./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.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 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:10:44,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:10:44,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:10:44,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:10:44,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:10:44,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:10:44,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:10:44,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:10:44,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:10:44,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:10:44,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:10:44,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:10:44,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:10:44,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:10:44,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:10:44,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:10:44,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:10:44,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:10:44,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:10:44,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:10:44,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:10:44,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:10:44,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:10:44,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:10:44,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:10:44,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:10:44,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:10:44,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:10:44,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:10:44,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:10:44,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:10:44,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:10:44,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:10:44,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:10:44,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:10:44,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:10:44,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:10:44,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:10:44,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:10:44,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:10:44,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:10:44,412 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:10:44,456 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:10:44,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:10:44,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:10:44,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:10:44,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:10:44,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:10:44,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:10:44,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:10:44,459 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:10:44,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:10:44,459 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:10:44,460 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:10:44,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:10:44,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:10:44,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:10:44,460 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:10:44,460 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:10:44,460 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:10:44,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:10:44,461 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:10:44,461 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:10:44,461 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:10:44,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:10:44,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:10:44,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:10:44,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:10:44,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:10:44,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:10:44,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:10:44,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:10:44,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:10:44,463 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:10:44,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:10:44,463 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:10:44,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:10:44,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:10:44,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:10:44,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:10:44,748 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:10:44,749 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:10:44,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-30 06:10:45,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:10:46,072 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:10:46,073 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-30 06:10:46,079 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4cc8abdb/68b2139f5bda42a08214734d5329506c/FLAG1f11c28b2 [2023-08-30 06:10:46,098 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4cc8abdb/68b2139f5bda42a08214734d5329506c [2023-08-30 06:10:46,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:10:46,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:10:46,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:46,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:10:46,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:10:46,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:46" (1/1) ... [2023-08-30 06:10:46,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78aabd5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:46, skipping insertion in model container [2023-08-30 06:10:46,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:46" (1/1) ... [2023-08-30 06:10:46,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:10:46,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:10:46,294 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2023-08-30 06:10:46,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:46,310 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:10:46,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5bc012ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:46, skipping insertion in model container [2023-08-30 06:10:46,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:46,312 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:10:46,314 INFO L158 Benchmark]: Toolchain (without parser) took 211.37ms. Allocated memory is still 71.3MB. Free memory was 39.9MB in the beginning and 45.3MB in the end (delta: -5.4MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-08-30 06:10:46,314 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 52.4MB. Free memory was 29.8MB in the beginning and 29.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:10:46,315 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.43ms. Allocated memory is still 71.3MB. Free memory was 39.7MB in the beginning and 45.6MB in the end (delta: -5.8MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-08-30 06:10:46,316 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 52.4MB. Free memory was 29.8MB in the beginning and 29.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 208.43ms. Allocated memory is still 71.3MB. Free memory was 39.7MB in the beginning and 45.6MB in the end (delta: -5.8MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 165]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.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 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:10:47,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:10:47,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:10:47,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:10:47,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:10:47,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:10:47,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:10:47,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:10:47,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:10:47,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:10:47,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:10:47,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:10:47,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:10:47,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:10:47,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:10:47,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:10:47,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:10:47,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:10:47,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:10:47,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:10:47,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:10:47,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:10:47,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:10:47,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:10:47,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:10:47,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:10:47,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:10:47,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:10:47,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:10:47,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:10:47,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:10:47,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:10:47,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:10:47,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:10:47,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:10:47,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:10:47,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:10:47,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:10:47,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:10:47,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:10:47,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:10:47,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:10:48,024 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:10:48,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:10:48,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:10:48,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:10:48,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:10:48,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:10:48,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:10:48,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:10:48,027 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:10:48,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:10:48,028 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:10:48,028 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:10:48,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:10:48,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:10:48,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:10:48,029 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:10:48,029 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:10:48,029 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:10:48,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:10:48,030 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:10:48,030 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:10:48,030 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:10:48,030 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:10:48,030 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:10:48,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:10:48,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:10:48,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:10:48,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:10:48,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:10:48,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:10:48,032 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:10:48,032 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:10:48,032 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:10:48,032 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:10:48,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:10:48,032 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:10:48,033 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:10:48,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:10:48,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:10:48,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:10:48,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:10:48,314 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:10:48,314 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:10:48,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-30 06:10:49,277 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:10:49,501 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:10:49,501 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c [2023-08-30 06:10:49,508 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff3642709/0629b6c13e644a07aa3414699cd33059/FLAG12a4f91ac [2023-08-30 06:10:49,537 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff3642709/0629b6c13e644a07aa3414699cd33059 [2023-08-30 06:10:49,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:10:49,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:10:49,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:49,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:10:49,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:10:49,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ac5214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49, skipping insertion in model container [2023-08-30 06:10:49,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:10:49,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:10:49,731 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2023-08-30 06:10:49,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:49,753 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:10:49,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:10:49,786 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2023-08-30 06:10:49,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:49,795 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:10:49,811 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2023-08-30 06:10:49,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:49,824 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:10:49,833 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:10:49,838 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:10:49,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49 WrapperNode [2023-08-30 06:10:49,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:49,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:10:49,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:10:49,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:10:49,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,883 INFO L138 Inliner]: procedures = 27, calls = 63, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 317 [2023-08-30 06:10:49,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:10:49,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:10:49,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:10:49,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:10:49,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,906 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:10:49,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:10:49,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:10:49,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:10:49,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (1/1) ... [2023-08-30 06:10:49,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:10:49,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:10:49,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:10:49,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:10:49,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:10:49,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:10:49,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:10:49,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:10:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:10:49,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:10:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:10:49,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:10:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:10:49,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:10:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:10:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:10:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:10:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:10:49,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:10:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:10:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:10:49,973 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:10:50,060 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:10:50,062 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:10:50,622 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:10:50,757 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:10:50,757 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 06:10:50,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:10:50 BoogieIcfgContainer [2023-08-30 06:10:50,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:10:50,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:10:50,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:10:50,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:10:50,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:10:49" (1/3) ... [2023-08-30 06:10:50,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e510369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:10:50, skipping insertion in model container [2023-08-30 06:10:50,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:49" (2/3) ... [2023-08-30 06:10:50,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e510369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:10:50, skipping insertion in model container [2023-08-30 06:10:50,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:10:50" (3/3) ... [2023-08-30 06:10:50,766 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring-nondet.wvr.c [2023-08-30 06:10:50,777 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:10:50,777 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-08-30 06:10:50,777 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:10:50,857 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:10:50,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 292 transitions, 608 flow [2023-08-30 06:10:50,982 INFO L130 PetriNetUnfolder]: 25/289 cut-off events. [2023-08-30 06:10:50,983 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:10:50,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 289 events. 25/289 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 369 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 238. Up to 4 conditions per place. [2023-08-30 06:10:50,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 292 transitions, 608 flow [2023-08-30 06:10:50,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 285 transitions, 588 flow [2023-08-30 06:10:50,999 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:10:51,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 285 transitions, 588 flow [2023-08-30 06:10:51,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 285 transitions, 588 flow [2023-08-30 06:10:51,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 285 transitions, 588 flow [2023-08-30 06:10:51,052 INFO L130 PetriNetUnfolder]: 25/285 cut-off events. [2023-08-30 06:10:51,053 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:10:51,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 285 events. 25/285 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 368 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 238. Up to 4 conditions per place. [2023-08-30 06:10:51,057 INFO L119 LiptonReduction]: Number of co-enabled transitions 4960 [2023-08-30 06:11:18,737 INFO L134 LiptonReduction]: Checked pairs total: 12467 [2023-08-30 06:11:18,738 INFO L136 LiptonReduction]: Total number of compositions: 319 [2023-08-30 06:11:18,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:11:18,751 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;@50a465be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:11:18,751 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-08-30 06:11:18,753 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:11:18,756 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:11:18,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:18,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:11:18,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:18,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:18,760 INFO L85 PathProgramCache]: Analyzing trace with hash 42588, now seen corresponding path program 1 times [2023-08-30 06:11:18,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:18,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916577229] [2023-08-30 06:11:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:18,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:18,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:18,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:18,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:11:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:18,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:11:18,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:18,976 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:11:18,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:11:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:19,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:19,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:19,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916577229] [2023-08-30 06:11:19,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916577229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:19,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:19,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:11:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836853330] [2023-08-30 06:11:19,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:19,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:11:19,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:19,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:11:19,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:11:19,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 611 [2023-08-30 06:11:19,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:19,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:19,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 611 [2023-08-30 06:11:19,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:20,713 INFO L130 PetriNetUnfolder]: 10396/14199 cut-off events. [2023-08-30 06:11:20,714 INFO L131 PetriNetUnfolder]: For 286/286 co-relation queries the response was YES. [2023-08-30 06:11:20,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28694 conditions, 14199 events. 10396/14199 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 73739 event pairs, 8633 based on Foata normal form. 0/5247 useless extension candidates. Maximal degree in co-relation 26920. Up to 14199 conditions per place. [2023-08-30 06:11:20,809 INFO L137 encePairwiseOnDemand]: 604/611 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-30 06:11:20,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 274 flow [2023-08-30 06:11:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 772 transitions. [2023-08-30 06:11:20,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42116748499727225 [2023-08-30 06:11:20,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 772 transitions. [2023-08-30 06:11:20,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 772 transitions. [2023-08-30 06:11:20,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:20,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 772 transitions. [2023-08-30 06:11:20,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:20,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:20,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:20,834 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 158 flow. Second operand 3 states and 772 transitions. [2023-08-30 06:11:20,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 274 flow [2023-08-30 06:11:20,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:11:20,840 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 136 flow [2023-08-30 06:11:20,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2023-08-30 06:11:20,844 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -8 predicate places. [2023-08-30 06:11:20,844 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 136 flow [2023-08-30 06:11:20,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:20,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:20,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:11:20,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:11:21,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:21,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:21,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:21,053 INFO L85 PathProgramCache]: Analyzing trace with hash 42589, now seen corresponding path program 1 times [2023-08-30 06:11:21,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:21,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651124352] [2023-08-30 06:11:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:21,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:21,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:21,054 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:21,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:11:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:21,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:11:21,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:21,233 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:11:21,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:11:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:21,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:21,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:21,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651124352] [2023-08-30 06:11:21,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651124352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:21,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:21,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:11:21,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624841729] [2023-08-30 06:11:21,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:21,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:11:21,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:21,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:11:21,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:11:21,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 611 [2023-08-30 06:11:21,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:21,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:21,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 611 [2023-08-30 06:11:21,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:23,919 INFO L130 PetriNetUnfolder]: 20791/28394 cut-off events. [2023-08-30 06:11:23,919 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-08-30 06:11:23,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57010 conditions, 28394 events. 20791/28394 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 1654. Compared 160316 event pairs, 17266 based on Foata normal form. 0/10493 useless extension candidates. Maximal degree in co-relation 57004. Up to 14200 conditions per place. [2023-08-30 06:11:24,042 INFO L137 encePairwiseOnDemand]: 602/611 looper letters, 118 selfloop transitions, 6 changer transitions 0/124 dead transitions. [2023-08-30 06:11:24,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 124 transitions, 510 flow [2023-08-30 06:11:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 829 transitions. [2023-08-30 06:11:24,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4522640480087289 [2023-08-30 06:11:24,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 829 transitions. [2023-08-30 06:11:24,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 829 transitions. [2023-08-30 06:11:24,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:24,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 829 transitions. [2023-08-30 06:11:24,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:24,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:24,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:24,051 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 136 flow. Second operand 3 states and 829 transitions. [2023-08-30 06:11:24,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 124 transitions, 510 flow [2023-08-30 06:11:24,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 124 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:24,055 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 185 flow [2023-08-30 06:11:24,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2023-08-30 06:11:24,055 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -5 predicate places. [2023-08-30 06:11:24,056 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 185 flow [2023-08-30 06:11:24,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:24,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:24,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:11:24,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-30 06:11:24,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:24,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:24,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1323974, now seen corresponding path program 1 times [2023-08-30 06:11:24,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:24,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110089200] [2023-08-30 06:11:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:24,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:24,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:24,270 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:24,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:11:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:24,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:11:24,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:24,410 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:11:24,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:11:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:24,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:11:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:24,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:24,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110089200] [2023-08-30 06:11:24,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110089200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:11:24,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:11:24,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:11:24,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752964444] [2023-08-30 06:11:24,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:11:24,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:11:24,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:24,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:11:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:11:25,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 611 [2023-08-30 06:11:25,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 220.0) internal successors, (1320), 6 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:25,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:25,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 611 [2023-08-30 06:11:25,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:29,983 INFO L130 PetriNetUnfolder]: 31196/42605 cut-off events. [2023-08-30 06:11:29,984 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-08-30 06:11:30,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85583 conditions, 42605 events. 31196/42605 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 2298. Compared 251888 event pairs, 25899 based on Foata normal form. 0/15760 useless extension candidates. Maximal degree in co-relation 85574. Up to 14201 conditions per place. [2023-08-30 06:11:30,135 INFO L137 encePairwiseOnDemand]: 599/611 looper letters, 173 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2023-08-30 06:11:30,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 200 transitions, 901 flow [2023-08-30 06:11:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:11:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:11:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1523 transitions. [2023-08-30 06:11:30,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154391707583197 [2023-08-30 06:11:30,139 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1523 transitions. [2023-08-30 06:11:30,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1523 transitions. [2023-08-30 06:11:30,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:30,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1523 transitions. [2023-08-30 06:11:30,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 253.83333333333334) internal successors, (1523), 6 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:30,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 611.0) internal successors, (4277), 7 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:30,148 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 611.0) internal successors, (4277), 7 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:30,150 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 185 flow. Second operand 6 states and 1523 transitions. [2023-08-30 06:11:30,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 200 transitions, 901 flow [2023-08-30 06:11:30,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 200 transitions, 877 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:11:30,154 INFO L231 Difference]: Finished difference. Result has 72 places, 90 transitions, 377 flow [2023-08-30 06:11:30,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=72, PETRI_TRANSITIONS=90} [2023-08-30 06:11:30,156 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-30 06:11:30,156 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 90 transitions, 377 flow [2023-08-30 06:11:30,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 220.0) internal successors, (1320), 6 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:30,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:30,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:11:30,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:11:30,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:30,372 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:30,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash 41089879, now seen corresponding path program 1 times [2023-08-30 06:11:30,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:30,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358639504] [2023-08-30 06:11:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:30,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:30,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:30,374 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:30,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:11:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:30,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:11:30,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:30,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:30,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:30,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:30,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:30,546 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 06:11:30,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 06:11:30,569 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:11:30,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 06:11:30,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:30,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:11:30,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 06:11:30,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:30,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:11:30,702 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:11:30,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:11:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:30,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:30,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358639504] [2023-08-30 06:11:30,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358639504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:30,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:30,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:11:30,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152069006] [2023-08-30 06:11:30,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:30,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:11:30,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:11:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:11:31,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 611 [2023-08-30 06:11:31,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 90 transitions, 377 flow. Second operand has 5 states, 5 states have (on average 237.8) internal successors, (1189), 5 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:31,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:31,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 611 [2023-08-30 06:11:31,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:34,272 INFO L130 PetriNetUnfolder]: 23898/33000 cut-off events. [2023-08-30 06:11:34,273 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2023-08-30 06:11:34,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66435 conditions, 33000 events. 23898/33000 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 1956. Compared 194485 event pairs, 19755 based on Foata normal form. 0/13073 useless extension candidates. Maximal degree in co-relation 66422. Up to 33000 conditions per place. [2023-08-30 06:11:34,417 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 85 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-08-30 06:11:34,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 86 transitions, 529 flow [2023-08-30 06:11:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:34,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2023-08-30 06:11:34,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228041462084015 [2023-08-30 06:11:34,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2023-08-30 06:11:34,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2023-08-30 06:11:34,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:34,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2023-08-30 06:11:34,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:34,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:34,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:34,426 INFO L175 Difference]: Start difference. First operand has 72 places, 90 transitions, 377 flow. Second operand 3 states and 775 transitions. [2023-08-30 06:11:34,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 86 transitions, 529 flow [2023-08-30 06:11:34,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 499 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:34,428 INFO L231 Difference]: Finished difference. Result has 71 places, 86 transitions, 329 flow [2023-08-30 06:11:34,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=329, PETRI_PLACES=71, PETRI_TRANSITIONS=86} [2023-08-30 06:11:34,429 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 1 predicate places. [2023-08-30 06:11:34,429 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 329 flow [2023-08-30 06:11:34,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 237.8) internal successors, (1189), 5 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:34,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:34,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:11:34,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:11:34,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:34,637 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:34,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash 41089878, now seen corresponding path program 1 times [2023-08-30 06:11:34,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:34,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904649245] [2023-08-30 06:11:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:34,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:34,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:34,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:34,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:11:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:34,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:11:34,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:34,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:34,846 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 06:11:34,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 06:11:35,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:35,067 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-30 06:11:35,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 06:11:37,369 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-30 06:11:37,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-30 06:11:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:39,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:39,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:39,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904649245] [2023-08-30 06:11:39,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904649245] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:39,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:39,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:11:39,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467213007] [2023-08-30 06:11:39,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:39,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:11:39,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:11:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2023-08-30 06:11:41,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:11:43,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:11:45,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:11:47,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:11:49,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:11:52,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:11:52,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 611 [2023-08-30 06:11:52,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 86 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:52,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:52,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 611 [2023-08-30 06:11:52,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:57,407 INFO L130 PetriNetUnfolder]: 16600/23395 cut-off events. [2023-08-30 06:11:57,407 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-30 06:11:57,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47199 conditions, 23395 events. 16600/23395 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 136615 event pairs, 13611 based on Foata normal form. 0/10385 useless extension candidates. Maximal degree in co-relation 47185. Up to 23395 conditions per place. [2023-08-30 06:11:57,505 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-30 06:11:57,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 82 transitions, 473 flow [2023-08-30 06:11:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-08-30 06:11:57,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37424986361156576 [2023-08-30 06:11:57,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-08-30 06:11:57,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-08-30 06:11:57,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:57,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-08-30 06:11:57,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:57,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:57,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:57,513 INFO L175 Difference]: Start difference. First operand has 71 places, 86 transitions, 329 flow. Second operand 3 states and 686 transitions. [2023-08-30 06:11:57,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 82 transitions, 473 flow [2023-08-30 06:11:57,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 82 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:57,515 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 310 flow [2023-08-30 06:11:57,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2023-08-30 06:11:57,516 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-08-30 06:11:57,516 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 310 flow [2023-08-30 06:11:57,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:57,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:57,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:11:57,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:11:57,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:57,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:11:57,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:57,724 INFO L85 PathProgramCache]: Analyzing trace with hash 832697774, now seen corresponding path program 1 times [2023-08-30 06:11:57,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:57,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289674772] [2023-08-30 06:11:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:57,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:57,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:57,725 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:57,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:11:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:57,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:11:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:57,877 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 06:11:57,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 06:11:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:11:57,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:11:57,969 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:11:57,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:11:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:57,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:57,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:57,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289674772] [2023-08-30 06:11:57,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289674772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:57,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:57,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:11:57,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755054068] [2023-08-30 06:11:57,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:57,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:11:57,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:11:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:11:58,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 611 [2023-08-30 06:11:58,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:58,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:58,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 611 [2023-08-30 06:11:58,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:59,840 INFO L130 PetriNetUnfolder]: 16174/22741 cut-off events. [2023-08-30 06:11:59,840 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-30 06:11:59,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45892 conditions, 22741 events. 16174/22741 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1292. Compared 131503 event pairs, 13242 based on Foata normal form. 0/10226 useless extension candidates. Maximal degree in co-relation 45877. Up to 22741 conditions per place. [2023-08-30 06:11:59,933 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 79 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-30 06:11:59,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 466 flow [2023-08-30 06:11:59,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 783 transitions. [2023-08-30 06:11:59,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42716857610474634 [2023-08-30 06:11:59,936 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 783 transitions. [2023-08-30 06:11:59,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 783 transitions. [2023-08-30 06:11:59,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:59,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 783 transitions. [2023-08-30 06:11:59,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:59,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:59,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:59,940 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 310 flow. Second operand 3 states and 783 transitions. [2023-08-30 06:11:59,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 466 flow [2023-08-30 06:11:59,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 80 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:11:59,941 INFO L231 Difference]: Finished difference. Result has 69 places, 80 transitions, 307 flow [2023-08-30 06:11:59,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=69, PETRI_TRANSITIONS=80} [2023-08-30 06:11:59,942 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2023-08-30 06:11:59,942 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 80 transitions, 307 flow [2023-08-30 06:11:59,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:59,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:59,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:11:59,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:12:00,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:00,153 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:12:00,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:00,153 INFO L85 PathProgramCache]: Analyzing trace with hash 832697773, now seen corresponding path program 1 times [2023-08-30 06:12:00,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:00,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805555365] [2023-08-30 06:12:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:00,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:00,154 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:00,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:12:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:00,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:12:00,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:00,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:00,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:00,296 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 06:12:00,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 06:12:00,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 06:12:00,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:00,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:12:00,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:00,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:12:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:12:00,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:12:00,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:00,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805555365] [2023-08-30 06:12:00,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805555365] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:12:00,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:12:00,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:12:00,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512849299] [2023-08-30 06:12:00,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:12:00,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:12:00,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:00,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:12:00,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:12:00,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 611 [2023-08-30 06:12:00,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 80 transitions, 307 flow. Second operand has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:00,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:00,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 611 [2023-08-30 06:12:00,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:12:02,193 INFO L130 PetriNetUnfolder]: 15748/22087 cut-off events. [2023-08-30 06:12:02,193 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-30 06:12:02,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44585 conditions, 22087 events. 15748/22087 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 127157 event pairs, 12873 based on Foata normal form. 0/10067 useless extension candidates. Maximal degree in co-relation 44569. Up to 22087 conditions per place. [2023-08-30 06:12:02,280 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 77 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-08-30 06:12:02,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 459 flow [2023-08-30 06:12:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:12:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:12:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 781 transitions. [2023-08-30 06:12:02,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260774686306601 [2023-08-30 06:12:02,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 781 transitions. [2023-08-30 06:12:02,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 781 transitions. [2023-08-30 06:12:02,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:02,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 781 transitions. [2023-08-30 06:12:02,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:02,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:02,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:02,287 INFO L175 Difference]: Start difference. First operand has 69 places, 80 transitions, 307 flow. Second operand 3 states and 781 transitions. [2023-08-30 06:12:02,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 459 flow [2023-08-30 06:12:02,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:12:02,289 INFO L231 Difference]: Finished difference. Result has 68 places, 78 transitions, 304 flow [2023-08-30 06:12:02,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=68, PETRI_TRANSITIONS=78} [2023-08-30 06:12:02,289 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -2 predicate places. [2023-08-30 06:12:02,290 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 78 transitions, 304 flow [2023-08-30 06:12:02,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:02,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:02,290 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:12:02,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:12:02,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:02,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:12:02,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:02,491 INFO L85 PathProgramCache]: Analyzing trace with hash 791492765, now seen corresponding path program 2 times [2023-08-30 06:12:02,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:02,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403410908] [2023-08-30 06:12:02,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:12:02,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:02,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:02,493 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:02,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:12:02,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:12:02,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:12:02,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:12:02,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:02,651 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:12:02,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:12:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:12:02,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:12:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:12:03,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:03,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403410908] [2023-08-30 06:12:03,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403410908] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:12:03,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:12:03,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:12:03,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553338484] [2023-08-30 06:12:03,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:12:03,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:12:03,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:03,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:12:03,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:12:07,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 611 [2023-08-30 06:12:07,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 78 transitions, 304 flow. Second operand has 12 states, 12 states have (on average 223.0) internal successors, (2676), 12 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:07,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:07,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 611 [2023-08-30 06:12:07,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:12:09,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:10,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:12,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:14,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:16,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:17,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:20,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:22,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:24,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:26,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:37,358 INFO L130 PetriNetUnfolder]: 52474/73581 cut-off events. [2023-08-30 06:12:37,358 INFO L131 PetriNetUnfolder]: For 636/636 co-relation queries the response was YES. [2023-08-30 06:12:37,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148413 conditions, 73581 events. 52474/73581 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 2148. Compared 467032 event pairs, 42910 based on Foata normal form. 17/33524 useless extension candidates. Maximal degree in co-relation 148396. Up to 7680 conditions per place. [2023-08-30 06:12:37,758 INFO L137 encePairwiseOnDemand]: 601/611 looper letters, 478 selfloop transitions, 53 changer transitions 0/531 dead transitions. [2023-08-30 06:12:37,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 531 transitions, 2486 flow [2023-08-30 06:12:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:12:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:12:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3878 transitions. [2023-08-30 06:12:37,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231314784506274 [2023-08-30 06:12:37,767 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3878 transitions. [2023-08-30 06:12:37,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3878 transitions. [2023-08-30 06:12:37,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:37,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3878 transitions. [2023-08-30 06:12:37,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 258.53333333333336) internal successors, (3878), 15 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:37,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 611.0) internal successors, (9776), 16 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:37,782 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 611.0) internal successors, (9776), 16 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:37,782 INFO L175 Difference]: Start difference. First operand has 68 places, 78 transitions, 304 flow. Second operand 15 states and 3878 transitions. [2023-08-30 06:12:37,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 531 transitions, 2486 flow [2023-08-30 06:12:37,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 531 transitions, 2485 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:12:37,788 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 703 flow [2023-08-30 06:12:37,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=703, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2023-08-30 06:12:37,788 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 21 predicate places. [2023-08-30 06:12:37,789 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 703 flow [2023-08-30 06:12:37,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 223.0) internal successors, (2676), 12 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:37,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:37,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:12:37,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-08-30 06:12:37,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:37,997 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:12:37,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:37,997 INFO L85 PathProgramCache]: Analyzing trace with hash 43826958, now seen corresponding path program 1 times [2023-08-30 06:12:37,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:37,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155739827] [2023-08-30 06:12:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:37,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:37,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:37,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:38,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:12:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:38,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:12:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:12:38,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:12:38,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:38,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155739827] [2023-08-30 06:12:38,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155739827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:12:38,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:12:38,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:12:38,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530951960] [2023-08-30 06:12:38,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:12:38,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:12:38,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:12:38,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:12:38,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 611 [2023-08-30 06:12:38,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 703 flow. Second operand has 4 states, 4 states have (on average 236.75) internal successors, (947), 4 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:38,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:38,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 611 [2023-08-30 06:12:38,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:12:44,957 INFO L130 PetriNetUnfolder]: 53636/75618 cut-off events. [2023-08-30 06:12:44,957 INFO L131 PetriNetUnfolder]: For 785/785 co-relation queries the response was YES. [2023-08-30 06:12:45,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152869 conditions, 75618 events. 53636/75618 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 2303. Compared 489470 event pairs, 43980 based on Foata normal form. 820/35895 useless extension candidates. Maximal degree in co-relation 152841. Up to 73580 conditions per place. [2023-08-30 06:12:45,389 INFO L137 encePairwiseOnDemand]: 597/611 looper letters, 164 selfloop transitions, 3 changer transitions 1/168 dead transitions. [2023-08-30 06:12:45,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 168 transitions, 1455 flow [2023-08-30 06:12:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:12:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:12:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1033 transitions. [2023-08-30 06:12:45,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42266775777414073 [2023-08-30 06:12:45,392 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1033 transitions. [2023-08-30 06:12:45,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1033 transitions. [2023-08-30 06:12:45,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:45,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1033 transitions. [2023-08-30 06:12:45,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:45,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 611.0) internal successors, (3055), 5 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:45,396 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 611.0) internal successors, (3055), 5 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:45,396 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 703 flow. Second operand 4 states and 1033 transitions. [2023-08-30 06:12:45,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 168 transitions, 1455 flow [2023-08-30 06:12:45,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 168 transitions, 1290 flow, removed 41 selfloop flow, removed 4 redundant places. [2023-08-30 06:12:45,401 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 630 flow [2023-08-30 06:12:45,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=630, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2023-08-30 06:12:45,401 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 21 predicate places. [2023-08-30 06:12:45,402 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 630 flow [2023-08-30 06:12:45,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 236.75) internal successors, (947), 4 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:45,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:45,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:12:45,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:12:45,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:45,609 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:12:45,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:45,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1358673432, now seen corresponding path program 1 times [2023-08-30 06:12:45,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:45,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887054185] [2023-08-30 06:12:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:45,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:45,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:45,610 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:45,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:12:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:12:45,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:45,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:45,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:45,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:45,780 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 06:12:45,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 06:12:45,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 06:12:45,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:45,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:12:45,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:45,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 06:12:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:12:45,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:12:45,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:45,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887054185] [2023-08-30 06:12:45,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887054185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:12:45,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:12:45,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:12:45,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877808828] [2023-08-30 06:12:45,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:12:45,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:12:45,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:45,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:12:45,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:12:46,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 611 [2023-08-30 06:12:46,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 630 flow. Second operand has 5 states, 5 states have (on average 240.6) internal successors, (1203), 5 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:46,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:46,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 611 [2023-08-30 06:12:46,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:12:52,818 INFO L130 PetriNetUnfolder]: 51436/72338 cut-off events. [2023-08-30 06:12:52,818 INFO L131 PetriNetUnfolder]: For 4266/4266 co-relation queries the response was YES. [2023-08-30 06:12:53,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167651 conditions, 72338 events. 51436/72338 cut-off events. For 4266/4266 co-relation queries the response was YES. Maximal size of possible extension queue 2243. Compared 464075 event pairs, 42150 based on Foata normal form. 0/34248 useless extension candidates. Maximal degree in co-relation 167621. Up to 72338 conditions per place. [2023-08-30 06:12:53,245 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 107 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-08-30 06:12:53,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 108 transitions, 842 flow [2023-08-30 06:12:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:12:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:12:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-08-30 06:12:53,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217130387343153 [2023-08-30 06:12:53,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-08-30 06:12:53,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-08-30 06:12:53,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:53,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-08-30 06:12:53,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:53,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:53,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:53,252 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 630 flow. Second operand 3 states and 773 transitions. [2023-08-30 06:12:53,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 108 transitions, 842 flow [2023-08-30 06:12:53,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 108 transitions, 836 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 06:12:53,259 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 622 flow [2023-08-30 06:12:53,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=622, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2023-08-30 06:12:53,259 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 20 predicate places. [2023-08-30 06:12:53,260 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 622 flow [2023-08-30 06:12:53,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 240.6) internal successors, (1203), 5 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:53,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:53,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:12:53,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:12:53,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:53,467 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:12:53,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1358673431, now seen corresponding path program 1 times [2023-08-30 06:12:53,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:53,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875043935] [2023-08-30 06:12:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:53,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:53,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:53,469 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:53,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:12:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:53,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:12:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:53,621 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 06:12:53,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 06:12:53,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:53,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:12:53,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:12:53,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:12:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:12:53,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:12:53,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:53,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875043935] [2023-08-30 06:12:53,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875043935] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:12:53,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:12:53,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:12:53,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854897599] [2023-08-30 06:12:53,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:12:53,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:12:53,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:53,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:12:53,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:12:54,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 611 [2023-08-30 06:12:54,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 622 flow. Second operand has 5 states, 5 states have (on average 236.6) internal successors, (1183), 5 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:54,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:54,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 611 [2023-08-30 06:12:54,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:13:00,718 INFO L130 PetriNetUnfolder]: 49236/69058 cut-off events. [2023-08-30 06:13:00,718 INFO L131 PetriNetUnfolder]: For 4298/4298 co-relation queries the response was YES. [2023-08-30 06:13:00,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160009 conditions, 69058 events. 49236/69058 cut-off events. For 4298/4298 co-relation queries the response was YES. Maximal size of possible extension queue 2076. Compared 438491 event pairs, 40320 based on Foata normal form. 0/33418 useless extension candidates. Maximal degree in co-relation 159978. Up to 69058 conditions per place. [2023-08-30 06:13:01,180 INFO L137 encePairwiseOnDemand]: 608/611 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-08-30 06:13:01,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 830 flow [2023-08-30 06:13:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:13:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:13:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 759 transitions. [2023-08-30 06:13:01,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41407528641571195 [2023-08-30 06:13:01,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 759 transitions. [2023-08-30 06:13:01,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 759 transitions. [2023-08-30 06:13:01,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:13:01,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 759 transitions. [2023-08-30 06:13:01,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:01,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:01,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 611.0) internal successors, (2444), 4 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:01,187 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 622 flow. Second operand 3 states and 759 transitions. [2023-08-30 06:13:01,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 106 transitions, 830 flow [2023-08-30 06:13:01,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 106 transitions, 829 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:13:01,192 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 619 flow [2023-08-30 06:13:01,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=619, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2023-08-30 06:13:01,193 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 19 predicate places. [2023-08-30 06:13:01,193 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 619 flow [2023-08-30 06:13:01,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 236.6) internal successors, (1183), 5 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:01,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:13:01,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:13:01,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:13:01,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:01,401 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:13:01,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:13:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1692805877, now seen corresponding path program 1 times [2023-08-30 06:13:01,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:13:01,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024176074] [2023-08-30 06:13:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:13:01,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:01,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:13:01,403 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:13:01,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:13:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:13:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 06:13:01,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:13:01,548 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:13:01,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:13:01,575 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 06:13:01,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 06:13:01,592 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:13:01,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:13:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:13:01,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:13:01,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:13:01,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024176074] [2023-08-30 06:13:01,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024176074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:13:01,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:13:01,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:13:01,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99519212] [2023-08-30 06:13:01,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:13:01,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:13:01,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:13:01,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:13:01,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:13:01,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 611 [2023-08-30 06:13:01,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 619 flow. Second operand has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 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) [2023-08-30 06:13:01,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:13:01,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 611 [2023-08-30 06:13:01,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:13:06,701 INFO L130 PetriNetUnfolder]: 37076/52018 cut-off events. [2023-08-30 06:13:06,701 INFO L131 PetriNetUnfolder]: For 3758/3758 co-relation queries the response was YES. [2023-08-30 06:13:06,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118250 conditions, 52018 events. 37076/52018 cut-off events. For 3758/3758 co-relation queries the response was YES. Maximal size of possible extension queue 1525. Compared 317403 event pairs, 29600 based on Foata normal form. 0/27018 useless extension candidates. Maximal degree in co-relation 118218. Up to 52005 conditions per place. [2023-08-30 06:13:07,080 INFO L137 encePairwiseOnDemand]: 606/611 looper letters, 91 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2023-08-30 06:13:07,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 103 transitions, 813 flow [2023-08-30 06:13:07,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:13:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:13:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 972 transitions. [2023-08-30 06:13:07,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397708674304419 [2023-08-30 06:13:07,083 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 972 transitions. [2023-08-30 06:13:07,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 972 transitions. [2023-08-30 06:13:07,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:13:07,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 972 transitions. [2023-08-30 06:13:07,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:07,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 611.0) internal successors, (3055), 5 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:07,087 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 611.0) internal successors, (3055), 5 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:07,087 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 619 flow. Second operand 4 states and 972 transitions. [2023-08-30 06:13:07,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 103 transitions, 813 flow [2023-08-30 06:13:07,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 812 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:13:07,092 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 630 flow [2023-08-30 06:13:07,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=630, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2023-08-30 06:13:07,092 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 18 predicate places. [2023-08-30 06:13:07,093 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 630 flow [2023-08-30 06:13:07,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 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) [2023-08-30 06:13:07,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:13:07,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:13:07,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:13:07,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:07,301 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:13:07,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:13:07,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1692805959, now seen corresponding path program 1 times [2023-08-30 06:13:07,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:13:07,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807572300] [2023-08-30 06:13:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:13:07,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:07,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:13:07,303 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:13:07,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:13:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:13:07,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 06:13:07,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:13:07,516 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:13:07,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 06:13:07,603 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:13:07,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 06:13:07,739 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 06:13:07,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 06:13:07,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:13:07,786 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:13:07,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:13:07,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:13:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:13:07,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:13:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:13:15,976 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:13:15,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807572300] [2023-08-30 06:13:15,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807572300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:13:15,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:13:15,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2023-08-30 06:13:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85330989] [2023-08-30 06:13:15,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:13:15,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 06:13:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:13:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 06:13:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2023-08-30 06:13:23,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:26,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:30,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:33,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:36,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:39,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:40,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:43,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:45,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:48,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:51,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:53,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:13:57,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:14:02,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:14:05,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:14:09,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:14:12,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:14:15,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 611 [2023-08-30 06:14:15,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 630 flow. Second operand has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:15,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:14:15,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 611 [2023-08-30 06:14:15,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:14:26,914 WARN L222 SmtUtils]: Spent 11.34s on a formula simplification. DAG size of input: 78 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:14:34,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:14:46,885 WARN L222 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:14:57,374 WARN L222 SmtUtils]: Spent 8.51s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:15:10,106 WARN L222 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:15:22,602 INFO L130 PetriNetUnfolder]: 88240/123132 cut-off events. [2023-08-30 06:15:22,602 INFO L131 PetriNetUnfolder]: For 9826/9826 co-relation queries the response was YES. [2023-08-30 06:15:23,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275910 conditions, 123132 events. 88240/123132 cut-off events. For 9826/9826 co-relation queries the response was YES. Maximal size of possible extension queue 3302. Compared 821286 event pairs, 68740 based on Foata normal form. 0/66532 useless extension candidates. Maximal degree in co-relation 275877. Up to 50081 conditions per place. [2023-08-30 06:15:23,518 INFO L137 encePairwiseOnDemand]: 598/611 looper letters, 247 selfloop transitions, 48 changer transitions 0/295 dead transitions. [2023-08-30 06:15:23,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 295 transitions, 2134 flow [2023-08-30 06:15:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:15:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:15:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3061 transitions. [2023-08-30 06:15:23,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33398799781778504 [2023-08-30 06:15:23,525 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3061 transitions. [2023-08-30 06:15:23,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3061 transitions. [2023-08-30 06:15:23,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:15:23,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3061 transitions. [2023-08-30 06:15:23,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 204.06666666666666) internal successors, (3061), 15 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:23,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 611.0) internal successors, (9776), 16 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:23,536 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 611.0) internal successors, (9776), 16 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:23,536 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 630 flow. Second operand 15 states and 3061 transitions. [2023-08-30 06:15:23,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 295 transitions, 2134 flow [2023-08-30 06:15:23,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 295 transitions, 2121 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:15:23,545 INFO L231 Difference]: Finished difference. Result has 106 places, 135 transitions, 1098 flow [2023-08-30 06:15:23,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1098, PETRI_PLACES=106, PETRI_TRANSITIONS=135} [2023-08-30 06:15:23,546 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 36 predicate places. [2023-08-30 06:15:23,546 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 135 transitions, 1098 flow [2023-08-30 06:15:23,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:23,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:15:23,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:15:23,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-08-30 06:15:23,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:15:23,754 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:15:23,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:15:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash 937378372, now seen corresponding path program 1 times [2023-08-30 06:15:23,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:15:23,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851122788] [2023-08-30 06:15:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:15:23,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:15:23,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:15:23,757 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:15:23,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:15:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:15:23,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:15:23,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:15:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:15:23,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:15:23,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:15:23,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851122788] [2023-08-30 06:15:23,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851122788] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:15:23,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:15:23,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:15:23,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794208652] [2023-08-30 06:15:23,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:15:23,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:15:23,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:15:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:15:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:15:23,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 611 [2023-08-30 06:15:23,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 135 transitions, 1098 flow. Second operand has 4 states, 4 states have (on average 244.25) internal successors, (977), 4 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:23,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:15:23,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 611 [2023-08-30 06:15:23,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:15:54,195 INFO L130 PetriNetUnfolder]: 205740/286292 cut-off events. [2023-08-30 06:15:54,195 INFO L131 PetriNetUnfolder]: For 98574/98574 co-relation queries the response was YES. [2023-08-30 06:15:55,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687332 conditions, 286292 events. 205740/286292 cut-off events. For 98574/98574 co-relation queries the response was YES. Maximal size of possible extension queue 7894. Compared 2138569 event pairs, 35160 based on Foata normal form. 5760/163672 useless extension candidates. Maximal degree in co-relation 687293. Up to 101521 conditions per place. [2023-08-30 06:15:56,635 INFO L137 encePairwiseOnDemand]: 602/611 looper letters, 210 selfloop transitions, 10 changer transitions 0/220 dead transitions. [2023-08-30 06:15:56,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 220 transitions, 1819 flow [2023-08-30 06:15:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:15:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:15:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1350 transitions. [2023-08-30 06:15:56,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44189852700491 [2023-08-30 06:15:56,638 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1350 transitions. [2023-08-30 06:15:56,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1350 transitions. [2023-08-30 06:15:56,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:15:56,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1350 transitions. [2023-08-30 06:15:56,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:56,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 611.0) internal successors, (3666), 6 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:56,642 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 611.0) internal successors, (3666), 6 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:56,642 INFO L175 Difference]: Start difference. First operand has 106 places, 135 transitions, 1098 flow. Second operand 5 states and 1350 transitions. [2023-08-30 06:15:56,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 220 transitions, 1819 flow [2023-08-30 06:15:56,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 220 transitions, 1798 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 06:15:56,806 INFO L231 Difference]: Finished difference. Result has 113 places, 144 transitions, 1185 flow [2023-08-30 06:15:56,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=611, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1185, PETRI_PLACES=113, PETRI_TRANSITIONS=144} [2023-08-30 06:15:56,806 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 43 predicate places. [2023-08-30 06:15:56,806 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 144 transitions, 1185 flow [2023-08-30 06:15:56,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 244.25) internal successors, (977), 4 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:56,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:15:56,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:15:56,815 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 [2023-08-30 06:15:57,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:15:57,009 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 06:15:57,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:15:57,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1004917343, now seen corresponding path program 1 times [2023-08-30 06:15:57,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:15:57,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397326623] [2023-08-30 06:15:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:15:57,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:15:57,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:15:57,011 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:15:57,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:15:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:15:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:15:57,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:15:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:15:57,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:15:57,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:15:57,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397326623] [2023-08-30 06:15:57,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397326623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:15:57,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:15:57,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:15:57,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019146956] [2023-08-30 06:15:57,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:15:57,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:15:57,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:15:57,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:15:57,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:15:57,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 611 [2023-08-30 06:15:57,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 144 transitions, 1185 flow. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:15:57,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:15:57,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 611 [2023-08-30 06:15:57,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand