37, skipping insertion in model container [2023-09-01 04:13:37,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:13:37,926 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 04:13:37,927 INFO L158 Benchmark]: Toolchain (without parser) took 224.98ms. Allocated memory is still 62.9MB. Free memory was 33.7MB in the beginning and 39.7MB in the end (delta: -6.0MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2023-09-01 04:13:37,928 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 52.4MB. Free memory was 30.5MB in the beginning and 30.5MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:13:37,928 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.03ms. Allocated memory is still 62.9MB. Free memory was 33.4MB in the beginning and 39.7MB in the end (delta: -6.4MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2023-09-01 04:13:37,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 52.4MB. Free memory was 30.5MB in the beginning and 30.5MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.03ms. Allocated memory is still 62.9MB. Free memory was 33.4MB in the beginning and 39.7MB in the end (delta: -6.4MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 103]: 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/unroll-4.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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:13:39,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:13:39,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:13:39,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:13:39,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:13:39,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:13:39,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:13:39,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:13:39,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:13:39,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:13:39,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:13:39,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:13:39,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:13:39,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:13:39,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:13:39,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:13:39,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:13:39,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:13:39,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:13:39,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:13:39,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:13:39,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:13:39,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:13:39,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:13:39,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:13:39,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:13:39,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:13:39,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:13:39,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:13:39,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:13:39,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:13:39,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:13:39,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:13:39,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:13:39,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:13:39,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:13:39,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:13:39,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:13:39,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:13:39,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:13:39,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:13:39,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 04:13:39,488 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:13:39,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:13:39,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:13:39,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:13:39,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:13:39,489 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:13:39,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:13:39,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:13:39,489 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:13:39,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:13:39,489 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:13:39,489 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:13:39,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:13:39,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:13:39,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:13:39,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:13:39,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:13:39,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:13:39,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:13:39,491 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 04:13:39,491 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 04:13:39,491 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:13:39,491 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:13:39,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:13:39,491 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 04:13:39,491 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:13:39,491 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:13:39,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:13:39,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:13:39,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:13:39,762 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:13:39,763 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:13:39,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-09-01 04:13:40,718 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:13:40,875 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:13:40,876 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-09-01 04:13:40,880 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6eedd0d3/f71598dc05e84d1cafeaf983f94ee32e/FLAG47f53db80 [2023-09-01 04:13:40,893 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6eedd0d3/f71598dc05e84d1cafeaf983f94ee32e [2023-09-01 04:13:40,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:13:40,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:13:40,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:13:40,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:13:40,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:13:40,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:13:40" (1/1) ... [2023-09-01 04:13:40,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b68be9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:40, skipping insertion in model container [2023-09-01 04:13:40,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:13:40" (1/1) ... [2023-09-01 04:13:40,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:13:40,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:13:41,059 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/unroll-4.wvr.c[2572,2585] [2023-09-01 04:13:41,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:13:41,074 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 04:13:41,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:13:41,091 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/unroll-4.wvr.c[2572,2585] [2023-09-01 04:13:41,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:13:41,110 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:13:41,137 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/unroll-4.wvr.c[2572,2585] [2023-09-01 04:13:41,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:13:41,160 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:13:41,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41 WrapperNode [2023-09-01 04:13:41,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:13:41,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:13:41,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:13:41,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:13:41,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (1/1) ... [2023-09-01 04:13:41,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (1/1) ... [2023-09-01 04:13:41,203 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 155 [2023-09-01 04:13:41,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:13:41,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:13:41,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:13:41,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:13:41,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (1/1) ... [2023-09-01 04:13:41,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (1/1) ... [2023-09-01 04:13:41,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (1/1) ... [2023-09-01 04:13:41,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (1/1) ... [2023-09-01 04:13:41,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (1/1) ... [2023-09-01 04:13:41,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (1/1) ... [2023-09-01 04:13:41,267 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (1/1) ... [2023-09-01 04:13:41,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (1/1) ... [2023-09-01 04:13:41,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:13:41,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:13:41,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:13:41,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:13:41,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (1/1) ... [2023-09-01 04:13:41,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:13:41,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:13:41,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 04:13:41,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 04:13:41,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:13:41,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 04:13:41,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:13:41,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 04:13:41,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 04:13:41,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 04:13:41,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 04:13:41,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 04:13:41,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 04:13:41,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:13:41,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:13:41,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:13:41,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 04:13:41,371 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:13:41,487 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:13:41,488 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:13:41,951 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:13:41,959 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:13:41,960 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 04:13:41,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:13:41 BoogieIcfgContainer [2023-09-01 04:13:41,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:13:41,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:13:41,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:13:41,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:13:41,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:13:40" (1/3) ... [2023-09-01 04:13:41,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735a7c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:13:41, skipping insertion in model container [2023-09-01 04:13:41,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:13:41" (2/3) ... [2023-09-01 04:13:41,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735a7c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:13:41, skipping insertion in model container [2023-09-01 04:13:41,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:13:41" (3/3) ... [2023-09-01 04:13:41,970 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2023-09-01 04:13:41,985 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:13:41,985 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-09-01 04:13:41,985 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:13:42,086 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 04:13:42,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 205 transitions, 426 flow [2023-09-01 04:13:42,198 INFO L130 PetriNetUnfolder]: 16/203 cut-off events. [2023-09-01 04:13:42,198 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:13:42,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 203 events. 16/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 264 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-09-01 04:13:42,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 205 transitions, 426 flow [2023-09-01 04:13:42,209 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 199 transitions, 410 flow [2023-09-01 04:13:42,211 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:13:42,218 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 199 transitions, 410 flow [2023-09-01 04:13:42,220 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 199 transitions, 410 flow [2023-09-01 04:13:42,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 199 transitions, 410 flow [2023-09-01 04:13:42,264 INFO L130 PetriNetUnfolder]: 16/199 cut-off events. [2023-09-01 04:13:42,264 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:13:42,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 199 events. 16/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 249 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-09-01 04:13:42,270 INFO L119 LiptonReduction]: Number of co-enabled transitions 4638 [2023-09-01 04:13:59,213 INFO L134 LiptonReduction]: Checked pairs total: 4495 [2023-09-01 04:13:59,214 INFO L136 LiptonReduction]: Total number of compositions: 232 [2023-09-01 04:13:59,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:13:59,228 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;@37247abc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:13:59,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-09-01 04:13:59,230 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 04:13:59,230 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:13:59,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:59,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:13:59,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:13:59,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:13:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash 26440, now seen corresponding path program 1 times [2023-09-01 04:13:59,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:13:59,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997820907] [2023-09-01 04:13:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:13:59,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:13:59,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:13:59,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:13:59,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 04:13:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:13:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 04:13:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:13:59,486 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:13:59,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:13:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:13:59,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:13:59,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:13:59,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997820907] [2023-09-01 04:13:59,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997820907] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:13:59,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:13:59,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:13:59,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937983372] [2023-09-01 04:13:59,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:13:59,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:13:59,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:13:59,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:13:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:13:59,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 437 [2023-09-01 04:13:59,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:59,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:13:59,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 437 [2023-09-01 04:13:59,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:13:59,955 INFO L130 PetriNetUnfolder]: 527/749 cut-off events. [2023-09-01 04:13:59,956 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 04:13:59,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1517 conditions, 749 events. 527/749 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 3114 event pairs, 251 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 1302. Up to 742 conditions per place. [2023-09-01 04:13:59,960 INFO L137 encePairwiseOnDemand]: 427/437 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-09-01 04:13:59,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 152 flow [2023-09-01 04:13:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:13:59,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:13:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2023-09-01 04:13:59,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416475972540046 [2023-09-01 04:13:59,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2023-09-01 04:13:59,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2023-09-01 04:13:59,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:13:59,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2023-09-01 04:13:59,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:59,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:59,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:59,983 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 88 flow. Second operand 3 states and 579 transitions. [2023-09-01 04:13:59,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 152 flow [2023-09-01 04:13:59,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 04:13:59,987 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 90 flow [2023-09-01 04:13:59,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-09-01 04:13:59,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-09-01 04:13:59,991 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 90 flow [2023-09-01 04:13:59,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:13:59,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:13:59,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:13:59,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:00,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:00,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:00,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash 26439, now seen corresponding path program 1 times [2023-09-01 04:14:00,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:00,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935542242] [2023-09-01 04:14:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:00,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:00,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:00,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 04:14:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:00,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:14:00,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:00,307 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:14:00,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:14:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:00,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:14:00,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:00,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935542242] [2023-09-01 04:14:00,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935542242] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:14:00,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:14:00,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:14:00,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301786883] [2023-09-01 04:14:00,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:14:00,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:14:00,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:00,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:14:00,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:14:00,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 437 [2023-09-01 04:14:00,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:00,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:00,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 437 [2023-09-01 04:14:00,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:00,649 INFO L130 PetriNetUnfolder]: 527/747 cut-off events. [2023-09-01 04:14:00,649 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 04:14:00,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 747 events. 527/747 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 3187 event pairs, 251 based on Foata normal form. 2/186 useless extension candidates. Maximal degree in co-relation 1495. Up to 741 conditions per place. [2023-09-01 04:14:00,654 INFO L137 encePairwiseOnDemand]: 435/437 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-09-01 04:14:00,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 152 flow [2023-09-01 04:14:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:14:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:14:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-09-01 04:14:00,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2023-09-01 04:14:00,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-09-01 04:14:00,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-09-01 04:14:00,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:00,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-09-01 04:14:00,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:00,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:00,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:00,673 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 90 flow. Second operand 3 states and 575 transitions. [2023-09-01 04:14:00,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 152 flow [2023-09-01 04:14:00,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 148 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 04:14:00,674 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 86 flow [2023-09-01 04:14:00,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-09-01 04:14:00,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-09-01 04:14:00,675 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 86 flow [2023-09-01 04:14:00,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:00,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:00,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:14:00,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:00,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:00,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:00,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash 822027, now seen corresponding path program 1 times [2023-09-01 04:14:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:00,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321421568] [2023-09-01 04:14:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:00,884 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 [2023-09-01 04:14:00,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:00,886 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:00,888 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 (4)] Waiting until timeout for monitored process [2023-09-01 04:14:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:00,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:14:00,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:00,974 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 04:14:00,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2023-09-01 04:14:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:14:01,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:14:01,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:01,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321421568] [2023-09-01 04:14:01,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321421568] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:14:01,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:14:01,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:14:01,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101667228] [2023-09-01 04:14:01,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:14:01,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:14:01,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:01,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:14:01,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:14:01,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 437 [2023-09-01 04:14:01,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:01,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:01,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 437 [2023-09-01 04:14:01,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:01,348 INFO L130 PetriNetUnfolder]: 398/577 cut-off events. [2023-09-01 04:14:01,349 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 04:14:01,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1164 conditions, 577 events. 398/577 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 2390 event pairs, 189 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 1156. Up to 571 conditions per place. [2023-09-01 04:14:01,351 INFO L137 encePairwiseOnDemand]: 434/437 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-09-01 04:14:01,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 140 flow [2023-09-01 04:14:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:14:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:14:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2023-09-01 04:14:01,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43783371472158655 [2023-09-01 04:14:01,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2023-09-01 04:14:01,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2023-09-01 04:14:01,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:01,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2023-09-01 04:14:01,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:01,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:01,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:01,358 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 86 flow. Second operand 3 states and 574 transitions. [2023-09-01 04:14:01,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 140 flow [2023-09-01 04:14:01,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:14:01,360 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 81 flow [2023-09-01 04:14:01,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-09-01 04:14:01,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-09-01 04:14:01,361 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 81 flow [2023-09-01 04:14:01,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:01,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:01,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:14:01,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-09-01 04:14:01,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:01,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:01,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash 822026, now seen corresponding path program 1 times [2023-09-01 04:14:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:01,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850277904] [2023-09-01 04:14:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:01,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:01,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:01,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:01,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 04:14:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:01,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:14:01,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:01,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:14:01,697 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-09-01 04:14:01,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2023-09-01 04:14:01,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-09-01 04:14:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:14:01,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:14:01,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:01,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850277904] [2023-09-01 04:14:01,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850277904] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:14:01,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:14:01,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:14:01,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354296441] [2023-09-01 04:14:01,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:14:01,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:14:01,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:01,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:14:01,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:14:01,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 437 [2023-09-01 04:14:01,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:01,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:01,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 437 [2023-09-01 04:14:01,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:02,101 INFO L130 PetriNetUnfolder]: 269/407 cut-off events. [2023-09-01 04:14:02,101 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 04:14:02,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 407 events. 269/407 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 1629 event pairs, 127 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 815. Up to 401 conditions per place. [2023-09-01 04:14:02,103 INFO L137 encePairwiseOnDemand]: 434/437 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 04:14:02,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 131 flow [2023-09-01 04:14:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:14:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:14:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2023-09-01 04:14:02,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43630816170861936 [2023-09-01 04:14:02,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2023-09-01 04:14:02,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2023-09-01 04:14:02,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:02,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2023-09-01 04:14:02,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:02,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:02,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:02,109 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 81 flow. Second operand 3 states and 572 transitions. [2023-09-01 04:14:02,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 131 flow [2023-09-01 04:14:02,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:14:02,110 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 76 flow [2023-09-01 04:14:02,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-09-01 04:14:02,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-09-01 04:14:02,110 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 76 flow [2023-09-01 04:14:02,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:02,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:02,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:14:02,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:02,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:02,318 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:02,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:02,319 INFO L85 PathProgramCache]: Analyzing trace with hash 821931, now seen corresponding path program 1 times [2023-09-01 04:14:02,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:02,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639865318] [2023-09-01 04:14:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:02,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:02,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:02,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:02,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 04:14:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:02,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:14:02,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:02,408 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:14:02,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:14:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:02,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:14:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:02,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:02,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639865318] [2023-09-01 04:14:02,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639865318] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:14:02,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:14:02,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 04:14:02,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772747478] [2023-09-01 04:14:02,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:14:02,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:14:02,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:02,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:14:02,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:14:03,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 437 [2023-09-01 04:14:03,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:03,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:03,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 437 [2023-09-01 04:14:03,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:03,654 INFO L130 PetriNetUnfolder]: 539/815 cut-off events. [2023-09-01 04:14:03,654 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:14:03,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1647 conditions, 815 events. 539/815 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 3880 event pairs, 254 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 1637. Up to 400 conditions per place. [2023-09-01 04:14:03,657 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 50 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2023-09-01 04:14:03,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 264 flow [2023-09-01 04:14:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:14:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:14:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1116 transitions. [2023-09-01 04:14:03,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425629290617849 [2023-09-01 04:14:03,661 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1116 transitions. [2023-09-01 04:14:03,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1116 transitions. [2023-09-01 04:14:03,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:03,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1116 transitions. [2023-09-01 04:14:03,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:03,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:03,667 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:03,667 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 76 flow. Second operand 6 states and 1116 transitions. [2023-09-01 04:14:03,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 264 flow [2023-09-01 04:14:03,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:14:03,669 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 133 flow [2023-09-01 04:14:03,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-09-01 04:14:03,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-09-01 04:14:03,669 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 133 flow [2023-09-01 04:14:03,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:03,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:03,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:14:03,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-09-01 04:14:03,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:03,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:03,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash 789987107, now seen corresponding path program 1 times [2023-09-01 04:14:03,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:03,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394255460] [2023-09-01 04:14:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:03,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:03,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:03,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:03,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 04:14:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:03,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 04:14:03,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:03,996 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:14:03,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:14:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:04,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:14:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:04,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:04,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394255460] [2023-09-01 04:14:04,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394255460] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:14:04,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:14:04,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:14:04,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974168549] [2023-09-01 04:14:04,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:14:04,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:14:04,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:04,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:14:04,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:14:04,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 437 [2023-09-01 04:14:04,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 133 flow. Second operand has 8 states, 8 states have (on average 173.25) internal successors, (1386), 8 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:04,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:04,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 437 [2023-09-01 04:14:04,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:05,272 INFO L130 PetriNetUnfolder]: 497/747 cut-off events. [2023-09-01 04:14:05,272 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-09-01 04:14:05,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 747 events. 497/747 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 3428 event pairs, 234 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 1520. Up to 370 conditions per place. [2023-09-01 04:14:05,275 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 50 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-09-01 04:14:05,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 289 flow [2023-09-01 04:14:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:14:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:14:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 913 transitions. [2023-09-01 04:14:05,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41784897025171625 [2023-09-01 04:14:05,278 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 913 transitions. [2023-09-01 04:14:05,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 913 transitions. [2023-09-01 04:14:05,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:05,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 913 transitions. [2023-09-01 04:14:05,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 182.6) internal successors, (913), 5 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:05,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:05,283 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:05,283 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 133 flow. Second operand 5 states and 913 transitions. [2023-09-01 04:14:05,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 289 flow [2023-09-01 04:14:05,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 281 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 04:14:05,286 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 127 flow [2023-09-01 04:14:05,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-09-01 04:14:05,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-09-01 04:14:05,289 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 127 flow [2023-09-01 04:14:05,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.25) internal successors, (1386), 8 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:05,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:05,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:14:05,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:05,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:05,497 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:05,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash 789987106, now seen corresponding path program 1 times [2023-09-01 04:14:05,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:05,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254521717] [2023-09-01 04:14:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:05,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:05,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:05,499 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:05,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 04:14:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:05,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:14:05,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:05,598 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-09-01 04:14:05,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-09-01 04:14:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:14:05,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:14:05,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:05,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254521717] [2023-09-01 04:14:05,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254521717] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:14:05,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:14:05,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:14:05,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145060577] [2023-09-01 04:14:05,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:14:05,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:14:05,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:05,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:14:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:14:05,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2023-09-01 04:14:05,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:05,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:05,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2023-09-01 04:14:05,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:05,878 INFO L130 PetriNetUnfolder]: 455/679 cut-off events. [2023-09-01 04:14:05,878 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 04:14:05,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1399 conditions, 679 events. 455/679 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 3081 event pairs, 214 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 1383. Up to 667 conditions per place. [2023-09-01 04:14:05,881 INFO L137 encePairwiseOnDemand]: 434/437 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-09-01 04:14:05,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 31 transitions, 181 flow [2023-09-01 04:14:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:14:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:14:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-09-01 04:14:05,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263920671243326 [2023-09-01 04:14:05,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-09-01 04:14:05,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-09-01 04:14:05,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:05,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-09-01 04:14:05,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:05,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:05,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:05,887 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 127 flow. Second operand 3 states and 559 transitions. [2023-09-01 04:14:05,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 31 transitions, 181 flow [2023-09-01 04:14:05,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 04:14:05,890 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 120 flow [2023-09-01 04:14:05,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-09-01 04:14:05,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-09-01 04:14:05,891 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 120 flow [2023-09-01 04:14:05,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:05,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:05,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:14:05,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:06,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:06,101 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:06,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:06,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1280210086, now seen corresponding path program 1 times [2023-09-01 04:14:06,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:06,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641287677] [2023-09-01 04:14:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:06,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:06,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:06,103 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:06,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 04:14:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:14:06,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:06,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:14:06,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-09-01 04:14:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:06,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:06,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641287677] [2023-09-01 04:14:06,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641287677] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:14:06,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:14:06,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:14:06,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174885011] [2023-09-01 04:14:06,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:14:06,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:14:06,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:06,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:14:06,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:14:07,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 437 [2023-09-01 04:14:07,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 120 flow. Second operand has 8 states, 8 states have (on average 174.25) internal successors, (1394), 8 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:07,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:07,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 437 [2023-09-01 04:14:07,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:08,092 INFO L130 PetriNetUnfolder]: 601/935 cut-off events. [2023-09-01 04:14:08,092 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 04:14:08,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 935 events. 601/935 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4901 event pairs, 134 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1902. Up to 575 conditions per place. [2023-09-01 04:14:08,096 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 56 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2023-09-01 04:14:08,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 67 transitions, 335 flow [2023-09-01 04:14:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 04:14:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 04:14:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1274 transitions. [2023-09-01 04:14:08,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41647597254004576 [2023-09-01 04:14:08,099 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1274 transitions. [2023-09-01 04:14:08,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1274 transitions. [2023-09-01 04:14:08,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:08,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1274 transitions. [2023-09-01 04:14:08,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 182.0) internal successors, (1274), 7 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:08,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:08,105 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:08,105 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 120 flow. Second operand 7 states and 1274 transitions. [2023-09-01 04:14:08,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 67 transitions, 335 flow [2023-09-01 04:14:08,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 67 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:14:08,107 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 161 flow [2023-09-01 04:14:08,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-09-01 04:14:08,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2023-09-01 04:14:08,109 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 161 flow [2023-09-01 04:14:08,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 174.25) internal successors, (1394), 8 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:08,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:08,110 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 04:14:08,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:08,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:08,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:08,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:08,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1281382392, now seen corresponding path program 2 times [2023-09-01 04:14:08,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:08,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372764754] [2023-09-01 04:14:08,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:14:08,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:08,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:08,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:08,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 04:14:08,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:14:08,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:14:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 04:14:08,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:08,429 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:14:08,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:14:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:08,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:14:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:08,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:08,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372764754] [2023-09-01 04:14:08,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372764754] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:14:08,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:14:08,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:14:08,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122397984] [2023-09-01 04:14:08,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:14:08,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:14:08,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:08,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:14:08,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:14:12,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 437 [2023-09-01 04:14:12,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 161 flow. Second operand has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:12,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:12,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 437 [2023-09-01 04:14:12,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:15,391 INFO L130 PetriNetUnfolder]: 2468/3956 cut-off events. [2023-09-01 04:14:15,392 INFO L131 PetriNetUnfolder]: For 811/811 co-relation queries the response was YES. [2023-09-01 04:14:15,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8771 conditions, 3956 events. 2468/3956 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 25310 event pairs, 1503 based on Foata normal form. 6/2035 useless extension candidates. Maximal degree in co-relation 8752. Up to 450 conditions per place. [2023-09-01 04:14:15,405 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 191 selfloop transitions, 12 changer transitions 0/205 dead transitions. [2023-09-01 04:14:15,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 205 transitions, 1088 flow [2023-09-01 04:14:15,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 04:14:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 04:14:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2312 transitions. [2023-09-01 04:14:15,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440884820747521 [2023-09-01 04:14:15,411 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2312 transitions. [2023-09-01 04:14:15,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2312 transitions. [2023-09-01 04:14:15,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:15,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2312 transitions. [2023-09-01 04:14:15,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 192.66666666666666) internal successors, (2312), 12 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:15,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 437.0) internal successors, (5681), 13 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:15,421 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 437.0) internal successors, (5681), 13 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:15,421 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 161 flow. Second operand 12 states and 2312 transitions. [2023-09-01 04:14:15,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 205 transitions, 1088 flow [2023-09-01 04:14:15,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 205 transitions, 1074 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 04:14:15,424 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 250 flow [2023-09-01 04:14:15,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=250, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2023-09-01 04:14:15,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2023-09-01 04:14:15,425 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 250 flow [2023-09-01 04:14:15,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:15,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:15,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:14:15,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:15,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:15,633 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:15,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1280210087, now seen corresponding path program 1 times [2023-09-01 04:14:15,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:15,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743634619] [2023-09-01 04:14:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:15,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:15,635 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:15,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 04:14:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:15,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:14:15,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:15,705 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 04:14:15,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 04:14:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:14:15,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:14:15,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:15,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743634619] [2023-09-01 04:14:15,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743634619] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:14:15,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:14:15,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:14:15,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127752658] [2023-09-01 04:14:15,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:14:15,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:14:15,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:15,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:14:15,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:14:15,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 437 [2023-09-01 04:14:15,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:15,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:15,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 437 [2023-09-01 04:14:15,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:16,253 INFO L130 PetriNetUnfolder]: 1667/2705 cut-off events. [2023-09-01 04:14:16,253 INFO L131 PetriNetUnfolder]: For 752/752 co-relation queries the response was YES. [2023-09-01 04:14:16,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6212 conditions, 2705 events. 1667/2705 cut-off events. For 752/752 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16767 event pairs, 954 based on Foata normal form. 0/1616 useless extension candidates. Maximal degree in co-relation 6185. Up to 2647 conditions per place. [2023-09-01 04:14:16,263 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 31 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2023-09-01 04:14:16,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 39 transitions, 320 flow [2023-09-01 04:14:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:14:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:14:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 699 transitions. [2023-09-01 04:14:16,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998855835240275 [2023-09-01 04:14:16,265 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 699 transitions. [2023-09-01 04:14:16,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 699 transitions. [2023-09-01 04:14:16,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:16,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 699 transitions. [2023-09-01 04:14:16,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:16,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:16,268 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:16,269 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 250 flow. Second operand 4 states and 699 transitions. [2023-09-01 04:14:16,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 39 transitions, 320 flow [2023-09-01 04:14:16,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 39 transitions, 307 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-09-01 04:14:16,271 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 245 flow [2023-09-01 04:14:16,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2023-09-01 04:14:16,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2023-09-01 04:14:16,271 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 245 flow [2023-09-01 04:14:16,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:16,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:16,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:14:16,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:16,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:16,479 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:16,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:16,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1031806189, now seen corresponding path program 1 times [2023-09-01 04:14:16,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:16,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403803702] [2023-09-01 04:14:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:14:16,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:16,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:16,480 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:16,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 04:14:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:14:16,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 04:14:16,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:16,615 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:14:16,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:14:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:14:16,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:14:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:14:17,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:17,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403803702] [2023-09-01 04:14:17,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403803702] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:14:17,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:14:17,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 04:14:17,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044955077] [2023-09-01 04:14:17,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:14:17,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:14:17,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:17,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:14:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:14:24,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 437 [2023-09-01 04:14:24,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 173.5) internal successors, (1388), 8 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:24,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:24,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 437 [2023-09-01 04:14:24,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:27,490 INFO L130 PetriNetUnfolder]: 1283/2129 cut-off events. [2023-09-01 04:14:27,490 INFO L131 PetriNetUnfolder]: For 670/670 co-relation queries the response was YES. [2023-09-01 04:14:27,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4894 conditions, 2129 events. 1283/2129 cut-off events. For 670/670 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 12386 event pairs, 726 based on Foata normal form. 21/1370 useless extension candidates. Maximal degree in co-relation 4866. Up to 1765 conditions per place. [2023-09-01 04:14:27,499 INFO L137 encePairwiseOnDemand]: 428/437 looper letters, 51 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2023-09-01 04:14:27,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 434 flow [2023-09-01 04:14:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 04:14:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 04:14:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1610 transitions. [2023-09-01 04:14:27,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093567251461988 [2023-09-01 04:14:27,504 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1610 transitions. [2023-09-01 04:14:27,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1610 transitions. [2023-09-01 04:14:27,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:27,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1610 transitions. [2023-09-01 04:14:27,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.88888888888889) internal successors, (1610), 9 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:27,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 437.0) internal successors, (4370), 10 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:27,510 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 437.0) internal successors, (4370), 10 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:27,510 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 245 flow. Second operand 9 states and 1610 transitions. [2023-09-01 04:14:27,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 434 flow [2023-09-01 04:14:27,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 427 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:14:27,512 INFO L231 Difference]: Finished difference. Result has 69 places, 39 transitions, 283 flow [2023-09-01 04:14:27,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=69, PETRI_TRANSITIONS=39} [2023-09-01 04:14:27,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2023-09-01 04:14:27,513 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 39 transitions, 283 flow [2023-09-01 04:14:27,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.5) internal successors, (1388), 8 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:27,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:27,514 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 04:14:27,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:27,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:27,721 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:27,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash 307956208, now seen corresponding path program 2 times [2023-09-01 04:14:27,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:27,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863327073] [2023-09-01 04:14:27,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:14:27,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:27,723 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:27,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 04:14:27,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:14:27,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:14:27,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 04:14:27,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:27,833 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:14:27,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:14:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 04:14:27,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:14:27,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:27,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863327073] [2023-09-01 04:14:27,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863327073] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:14:27,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:14:27,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:14:27,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184996482] [2023-09-01 04:14:27,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:14:27,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:14:27,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:27,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:14:27,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:14:28,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2023-09-01 04:14:28,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 39 transitions, 283 flow. Second operand has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:28,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:28,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2023-09-01 04:14:28,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:14:28,417 INFO L130 PetriNetUnfolder]: 515/977 cut-off events. [2023-09-01 04:14:28,418 INFO L131 PetriNetUnfolder]: For 960/960 co-relation queries the response was YES. [2023-09-01 04:14:28,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2277 conditions, 977 events. 515/977 cut-off events. For 960/960 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5443 event pairs, 270 based on Foata normal form. 162/959 useless extension candidates. Maximal degree in co-relation 2247. Up to 919 conditions per place. [2023-09-01 04:14:28,421 INFO L137 encePairwiseOnDemand]: 430/437 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-09-01 04:14:28,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 34 transitions, 313 flow [2023-09-01 04:14:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:14:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:14:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 733 transitions. [2023-09-01 04:14:28,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4193363844393593 [2023-09-01 04:14:28,424 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 733 transitions. [2023-09-01 04:14:28,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 733 transitions. [2023-09-01 04:14:28,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:14:28,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 733 transitions. [2023-09-01 04:14:28,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:28,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:28,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:28,428 INFO L175 Difference]: Start difference. First operand has 69 places, 39 transitions, 283 flow. Second operand 4 states and 733 transitions. [2023-09-01 04:14:28,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 34 transitions, 313 flow [2023-09-01 04:14:28,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 34 transitions, 262 flow, removed 8 selfloop flow, removed 12 redundant places. [2023-09-01 04:14:28,431 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 210 flow [2023-09-01 04:14:28,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2023-09-01 04:14:28,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-09-01 04:14:28,432 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 210 flow [2023-09-01 04:14:28,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:28,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:14:28,433 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 04:14:28,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 04:14:28,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:28,641 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:14:28,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:14:28,641 INFO L85 PathProgramCache]: Analyzing trace with hash -969763544, now seen corresponding path program 3 times [2023-09-01 04:14:28,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:14:28,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147459487] [2023-09-01 04:14:28,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:14:28,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:14:28,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:14:28,642 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:14:28,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 04:14:28,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 04:14:28,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:14:28,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 04:14:28,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:14:28,838 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 04:14:28,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 04:14:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:29,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:14:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:14:31,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:14:31,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147459487] [2023-09-01 04:14:31,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147459487] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:14:31,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:14:31,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 04:14:31,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607138524] [2023-09-01 04:14:31,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:14:31,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 04:14:31,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:14:31,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 04:14:31,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 04:14:47,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 437 [2023-09-01 04:14:47,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 34 transitions, 210 flow. Second operand has 24 states, 24 states have (on average 177.0) internal successors, (4248), 24 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:14:47,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:14:47,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 437 [2023-09-01 04:14:47,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:01,569 INFO L130 PetriNetUnfolder]: 1199/2273 cut-off events. [2023-09-01 04:15:01,569 INFO L131 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2023-09-01 04:15:01,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5062 conditions, 2273 events. 1199/2273 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13394 event pairs, 630 based on Foata normal form. 12/1865 useless extension candidates. Maximal degree in co-relation 5039. Up to 504 conditions per place. [2023-09-01 04:15:01,575 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2023-09-01 04:15:01,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 322 transitions, 1860 flow [2023-09-01 04:15:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 04:15:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 04:15:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4535 transitions. [2023-09-01 04:15:01,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43239893211289093 [2023-09-01 04:15:01,583 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4535 transitions. [2023-09-01 04:15:01,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4535 transitions. [2023-09-01 04:15:01,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:01,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4535 transitions. [2023-09-01 04:15:01,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 188.95833333333334) internal successors, (4535), 24 states have internal predecessors, (4535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:01,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 437.0) internal successors, (10925), 25 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:01,599 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 437.0) internal successors, (10925), 25 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:01,599 INFO L175 Difference]: Start difference. First operand has 55 places, 34 transitions, 210 flow. Second operand 24 states and 4535 transitions. [2023-09-01 04:15:01,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 322 transitions, 1860 flow [2023-09-01 04:15:01,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 322 transitions, 1836 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:15:01,605 INFO L231 Difference]: Finished difference. Result has 89 places, 47 transitions, 394 flow [2023-09-01 04:15:01,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=394, PETRI_PLACES=89, PETRI_TRANSITIONS=47} [2023-09-01 04:15:01,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2023-09-01 04:15:01,606 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 47 transitions, 394 flow [2023-09-01 04:15:01,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 177.0) internal successors, (4248), 24 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:01,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:01,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:01,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:01,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:01,827 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:15:01,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:01,827 INFO L85 PathProgramCache]: Analyzing trace with hash -129771674, now seen corresponding path program 1 times [2023-09-01 04:15:01,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:01,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749946948] [2023-09-01 04:15:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:15:01,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:01,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:01,828 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:01,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 04:15:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:15:01,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:15:01,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:01,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:15:01,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:01,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749946948] [2023-09-01 04:15:01,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749946948] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:15:01,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:15:01,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:15:01,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986400132] [2023-09-01 04:15:01,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:15:01,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:15:01,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:01,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:15:01,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:15:02,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 437 [2023-09-01 04:15:02,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 47 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:02,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:02,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 437 [2023-09-01 04:15:02,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:02,347 INFO L130 PetriNetUnfolder]: 1493/2756 cut-off events. [2023-09-01 04:15:02,347 INFO L131 PetriNetUnfolder]: For 613/613 co-relation queries the response was YES. [2023-09-01 04:15:02,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6228 conditions, 2756 events. 1493/2756 cut-off events. For 613/613 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 16676 event pairs, 273 based on Foata normal form. 21/2273 useless extension candidates. Maximal degree in co-relation 6192. Up to 2101 conditions per place. [2023-09-01 04:15:02,361 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 51 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2023-09-01 04:15:02,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 58 transitions, 535 flow [2023-09-01 04:15:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:15:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:15:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-09-01 04:15:02,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43707093821510296 [2023-09-01 04:15:02,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-09-01 04:15:02,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-09-01 04:15:02,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:02,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-09-01 04:15:02,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:02,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:02,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:02,366 INFO L175 Difference]: Start difference. First operand has 89 places, 47 transitions, 394 flow. Second operand 3 states and 573 transitions. [2023-09-01 04:15:02,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 58 transitions, 535 flow [2023-09-01 04:15:02,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 58 transitions, 511 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-09-01 04:15:02,370 INFO L231 Difference]: Finished difference. Result has 82 places, 50 transitions, 400 flow [2023-09-01 04:15:02,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=400, PETRI_PLACES=82, PETRI_TRANSITIONS=50} [2023-09-01 04:15:02,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2023-09-01 04:15:02,370 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 50 transitions, 400 flow [2023-09-01 04:15:02,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:02,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:02,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:02,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:02,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:02,574 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:15:02,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:02,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1813199920, now seen corresponding path program 1 times [2023-09-01 04:15:02,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:02,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356699905] [2023-09-01 04:15:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:15:02,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:02,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:02,576 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:02,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 04:15:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:15:02,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:15:02,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:02,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:15:02,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:02,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356699905] [2023-09-01 04:15:02,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356699905] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:15:02,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:15:02,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 04:15:02,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131546908] [2023-09-01 04:15:02,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:15:02,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:15:02,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:02,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:15:02,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:15:02,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 437 [2023-09-01 04:15:02,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 50 transitions, 400 flow. Second operand has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:02,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:02,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 437 [2023-09-01 04:15:02,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:03,162 INFO L130 PetriNetUnfolder]: 1463/2827 cut-off events. [2023-09-01 04:15:03,162 INFO L131 PetriNetUnfolder]: For 1098/1098 co-relation queries the response was YES. [2023-09-01 04:15:03,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7169 conditions, 2827 events. 1463/2827 cut-off events. For 1098/1098 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 18108 event pairs, 420 based on Foata normal form. 160/2947 useless extension candidates. Maximal degree in co-relation 7131. Up to 1608 conditions per place. [2023-09-01 04:15:03,173 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 56 selfloop transitions, 6 changer transitions 2/65 dead transitions. [2023-09-01 04:15:03,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 65 transitions, 569 flow [2023-09-01 04:15:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:15:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:15:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 753 transitions. [2023-09-01 04:15:03,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43077803203661325 [2023-09-01 04:15:03,175 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 753 transitions. [2023-09-01 04:15:03,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 753 transitions. [2023-09-01 04:15:03,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:03,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 753 transitions. [2023-09-01 04:15:03,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:03,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:03,179 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:03,179 INFO L175 Difference]: Start difference. First operand has 82 places, 50 transitions, 400 flow. Second operand 4 states and 753 transitions. [2023-09-01 04:15:03,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 65 transitions, 569 flow [2023-09-01 04:15:03,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 65 transitions, 564 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:15:03,185 INFO L231 Difference]: Finished difference. Result has 86 places, 51 transitions, 423 flow [2023-09-01 04:15:03,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=423, PETRI_PLACES=86, PETRI_TRANSITIONS=51} [2023-09-01 04:15:03,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2023-09-01 04:15:03,185 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 51 transitions, 423 flow [2023-09-01 04:15:03,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:03,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:03,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:03,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-09-01 04:15:03,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:03,394 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:15:03,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:03,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1087389879, now seen corresponding path program 1 times [2023-09-01 04:15:03,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:03,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074576083] [2023-09-01 04:15:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:15:03,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:03,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:03,395 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:03,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 04:15:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:15:03,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:15:03,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:03,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:15:03,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:03,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074576083] [2023-09-01 04:15:03,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074576083] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:15:03,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:15:03,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 04:15:03,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300393022] [2023-09-01 04:15:03,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:15:03,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:15:03,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:15:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:15:03,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 437 [2023-09-01 04:15:03,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 51 transitions, 423 flow. Second operand has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:03,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:03,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 437 [2023-09-01 04:15:03,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:04,078 INFO L130 PetriNetUnfolder]: 1463/2867 cut-off events. [2023-09-01 04:15:04,078 INFO L131 PetriNetUnfolder]: For 2698/2898 co-relation queries the response was YES. [2023-09-01 04:15:04,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8631 conditions, 2867 events. 1463/2867 cut-off events. For 2698/2898 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 17321 event pairs, 380 based on Foata normal form. 320/3147 useless extension candidates. Maximal degree in co-relation 8591. Up to 1760 conditions per place. [2023-09-01 04:15:04,087 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 56 selfloop transitions, 5 changer transitions 4/66 dead transitions. [2023-09-01 04:15:04,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 66 transitions, 599 flow [2023-09-01 04:15:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:15:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:15:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 743 transitions. [2023-09-01 04:15:04,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42505720823798626 [2023-09-01 04:15:04,090 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 743 transitions. [2023-09-01 04:15:04,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 743 transitions. [2023-09-01 04:15:04,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:04,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 743 transitions. [2023-09-01 04:15:04,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:04,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:04,094 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:04,094 INFO L175 Difference]: Start difference. First operand has 86 places, 51 transitions, 423 flow. Second operand 4 states and 743 transitions. [2023-09-01 04:15:04,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 66 transitions, 599 flow [2023-09-01 04:15:04,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 66 transitions, 586 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 04:15:04,099 INFO L231 Difference]: Finished difference. Result has 90 places, 53 transitions, 441 flow [2023-09-01 04:15:04,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=441, PETRI_PLACES=90, PETRI_TRANSITIONS=53} [2023-09-01 04:15:04,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2023-09-01 04:15:04,100 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 53 transitions, 441 flow [2023-09-01 04:15:04,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:04,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:04,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:04,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:04,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:04,308 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:15:04,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:04,308 INFO L85 PathProgramCache]: Analyzing trace with hash -984691997, now seen corresponding path program 2 times [2023-09-01 04:15:04,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:04,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691945467] [2023-09-01 04:15:04,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:15:04,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:04,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:04,309 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:04,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 04:15:04,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:15:04,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:15:04,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:15:04,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:04,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:15:04,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:04,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691945467] [2023-09-01 04:15:04,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691945467] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:15:04,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:15:04,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 04:15:04,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943906391] [2023-09-01 04:15:04,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:15:04,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:15:04,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:04,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:15:04,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:15:04,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 437 [2023-09-01 04:15:04,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 53 transitions, 441 flow. Second operand has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:04,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:04,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 437 [2023-09-01 04:15:04,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:04,935 INFO L130 PetriNetUnfolder]: 1703/3387 cut-off events. [2023-09-01 04:15:04,935 INFO L131 PetriNetUnfolder]: For 4798/5018 co-relation queries the response was YES. [2023-09-01 04:15:04,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11013 conditions, 3387 events. 1703/3387 cut-off events. For 4798/5018 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 21960 event pairs, 580 based on Foata normal form. 300/3687 useless extension candidates. Maximal degree in co-relation 10971. Up to 2108 conditions per place. [2023-09-01 04:15:04,949 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 61 selfloop transitions, 6 changer transitions 2/70 dead transitions. [2023-09-01 04:15:04,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 70 transitions, 654 flow [2023-09-01 04:15:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:15:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:15:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 739 transitions. [2023-09-01 04:15:04,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276887871853547 [2023-09-01 04:15:04,953 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 739 transitions. [2023-09-01 04:15:04,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 739 transitions. [2023-09-01 04:15:04,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:04,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 739 transitions. [2023-09-01 04:15:04,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:04,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:04,957 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:04,957 INFO L175 Difference]: Start difference. First operand has 90 places, 53 transitions, 441 flow. Second operand 4 states and 739 transitions. [2023-09-01 04:15:04,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 70 transitions, 654 flow [2023-09-01 04:15:04,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 70 transitions, 643 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 04:15:04,978 INFO L231 Difference]: Finished difference. Result has 94 places, 55 transitions, 473 flow [2023-09-01 04:15:04,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=473, PETRI_PLACES=94, PETRI_TRANSITIONS=55} [2023-09-01 04:15:04,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2023-09-01 04:15:04,978 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 55 transitions, 473 flow [2023-09-01 04:15:04,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:04,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:04,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:04,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:05,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:05,187 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:15:05,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:05,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1632320708, now seen corresponding path program 2 times [2023-09-01 04:15:05,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:05,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108095039] [2023-09-01 04:15:05,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:15:05,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:05,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:05,188 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:05,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 04:15:05,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:15:05,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:15:05,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:15:05,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:05,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:15:05,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:05,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108095039] [2023-09-01 04:15:05,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108095039] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:15:05,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:15:05,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 04:15:05,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12523998] [2023-09-01 04:15:05,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:15:05,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 04:15:05,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:05,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 04:15:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 04:15:05,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 437 [2023-09-01 04:15:05,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 55 transitions, 473 flow. Second operand has 5 states, 5 states have (on average 180.2) internal successors, (901), 5 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:05,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:05,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 437 [2023-09-01 04:15:05,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:06,019 INFO L130 PetriNetUnfolder]: 2363/4607 cut-off events. [2023-09-01 04:15:06,020 INFO L131 PetriNetUnfolder]: For 9918/9918 co-relation queries the response was YES. [2023-09-01 04:15:06,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17315 conditions, 4607 events. 2363/4607 cut-off events. For 9918/9918 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 30179 event pairs, 720 based on Foata normal form. 80/4687 useless extension candidates. Maximal degree in co-relation 17271. Up to 2608 conditions per place. [2023-09-01 04:15:06,036 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 63 selfloop transitions, 12 changer transitions 6/81 dead transitions. [2023-09-01 04:15:06,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 81 transitions, 781 flow [2023-09-01 04:15:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:15:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:15:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 928 transitions. [2023-09-01 04:15:06,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247139588100686 [2023-09-01 04:15:06,039 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 928 transitions. [2023-09-01 04:15:06,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 928 transitions. [2023-09-01 04:15:06,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:06,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 928 transitions. [2023-09-01 04:15:06,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.6) internal successors, (928), 5 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:06,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:06,042 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:06,042 INFO L175 Difference]: Start difference. First operand has 94 places, 55 transitions, 473 flow. Second operand 5 states and 928 transitions. [2023-09-01 04:15:06,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 81 transitions, 781 flow [2023-09-01 04:15:06,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 81 transitions, 753 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-09-01 04:15:06,076 INFO L231 Difference]: Finished difference. Result has 100 places, 62 transitions, 561 flow [2023-09-01 04:15:06,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=561, PETRI_PLACES=100, PETRI_TRANSITIONS=62} [2023-09-01 04:15:06,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2023-09-01 04:15:06,077 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 62 transitions, 561 flow [2023-09-01 04:15:06,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 180.2) internal successors, (901), 5 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:06,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:06,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:06,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:06,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:06,286 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:15:06,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1244738460, now seen corresponding path program 3 times [2023-09-01 04:15:06,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:06,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051543953] [2023-09-01 04:15:06,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:15:06,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:06,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:06,288 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:06,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 04:15:06,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 04:15:06,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:15:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:15:06,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:06,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:15:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:06,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:06,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051543953] [2023-09-01 04:15:06,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051543953] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 04:15:06,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:15:06,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-09-01 04:15:06,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463196921] [2023-09-01 04:15:06,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:15:06,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:15:06,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:06,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:15:06,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:15:06,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 437 [2023-09-01 04:15:06,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 62 transitions, 561 flow. Second operand has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:06,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:06,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 437 [2023-09-01 04:15:06,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:07,228 INFO L130 PetriNetUnfolder]: 2183/4327 cut-off events. [2023-09-01 04:15:07,229 INFO L131 PetriNetUnfolder]: For 11878/12118 co-relation queries the response was YES. [2023-09-01 04:15:07,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17078 conditions, 4327 events. 2183/4327 cut-off events. For 11878/12118 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 28761 event pairs, 780 based on Foata normal form. 300/4487 useless extension candidates. Maximal degree in co-relation 17031. Up to 2800 conditions per place. [2023-09-01 04:15:07,248 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 59 selfloop transitions, 9 changer transitions 5/76 dead transitions. [2023-09-01 04:15:07,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 76 transitions, 779 flow [2023-09-01 04:15:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:15:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:15:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 753 transitions. [2023-09-01 04:15:07,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43077803203661325 [2023-09-01 04:15:07,250 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 753 transitions. [2023-09-01 04:15:07,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 753 transitions. [2023-09-01 04:15:07,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:07,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 753 transitions. [2023-09-01 04:15:07,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:07,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:07,254 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:07,254 INFO L175 Difference]: Start difference. First operand has 100 places, 62 transitions, 561 flow. Second operand 4 states and 753 transitions. [2023-09-01 04:15:07,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 76 transitions, 779 flow [2023-09-01 04:15:07,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 76 transitions, 759 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 04:15:07,278 INFO L231 Difference]: Finished difference. Result has 104 places, 65 transitions, 604 flow [2023-09-01 04:15:07,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=604, PETRI_PLACES=104, PETRI_TRANSITIONS=65} [2023-09-01 04:15:07,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2023-09-01 04:15:07,279 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 65 transitions, 604 flow [2023-09-01 04:15:07,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:07,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:07,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:07,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:07,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:07,488 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:15:07,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2028978141, now seen corresponding path program 3 times [2023-09-01 04:15:07,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:07,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951396177] [2023-09-01 04:15:07,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:15:07,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:07,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:07,490 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:07,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 04:15:07,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 04:15:07,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:15:07,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:15:07,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:07,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:15:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:07,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:07,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951396177] [2023-09-01 04:15:07,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951396177] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:15:07,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:15:07,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-09-01 04:15:07,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777160327] [2023-09-01 04:15:07,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:15:07,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:15:07,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:07,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:15:07,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:15:07,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 437 [2023-09-01 04:15:07,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 65 transitions, 604 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:07,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:07,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 437 [2023-09-01 04:15:07,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:08,896 INFO L130 PetriNetUnfolder]: 3083/5847 cut-off events. [2023-09-01 04:15:08,897 INFO L131 PetriNetUnfolder]: For 19238/19918 co-relation queries the response was YES. [2023-09-01 04:15:08,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23720 conditions, 5847 events. 3083/5847 cut-off events. For 19238/19918 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 39772 event pairs, 580 based on Foata normal form. 1340/7107 useless extension candidates. Maximal degree in co-relation 23671. Up to 2148 conditions per place. [2023-09-01 04:15:08,922 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 76 selfloop transitions, 20 changer transitions 8/107 dead transitions. [2023-09-01 04:15:08,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 107 transitions, 1049 flow [2023-09-01 04:15:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 04:15:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 04:15:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1313 transitions. [2023-09-01 04:15:08,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42922523700555737 [2023-09-01 04:15:08,925 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1313 transitions. [2023-09-01 04:15:08,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1313 transitions. [2023-09-01 04:15:08,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:08,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1313 transitions. [2023-09-01 04:15:08,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.57142857142858) internal successors, (1313), 7 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:08,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:08,929 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:08,929 INFO L175 Difference]: Start difference. First operand has 104 places, 65 transitions, 604 flow. Second operand 7 states and 1313 transitions. [2023-09-01 04:15:08,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 107 transitions, 1049 flow [2023-09-01 04:15:08,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 107 transitions, 1022 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-09-01 04:15:08,970 INFO L231 Difference]: Finished difference. Result has 113 places, 71 transitions, 726 flow [2023-09-01 04:15:08,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=726, PETRI_PLACES=113, PETRI_TRANSITIONS=71} [2023-09-01 04:15:08,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2023-09-01 04:15:08,971 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 71 transitions, 726 flow [2023-09-01 04:15:08,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:08,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:08,971 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:08,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:09,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:09,184 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:15:09,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1592113014, now seen corresponding path program 4 times [2023-09-01 04:15:09,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:09,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553677026] [2023-09-01 04:15:09,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 04:15:09,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:09,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:09,186 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:09,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 04:15:09,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 04:15:09,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:15:09,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:15:09,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 04:15:09,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:15:09,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:15:09,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553677026] [2023-09-01 04:15:09,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553677026] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:15:09,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:15:09,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 04:15:09,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505013049] [2023-09-01 04:15:09,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:15:09,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:15:09,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:15:09,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:15:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:15:09,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 437 [2023-09-01 04:15:09,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 71 transitions, 726 flow. Second operand has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:09,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:15:09,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 437 [2023-09-01 04:15:09,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:15:10,255 INFO L130 PetriNetUnfolder]: 3063/5387 cut-off events. [2023-09-01 04:15:10,256 INFO L131 PetriNetUnfolder]: For 26521/26721 co-relation queries the response was YES. [2023-09-01 04:15:10,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25204 conditions, 5387 events. 3063/5387 cut-off events. For 26521/26721 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 31755 event pairs, 1060 based on Foata normal form. 380/5727 useless extension candidates. Maximal degree in co-relation 25151. Up to 3788 conditions per place. [2023-09-01 04:15:10,280 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 70 selfloop transitions, 17 changer transitions 1/90 dead transitions. [2023-09-01 04:15:10,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 90 transitions, 1052 flow [2023-09-01 04:15:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:15:10,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:15:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 739 transitions. [2023-09-01 04:15:10,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276887871853547 [2023-09-01 04:15:10,282 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 739 transitions. [2023-09-01 04:15:10,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 739 transitions. [2023-09-01 04:15:10,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:15:10,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 739 transitions. [2023-09-01 04:15:10,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:10,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:10,284 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:10,284 INFO L175 Difference]: Start difference. First operand has 113 places, 71 transitions, 726 flow. Second operand 4 states and 739 transitions. [2023-09-01 04:15:10,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 90 transitions, 1052 flow [2023-09-01 04:15:10,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 90 transitions, 964 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-09-01 04:15:10,333 INFO L231 Difference]: Finished difference. Result has 114 places, 77 transitions, 790 flow [2023-09-01 04:15:10,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=790, PETRI_PLACES=114, PETRI_TRANSITIONS=77} [2023-09-01 04:15:10,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2023-09-01 04:15:10,333 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 77 transitions, 790 flow [2023-09-01 04:15:10,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:15:10,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:15:10,334 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:15:10,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 04:15:10,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:10,534 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-09-01 04:15:10,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:15:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash -143240644, now seen corresponding path program 1 times [2023-09-01 04:15:10,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:15:10,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010932746] [2023-09-01 04:15:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:15:10,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:15:10,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:15:10,536 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:15:10,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 04:15:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:15:10,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 04:15:10,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:15:11,226 INFO L321 Elim1Store]: treesize reduction 568, result has 4.2 percent of original size [2023-09-01 04:15:11,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 66 case distinctions, treesize of input 838 treesize of output 152 [2023-09-01 04:15:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:15:11,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:15:44,955 WARN L222 SmtUtils]: Spent 33.01s on a formula simplification. DAG size of input: 1527 DAG size of output: 354 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-09-01 04:15:44,957 INFO L321 Elim1Store]: treesize reduction 2999, result has 20.6 percent of original size [2023-09-01 04:15:44,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 28 select indices, 28 select index equivalence classes, 0 disjoint index pairs (out of 378 index pairs), introduced 48 new quantified variables, introduced 378 case distinctions, treesize of input 4440 treesize of output 1108 [2023-09-01 04:19:50,860 WARN L222 SmtUtils]: Spent 7.29s on a formula simplification. DAG size of input: 5715 DAG size of output: 5752 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 04:21:54,762 WARN L222 SmtUtils]: Spent 7.55s on a formula simplification. DAG size of input: 5687 DAG size of output: 5791 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 04:22:04,353 WARN L222 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 5638 DAG size of output: 5751 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 04:22:13,517 WARN L222 SmtUtils]: Spent 7.74s on a formula simplification. DAG size of input: 5565 DAG size of output: 5641 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 04:23:47,093 WARN L222 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 5365 DAG size of output: 5386 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15