./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-symm.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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:19:05,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:19:05,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:19:05,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:19:05,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:19:05,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:19:05,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:19:05,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:19:05,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:19:05,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:19:05,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:19:05,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:19:05,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:19:05,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:19:05,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:19:05,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:19:05,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:19:05,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:19:05,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:19:05,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:19:05,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:19:05,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:19:05,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:19:05,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:19:05,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:19:05,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:19:05,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:19:05,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:19:05,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:19:05,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:19:05,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:19:05,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:19:05,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:19:05,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:19:05,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:19:05,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:19:05,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:19:05,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:19:05,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:19:05,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:19:05,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:19:05,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:19:05,532 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:19:05,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:19:05,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:19:05,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:19:05,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:19:05,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:19:05,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:19:05,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:19:05,537 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:19:05,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:19:05,538 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:19:05,538 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:19:05,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:19:05,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:19:05,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:19:05,539 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:19:05,539 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:19:05,539 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:19:05,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:19:05,539 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:19:05,540 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:19:05,540 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:19:05,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:19:05,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:19:05,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:19:05,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:19:05,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:19:05,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:19:05,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:19:05,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:19:05,542 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:19:05,542 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:19:05,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:19:05,542 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:19:05,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:19:05,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:19:05,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:19:05,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:19:05,851 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:19:05,851 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:19:05,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-29 22:19:06,975 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:19:07,157 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:19:07,158 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-29 22:19:07,167 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9008ce272/eab0b45fa407497db53efcd58f8ea9d8/FLAG4d9b5e335 [2023-08-29 22:19:07,178 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9008ce272/eab0b45fa407497db53efcd58f8ea9d8 [2023-08-29 22:19:07,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:19:07,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:19:07,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:19:07,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:19:07,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:19:07,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:19:07" (1/1) ... [2023-08-29 22:19:07,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fc5a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:07, skipping insertion in model container [2023-08-29 22:19:07,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:19:07" (1/1) ... [2023-08-29 22:19:07,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:19:07,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:19:07,338 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/array-eq-symm.wvr.c[2251,2264] [2023-08-29 22:19:07,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:19:07,356 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 22:19:07,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@777f8a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:07, skipping insertion in model container [2023-08-29 22:19:07,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:19:07,357 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:19:07,359 INFO L158 Benchmark]: Toolchain (without parser) took 177.02ms. Allocated memory is still 94.4MB. Free memory was 72.5MB in the beginning and 62.8MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:19:07,359 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory was 42.9MB in the beginning and 42.9MB in the end (delta: 49.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:19:07,360 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.18ms. Allocated memory is still 94.4MB. Free memory was 72.3MB in the beginning and 63.1MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:19:07,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory was 42.9MB in the beginning and 42.9MB in the end (delta: 49.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.18ms. Allocated memory is still 94.4MB. Free memory was 72.3MB in the beginning and 63.1MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: 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/array-eq-symm.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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:19:08,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:19:08,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:19:08,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:19:08,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:19:08,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:19:08,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:19:08,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:19:08,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:19:08,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:19:08,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:19:08,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:19:08,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:19:08,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:19:08,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:19:08,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:19:08,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:19:08,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:19:08,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:19:08,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:19:09,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:19:09,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:19:09,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:19:09,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:19:09,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:19:09,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:19:09,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:19:09,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:19:09,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:19:09,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:19:09,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:19:09,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:19:09,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:19:09,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:19:09,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:19:09,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:19:09,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:19:09,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:19:09,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:19:09,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:19:09,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:19:09,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:19:09,070 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:19:09,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:19:09,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:19:09,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:19:09,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:19:09,072 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:19:09,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:19:09,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:19:09,073 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:19:09,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:19:09,074 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:19:09,074 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:19:09,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:19:09,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:19:09,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:19:09,075 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:19:09,075 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:19:09,075 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:19:09,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:19:09,076 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:19:09,076 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:19:09,076 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:19:09,076 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:19:09,077 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:19:09,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:19:09,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:19:09,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:19:09,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:19:09,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:19:09,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:19:09,078 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:19:09,078 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:19:09,078 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:19:09,079 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:19:09,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:19:09,079 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:19:09,079 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:19:09,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:19:09,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:19:09,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:19:09,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:19:09,390 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:19:09,392 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:19:09,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-29 22:19:10,611 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:19:10,807 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:19:10,807 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-29 22:19:10,813 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0570eb303/215be6dbde304b03a923815132733d53/FLAGb261898b6 [2023-08-29 22:19:10,833 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0570eb303/215be6dbde304b03a923815132733d53 [2023-08-29 22:19:10,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:19:10,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:19:10,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:19:10,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:19:10,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:19:10,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:19:10" (1/1) ... [2023-08-29 22:19:10,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c6df1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:10, skipping insertion in model container [2023-08-29 22:19:10,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:19:10" (1/1) ... [2023-08-29 22:19:10,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:19:10,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:19:11,034 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/array-eq-symm.wvr.c[2251,2264] [2023-08-29 22:19:11,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:19:11,064 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:19:11,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:19:11,097 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/array-eq-symm.wvr.c[2251,2264] [2023-08-29 22:19:11,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:19:11,110 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:19:11,135 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/array-eq-symm.wvr.c[2251,2264] [2023-08-29 22:19:11,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:19:11,160 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:19:11,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11 WrapperNode [2023-08-29 22:19:11,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:19:11,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:19:11,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:19:11,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:19:11,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (1/1) ... [2023-08-29 22:19:11,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (1/1) ... [2023-08-29 22:19:11,214 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 112 [2023-08-29 22:19:11,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:19:11,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:19:11,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:19:11,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:19:11,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (1/1) ... [2023-08-29 22:19:11,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (1/1) ... [2023-08-29 22:19:11,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (1/1) ... [2023-08-29 22:19:11,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (1/1) ... [2023-08-29 22:19:11,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (1/1) ... [2023-08-29 22:19:11,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (1/1) ... [2023-08-29 22:19:11,256 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (1/1) ... [2023-08-29 22:19:11,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (1/1) ... [2023-08-29 22:19:11,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:19:11,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:19:11,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:19:11,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:19:11,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (1/1) ... [2023-08-29 22:19:11,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:19:11,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:19:11,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:19:11,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:19:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:19:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:19:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:19:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:19:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:19:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:19:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:19:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:19:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:19:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:19:11,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:19:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:19:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:19:11,312 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:19:11,401 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:19:11,404 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:19:11,870 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:19:11,877 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:19:11,877 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-29 22:19:11,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:19:11 BoogieIcfgContainer [2023-08-29 22:19:11,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:19:11,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:19:11,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:19:11,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:19:11,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:19:10" (1/3) ... [2023-08-29 22:19:11,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703703a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:19:11, skipping insertion in model container [2023-08-29 22:19:11,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:19:11" (2/3) ... [2023-08-29 22:19:11,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703703a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:19:11, skipping insertion in model container [2023-08-29 22:19:11,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:19:11" (3/3) ... [2023-08-29 22:19:11,885 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-08-29 22:19:11,899 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:19:11,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-08-29 22:19:11,899 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:19:12,012 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 22:19:12,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 183 transitions, 382 flow [2023-08-29 22:19:12,147 INFO L130 PetriNetUnfolder]: 15/181 cut-off events. [2023-08-29 22:19:12,147 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:19:12,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 15/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 234 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2023-08-29 22:19:12,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 183 transitions, 382 flow [2023-08-29 22:19:12,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 177 transitions, 366 flow [2023-08-29 22:19:12,163 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:19:12,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 177 transitions, 366 flow [2023-08-29 22:19:12,178 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 177 transitions, 366 flow [2023-08-29 22:19:12,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 177 transitions, 366 flow [2023-08-29 22:19:12,227 INFO L130 PetriNetUnfolder]: 15/177 cut-off events. [2023-08-29 22:19:12,227 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:19:12,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 236 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2023-08-29 22:19:12,232 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2023-08-29 22:19:25,906 INFO L134 LiptonReduction]: Checked pairs total: 2648 [2023-08-29 22:19:25,907 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-29 22:19:25,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:19:25,922 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;@470d5f12, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:19:25,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-08-29 22:19:25,937 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:19:25,938 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:19:25,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:25,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:19:25,940 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:25,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash 22182, now seen corresponding path program 1 times [2023-08-29 22:19:25,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:25,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811585267] [2023-08-29 22:19:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:25,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:25,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:25,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:25,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 22:19:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:26,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:19:26,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:26,216 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:19:26,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:19:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:26,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:19:26,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:26,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811585267] [2023-08-29 22:19:26,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811585267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:19:26,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:19:26,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:19:26,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161802555] [2023-08-29 22:19:26,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:19:26,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:19:26,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:26,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:19:26,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:19:26,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 375 [2023-08-29 22:19:26,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:26,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:26,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 375 [2023-08-29 22:19:26,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:26,911 INFO L130 PetriNetUnfolder]: 753/1213 cut-off events. [2023-08-29 22:19:26,912 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-29 22:19:26,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1213 events. 753/1213 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 5819 event pairs, 574 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 1106. Up to 609 conditions per place. [2023-08-29 22:19:26,920 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 71 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-08-29 22:19:26,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 75 transitions, 324 flow [2023-08-29 22:19:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:19:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:19:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-08-29 22:19:26,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49422222222222223 [2023-08-29 22:19:26,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-08-29 22:19:26,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-08-29 22:19:26,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:26,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-08-29 22:19:26,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:26,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:26,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:26,947 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 3 states and 556 transitions. [2023-08-29 22:19:26,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 75 transitions, 324 flow [2023-08-29 22:19:26,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 75 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:19:26,953 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 114 flow [2023-08-29 22:19:26,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2023-08-29 22:19:26,957 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-29 22:19:26,957 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 114 flow [2023-08-29 22:19:26,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:26,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:26,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:19:26,967 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 (2)] Ended with exit code 0 [2023-08-29 22:19:27,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:27,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:27,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash 22181, now seen corresponding path program 1 times [2023-08-29 22:19:27,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:27,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392970972] [2023-08-29 22:19:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:27,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:27,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:27,171 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:27,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 22:19:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:27,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:19:27,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:27,283 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:19:27,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:19:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:27,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:19:27,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:27,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392970972] [2023-08-29 22:19:27,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392970972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:19:27,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:19:27,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:19:27,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505510698] [2023-08-29 22:19:27,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:19:27,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:19:27,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:27,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:19:27,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:19:27,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 375 [2023-08-29 22:19:27,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:27,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:27,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 375 [2023-08-29 22:19:27,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:27,679 INFO L130 PetriNetUnfolder]: 753/1209 cut-off events. [2023-08-29 22:19:27,680 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:19:27,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 1209 events. 753/1209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 5832 event pairs, 574 based on Foata normal form. 2/329 useless extension candidates. Maximal degree in co-relation 1214. Up to 1209 conditions per place. [2023-08-29 22:19:27,685 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-29 22:19:27,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 190 flow [2023-08-29 22:19:27,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:19:27,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:19:27,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-29 22:19:27,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45866666666666667 [2023-08-29 22:19:27,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-29 22:19:27,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-29 22:19:27,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:27,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-29 22:19:27,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:27,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:27,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:27,693 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 114 flow. Second operand 3 states and 516 transitions. [2023-08-29 22:19:27,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 190 flow [2023-08-29 22:19:27,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:19:27,695 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 104 flow [2023-08-29 22:19:27,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2023-08-29 22:19:27,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-29 22:19:27,696 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 104 flow [2023-08-29 22:19:27,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:27,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:27,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:19:27,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:19:27,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:27,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:27,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:27,906 INFO L85 PathProgramCache]: Analyzing trace with hash 690091, now seen corresponding path program 1 times [2023-08-29 22:19:27,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:27,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875574356] [2023-08-29 22:19:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:27,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:27,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:27,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:27,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 22:19:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:27,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:19:27,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:19:28,028 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-29 22:19:28,029 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 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-29 22:19:28,081 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:19:28,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:19:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:28,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:19:28,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:28,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875574356] [2023-08-29 22:19:28,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875574356] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:19:28,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:19:28,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:19:28,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159967523] [2023-08-29 22:19:28,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:19:28,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:19:28,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:19:28,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:19:28,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 375 [2023-08-29 22:19:28,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:28,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:28,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 375 [2023-08-29 22:19:28,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:28,481 INFO L130 PetriNetUnfolder]: 573/943 cut-off events. [2023-08-29 22:19:28,481 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 22:19:28,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1916 conditions, 943 events. 573/943 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 4393 event pairs, 432 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 1908. Up to 943 conditions per place. [2023-08-29 22:19:28,485 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-29 22:19:28,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 176 flow [2023-08-29 22:19:28,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:19:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:19:28,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-08-29 22:19:28,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648888888888889 [2023-08-29 22:19:28,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-08-29 22:19:28,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-08-29 22:19:28,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:28,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-08-29 22:19:28,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:28,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:28,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:28,492 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 104 flow. Second operand 3 states and 523 transitions. [2023-08-29 22:19:28,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 176 flow [2023-08-29 22:19:28,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:19:28,493 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 101 flow [2023-08-29 22:19:28,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-29 22:19:28,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2023-08-29 22:19:28,495 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 101 flow [2023-08-29 22:19:28,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:28,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:28,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:19:28,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:19:28,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:28,704 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:28,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:28,705 INFO L85 PathProgramCache]: Analyzing trace with hash 690093, now seen corresponding path program 1 times [2023-08-29 22:19:28,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:28,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079387600] [2023-08-29 22:19:28,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:28,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:28,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:28,707 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:28,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 22:19:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:28,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:19:28,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:28,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:19:28,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:19:28,821 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:19:28,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 22:19:28,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-29 22:19:28,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:19:28,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:19:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:28,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:19:28,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:28,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079387600] [2023-08-29 22:19:28,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079387600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:19:28,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:19:28,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:19:28,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857782940] [2023-08-29 22:19:28,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:19:28,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:19:28,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:28,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:19:28,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:19:29,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 375 [2023-08-29 22:19:29,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:29,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:29,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 375 [2023-08-29 22:19:29,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:29,345 INFO L130 PetriNetUnfolder]: 393/677 cut-off events. [2023-08-29 22:19:29,345 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 22:19:29,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 677 events. 393/677 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3042 event pairs, 290 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 1376. Up to 677 conditions per place. [2023-08-29 22:19:29,349 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-29 22:19:29,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 169 flow [2023-08-29 22:19:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:19:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:19:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-29 22:19:29,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631111111111111 [2023-08-29 22:19:29,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-29 22:19:29,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-29 22:19:29,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:29,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-29 22:19:29,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:29,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:29,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:29,356 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 101 flow. Second operand 3 states and 521 transitions. [2023-08-29 22:19:29,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 169 flow [2023-08-29 22:19:29,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:19:29,358 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 98 flow [2023-08-29 22:19:29,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-08-29 22:19:29,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-08-29 22:19:29,361 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 98 flow [2023-08-29 22:19:29,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:29,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:29,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:19:29,375 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 [2023-08-29 22:19:29,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:29,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:29,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:29,573 INFO L85 PathProgramCache]: Analyzing trace with hash 689550, now seen corresponding path program 1 times [2023-08-29 22:19:29,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:29,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712896095] [2023-08-29 22:19:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:29,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:29,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:29,574 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:29,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 22:19:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:29,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:19:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:29,683 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:19:29,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:19:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:29,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:19:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:29,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:29,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712896095] [2023-08-29 22:19:29,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712896095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:19:29,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:19:29,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:19:29,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377420665] [2023-08-29 22:19:29,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:19:29,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:19:29,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:29,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:19:29,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:19:30,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2023-08-29 22:19:30,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:30,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:30,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2023-08-29 22:19:30,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:31,628 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2023-08-29 22:19:31,628 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-29 22:19:31,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 1022 events. 593/1022 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5030 event pairs, 435 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 2083. Up to 340 conditions per place. [2023-08-29 22:19:31,632 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 86 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2023-08-29 22:19:31,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 101 transitions, 456 flow [2023-08-29 22:19:31,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:19:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:19:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1001 transitions. [2023-08-29 22:19:31,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448888888888889 [2023-08-29 22:19:31,636 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1001 transitions. [2023-08-29 22:19:31,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1001 transitions. [2023-08-29 22:19:31,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:31,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1001 transitions. [2023-08-29 22:19:31,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.83333333333334) internal successors, (1001), 6 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:31,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:31,643 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:31,643 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 98 flow. Second operand 6 states and 1001 transitions. [2023-08-29 22:19:31,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 101 transitions, 456 flow [2023-08-29 22:19:31,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 101 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:19:31,647 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 210 flow [2023-08-29 22:19:31,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-08-29 22:19:31,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-29 22:19:31,650 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 210 flow [2023-08-29 22:19:31,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:31,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:31,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:19:31,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:19:31,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:31,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:31,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:31,861 INFO L85 PathProgramCache]: Analyzing trace with hash 663193595, now seen corresponding path program 1 times [2023-08-29 22:19:31,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:31,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126512679] [2023-08-29 22:19:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:31,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:31,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:31,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:31,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 22:19:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:31,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:19:31,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:31,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:19:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:31,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:19:31,945 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:31,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126512679] [2023-08-29 22:19:31,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126512679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:19:31,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:19:31,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:19:31,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094815884] [2023-08-29 22:19:31,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:19:31,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:19:31,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:31,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:19:31,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:19:32,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 375 [2023-08-29 22:19:32,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:32,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:32,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 375 [2023-08-29 22:19:32,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:32,330 INFO L130 PetriNetUnfolder]: 455/788 cut-off events. [2023-08-29 22:19:32,331 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-29 22:19:32,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 788 events. 455/788 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3603 event pairs, 315 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 1652. Up to 770 conditions per place. [2023-08-29 22:19:32,334 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 41 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-08-29 22:19:32,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 296 flow [2023-08-29 22:19:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:19:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:19:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 645 transitions. [2023-08-29 22:19:32,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2023-08-29 22:19:32,337 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 645 transitions. [2023-08-29 22:19:32,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 645 transitions. [2023-08-29 22:19:32,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:32,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 645 transitions. [2023-08-29 22:19:32,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:32,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:32,341 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:32,341 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 210 flow. Second operand 4 states and 645 transitions. [2023-08-29 22:19:32,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 296 flow [2023-08-29 22:19:32,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 277 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 22:19:32,344 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 195 flow [2023-08-29 22:19:32,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-29 22:19:32,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-29 22:19:32,345 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 195 flow [2023-08-29 22:19:32,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:32,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:32,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:19:32,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 22:19:32,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:32,554 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:32,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:32,555 INFO L85 PathProgramCache]: Analyzing trace with hash 663193558, now seen corresponding path program 1 times [2023-08-29 22:19:32,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:32,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461070351] [2023-08-29 22:19:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:32,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:32,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:32,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:32,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 22:19:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:32,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:19:32,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:32,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:19:32,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:32,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461070351] [2023-08-29 22:19:32,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461070351] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:19:32,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:19:32,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:19:32,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988038322] [2023-08-29 22:19:32,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:19:32,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:19:32,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:32,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:19:32,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:19:32,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 375 [2023-08-29 22:19:32,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 195 flow. Second operand has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:32,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:32,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 375 [2023-08-29 22:19:32,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:33,202 INFO L130 PetriNetUnfolder]: 592/1084 cut-off events. [2023-08-29 22:19:33,203 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-29 22:19:33,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2293 conditions, 1084 events. 592/1084 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5674 event pairs, 426 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 2277. Up to 787 conditions per place. [2023-08-29 22:19:33,207 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 69 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-08-29 22:19:33,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 72 transitions, 443 flow [2023-08-29 22:19:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:19:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:19:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 686 transitions. [2023-08-29 22:19:33,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573333333333333 [2023-08-29 22:19:33,210 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 686 transitions. [2023-08-29 22:19:33,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 686 transitions. [2023-08-29 22:19:33,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:33,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 686 transitions. [2023-08-29 22:19:33,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.5) internal successors, (686), 4 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) [2023-08-29 22:19:33,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:33,214 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:33,214 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 195 flow. Second operand 4 states and 686 transitions. [2023-08-29 22:19:33,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 72 transitions, 443 flow [2023-08-29 22:19:33,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 435 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:19:33,216 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 205 flow [2023-08-29 22:19:33,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-29 22:19:33,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2023-08-29 22:19:33,217 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 205 flow [2023-08-29 22:19:33,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:33,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:33,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:19:33,231 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 (8)] Ended with exit code 0 [2023-08-29 22:19:33,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:33,426 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:33,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:33,427 INFO L85 PathProgramCache]: Analyzing trace with hash 663193646, now seen corresponding path program 1 times [2023-08-29 22:19:33,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:33,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747997520] [2023-08-29 22:19:33,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:33,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:33,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:33,428 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:33,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 22:19:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:33,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:19:33,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:33,523 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 22:19:33,523 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-29 22:19:33,552 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 22:19:33,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 22:19:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:33,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:19:33,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:33,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747997520] [2023-08-29 22:19:33,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747997520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:19:33,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:19:33,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:19:33,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020758158] [2023-08-29 22:19:33,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:19:33,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:19:33,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:19:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:19:33,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-29 22:19:33,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:33,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:33,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-29 22:19:33,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:33,862 INFO L130 PetriNetUnfolder]: 538/976 cut-off events. [2023-08-29 22:19:33,862 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-29 22:19:33,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 976 events. 538/976 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4987 event pairs, 384 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 2219. Up to 976 conditions per place. [2023-08-29 22:19:33,867 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 42 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-29 22:19:33,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 287 flow [2023-08-29 22:19:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:19:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:19:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-29 22:19:33,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45422222222222225 [2023-08-29 22:19:33,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-29 22:19:33,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-29 22:19:33,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:33,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-29 22:19:33,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:33,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:33,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:33,873 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 205 flow. Second operand 3 states and 511 transitions. [2023-08-29 22:19:33,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 287 flow [2023-08-29 22:19:33,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 281 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 22:19:33,875 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 197 flow [2023-08-29 22:19:33,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-29 22:19:33,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2023-08-29 22:19:33,877 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 197 flow [2023-08-29 22:19:33,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:33,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:33,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:19:33,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 22:19:34,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:34,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:34,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:34,090 INFO L85 PathProgramCache]: Analyzing trace with hash 663193647, now seen corresponding path program 1 times [2023-08-29 22:19:34,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:34,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389158192] [2023-08-29 22:19:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:34,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:34,092 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:34,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 22:19:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:19:34,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:34,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:19:34,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:19:34,200 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:19:34,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-29 22:19:34,210 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 [2023-08-29 22:19:34,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:19:34,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:19:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:34,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:19:34,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:34,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389158192] [2023-08-29 22:19:34,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389158192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:19:34,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:19:34,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:19:34,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140633708] [2023-08-29 22:19:34,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:19:34,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:19:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:34,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:19:34,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:19:34,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-29 22:19:34,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:34,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:34,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-29 22:19:34,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:34,672 INFO L130 PetriNetUnfolder]: 484/868 cut-off events. [2023-08-29 22:19:34,672 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 22:19:34,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2006 conditions, 868 events. 484/868 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4269 event pairs, 342 based on Foata normal form. 0/483 useless extension candidates. Maximal degree in co-relation 1988. Up to 868 conditions per place. [2023-08-29 22:19:34,676 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-29 22:19:34,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 275 flow [2023-08-29 22:19:34,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:19:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:19:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-29 22:19:34,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524444444444444 [2023-08-29 22:19:34,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-29 22:19:34,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-29 22:19:34,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:34,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-29 22:19:34,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:34,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:34,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:34,682 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 197 flow. Second operand 3 states and 509 transitions. [2023-08-29 22:19:34,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 275 flow [2023-08-29 22:19:34,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:19:34,684 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 194 flow [2023-08-29 22:19:34,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-29 22:19:34,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-29 22:19:34,685 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 194 flow [2023-08-29 22:19:34,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:34,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:34,686 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:19:34,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:19:34,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:34,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:34,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:34,895 INFO L85 PathProgramCache]: Analyzing trace with hash -930557786, now seen corresponding path program 2 times [2023-08-29 22:19:34,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:34,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204349122] [2023-08-29 22:19:34,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:19:34,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:34,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:34,898 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:34,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 22:19:34,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:19:34,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:19:34,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:19:34,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:35,016 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:19:35,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:19:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:35,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:19:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:19:35,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:35,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204349122] [2023-08-29 22:19:35,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204349122] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:19:35,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:19:35,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:19:35,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936854366] [2023-08-29 22:19:35,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:19:35,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:19:35,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:35,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:19:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:19:39,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-08-29 22:19:39,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 194 flow. Second operand has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:39,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:39,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-08-29 22:19:39,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:41,985 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 [] [2023-08-29 22:19:43,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:19:45,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:19:47,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:19:48,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:19:52,052 INFO L130 PetriNetUnfolder]: 1594/2850 cut-off events. [2023-08-29 22:19:52,052 INFO L131 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2023-08-29 22:19:52,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6461 conditions, 2850 events. 1594/2850 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16241 event pairs, 1140 based on Foata normal form. 18/1581 useless extension candidates. Maximal degree in co-relation 6442. Up to 481 conditions per place. [2023-08-29 22:19:52,065 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 215 selfloop transitions, 32 changer transitions 0/247 dead transitions. [2023-08-29 22:19:52,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 247 transitions, 1320 flow [2023-08-29 22:19:52,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:19:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:19:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2071 transitions. [2023-08-29 22:19:52,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602222222222222 [2023-08-29 22:19:52,072 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2071 transitions. [2023-08-29 22:19:52,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2071 transitions. [2023-08-29 22:19:52,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:52,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2071 transitions. [2023-08-29 22:19:52,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 172.58333333333334) internal successors, (2071), 12 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:52,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:52,084 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:52,084 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 194 flow. Second operand 12 states and 2071 transitions. [2023-08-29 22:19:52,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 247 transitions, 1320 flow [2023-08-29 22:19:52,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 247 transitions, 1319 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:19:52,089 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 438 flow [2023-08-29 22:19:52,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=438, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-08-29 22:19:52,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2023-08-29 22:19:52,090 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 438 flow [2023-08-29 22:19:52,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:52,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:52,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:19:52,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:19:52,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:52,300 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:52,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:52,301 INFO L85 PathProgramCache]: Analyzing trace with hash -930082796, now seen corresponding path program 1 times [2023-08-29 22:19:52,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:52,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324503920] [2023-08-29 22:19:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:52,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:52,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:52,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:52,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 22:19:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:52,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:19:52,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:52,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:19:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:19:52,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:19:52,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:52,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324503920] [2023-08-29 22:19:52,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324503920] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:19:52,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:19:52,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:19:52,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779268336] [2023-08-29 22:19:52,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:19:52,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:19:52,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:52,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:19:52,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:19:52,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 375 [2023-08-29 22:19:52,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 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) [2023-08-29 22:19:52,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:52,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 375 [2023-08-29 22:19:52,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:53,560 INFO L130 PetriNetUnfolder]: 2664/4640 cut-off events. [2023-08-29 22:19:53,561 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2023-08-29 22:19:53,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10561 conditions, 4640 events. 2664/4640 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 28299 event pairs, 990 based on Foata normal form. 0/2519 useless extension candidates. Maximal degree in co-relation 10534. Up to 2392 conditions per place. [2023-08-29 22:19:53,594 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 61 selfloop transitions, 17 changer transitions 0/78 dead transitions. [2023-08-29 22:19:53,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 639 flow [2023-08-29 22:19:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:19:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:19:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 821 transitions. [2023-08-29 22:19:53,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4378666666666667 [2023-08-29 22:19:53,597 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 821 transitions. [2023-08-29 22:19:53,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 821 transitions. [2023-08-29 22:19:53,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:53,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 821 transitions. [2023-08-29 22:19:53,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.2) internal successors, (821), 5 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:53,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:53,603 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:53,603 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 438 flow. Second operand 5 states and 821 transitions. [2023-08-29 22:19:53,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 639 flow [2023-08-29 22:19:53,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 580 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-29 22:19:53,607 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 424 flow [2023-08-29 22:19:53,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-08-29 22:19:53,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2023-08-29 22:19:53,609 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 424 flow [2023-08-29 22:19:53,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 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) [2023-08-29 22:19:53,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:53,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:19:53,621 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 [2023-08-29 22:19:53,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:53,819 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:53,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:53,819 INFO L85 PathProgramCache]: Analyzing trace with hash -930082833, now seen corresponding path program 1 times [2023-08-29 22:19:53,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:53,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35860113] [2023-08-29 22:19:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:53,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:53,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:53,820 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:53,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 22:19:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:53,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:19:53,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:19:53,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:19:53,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:53,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35860113] [2023-08-29 22:19:53,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35860113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:19:53,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:19:53,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:19:53,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960947062] [2023-08-29 22:19:53,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:19:53,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:19:53,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:53,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:19:53,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:19:54,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 375 [2023-08-29 22:19:54,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 424 flow. Second operand has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:54,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:54,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 375 [2023-08-29 22:19:54,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:19:54,843 INFO L130 PetriNetUnfolder]: 2465/4321 cut-off events. [2023-08-29 22:19:54,843 INFO L131 PetriNetUnfolder]: For 433/433 co-relation queries the response was YES. [2023-08-29 22:19:54,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10241 conditions, 4321 events. 2465/4321 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 26606 event pairs, 945 based on Foata normal form. 12/2701 useless extension candidates. Maximal degree in co-relation 10212. Up to 2190 conditions per place. [2023-08-29 22:19:54,862 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 78 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2023-08-29 22:19:54,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 695 flow [2023-08-29 22:19:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:19:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:19:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 844 transitions. [2023-08-29 22:19:54,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45013333333333333 [2023-08-29 22:19:54,865 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 844 transitions. [2023-08-29 22:19:54,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 844 transitions. [2023-08-29 22:19:54,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:19:54,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 844 transitions. [2023-08-29 22:19:54,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:54,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:54,870 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:54,870 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 424 flow. Second operand 5 states and 844 transitions. [2023-08-29 22:19:54,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 695 flow [2023-08-29 22:19:54,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 665 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:19:54,876 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 456 flow [2023-08-29 22:19:54,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-08-29 22:19:54,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2023-08-29 22:19:54,877 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 456 flow [2023-08-29 22:19:54,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:54,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:19:54,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:19:54,885 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 [2023-08-29 22:19:55,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:55,078 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:19:55,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:19:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1231541263, now seen corresponding path program 1 times [2023-08-29 22:19:55,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:19:55,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935994721] [2023-08-29 22:19:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:19:55,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:19:55,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:19:55,081 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:19:55,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 22:19:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:19:55,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:19:55,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:19:55,251 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:19:55,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:19:55,290 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:19:55,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:19:55,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:19:55,434 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 [2023-08-29 22:19:55,465 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:19:55,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:19:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:19:55,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:19:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:19:56,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:19:56,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935994721] [2023-08-29 22:19:56,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935994721] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:19:56,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:19:56,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 22:19:56,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870917624] [2023-08-29 22:19:56,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:19:56,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:19:56,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:19:56,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:19:56,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:19:57,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 375 [2023-08-29 22:19:57,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 456 flow. Second operand has 8 states, 8 states have (on average 140.75) internal successors, (1126), 8 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:19:57,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:19:57,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 375 [2023-08-29 22:19:57,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:20:05,236 INFO L130 PetriNetUnfolder]: 4184/7452 cut-off events. [2023-08-29 22:20:05,236 INFO L131 PetriNetUnfolder]: For 1983/1983 co-relation queries the response was YES. [2023-08-29 22:20:05,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18634 conditions, 7452 events. 4184/7452 cut-off events. For 1983/1983 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 53156 event pairs, 1890 based on Foata normal form. 0/4668 useless extension candidates. Maximal degree in co-relation 18603. Up to 1782 conditions per place. [2023-08-29 22:20:05,269 INFO L137 encePairwiseOnDemand]: 364/375 looper letters, 218 selfloop transitions, 44 changer transitions 0/262 dead transitions. [2023-08-29 22:20:05,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 262 transitions, 1795 flow [2023-08-29 22:20:05,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 22:20:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 22:20:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2442 transitions. [2023-08-29 22:20:05,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407 [2023-08-29 22:20:05,278 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2442 transitions. [2023-08-29 22:20:05,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2442 transitions. [2023-08-29 22:20:05,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:20:05,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2442 transitions. [2023-08-29 22:20:05,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 152.625) internal successors, (2442), 16 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:05,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:05,305 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:05,305 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 456 flow. Second operand 16 states and 2442 transitions. [2023-08-29 22:20:05,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 262 transitions, 1795 flow [2023-08-29 22:20:05,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 262 transitions, 1750 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-29 22:20:05,318 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 883 flow [2023-08-29 22:20:05,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=883, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2023-08-29 22:20:05,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2023-08-29 22:20:05,320 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 883 flow [2023-08-29 22:20:05,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 140.75) internal successors, (1126), 8 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:05,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:20:05,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:20:05,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-29 22:20:05,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:05,531 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:20:05,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:20:05,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1231541262, now seen corresponding path program 1 times [2023-08-29 22:20:05,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:20:05,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916731847] [2023-08-29 22:20:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:20:05,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:05,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:20:05,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:20:05,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 22:20:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:20:05,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:20:05,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:20:05,668 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:20:05,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:20:05,695 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 22:20:05,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 22:20:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:20:05,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:20:05,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:20:05,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916731847] [2023-08-29 22:20:05,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916731847] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:20:05,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:20:05,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:20:05,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367868218] [2023-08-29 22:20:05,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:20:05,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:20:05,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:20:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:20:05,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:20:05,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 375 [2023-08-29 22:20:05,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 883 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:05,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:20:05,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 375 [2023-08-29 22:20:05,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:20:06,570 INFO L130 PetriNetUnfolder]: 2924/5294 cut-off events. [2023-08-29 22:20:06,570 INFO L131 PetriNetUnfolder]: For 8001/8001 co-relation queries the response was YES. [2023-08-29 22:20:06,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15244 conditions, 5294 events. 2924/5294 cut-off events. For 8001/8001 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 34965 event pairs, 2004 based on Foata normal form. 370/4302 useless extension candidates. Maximal degree in co-relation 15200. Up to 5281 conditions per place. [2023-08-29 22:20:06,604 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 76 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2023-08-29 22:20:06,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 88 transitions, 1051 flow [2023-08-29 22:20:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:20:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:20:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 639 transitions. [2023-08-29 22:20:06,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426 [2023-08-29 22:20:06,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 639 transitions. [2023-08-29 22:20:06,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 639 transitions. [2023-08-29 22:20:06,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:20:06,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 639 transitions. [2023-08-29 22:20:06,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:06,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:06,611 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:06,611 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 883 flow. Second operand 4 states and 639 transitions. [2023-08-29 22:20:06,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 88 transitions, 1051 flow [2023-08-29 22:20:06,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 88 transitions, 1041 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-29 22:20:06,647 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 889 flow [2023-08-29 22:20:06,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=889, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-08-29 22:20:06,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2023-08-29 22:20:06,648 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 889 flow [2023-08-29 22:20:06,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:06,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:20:06,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:20:06,658 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 [2023-08-29 22:20:06,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:06,858 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:20:06,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:20:06,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1673948147, now seen corresponding path program 1 times [2023-08-29 22:20:06,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:20:06,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057766593] [2023-08-29 22:20:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:20:06,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:06,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:20:06,861 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:20:06,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 22:20:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:20:06,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:20:06,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:20:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:20:06,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:20:06,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:20:06,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057766593] [2023-08-29 22:20:06,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057766593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:20:06,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:20:06,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:20:07,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215459090] [2023-08-29 22:20:07,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:20:07,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:20:07,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:20:07,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:20:07,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:20:07,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 375 [2023-08-29 22:20:07,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 889 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:07,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:20:07,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 375 [2023-08-29 22:20:07,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:20:07,775 INFO L130 PetriNetUnfolder]: 2744/4994 cut-off events. [2023-08-29 22:20:07,775 INFO L131 PetriNetUnfolder]: For 8348/8348 co-relation queries the response was YES. [2023-08-29 22:20:07,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14474 conditions, 4994 events. 2744/4994 cut-off events. For 8348/8348 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 33198 event pairs, 1884 based on Foata normal form. 0/3812 useless extension candidates. Maximal degree in co-relation 14428. Up to 4700 conditions per place. [2023-08-29 22:20:07,802 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 107 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-08-29 22:20:07,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 110 transitions, 1271 flow [2023-08-29 22:20:07,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:20:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:20:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 671 transitions. [2023-08-29 22:20:07,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44733333333333336 [2023-08-29 22:20:07,805 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 671 transitions. [2023-08-29 22:20:07,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 671 transitions. [2023-08-29 22:20:07,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:20:07,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 671 transitions. [2023-08-29 22:20:07,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:07,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:07,809 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:07,809 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 889 flow. Second operand 4 states and 671 transitions. [2023-08-29 22:20:07,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 110 transitions, 1271 flow [2023-08-29 22:20:07,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 110 transitions, 1258 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:20:07,849 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 889 flow [2023-08-29 22:20:07,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=889, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2023-08-29 22:20:07,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2023-08-29 22:20:07,850 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 889 flow [2023-08-29 22:20:07,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:07,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:20:07,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:20:07,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-29 22:20:08,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:08,060 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:20:08,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:20:08,060 INFO L85 PathProgramCache]: Analyzing trace with hash -456307222, now seen corresponding path program 1 times [2023-08-29 22:20:08,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:20:08,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733965603] [2023-08-29 22:20:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:20:08,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:08,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:20:08,061 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:20:08,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-29 22:20:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:20:08,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:20:08,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:20:08,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:20:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:08,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:20:08,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:20:08,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733965603] [2023-08-29 22:20:08,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733965603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:20:08,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:20:08,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:20:08,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998331827] [2023-08-29 22:20:08,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:20:08,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:20:08,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:20:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:20:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:20:08,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 375 [2023-08-29 22:20:08,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 889 flow. Second operand has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 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) [2023-08-29 22:20:08,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:20:08,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 375 [2023-08-29 22:20:08,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:20:09,400 INFO L130 PetriNetUnfolder]: 4457/7989 cut-off events. [2023-08-29 22:20:09,401 INFO L131 PetriNetUnfolder]: For 14996/14996 co-relation queries the response was YES. [2023-08-29 22:20:09,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24645 conditions, 7989 events. 4457/7989 cut-off events. For 14996/14996 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 57603 event pairs, 1403 based on Foata normal form. 0/6807 useless extension candidates. Maximal degree in co-relation 24598. Up to 4355 conditions per place. [2023-08-29 22:20:09,434 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 81 selfloop transitions, 29 changer transitions 0/110 dead transitions. [2023-08-29 22:20:09,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 110 transitions, 1247 flow [2023-08-29 22:20:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:20:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:20:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 815 transitions. [2023-08-29 22:20:09,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43466666666666665 [2023-08-29 22:20:09,439 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 815 transitions. [2023-08-29 22:20:09,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 815 transitions. [2023-08-29 22:20:09,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:20:09,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 815 transitions. [2023-08-29 22:20:09,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:09,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:09,444 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:09,444 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 889 flow. Second operand 5 states and 815 transitions. [2023-08-29 22:20:09,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 110 transitions, 1247 flow [2023-08-29 22:20:09,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 110 transitions, 1242 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:20:09,487 INFO L231 Difference]: Finished difference. Result has 98 places, 89 transitions, 967 flow [2023-08-29 22:20:09,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=967, PETRI_PLACES=98, PETRI_TRANSITIONS=89} [2023-08-29 22:20:09,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2023-08-29 22:20:09,487 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 89 transitions, 967 flow [2023-08-29 22:20:09,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 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) [2023-08-29 22:20:09,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:20:09,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:20:09,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 22:20:09,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:09,698 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:20:09,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:20:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash -456307189, now seen corresponding path program 1 times [2023-08-29 22:20:09,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:20:09,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17161448] [2023-08-29 22:20:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:20:09,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:09,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:20:09,699 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:20:09,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 22:20:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:20:09,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:20:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:20:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:09,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:20:09,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:20:09,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17161448] [2023-08-29 22:20:09,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17161448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:20:09,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:20:09,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:20:09,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376174593] [2023-08-29 22:20:09,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:20:09,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:20:09,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:20:09,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:20:09,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:20:10,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 375 [2023-08-29 22:20:10,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 89 transitions, 967 flow. Second operand has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:10,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:20:10,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 375 [2023-08-29 22:20:10,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:20:10,969 INFO L130 PetriNetUnfolder]: 4349/7785 cut-off events. [2023-08-29 22:20:10,970 INFO L131 PetriNetUnfolder]: For 17038/17038 co-relation queries the response was YES. [2023-08-29 22:20:10,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25706 conditions, 7785 events. 4349/7785 cut-off events. For 17038/17038 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 55303 event pairs, 1385 based on Foata normal form. 36/7445 useless extension candidates. Maximal degree in co-relation 25658. Up to 4187 conditions per place. [2023-08-29 22:20:11,003 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 101 selfloop transitions, 19 changer transitions 0/120 dead transitions. [2023-08-29 22:20:11,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 120 transitions, 1365 flow [2023-08-29 22:20:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:20:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:20:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 833 transitions. [2023-08-29 22:20:11,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44426666666666664 [2023-08-29 22:20:11,007 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 833 transitions. [2023-08-29 22:20:11,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 833 transitions. [2023-08-29 22:20:11,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:20:11,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 833 transitions. [2023-08-29 22:20:11,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.6) internal successors, (833), 5 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:11,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:11,011 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:11,011 INFO L175 Difference]: Start difference. First operand has 98 places, 89 transitions, 967 flow. Second operand 5 states and 833 transitions. [2023-08-29 22:20:11,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 120 transitions, 1365 flow [2023-08-29 22:20:11,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 120 transitions, 1324 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:20:11,058 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 969 flow [2023-08-29 22:20:11,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=969, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2023-08-29 22:20:11,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2023-08-29 22:20:11,059 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 969 flow [2023-08-29 22:20:11,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:11,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:20:11,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:20:11,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-29 22:20:11,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:11,268 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:20:11,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:20:11,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1899722197, now seen corresponding path program 1 times [2023-08-29 22:20:11,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:20:11,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446057752] [2023-08-29 22:20:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:20:11,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:11,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:20:11,271 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:20:11,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 22:20:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:20:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:20:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:20:11,465 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:20:11,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:20:11,503 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:20:11,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:20:11,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:20:11,600 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 [2023-08-29 22:20:11,609 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:20:11,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:20:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:11,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:20:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:12,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:20:12,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446057752] [2023-08-29 22:20:12,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446057752] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:20:12,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:20:12,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 22:20:12,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276659408] [2023-08-29 22:20:12,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:20:12,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:20:12,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:20:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:20:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:20:15,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 375 [2023-08-29 22:20:15,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 969 flow. Second operand has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:15,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:20:15,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 375 [2023-08-29 22:20:15,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:20:22,449 INFO L130 PetriNetUnfolder]: 5581/10107 cut-off events. [2023-08-29 22:20:22,449 INFO L131 PetriNetUnfolder]: For 25690/25690 co-relation queries the response was YES. [2023-08-29 22:20:22,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34153 conditions, 10107 events. 5581/10107 cut-off events. For 25690/25690 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 76403 event pairs, 2389 based on Foata normal form. 448/10139 useless extension candidates. Maximal degree in co-relation 34104. Up to 4563 conditions per place. [2023-08-29 22:20:22,497 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 207 selfloop transitions, 40 changer transitions 0/247 dead transitions. [2023-08-29 22:20:22,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 247 transitions, 2302 flow [2023-08-29 22:20:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 22:20:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 22:20:22,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2402 transitions. [2023-08-29 22:20:22,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003333333333333 [2023-08-29 22:20:22,504 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2402 transitions. [2023-08-29 22:20:22,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2402 transitions. [2023-08-29 22:20:22,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:20:22,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2402 transitions. [2023-08-29 22:20:22,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 150.125) internal successors, (2402), 16 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:22,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:22,516 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:22,516 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 969 flow. Second operand 16 states and 2402 transitions. [2023-08-29 22:20:22,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 247 transitions, 2302 flow [2023-08-29 22:20:22,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 247 transitions, 2277 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:20:22,574 INFO L231 Difference]: Finished difference. Result has 118 places, 94 transitions, 1098 flow [2023-08-29 22:20:22,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1098, PETRI_PLACES=118, PETRI_TRANSITIONS=94} [2023-08-29 22:20:22,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2023-08-29 22:20:22,575 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 94 transitions, 1098 flow [2023-08-29 22:20:22,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:22,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:20:22,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:20:22,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-29 22:20:22,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:22,776 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:20:22,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:20:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1899766056, now seen corresponding path program 1 times [2023-08-29 22:20:22,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:20:22,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323684392] [2023-08-29 22:20:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:20:22,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:22,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:20:22,777 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:20:22,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 22:20:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:20:22,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:20:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:20:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:22,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:20:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:23,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:20:23,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323684392] [2023-08-29 22:20:23,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323684392] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:20:23,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:20:23,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:20:23,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929731420] [2023-08-29 22:20:23,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:20:23,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:20:23,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:20:23,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:20:23,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:20:23,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-08-29 22:20:23,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 94 transitions, 1098 flow. Second operand has 10 states, 10 states have (on average 153.8) internal successors, (1538), 10 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:23,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:20:23,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-08-29 22:20:23,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:20:25,251 INFO L130 PetriNetUnfolder]: 5123/9387 cut-off events. [2023-08-29 22:20:25,251 INFO L131 PetriNetUnfolder]: For 35724/35724 co-relation queries the response was YES. [2023-08-29 22:20:25,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35022 conditions, 9387 events. 5123/9387 cut-off events. For 35724/35724 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 70846 event pairs, 1809 based on Foata normal form. 402/9789 useless extension candidates. Maximal degree in co-relation 34967. Up to 3858 conditions per place. [2023-08-29 22:20:25,303 INFO L137 encePairwiseOnDemand]: 365/375 looper letters, 146 selfloop transitions, 22 changer transitions 0/168 dead transitions. [2023-08-29 22:20:25,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1888 flow [2023-08-29 22:20:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:20:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:20:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1460 transitions. [2023-08-29 22:20:25,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325925925925926 [2023-08-29 22:20:25,306 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1460 transitions. [2023-08-29 22:20:25,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1460 transitions. [2023-08-29 22:20:25,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:20:25,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1460 transitions. [2023-08-29 22:20:25,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.22222222222223) internal successors, (1460), 9 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:25,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:25,312 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:25,312 INFO L175 Difference]: Start difference. First operand has 118 places, 94 transitions, 1098 flow. Second operand 9 states and 1460 transitions. [2023-08-29 22:20:25,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1888 flow [2023-08-29 22:20:25,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 168 transitions, 1815 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-08-29 22:20:25,411 INFO L231 Difference]: Finished difference. Result has 120 places, 95 transitions, 1162 flow [2023-08-29 22:20:25,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1162, PETRI_PLACES=120, PETRI_TRANSITIONS=95} [2023-08-29 22:20:25,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2023-08-29 22:20:25,412 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 95 transitions, 1162 flow [2023-08-29 22:20:25,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 153.8) internal successors, (1538), 10 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:25,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:20:25,413 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:20:25,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-29 22:20:25,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:25,614 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:20:25,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:20:25,614 INFO L85 PathProgramCache]: Analyzing trace with hash -375743760, now seen corresponding path program 2 times [2023-08-29 22:20:25,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:20:25,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089272610] [2023-08-29 22:20:25,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:20:25,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:25,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:20:25,615 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:20:25,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 22:20:25,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:20:25,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:20:25,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:20:25,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:20:25,758 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:20:25,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:20:25,798 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:20:25,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:20:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:20:25,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:20:25,885 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:20:25,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:20:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:25,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:20:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:28,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:20:28,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089272610] [2023-08-29 22:20:28,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089272610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:20:28,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:20:28,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:20:28,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838247576] [2023-08-29 22:20:28,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:20:28,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:20:28,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:20:28,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:20:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:20:32,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 375 [2023-08-29 22:20:32,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 95 transitions, 1162 flow. Second operand has 12 states, 12 states have (on average 144.66666666666666) internal successors, (1736), 12 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:32,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:20:32,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 375 [2023-08-29 22:20:32,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:20:36,430 INFO L130 PetriNetUnfolder]: 6809/12639 cut-off events. [2023-08-29 22:20:36,430 INFO L131 PetriNetUnfolder]: For 53633/53633 co-relation queries the response was YES. [2023-08-29 22:20:36,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46574 conditions, 12639 events. 6809/12639 cut-off events. For 53633/53633 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 101637 event pairs, 1446 based on Foata normal form. 342/12981 useless extension candidates. Maximal degree in co-relation 46517. Up to 2792 conditions per place. [2023-08-29 22:20:36,494 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 249 selfloop transitions, 31 changer transitions 0/280 dead transitions. [2023-08-29 22:20:36,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 280 transitions, 2656 flow [2023-08-29 22:20:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 22:20:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 22:20:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2206 transitions. [2023-08-29 22:20:36,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42019047619047617 [2023-08-29 22:20:36,497 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2206 transitions. [2023-08-29 22:20:36,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2206 transitions. [2023-08-29 22:20:36,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:20:36,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2206 transitions. [2023-08-29 22:20:36,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 157.57142857142858) internal successors, (2206), 14 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:36,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:36,503 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:36,503 INFO L175 Difference]: Start difference. First operand has 120 places, 95 transitions, 1162 flow. Second operand 14 states and 2206 transitions. [2023-08-29 22:20:36,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 280 transitions, 2656 flow [2023-08-29 22:20:36,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 280 transitions, 2633 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 22:20:36,588 INFO L231 Difference]: Finished difference. Result has 137 places, 102 transitions, 1322 flow [2023-08-29 22:20:36,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1322, PETRI_PLACES=137, PETRI_TRANSITIONS=102} [2023-08-29 22:20:36,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2023-08-29 22:20:36,589 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 102 transitions, 1322 flow [2023-08-29 22:20:36,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 144.66666666666666) internal successors, (1736), 12 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:36,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:20:36,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:20:36,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-29 22:20:36,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:36,800 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:20:36,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:20:36,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1238156902, now seen corresponding path program 1 times [2023-08-29 22:20:36,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:20:36,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627918618] [2023-08-29 22:20:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:20:36,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:36,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:20:36,802 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:20:36,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 22:20:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:20:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:20:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:20:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:36,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:20:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:37,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:20:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627918618] [2023-08-29 22:20:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627918618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:20:37,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:20:37,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:20:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312532085] [2023-08-29 22:20:37,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:20:37,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:20:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:20:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:20:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:20:37,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-08-29 22:20:37,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 102 transitions, 1322 flow. Second operand has 10 states, 10 states have (on average 154.0) internal successors, (1540), 10 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:37,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:20:37,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-08-29 22:20:37,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:20:39,872 INFO L130 PetriNetUnfolder]: 6163/11591 cut-off events. [2023-08-29 22:20:39,872 INFO L131 PetriNetUnfolder]: For 55833/55833 co-relation queries the response was YES. [2023-08-29 22:20:39,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45683 conditions, 11591 events. 6163/11591 cut-off events. For 55833/55833 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 92790 event pairs, 2619 based on Foata normal form. 486/12077 useless extension candidates. Maximal degree in co-relation 45618. Up to 4963 conditions per place. [2023-08-29 22:20:39,937 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 149 selfloop transitions, 23 changer transitions 0/172 dead transitions. [2023-08-29 22:20:39,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 172 transitions, 2122 flow [2023-08-29 22:20:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:20:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:20:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1454 transitions. [2023-08-29 22:20:39,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308148148148148 [2023-08-29 22:20:39,939 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1454 transitions. [2023-08-29 22:20:39,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1454 transitions. [2023-08-29 22:20:39,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:20:39,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1454 transitions. [2023-08-29 22:20:39,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 161.55555555555554) internal successors, (1454), 9 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:39,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:39,944 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:39,944 INFO L175 Difference]: Start difference. First operand has 137 places, 102 transitions, 1322 flow. Second operand 9 states and 1454 transitions. [2023-08-29 22:20:39,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 172 transitions, 2122 flow [2023-08-29 22:20:40,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 172 transitions, 2023 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-08-29 22:20:40,091 INFO L231 Difference]: Finished difference. Result has 139 places, 101 transitions, 1287 flow [2023-08-29 22:20:40,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1287, PETRI_PLACES=139, PETRI_TRANSITIONS=101} [2023-08-29 22:20:40,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2023-08-29 22:20:40,091 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 101 transitions, 1287 flow [2023-08-29 22:20:40,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.0) internal successors, (1540), 10 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:40,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:20:40,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:20:40,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 22:20:40,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:40,292 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:20:40,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:20:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash -375743723, now seen corresponding path program 1 times [2023-08-29 22:20:40,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:20:40,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947300125] [2023-08-29 22:20:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:20:40,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:40,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:20:40,293 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:20:40,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 22:20:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:20:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:20:40,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:20:40,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:20:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:20:40,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:20:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:20:41,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:20:41,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947300125] [2023-08-29 22:20:41,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947300125] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:20:41,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:20:41,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:20:41,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711642731] [2023-08-29 22:20:41,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:20:41,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:20:41,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:20:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:20:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:20:43,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-08-29 22:20:43,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 101 transitions, 1287 flow. Second operand has 12 states, 12 states have (on average 152.5) internal successors, (1830), 12 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:43,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:20:43,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-08-29 22:20:43,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:20:46,903 INFO L130 PetriNetUnfolder]: 9133/16901 cut-off events. [2023-08-29 22:20:46,903 INFO L131 PetriNetUnfolder]: For 101645/101645 co-relation queries the response was YES. [2023-08-29 22:20:46,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72173 conditions, 16901 events. 9133/16901 cut-off events. For 101645/101645 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 136553 event pairs, 468 based on Foata normal form. 594/17495 useless extension candidates. Maximal degree in co-relation 72110. Up to 3339 conditions per place. [2023-08-29 22:20:47,004 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 138 selfloop transitions, 50 changer transitions 0/188 dead transitions. [2023-08-29 22:20:47,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 188 transitions, 2236 flow [2023-08-29 22:20:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:20:47,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:20:47,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1461 transitions. [2023-08-29 22:20:47,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4328888888888889 [2023-08-29 22:20:47,007 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1461 transitions. [2023-08-29 22:20:47,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1461 transitions. [2023-08-29 22:20:47,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:20:47,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1461 transitions. [2023-08-29 22:20:47,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.33333333333334) internal successors, (1461), 9 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:47,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:47,010 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:47,010 INFO L175 Difference]: Start difference. First operand has 139 places, 101 transitions, 1287 flow. Second operand 9 states and 1461 transitions. [2023-08-29 22:20:47,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 188 transitions, 2236 flow [2023-08-29 22:20:47,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 188 transitions, 2220 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:20:47,183 INFO L231 Difference]: Finished difference. Result has 148 places, 113 transitions, 1565 flow [2023-08-29 22:20:47,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1565, PETRI_PLACES=148, PETRI_TRANSITIONS=113} [2023-08-29 22:20:47,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2023-08-29 22:20:47,184 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 113 transitions, 1565 flow [2023-08-29 22:20:47,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.5) internal successors, (1830), 12 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:20:47,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:20:47,184 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:20:47,193 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 (23)] Forceful destruction successful, exit code 0 [2023-08-29 22:20:47,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:47,388 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:20:47,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:20:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1238207822, now seen corresponding path program 2 times [2023-08-29 22:20:47,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:20:47,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607094493] [2023-08-29 22:20:47,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:20:47,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:20:47,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:20:47,389 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:20:47,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-29 22:20:47,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:20:47,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:20:47,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:20:47,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:20:47,571 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:20:47,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:20:47,606 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:20:47,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:20:47,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:20:47,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:20:47,692 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:20:47,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:20:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:47,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:20:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:20:50,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:20:50,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607094493] [2023-08-29 22:20:50,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607094493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:20:50,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:20:50,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:20:50,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512388] [2023-08-29 22:20:50,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:20:50,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:20:50,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:20:50,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:20:50,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:20:52,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:20:54,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:20:56,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:20:59,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:21:04,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:21:05,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 375 [2023-08-29 22:21:05,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 113 transitions, 1565 flow. Second operand has 12 states, 12 states have (on average 139.83333333333334) internal successors, (1678), 12 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:05,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:21:05,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 375 [2023-08-29 22:21:05,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:21:09,967 INFO L130 PetriNetUnfolder]: 10870/20006 cut-off events. [2023-08-29 22:21:09,967 INFO L131 PetriNetUnfolder]: For 151467/151467 co-relation queries the response was YES. [2023-08-29 22:21:10,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88467 conditions, 20006 events. 10870/20006 cut-off events. For 151467/151467 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 170683 event pairs, 3168 based on Foata normal form. 1170/21176 useless extension candidates. Maximal degree in co-relation 88399. Up to 7205 conditions per place. [2023-08-29 22:21:10,106 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 229 selfloop transitions, 35 changer transitions 0/264 dead transitions. [2023-08-29 22:21:10,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 264 transitions, 3188 flow [2023-08-29 22:21:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 22:21:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 22:21:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1677 transitions. [2023-08-29 22:21:10,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40654545454545454 [2023-08-29 22:21:10,110 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1677 transitions. [2023-08-29 22:21:10,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1677 transitions. [2023-08-29 22:21:10,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:21:10,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1677 transitions. [2023-08-29 22:21:10,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 152.45454545454547) internal successors, (1677), 11 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:10,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:10,114 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:10,114 INFO L175 Difference]: Start difference. First operand has 148 places, 113 transitions, 1565 flow. Second operand 11 states and 1677 transitions. [2023-08-29 22:21:10,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 264 transitions, 3188 flow [2023-08-29 22:21:10,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 264 transitions, 3101 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-29 22:21:10,446 INFO L231 Difference]: Finished difference. Result has 158 places, 118 transitions, 1652 flow [2023-08-29 22:21:10,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1652, PETRI_PLACES=158, PETRI_TRANSITIONS=118} [2023-08-29 22:21:10,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2023-08-29 22:21:10,447 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 118 transitions, 1652 flow [2023-08-29 22:21:10,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 139.83333333333334) internal successors, (1678), 12 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:10,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:21:10,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:21:10,455 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 (24)] Ended with exit code 0 [2023-08-29 22:21:10,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:21:10,648 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:21:10,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:21:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1238207789, now seen corresponding path program 1 times [2023-08-29 22:21:10,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:21:10,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380329623] [2023-08-29 22:21:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:21:10,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:21:10,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:21:10,649 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:21:10,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-29 22:21:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:21:10,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:21:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:21:10,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:21:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:21:10,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:21:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 22:21:11,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:21:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380329623] [2023-08-29 22:21:11,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380329623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:21:11,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:21:11,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:21:11,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803893065] [2023-08-29 22:21:11,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:21:11,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:21:11,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:21:11,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:21:11,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:21:13,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 375 [2023-08-29 22:21:13,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 118 transitions, 1652 flow. Second operand has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:13,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:21:13,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 375 [2023-08-29 22:21:13,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:21:18,595 INFO L130 PetriNetUnfolder]: 14848/26684 cut-off events. [2023-08-29 22:21:18,596 INFO L131 PetriNetUnfolder]: For 214103/214103 co-relation queries the response was YES. [2023-08-29 22:21:18,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132024 conditions, 26684 events. 14848/26684 cut-off events. For 214103/214103 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 225949 event pairs, 3168 based on Foata normal form. 1782/28466 useless extension candidates. Maximal degree in co-relation 131952. Up to 7604 conditions per place. [2023-08-29 22:21:18,823 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 162 selfloop transitions, 49 changer transitions 0/211 dead transitions. [2023-08-29 22:21:18,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 211 transitions, 3003 flow [2023-08-29 22:21:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:21:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:21:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1459 transitions. [2023-08-29 22:21:18,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322962962962963 [2023-08-29 22:21:18,828 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1459 transitions. [2023-08-29 22:21:18,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1459 transitions. [2023-08-29 22:21:18,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:21:18,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1459 transitions. [2023-08-29 22:21:18,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.11111111111111) internal successors, (1459), 9 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:18,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:18,831 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:18,831 INFO L175 Difference]: Start difference. First operand has 158 places, 118 transitions, 1652 flow. Second operand 9 states and 1459 transitions. [2023-08-29 22:21:18,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 211 transitions, 3003 flow [2023-08-29 22:21:19,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 211 transitions, 2915 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-08-29 22:21:19,759 INFO L231 Difference]: Finished difference. Result has 165 places, 121 transitions, 1744 flow [2023-08-29 22:21:19,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1744, PETRI_PLACES=165, PETRI_TRANSITIONS=121} [2023-08-29 22:21:19,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2023-08-29 22:21:19,760 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 121 transitions, 1744 flow [2023-08-29 22:21:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:19,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:21:19,761 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:21:19,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-29 22:21:19,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:21:19,971 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:21:19,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:21:19,971 INFO L85 PathProgramCache]: Analyzing trace with hash -270260317, now seen corresponding path program 3 times [2023-08-29 22:21:19,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:21:19,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045729999] [2023-08-29 22:21:19,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:21:19,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:21:19,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:21:19,973 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:21:19,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-29 22:21:20,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:21:20,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:21:20,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:21:20,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:21:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:21:20,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:21:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:21:20,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:21:20,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045729999] [2023-08-29 22:21:20,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045729999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:21:20,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:21:20,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-08-29 22:21:20,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603224656] [2023-08-29 22:21:20,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:21:20,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:21:20,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:21:20,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:21:20,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-08-29 22:21:21,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-08-29 22:21:21,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 121 transitions, 1744 flow. Second operand has 13 states, 13 states have (on average 153.69230769230768) internal successors, (1998), 13 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:21,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:21:21,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-08-29 22:21:21,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:21:25,743 INFO L130 PetriNetUnfolder]: 13870/25058 cut-off events. [2023-08-29 22:21:25,743 INFO L131 PetriNetUnfolder]: For 230789/230789 co-relation queries the response was YES. [2023-08-29 22:21:25,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127487 conditions, 25058 events. 13870/25058 cut-off events. For 230789/230789 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 212611 event pairs, 3168 based on Foata normal form. 66/25124 useless extension candidates. Maximal degree in co-relation 127412. Up to 13009 conditions per place. [2023-08-29 22:21:25,967 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 156 selfloop transitions, 59 changer transitions 0/215 dead transitions. [2023-08-29 22:21:25,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 215 transitions, 2997 flow [2023-08-29 22:21:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 22:21:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 22:21:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1766 transitions. [2023-08-29 22:21:25,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281212121212121 [2023-08-29 22:21:25,971 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1766 transitions. [2023-08-29 22:21:25,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1766 transitions. [2023-08-29 22:21:25,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:21:25,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1766 transitions. [2023-08-29 22:21:25,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 160.54545454545453) internal successors, (1766), 11 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:25,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:25,975 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:25,975 INFO L175 Difference]: Start difference. First operand has 165 places, 121 transitions, 1744 flow. Second operand 11 states and 1766 transitions. [2023-08-29 22:21:25,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 215 transitions, 2997 flow [2023-08-29 22:21:27,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 215 transitions, 2870 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-08-29 22:21:27,574 INFO L231 Difference]: Finished difference. Result has 169 places, 123 transitions, 1796 flow [2023-08-29 22:21:27,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1796, PETRI_PLACES=169, PETRI_TRANSITIONS=123} [2023-08-29 22:21:27,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2023-08-29 22:21:27,575 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 123 transitions, 1796 flow [2023-08-29 22:21:27,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 153.69230769230768) internal successors, (1998), 13 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:21:27,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:21:27,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 22:21:27,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-29 22:21:27,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:21:27,776 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:21:27,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:21:27,776 INFO L85 PathProgramCache]: Analyzing trace with hash -312446599, now seen corresponding path program 3 times [2023-08-29 22:21:27,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:21:27,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614361834] [2023-08-29 22:21:27,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:21:27,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:21:27,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:21:27,778 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:21:27,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-29 22:21:27,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:21:27,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:21:27,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-29 22:21:27,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:21:27,952 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:21:27,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:21:27,991 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:21:27,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:21:28,108 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-29 22:21:28,109 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 21 treesize of output 25 [2023-08-29 22:21:28,144 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:21:28,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:21:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:21:28,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:21:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:21:31,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:21:31,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614361834] [2023-08-29 22:21:31,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614361834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:21:31,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:21:31,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-29 22:21:31,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162953083] [2023-08-29 22:21:31,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:21:31,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:21:31,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:21:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:21:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-08-29 22:21:58,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:22:11,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 375 [2023-08-29 22:22:11,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 123 transitions, 1796 flow. Second operand has 16 states, 16 states have (on average 135.375) internal successors, (2166), 16 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:11,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:11,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 375 [2023-08-29 22:22:11,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:38,186 INFO L130 PetriNetUnfolder]: 14552/26587 cut-off events. [2023-08-29 22:22:38,186 INFO L131 PetriNetUnfolder]: For 228911/228911 co-relation queries the response was YES. [2023-08-29 22:22:38,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126512 conditions, 26587 events. 14552/26587 cut-off events. For 228911/228911 co-relation queries the response was YES. Maximal size of possible extension queue 1011. Compared 231034 event pairs, 7047 based on Foata normal form. 68/26655 useless extension candidates. Maximal degree in co-relation 126438. Up to 7111 conditions per place. [2023-08-29 22:22:38,601 INFO L137 encePairwiseOnDemand]: 363/375 looper letters, 274 selfloop transitions, 122 changer transitions 1/397 dead transitions. [2023-08-29 22:22:38,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 397 transitions, 5031 flow [2023-08-29 22:22:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 22:22:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 22:22:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3450 transitions. [2023-08-29 22:22:38,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2023-08-29 22:22:38,607 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3450 transitions. [2023-08-29 22:22:38,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3450 transitions. [2023-08-29 22:22:38,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:38,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3450 transitions. [2023-08-29 22:22:38,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 143.75) internal successors, (3450), 24 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:38,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:38,615 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:38,615 INFO L175 Difference]: Start difference. First operand has 169 places, 123 transitions, 1796 flow. Second operand 24 states and 3450 transitions. [2023-08-29 22:22:38,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 397 transitions, 5031 flow [2023-08-29 22:22:39,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 397 transitions, 4824 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-08-29 22:22:39,055 INFO L231 Difference]: Finished difference. Result has 191 places, 192 transitions, 3006 flow [2023-08-29 22:22:39,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3006, PETRI_PLACES=191, PETRI_TRANSITIONS=192} [2023-08-29 22:22:39,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2023-08-29 22:22:39,056 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 192 transitions, 3006 flow [2023-08-29 22:22:39,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 135.375) internal successors, (2166), 16 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:39,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:39,057 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 22:22:39,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-29 22:22:39,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:39,257 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:22:39,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:39,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1000527962, now seen corresponding path program 3 times [2023-08-29 22:22:39,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:22:39,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900602437] [2023-08-29 22:22:39,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:22:39,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:22:39,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:22:39,259 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:22:39,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-29 22:22:39,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 22:22:39,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:22:39,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 22:22:39,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:39,480 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:22:39,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:22:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:39,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:22:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:41,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:22:41,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900602437] [2023-08-29 22:22:41,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900602437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:22:41,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:22:41,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 22:22:41,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637522701] [2023-08-29 22:22:41,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:22:41,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 22:22:41,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:22:41,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 22:22:41,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 22:22:59,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-08-29 22:22:59,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 192 transitions, 3006 flow. Second operand has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:59,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:59,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-08-29 22:22:59,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:10,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:12,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:14,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:16,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:18,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:20,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:22,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:24,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:26,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:28,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:40,842 INFO L130 PetriNetUnfolder]: 19595/35700 cut-off events. [2023-08-29 22:23:40,843 INFO L131 PetriNetUnfolder]: For 318946/318946 co-relation queries the response was YES. [2023-08-29 22:23:41,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175953 conditions, 35700 events. 19595/35700 cut-off events. For 318946/318946 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 317890 event pairs, 15934 based on Foata normal form. 24/35724 useless extension candidates. Maximal degree in co-relation 175875. Up to 5583 conditions per place. [2023-08-29 22:23:41,246 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 569 selfloop transitions, 74 changer transitions 0/643 dead transitions. [2023-08-29 22:23:41,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 643 transitions, 9467 flow [2023-08-29 22:23:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 22:23:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 22:23:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3940 transitions. [2023-08-29 22:23:41,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43777777777777777 [2023-08-29 22:23:41,253 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3940 transitions. [2023-08-29 22:23:41,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3940 transitions. [2023-08-29 22:23:41,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:23:41,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3940 transitions. [2023-08-29 22:23:41,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 164.16666666666666) internal successors, (3940), 24 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:41,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:41,264 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:41,264 INFO L175 Difference]: Start difference. First operand has 191 places, 192 transitions, 3006 flow. Second operand 24 states and 3940 transitions. [2023-08-29 22:23:41,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 643 transitions, 9467 flow [2023-08-29 22:23:42,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 643 transitions, 9211 flow, removed 99 selfloop flow, removed 8 redundant places. [2023-08-29 22:23:42,742 INFO L231 Difference]: Finished difference. Result has 219 places, 223 transitions, 3442 flow [2023-08-29 22:23:42,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3442, PETRI_PLACES=219, PETRI_TRANSITIONS=223} [2023-08-29 22:23:42,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2023-08-29 22:23:42,743 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 223 transitions, 3442 flow [2023-08-29 22:23:42,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:42,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:23:42,743 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:23:42,751 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 (28)] Ended with exit code 0 [2023-08-29 22:23:42,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:23:42,944 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:23:42,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:23:42,944 INFO L85 PathProgramCache]: Analyzing trace with hash 213159507, now seen corresponding path program 4 times [2023-08-29 22:23:42,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:23:42,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546135925] [2023-08-29 22:23:42,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:23:42,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:23:42,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:23:42,945 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:23:42,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-29 22:23:43,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:23:43,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:23:43,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:23:43,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:23:43,147 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:23:43,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:23:43,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-29 22:23:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:23:43,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:23:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:23:43,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:23:43,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546135925] [2023-08-29 22:23:43,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546135925] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:23:43,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:23:43,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 22:23:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630959153] [2023-08-29 22:23:43,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:23:43,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:23:43,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:23:43,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:23:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:23:47,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 375 [2023-08-29 22:23:47,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 223 transitions, 3442 flow. Second operand has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:47,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:47,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 375 [2023-08-29 22:23:47,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:57,089 INFO L130 PetriNetUnfolder]: 25305/46758 cut-off events. [2023-08-29 22:23:57,089 INFO L131 PetriNetUnfolder]: For 428559/428559 co-relation queries the response was YES. [2023-08-29 22:23:57,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221515 conditions, 46758 events. 25305/46758 cut-off events. For 428559/428559 co-relation queries the response was YES. Maximal size of possible extension queue 1593. Compared 441667 event pairs, 17033 based on Foata normal form. 1408/48166 useless extension candidates. Maximal degree in co-relation 221427. Up to 32924 conditions per place. [2023-08-29 22:23:57,780 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 399 selfloop transitions, 21 changer transitions 0/420 dead transitions. [2023-08-29 22:23:57,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 420 transitions, 6495 flow [2023-08-29 22:23:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:23:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:23:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1845 transitions. [2023-08-29 22:23:57,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2023-08-29 22:23:57,784 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1845 transitions. [2023-08-29 22:23:57,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1845 transitions. [2023-08-29 22:23:57,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:23:57,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1845 transitions. [2023-08-29 22:23:57,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.75) internal successors, (1845), 12 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:57,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:57,789 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:57,790 INFO L175 Difference]: Start difference. First operand has 219 places, 223 transitions, 3442 flow. Second operand 12 states and 1845 transitions. [2023-08-29 22:23:57,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 420 transitions, 6495 flow [2023-08-29 22:23:59,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 420 transitions, 6260 flow, removed 47 selfloop flow, removed 10 redundant places. [2023-08-29 22:23:59,250 INFO L231 Difference]: Finished difference. Result has 224 places, 229 transitions, 3453 flow [2023-08-29 22:23:59,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3270, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3453, PETRI_PLACES=224, PETRI_TRANSITIONS=229} [2023-08-29 22:23:59,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2023-08-29 22:23:59,251 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 229 transitions, 3453 flow [2023-08-29 22:23:59,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:59,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:23:59,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:23:59,261 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 (29)] Forceful destruction successful, exit code 0 [2023-08-29 22:23:59,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:23:59,457 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:23:59,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:23:59,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1615660288, now seen corresponding path program 1 times [2023-08-29 22:23:59,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:23:59,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105243867] [2023-08-29 22:23:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:23:59,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:23:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:23:59,458 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:23:59,459 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 (30)] Waiting until timeout for monitored process [2023-08-29 22:23:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:23:59,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:23:59,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:23:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:23:59,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:23:59,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:23:59,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105243867] [2023-08-29 22:23:59,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105243867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:23:59,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:23:59,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:23:59,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721637148] [2023-08-29 22:23:59,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:23:59,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:23:59,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:23:59,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:23:59,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:23:59,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-08-29 22:23:59,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 229 transitions, 3453 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:59,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:59,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-08-29 22:23:59,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:24:07,336 INFO L130 PetriNetUnfolder]: 20997/38778 cut-off events. [2023-08-29 22:24:07,336 INFO L131 PetriNetUnfolder]: For 342999/342999 co-relation queries the response was YES. [2023-08-29 22:24:07,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189120 conditions, 38778 events. 20997/38778 cut-off events. For 342999/342999 co-relation queries the response was YES. Maximal size of possible extension queue 1299. Compared 351901 event pairs, 7754 based on Foata normal form. 100/38878 useless extension candidates. Maximal degree in co-relation 189027. Up to 35772 conditions per place. [2023-08-29 22:24:07,825 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 216 selfloop transitions, 30 changer transitions 12/258 dead transitions. [2023-08-29 22:24:07,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 258 transitions, 4308 flow [2023-08-29 22:24:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:24:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:24:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-29 22:24:07,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791111111111111 [2023-08-29 22:24:07,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-29 22:24:07,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-29 22:24:07,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:24:07,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-29 22:24:07,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:07,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:07,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:07,828 INFO L175 Difference]: Start difference. First operand has 224 places, 229 transitions, 3453 flow. Second operand 3 states and 539 transitions. [2023-08-29 22:24:07,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 258 transitions, 4308 flow [2023-08-29 22:24:08,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 258 transitions, 4290 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 22:24:08,912 INFO L231 Difference]: Finished difference. Result has 224 places, 238 transitions, 3644 flow [2023-08-29 22:24:08,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3644, PETRI_PLACES=224, PETRI_TRANSITIONS=238} [2023-08-29 22:24:08,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2023-08-29 22:24:08,913 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 238 transitions, 3644 flow [2023-08-29 22:24:08,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:08,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:24:08,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 22:24:08,923 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 (30)] Forceful destruction successful, exit code 0 [2023-08-29 22:24:09,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:09,117 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:24:09,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:24:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash 170973225, now seen corresponding path program 4 times [2023-08-29 22:24:09,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:24:09,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495132743] [2023-08-29 22:24:09,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:24:09,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:09,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:24:09,119 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:24:09,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-29 22:24:09,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:24:09,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:24:09,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:24:09,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:24:09,308 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:24:09,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:24:09,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-29 22:24:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:24:09,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:24:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:24:09,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:24:09,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495132743] [2023-08-29 22:24:09,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495132743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:24:09,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:24:09,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 22:24:09,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194519830] [2023-08-29 22:24:09,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:24:09,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:24:09,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:24:09,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:24:09,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:24:12,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 375 [2023-08-29 22:24:12,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 238 transitions, 3644 flow. Second operand has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:12,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:24:12,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 375 [2023-08-29 22:24:12,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:24:20,576 INFO L130 PetriNetUnfolder]: 18150/33393 cut-off events. [2023-08-29 22:24:20,577 INFO L131 PetriNetUnfolder]: For 329633/329633 co-relation queries the response was YES. [2023-08-29 22:24:21,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166245 conditions, 33393 events. 18150/33393 cut-off events. For 329633/329633 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 299038 event pairs, 13207 based on Foata normal form. 252/33645 useless extension candidates. Maximal degree in co-relation 166150. Up to 27175 conditions per place. [2023-08-29 22:24:21,147 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 317 selfloop transitions, 31 changer transitions 11/359 dead transitions. [2023-08-29 22:24:21,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 359 transitions, 5297 flow [2023-08-29 22:24:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:24:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:24:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1840 transitions. [2023-08-29 22:24:21,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088888888888889 [2023-08-29 22:24:21,150 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1840 transitions. [2023-08-29 22:24:21,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1840 transitions. [2023-08-29 22:24:21,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:24:21,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1840 transitions. [2023-08-29 22:24:21,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.33333333333334) internal successors, (1840), 12 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:21,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:21,154 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:21,154 INFO L175 Difference]: Start difference. First operand has 224 places, 238 transitions, 3644 flow. Second operand 12 states and 1840 transitions. [2023-08-29 22:24:21,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 359 transitions, 5297 flow [2023-08-29 22:24:22,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 359 transitions, 5172 flow, removed 46 selfloop flow, removed 2 redundant places. [2023-08-29 22:24:22,071 INFO L231 Difference]: Finished difference. Result has 231 places, 247 transitions, 3795 flow [2023-08-29 22:24:22,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3795, PETRI_PLACES=231, PETRI_TRANSITIONS=247} [2023-08-29 22:24:22,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2023-08-29 22:24:22,072 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 247 transitions, 3795 flow [2023-08-29 22:24:22,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 145.71428571428572) internal successors, (2040), 14 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:22,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:24:22,073 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:24:22,080 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 (31)] Ended with exit code 0 [2023-08-29 22:24:22,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:22,273 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:24:22,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:24:22,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1730117227, now seen corresponding path program 5 times [2023-08-29 22:24:22,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:24:22,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844253437] [2023-08-29 22:24:22,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 22:24:22,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:22,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:24:22,275 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:24:22,276 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 (32)] Waiting until timeout for monitored process [2023-08-29 22:24:22,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 22:24:22,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:24:22,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:24:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:24:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:24:22,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:24:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:24:23,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:24:23,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844253437] [2023-08-29 22:24:23,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844253437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:24:23,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:24:23,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-08-29 22:24:23,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545744567] [2023-08-29 22:24:23,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:24:23,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 22:24:23,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:24:23,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 22:24:23,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-08-29 22:24:24,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-08-29 22:24:24,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 247 transitions, 3795 flow. Second operand has 17 states, 17 states have (on average 153.47058823529412) internal successors, (2609), 17 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:24,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:24:24,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-08-29 22:24:24,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:24:32,595 INFO L130 PetriNetUnfolder]: 17331/32044 cut-off events. [2023-08-29 22:24:32,595 INFO L131 PetriNetUnfolder]: For 293122/293122 co-relation queries the response was YES. [2023-08-29 22:24:32,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157319 conditions, 32044 events. 17331/32044 cut-off events. For 293122/293122 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 285952 event pairs, 4446 based on Foata normal form. 140/32184 useless extension candidates. Maximal degree in co-relation 157221. Up to 14792 conditions per place. [2023-08-29 22:24:32,965 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 299 selfloop transitions, 112 changer transitions 0/411 dead transitions. [2023-08-29 22:24:32,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 411 transitions, 6425 flow [2023-08-29 22:24:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 22:24:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 22:24:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2407 transitions. [2023-08-29 22:24:32,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42791111111111113 [2023-08-29 22:24:32,968 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2407 transitions. [2023-08-29 22:24:32,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2407 transitions. [2023-08-29 22:24:32,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:24:32,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2407 transitions. [2023-08-29 22:24:32,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 160.46666666666667) internal successors, (2407), 15 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:32,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 375.0) internal successors, (6000), 16 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:32,976 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 375.0) internal successors, (6000), 16 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:32,976 INFO L175 Difference]: Start difference. First operand has 231 places, 247 transitions, 3795 flow. Second operand 15 states and 2407 transitions. [2023-08-29 22:24:32,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 411 transitions, 6425 flow [2023-08-29 22:24:34,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 411 transitions, 6400 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 22:24:34,179 INFO L231 Difference]: Finished difference. Result has 241 places, 261 transitions, 4249 flow [2023-08-29 22:24:34,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3770, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4249, PETRI_PLACES=241, PETRI_TRANSITIONS=261} [2023-08-29 22:24:34,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2023-08-29 22:24:34,180 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 261 transitions, 4249 flow [2023-08-29 22:24:34,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 153.47058823529412) internal successors, (2609), 17 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:34,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:24:34,180 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 22:24:34,189 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 (32)] Ended with exit code 0 [2023-08-29 22:24:34,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:34,385 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:24:34,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:24:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1687930945, now seen corresponding path program 5 times [2023-08-29 22:24:34,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:24:34,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173307487] [2023-08-29 22:24:34,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 22:24:34,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:34,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:24:34,387 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:24:34,406 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 (33)] Waiting until timeout for monitored process [2023-08-29 22:24:34,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 22:24:34,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:24:34,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 22:24:34,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:24:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:24:34,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:24:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:24:35,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:24:35,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173307487] [2023-08-29 22:24:35,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173307487] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:24:35,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:24:35,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2023-08-29 22:24:35,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866234183] [2023-08-29 22:24:35,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:24:35,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 22:24:35,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:24:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 22:24:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-08-29 22:24:37,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-08-29 22:24:37,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 261 transitions, 4249 flow. Second operand has 18 states, 18 states have (on average 153.38888888888889) internal successors, (2761), 18 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:37,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:24:37,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-08-29 22:24:37,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:24:44,494 INFO L130 PetriNetUnfolder]: 16265/30048 cut-off events. [2023-08-29 22:24:44,494 INFO L131 PetriNetUnfolder]: For 322354/322354 co-relation queries the response was YES. [2023-08-29 22:24:44,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152006 conditions, 30048 events. 16265/30048 cut-off events. For 322354/322354 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 261254 event pairs, 3642 based on Foata normal form. 66/30114 useless extension candidates. Maximal degree in co-relation 151907. Up to 14441 conditions per place. [2023-08-29 22:24:44,963 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 235 selfloop transitions, 103 changer transitions 0/338 dead transitions. [2023-08-29 22:24:44,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 338 transitions, 5238 flow [2023-08-29 22:24:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 22:24:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 22:24:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2252 transitions. [2023-08-29 22:24:44,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428952380952381 [2023-08-29 22:24:44,968 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2252 transitions. [2023-08-29 22:24:44,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2252 transitions. [2023-08-29 22:24:44,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:24:44,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2252 transitions. [2023-08-29 22:24:44,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 160.85714285714286) internal successors, (2252), 14 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:44,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:44,973 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:44,973 INFO L175 Difference]: Start difference. First operand has 241 places, 261 transitions, 4249 flow. Second operand 14 states and 2252 transitions. [2023-08-29 22:24:44,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 338 transitions, 5238 flow [2023-08-29 22:24:45,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 338 transitions, 4990 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-08-29 22:24:45,952 INFO L231 Difference]: Finished difference. Result has 246 places, 242 transitions, 3933 flow [2023-08-29 22:24:45,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3723, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3933, PETRI_PLACES=246, PETRI_TRANSITIONS=242} [2023-08-29 22:24:45,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2023-08-29 22:24:45,953 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 242 transitions, 3933 flow [2023-08-29 22:24:45,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 153.38888888888889) internal successors, (2761), 18 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:24:45,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:24:45,953 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:24:45,961 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 (33)] Ended with exit code 0 [2023-08-29 22:24:46,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:46,154 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:24:46,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:24:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2095321227, now seen corresponding path program 6 times [2023-08-29 22:24:46,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:24:46,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487389810] [2023-08-29 22:24:46,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 22:24:46,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:24:46,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:24:46,155 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:24:46,156 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 (34)] Waiting until timeout for monitored process [2023-08-29 22:24:46,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-29 22:24:46,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:24:46,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:24:46,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:24:46,373 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:24:46,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:24:46,415 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:24:46,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:24:46,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:24:46,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:24:46,559 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:24:46,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:24:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:24:46,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:24:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:24:48,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:24:48,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487389810] [2023-08-29 22:24:48,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487389810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:24:48,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:24:48,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-29 22:24:48,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816728448] [2023-08-29 22:24:48,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:24:48,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:24:48,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:24:48,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:24:48,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-08-29 22:24:50,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:24:53,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:24:56,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:24:58,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:00,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:02,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:08,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:11,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:15,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:16,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 375 [2023-08-29 22:25:16,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 242 transitions, 3933 flow. Second operand has 16 states, 16 states have (on average 135.625) internal successors, (2170), 16 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:16,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:25:16,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 375 [2023-08-29 22:25:16,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:25:30,988 INFO L130 PetriNetUnfolder]: 15489/28712 cut-off events. [2023-08-29 22:25:30,989 INFO L131 PetriNetUnfolder]: For 315942/315942 co-relation queries the response was YES. [2023-08-29 22:25:31,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141132 conditions, 28712 events. 15489/28712 cut-off events. For 315942/315942 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 253796 event pairs, 5902 based on Foata normal form. 560/29272 useless extension candidates. Maximal degree in co-relation 141035. Up to 11525 conditions per place. [2023-08-29 22:25:31,314 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 445 selfloop transitions, 84 changer transitions 0/529 dead transitions. [2023-08-29 22:25:31,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 529 transitions, 7253 flow [2023-08-29 22:25:31,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 22:25:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 22:25:31,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3359 transitions. [2023-08-29 22:25:31,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894492753623188 [2023-08-29 22:25:31,319 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3359 transitions. [2023-08-29 22:25:31,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3359 transitions. [2023-08-29 22:25:31,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:25:31,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3359 transitions. [2023-08-29 22:25:31,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 146.04347826086956) internal successors, (3359), 23 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:31,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 375.0) internal successors, (9000), 24 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:31,329 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 375.0) internal successors, (9000), 24 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:31,329 INFO L175 Difference]: Start difference. First operand has 246 places, 242 transitions, 3933 flow. Second operand 23 states and 3359 transitions. [2023-08-29 22:25:31,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 529 transitions, 7253 flow [2023-08-29 22:25:32,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 529 transitions, 7120 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-29 22:25:32,822 INFO L231 Difference]: Finished difference. Result has 264 places, 243 transitions, 4002 flow [2023-08-29 22:25:32,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3819, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4002, PETRI_PLACES=264, PETRI_TRANSITIONS=243} [2023-08-29 22:25:32,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2023-08-29 22:25:32,822 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 243 transitions, 4002 flow [2023-08-29 22:25:32,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 135.625) internal successors, (2170), 16 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:32,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:25:32,823 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 22:25:32,832 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 (34)] Forceful destruction successful, exit code 0 [2023-08-29 22:25:33,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:25:33,025 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:25:33,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:25:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2053134945, now seen corresponding path program 6 times [2023-08-29 22:25:33,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:25:33,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135325598] [2023-08-29 22:25:33,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 22:25:33,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:25:33,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:25:33,026 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:25:33,028 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 (35)] Waiting until timeout for monitored process [2023-08-29 22:25:33,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-29 22:25:33,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:25:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:25:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:25:33,233 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:25:33,233 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:25:33,274 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:25:33,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:25:33,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:25:33,369 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 [2023-08-29 22:25:33,382 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:25:33,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:25:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:25:33,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:25:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:25:35,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:25:35,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135325598] [2023-08-29 22:25:35,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135325598] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:25:35,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:25:35,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-08-29 22:25:35,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715635232] [2023-08-29 22:25:35,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:25:35,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 22:25:35,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:25:35,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 22:25:35,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-29 22:25:40,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:54,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 22:25:59,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 375 [2023-08-29 22:25:59,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 243 transitions, 4002 flow. Second operand has 17 states, 17 states have (on average 141.52941176470588) internal successors, (2406), 17 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:59,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:25:59,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 375 [2023-08-29 22:25:59,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:26:10,948 INFO L130 PetriNetUnfolder]: 15105/28072 cut-off events. [2023-08-29 22:26:10,948 INFO L131 PetriNetUnfolder]: For 288487/288487 co-relation queries the response was YES. [2023-08-29 22:26:11,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138137 conditions, 28072 events. 15105/28072 cut-off events. For 288487/288487 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 244956 event pairs, 5242 based on Foata normal form. 256/28328 useless extension candidates. Maximal degree in co-relation 138039. Up to 7319 conditions per place. [2023-08-29 22:26:11,298 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 380 selfloop transitions, 103 changer transitions 0/483 dead transitions. [2023-08-29 22:26:11,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 483 transitions, 6623 flow [2023-08-29 22:26:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 22:26:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 22:26:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3193 transitions. [2023-08-29 22:26:11,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40546031746031747 [2023-08-29 22:26:11,302 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3193 transitions. [2023-08-29 22:26:11,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3193 transitions. [2023-08-29 22:26:11,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:26:11,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3193 transitions. [2023-08-29 22:26:11,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 152.04761904761904) internal successors, (3193), 21 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:11,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 375.0) internal successors, (8250), 22 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:11,310 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 375.0) internal successors, (8250), 22 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:11,310 INFO L175 Difference]: Start difference. First operand has 264 places, 243 transitions, 4002 flow. Second operand 21 states and 3193 transitions. [2023-08-29 22:26:11,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 483 transitions, 6623 flow [2023-08-29 22:26:12,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 483 transitions, 6225 flow, removed 30 selfloop flow, removed 17 redundant places. [2023-08-29 22:26:12,128 INFO L231 Difference]: Finished difference. Result has 272 places, 254 transitions, 4213 flow [2023-08-29 22:26:12,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4213, PETRI_PLACES=272, PETRI_TRANSITIONS=254} [2023-08-29 22:26:12,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2023-08-29 22:26:12,129 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 254 transitions, 4213 flow [2023-08-29 22:26:12,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 141.52941176470588) internal successors, (2406), 17 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:12,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:26:12,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:26:12,138 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 (35)] Forceful destruction successful, exit code 0 [2023-08-29 22:26:12,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:26:12,330 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:26:12,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:26:12,331 INFO L85 PathProgramCache]: Analyzing trace with hash 227944711, now seen corresponding path program 1 times [2023-08-29 22:26:12,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:26:12,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011318254] [2023-08-29 22:26:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:26:12,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:26:12,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:26:12,332 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:26:12,333 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 (36)] Waiting until timeout for monitored process [2023-08-29 22:26:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:26:12,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 22:26:12,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:26:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:26:12,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:26:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:26:13,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:26:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011318254] [2023-08-29 22:26:13,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011318254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:26:13,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:26:13,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-29 22:26:13,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142048539] [2023-08-29 22:26:13,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:26:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:26:13,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:26:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:26:13,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:26:14,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2023-08-29 22:26:14,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 254 transitions, 4213 flow. Second operand has 12 states, 12 states have (on average 150.91666666666666) internal successors, (1811), 12 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:14,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:26:14,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2023-08-29 22:26:14,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:26:21,411 INFO L130 PetriNetUnfolder]: 14881/27589 cut-off events. [2023-08-29 22:26:21,411 INFO L131 PetriNetUnfolder]: For 241657/241657 co-relation queries the response was YES. [2023-08-29 22:26:21,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135076 conditions, 27589 events. 14881/27589 cut-off events. For 241657/241657 co-relation queries the response was YES. Maximal size of possible extension queue 918. Compared 237950 event pairs, 2187 based on Foata normal form. 130/27719 useless extension candidates. Maximal degree in co-relation 134976. Up to 10457 conditions per place. [2023-08-29 22:26:21,891 INFO L137 encePairwiseOnDemand]: 363/375 looper letters, 228 selfloop transitions, 125 changer transitions 2/355 dead transitions. [2023-08-29 22:26:21,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 355 transitions, 5734 flow [2023-08-29 22:26:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 22:26:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 22:26:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2498 transitions. [2023-08-29 22:26:21,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41633333333333333 [2023-08-29 22:26:21,894 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2498 transitions. [2023-08-29 22:26:21,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2498 transitions. [2023-08-29 22:26:21,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:26:21,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2498 transitions. [2023-08-29 22:26:21,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 156.125) internal successors, (2498), 16 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:21,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:21,899 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:21,899 INFO L175 Difference]: Start difference. First operand has 272 places, 254 transitions, 4213 flow. Second operand 16 states and 2498 transitions. [2023-08-29 22:26:21,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 355 transitions, 5734 flow [2023-08-29 22:26:22,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 355 transitions, 5595 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-08-29 22:26:22,911 INFO L231 Difference]: Finished difference. Result has 284 places, 258 transitions, 4564 flow [2023-08-29 22:26:22,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4564, PETRI_PLACES=284, PETRI_TRANSITIONS=258} [2023-08-29 22:26:22,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2023-08-29 22:26:22,912 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 258 transitions, 4564 flow [2023-08-29 22:26:22,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 150.91666666666666) internal successors, (1811), 12 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:22,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:26:22,912 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:26:22,920 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 (36)] Forceful destruction successful, exit code 0 [2023-08-29 22:26:23,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:26:23,113 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:26:23,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:26:23,113 INFO L85 PathProgramCache]: Analyzing trace with hash 530451462, now seen corresponding path program 7 times [2023-08-29 22:26:23,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:26:23,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685094714] [2023-08-29 22:26:23,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 22:26:23,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:26:23,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:26:23,115 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:26:23,115 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 (37)] Waiting until timeout for monitored process [2023-08-29 22:26:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:26:23,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 22:26:23,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:26:23,352 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:26:23,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:26:23,460 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 12 [2023-08-29 22:26:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:26:23,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:26:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:26:24,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:26:24,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685094714] [2023-08-29 22:26:24,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685094714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:26:24,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:26:24,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-29 22:26:24,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752880537] [2023-08-29 22:26:24,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:26:24,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 22:26:24,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:26:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 22:26:24,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-29 22:26:29,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 375 [2023-08-29 22:26:29,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 258 transitions, 4564 flow. Second operand has 18 states, 18 states have (on average 145.55555555555554) internal successors, (2620), 18 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:29,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:26:29,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 375 [2023-08-29 22:26:29,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:26:38,893 INFO L130 PetriNetUnfolder]: 17909/33571 cut-off events. [2023-08-29 22:26:38,893 INFO L131 PetriNetUnfolder]: For 365184/365184 co-relation queries the response was YES. [2023-08-29 22:26:39,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174369 conditions, 33571 events. 17909/33571 cut-off events. For 365184/365184 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 306299 event pairs, 10074 based on Foata normal form. 992/34563 useless extension candidates. Maximal degree in co-relation 174264. Up to 17001 conditions per place. [2023-08-29 22:26:39,362 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 458 selfloop transitions, 46 changer transitions 0/504 dead transitions. [2023-08-29 22:26:39,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 504 transitions, 8775 flow [2023-08-29 22:26:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 22:26:39,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 22:26:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2607 transitions. [2023-08-29 22:26:39,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40894117647058825 [2023-08-29 22:26:39,367 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2607 transitions. [2023-08-29 22:26:39,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2607 transitions. [2023-08-29 22:26:39,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:26:39,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2607 transitions. [2023-08-29 22:26:39,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 153.35294117647058) internal successors, (2607), 17 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:39,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 375.0) internal successors, (6750), 18 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:39,496 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 375.0) internal successors, (6750), 18 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:39,497 INFO L175 Difference]: Start difference. First operand has 284 places, 258 transitions, 4564 flow. Second operand 17 states and 2607 transitions. [2023-08-29 22:26:39,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 504 transitions, 8775 flow [2023-08-29 22:26:43,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 504 transitions, 8351 flow, removed 145 selfloop flow, removed 14 redundant places. [2023-08-29 22:26:43,403 INFO L231 Difference]: Finished difference. Result has 289 places, 261 transitions, 4472 flow [2023-08-29 22:26:43,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4327, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4472, PETRI_PLACES=289, PETRI_TRANSITIONS=261} [2023-08-29 22:26:43,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2023-08-29 22:26:43,403 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 261 transitions, 4472 flow [2023-08-29 22:26:43,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.55555555555554) internal successors, (2620), 18 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:43,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:26:43,404 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2023-08-29 22:26:43,413 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 (37)] Forceful destruction successful, exit code 0 [2023-08-29 22:26:43,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:26:43,605 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:26:43,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:26:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1011839140, now seen corresponding path program 1 times [2023-08-29 22:26:43,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:26:43,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172019980] [2023-08-29 22:26:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:26:43,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:26:43,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:26:43,607 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:26:43,609 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 (38)] Waiting until timeout for monitored process [2023-08-29 22:26:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:26:43,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 22:26:43,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:26:43,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 22:26:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:26:44,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:26:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:26:48,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:26:48,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172019980] [2023-08-29 22:26:48,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172019980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:26:48,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:26:48,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-08-29 22:26:48,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411404639] [2023-08-29 22:26:48,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:26:48,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 22:26:48,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:26:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 22:26:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-08-29 22:27:20,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2023-08-29 22:27:20,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 261 transitions, 4472 flow. Second operand has 30 states, 30 states have (on average 150.03333333333333) internal successors, (4501), 30 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:27:20,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:27:20,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2023-08-29 22:27:20,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:27:30,205 WARN L222 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:27:32,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:34,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:36,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:38,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:40,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:42,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:44,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:46,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:48,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:50,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:52,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:54,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:56,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:02,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:50,959 INFO L130 PetriNetUnfolder]: 51353/95686 cut-off events. [2023-08-29 22:28:50,959 INFO L131 PetriNetUnfolder]: For 856325/856325 co-relation queries the response was YES. [2023-08-29 22:28:52,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486989 conditions, 95686 events. 51353/95686 cut-off events. For 856325/856325 co-relation queries the response was YES. Maximal size of possible extension queue 1885. Compared 952418 event pairs, 44025 based on Foata normal form. 75/95761 useless extension candidates. Maximal degree in co-relation 486887. Up to 16678 conditions per place. [2023-08-29 22:28:52,700 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 1596 selfloop transitions, 90 changer transitions 0/1686 dead transitions. [2023-08-29 22:28:52,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1686 transitions, 29500 flow [2023-08-29 22:28:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-29 22:28:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-29 22:28:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5341 transitions. [2023-08-29 22:28:52,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44508333333333333 [2023-08-29 22:28:52,708 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5341 transitions. [2023-08-29 22:28:52,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5341 transitions. [2023-08-29 22:28:52,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:28:52,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5341 transitions. [2023-08-29 22:28:52,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 166.90625) internal successors, (5341), 32 states have internal predecessors, (5341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:28:52,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 375.0) internal successors, (12375), 33 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:28:52,720 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 375.0) internal successors, (12375), 33 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:28:52,720 INFO L175 Difference]: Start difference. First operand has 289 places, 261 transitions, 4472 flow. Second operand 32 states and 5341 transitions. [2023-08-29 22:28:52,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1686 transitions, 29500 flow [2023-08-29 22:29:04,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 1686 transitions, 29228 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-29 22:29:04,559 INFO L231 Difference]: Finished difference. Result has 330 places, 282 transitions, 5094 flow [2023-08-29 22:29:04,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4427, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5094, PETRI_PLACES=330, PETRI_TRANSITIONS=282} [2023-08-29 22:29:04,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2023-08-29 22:29:04,560 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 282 transitions, 5094 flow [2023-08-29 22:29:04,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 150.03333333333333) internal successors, (4501), 30 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:29:04,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:29:04,561 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:29:04,571 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 (38)] Forceful destruction successful, exit code 0 [2023-08-29 22:29:04,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:29:04,769 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:29:04,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:29:04,769 INFO L85 PathProgramCache]: Analyzing trace with hash 552117251, now seen corresponding path program 8 times [2023-08-29 22:29:04,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:29:04,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590116454] [2023-08-29 22:29:04,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:29:04,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:29:04,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:29:04,771 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:29:04,772 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 (39)] Waiting until timeout for monitored process [2023-08-29 22:29:04,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:29:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:29:04,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 22:29:04,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:29:05,028 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-29 22:29:05,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-29 22:29:05,080 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:29:05,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:29:05,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:29:05,227 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 [2023-08-29 22:29:05,236 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 22:29:05,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 22:29:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-29 22:29:05,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:29:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-29 22:29:06,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:29:06,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590116454] [2023-08-29 22:29:06,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590116454] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:29:06,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:29:06,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 22:29:06,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390720449] [2023-08-29 22:29:06,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:29:06,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:29:06,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:29:06,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:29:06,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:29:13,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2023-08-29 22:29:13,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 282 transitions, 5094 flow. Second operand has 14 states, 14 states have (on average 150.85714285714286) internal successors, (2112), 14 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:29:13,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:29:13,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2023-08-29 22:29:13,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:29:53,812 INFO L130 PetriNetUnfolder]: 87017/160726 cut-off events. [2023-08-29 22:29:53,812 INFO L131 PetriNetUnfolder]: For 1492651/1492651 co-relation queries the response was YES. [2023-08-29 22:29:56,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789014 conditions, 160726 events. 87017/160726 cut-off events. For 1492651/1492651 co-relation queries the response was YES. Maximal size of possible extension queue 3058. Compared 1667656 event pairs, 10861 based on Foata normal form. 10416/171142 useless extension candidates. Maximal degree in co-relation 788895. Up to 25606 conditions per place. [2023-08-29 22:29:57,620 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 540 selfloop transitions, 78 changer transitions 0/618 dead transitions. [2023-08-29 22:29:57,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 618 transitions, 11414 flow [2023-08-29 22:29:57,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 22:29:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 22:29:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2105 transitions. [2023-08-29 22:29:57,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317948717948718 [2023-08-29 22:29:57,625 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2105 transitions. [2023-08-29 22:29:57,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2105 transitions. [2023-08-29 22:29:57,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:29:57,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2105 transitions. [2023-08-29 22:29:57,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 161.92307692307693) internal successors, (2105), 13 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:29:57,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:29:57,630 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:29:57,630 INFO L175 Difference]: Start difference. First operand has 330 places, 282 transitions, 5094 flow. Second operand 13 states and 2105 transitions. [2023-08-29 22:29:57,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 618 transitions, 11414 flow [2023-08-29 22:30:22,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 618 transitions, 11131 flow, removed 16 selfloop flow, removed 25 redundant places. [2023-08-29 22:30:22,179 INFO L231 Difference]: Finished difference. Result has 323 places, 287 transitions, 5009 flow [2023-08-29 22:30:22,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4779, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5009, PETRI_PLACES=323, PETRI_TRANSITIONS=287} [2023-08-29 22:30:22,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2023-08-29 22:30:22,180 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 287 transitions, 5009 flow [2023-08-29 22:30:22,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 150.85714285714286) internal successors, (2112), 14 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:30:22,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:30:22,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:30:22,191 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 (39)] Forceful destruction successful, exit code 0 [2023-08-29 22:30:22,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:30:22,385 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 22:30:22,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:30:22,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1526758319, now seen corresponding path program 1 times [2023-08-29 22:30:22,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:30:22,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304304503] [2023-08-29 22:30:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:30:22,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:30:22,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:30:22,386 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:30:22,387 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 (40)] Waiting until timeout for monitored process [2023-08-29 22:30:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:30:22,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-29 22:30:22,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:30:22,585 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 [2023-08-29 22:30:22,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:30:22,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 34 [2023-08-29 22:30:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:30:23,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:30:23,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:30:23,265 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 27 [2023-08-29 22:30:23,306 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 22:30:23,306 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 17 treesize of output 13 [2023-08-29 22:30:30,206 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse8 (select |c_#memory_int| c_~A~0.base)) (.cse7 (bvmul (_ bv4 32) c_~i_AB~0))) (let ((.cse0 (forall ((~B~0.offset (_ BitVec 32)) (~B~0.base (_ BitVec 32)) (~A~0.offset (_ BitVec 32)) (v_ArrVal_1311 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1311) ~B~0.base))) (concat (concat (concat (select .cse9 (bvadd (_ bv3 32) .cse7 ~B~0.offset)) (select .cse9 (bvadd (_ bv2 32) .cse7 ~B~0.offset))) (select .cse9 (bvadd .cse7 ~B~0.offset (_ bv1 32)))) (select .cse9 (bvadd .cse7 ~B~0.offset)))) (concat (concat (concat (select .cse8 (bvadd ~A~0.offset (_ bv3 32) .cse7)) (select .cse8 (bvadd ~A~0.offset (_ bv2 32) .cse7))) (select .cse8 (bvadd ~A~0.offset .cse7 (_ bv1 32)))) (select .cse8 (bvadd ~A~0.offset .cse7)))))))) (and (or .cse0 (bvslt c_~i_BA~0 c_~An~0)) (or (bvslt c_~i_BA~0 c_~Bn~0) .cse0) (forall ((~A~0.offset (_ BitVec 32))) (let ((.cse2 (bvmul (_ bv4 32) c_~i_BA~0))) (let ((.cse1 (bvadd ~A~0.offset .cse2))) (or (not (bvule .cse1 (bvadd (_ bv4 32) ~A~0.offset .cse2))) (forall ((~B~0.offset (_ BitVec 32)) (~B~0.base (_ BitVec 32)) (v_ArrVal_1311 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1311))) (let ((.cse3 (bvadd .cse2 ~B~0.offset)) (.cse4 (select .cse6 ~B~0.base))) (or (not (bvule .cse3 (bvadd (_ bv4 32) .cse2 ~B~0.offset))) (= (concat (concat (concat (select .cse4 (bvadd (_ bv3 32) .cse2 ~B~0.offset)) (select .cse4 (bvadd (_ bv2 32) .cse2 ~B~0.offset))) (select .cse4 (bvadd .cse2 ~B~0.offset (_ bv1 32)))) (select .cse4 .cse3)) (let ((.cse5 (select .cse6 c_~A~0.base))) (concat (concat (concat (select .cse5 (bvadd ~A~0.offset (_ bv3 32) .cse2)) (select .cse5 (bvadd ~A~0.offset (_ bv2 32) .cse2))) (select .cse5 (bvadd ~A~0.offset .cse2 (_ bv1 32)))) (select .cse5 .cse1)))) (not (= (concat (concat (concat (select .cse4 (bvadd (_ bv3 32) .cse7 ~B~0.offset)) (select .cse4 (bvadd (_ bv2 32) .cse7 ~B~0.offset))) (select .cse4 (bvadd .cse7 ~B~0.offset (_ bv1 32)))) (select .cse4 (bvadd .cse7 ~B~0.offset))) (concat (concat (concat (select .cse8 (bvadd ~A~0.offset (_ bv3 32) .cse7)) (select .cse8 (bvadd ~A~0.offset (_ bv2 32) .cse7))) (select .cse8 (bvadd ~A~0.offset .cse7 (_ bv1 32)))) (select .cse8 (bvadd ~A~0.offset .cse7)))))))))))))))) is different from false [2023-08-29 22:30:30,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:30:30,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 678 treesize of output 669 [2023-08-29 22:30:31,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:30:31,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 468 treesize of output 459 [2023-08-29 22:30:31,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:30:31,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 306 treesize of output 198 Killed by 15