./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:54:54,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:54:54,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:54:54,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:54:54,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:54:54,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:54:54,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:54:54,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:54:54,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:54:54,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:54:54,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:54:54,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:54:54,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:54:54,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:54:54,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:54:54,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:54:54,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:54:54,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:54:54,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:54:54,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:54:54,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:54:54,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:54:54,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:54:54,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:54:54,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:54:54,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:54:54,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:54:54,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:54:54,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:54:54,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:54:54,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:54:54,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:54:54,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:54:54,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:54:54,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:54:54,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:54:54,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:54:54,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:54:54,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:54:54,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:54:54,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:54:54,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:54:54,560 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:54:54,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:54:54,562 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:54:54,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:54:54,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:54:54,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:54:54,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:54:54,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:54:54,564 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:54:54,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:54:54,565 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:54:54,565 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:54:54,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:54:54,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:54:54,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:54:54,566 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:54:54,566 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:54:54,566 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:54:54,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:54:54,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:54:54,567 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:54:54,567 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:54:54,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:54:54,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:54:54,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:54:54,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:54:54,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:54:54,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:54:54,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:54:54,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:54:54,569 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:54:54,569 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:54:54,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:54:54,569 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:54:54,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:54:54,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:54:54,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:54:54,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:54:54,855 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:54:54,855 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:54:54,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-29 23:54:56,053 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:54:56,275 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:54:56,275 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-29 23:54:56,281 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8369547/945a6961a6ca4effbe74e3dcca9f4105/FLAGa48b4a806 [2023-08-29 23:54:56,293 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8369547/945a6961a6ca4effbe74e3dcca9f4105 [2023-08-29 23:54:56,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:54:56,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:54:56,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:54:56,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:54:56,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:54:56,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:54:56" (1/1) ... [2023-08-29 23:54:56,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@469066f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:56, skipping insertion in model container [2023-08-29 23:54:56,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:54:56" (1/1) ... [2023-08-29 23:54:56,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:54:56,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:54:56,484 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3947,3960] [2023-08-29 23:54:56,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:54:56,504 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:54:56,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@237ed3b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:54:56, skipping insertion in model container [2023-08-29 23:54:56,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:54:56,507 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:54:56,510 INFO L158 Benchmark]: Toolchain (without parser) took 211.43ms. Allocated memory is still 73.4MB. Free memory was 51.6MB in the beginning and 41.3MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:54:56,510 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 56.6MB. Free memory was 34.5MB in the beginning and 34.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:54:56,511 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.54ms. Allocated memory is still 73.4MB. Free memory was 51.3MB in the beginning and 41.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-29 23:54:56,513 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 56.6MB. Free memory was 34.5MB in the beginning and 34.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 209.54ms. Allocated memory is still 73.4MB. Free memory was 51.3MB in the beginning and 41.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:54:58,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:54:58,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:54:58,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:54:58,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:54:58,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:54:58,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:54:58,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:54:58,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:54:58,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:54:58,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:54:58,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:54:58,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:54:58,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:54:58,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:54:58,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:54:58,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:54:58,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:54:58,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:54:58,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:54:58,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:54:58,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:54:58,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:54:58,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:54:58,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:54:58,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:54:58,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:54:58,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:54:58,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:54:58,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:54:58,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:54:58,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:54:58,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:54:58,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:54:58,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:54:58,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:54:58,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:54:58,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:54:58,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:54:58,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:54:58,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:54:58,245 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:54:58,279 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:54:58,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:54:58,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:54:58,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:54:58,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:54:58,282 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:54:58,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:54:58,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:54:58,283 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:54:58,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:54:58,284 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:54:58,284 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:54:58,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:54:58,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:54:58,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:54:58,285 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:54:58,285 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:54:58,286 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:54:58,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:54:58,286 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:54:58,286 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:54:58,286 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:54:58,286 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:54:58,287 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:54:58,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:54:58,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:54:58,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:54:58,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:54:58,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:54:58,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:54:58,288 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:54:58,288 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:54:58,289 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:54:58,289 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:54:58,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:54:58,289 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:54:58,290 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:54:58,290 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:54:58,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:54:58,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:54:58,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:54:58,603 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:54:58,603 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:54:58,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-29 23:54:59,761 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:54:59,980 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:54:59,980 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-29 23:54:59,988 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da25b04ff/d3e8a03aa04b48aa860402e0accbede2/FLAG735cabbca [2023-08-29 23:55:00,013 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da25b04ff/d3e8a03aa04b48aa860402e0accbede2 [2023-08-29 23:55:00,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:55:00,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:55:00,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:55:00,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:55:00,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:55:00,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b4e636d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00, skipping insertion in model container [2023-08-29 23:55:00,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:55:00,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:55:00,203 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3947,3960] [2023-08-29 23:55:00,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:55:00,222 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:55:00,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:55:00,240 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3947,3960] [2023-08-29 23:55:00,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:55:00,264 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:55:00,298 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3947,3960] [2023-08-29 23:55:00,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:55:00,322 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:55:00,325 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:55:00,331 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:55:00,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00 WrapperNode [2023-08-29 23:55:00,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:55:00,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:55:00,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:55:00,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:55:00,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,401 INFO L138 Inliner]: procedures = 27, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2023-08-29 23:55:00,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:55:00,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:55:00,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:55:00,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:55:00,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,466 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:55:00,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:55:00,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:55:00,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:55:00,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (1/1) ... [2023-08-29 23:55:00,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:55:00,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:55:00,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:55:00,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:55:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:55:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:55:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:55:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:55:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:55:00,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:55:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:55:00,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:55:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:55:00,547 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:55:00,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:55:00,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:55:00,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:55:00,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:55:00,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:55:00,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:55:00,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:55:00,549 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:55:00,714 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:55:00,716 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:55:01,436 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:55:01,632 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:55:01,632 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 23:55:01,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:55:01 BoogieIcfgContainer [2023-08-29 23:55:01,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:55:01,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:55:01,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:55:01,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:55:01,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:55:00" (1/3) ... [2023-08-29 23:55:01,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527737b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:55:01, skipping insertion in model container [2023-08-29 23:55:01,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:55:00" (2/3) ... [2023-08-29 23:55:01,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527737b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:55:01, skipping insertion in model container [2023-08-29 23:55:01,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:55:01" (3/3) ... [2023-08-29 23:55:01,649 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-08-29 23:55:01,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:55:01,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-08-29 23:55:01,665 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:55:01,776 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 23:55:01,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 281 transitions, 586 flow [2023-08-29 23:55:01,947 INFO L130 PetriNetUnfolder]: 22/278 cut-off events. [2023-08-29 23:55:01,948 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:55:01,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 278 events. 22/278 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 305 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 227. Up to 3 conditions per place. [2023-08-29 23:55:01,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 281 transitions, 586 flow [2023-08-29 23:55:01,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 274 transitions, 566 flow [2023-08-29 23:55:01,973 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:55:01,986 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 274 transitions, 566 flow [2023-08-29 23:55:01,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 274 transitions, 566 flow [2023-08-29 23:55:01,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 274 transitions, 566 flow [2023-08-29 23:55:02,054 INFO L130 PetriNetUnfolder]: 22/274 cut-off events. [2023-08-29 23:55:02,055 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:55:02,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 274 events. 22/274 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 306 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 227. Up to 3 conditions per place. [2023-08-29 23:55:02,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 3794 [2023-08-29 23:55:30,089 INFO L134 LiptonReduction]: Checked pairs total: 7895 [2023-08-29 23:55:30,090 INFO L136 LiptonReduction]: Total number of compositions: 293 [2023-08-29 23:55:30,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:55:30,107 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;@2df0fc8a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:55:30,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-08-29 23:55:30,110 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:55:30,110 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:55:30,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:30,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:55:30,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:30,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash 41322, now seen corresponding path program 1 times [2023-08-29 23:55:30,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:30,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919738804] [2023-08-29 23:55:30,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:30,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:30,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:30,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:30,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:55:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:30,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:55:30,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:30,400 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:55:30,401 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:55:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:30,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:30,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:30,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919738804] [2023-08-29 23:55:30,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919738804] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:30,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:30,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:55:30,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666272456] [2023-08-29 23:55:30,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:30,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:55:30,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:30,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:55:30,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:55:30,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 574 [2023-08-29 23:55:30,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:30,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:30,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 574 [2023-08-29 23:55:30,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:33,968 INFO L130 PetriNetUnfolder]: 16535/22976 cut-off events. [2023-08-29 23:55:33,968 INFO L131 PetriNetUnfolder]: For 536/536 co-relation queries the response was YES. [2023-08-29 23:55:33,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46467 conditions, 22976 events. 16535/22976 cut-off events. For 536/536 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 132314 event pairs, 14450 based on Foata normal form. 0/8181 useless extension candidates. Maximal degree in co-relation 21460. Up to 11491 conditions per place. [2023-08-29 23:55:34,125 INFO L137 encePairwiseOnDemand]: 562/574 looper letters, 116 selfloop transitions, 6 changer transitions 0/122 dead transitions. [2023-08-29 23:55:34,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 122 transitions, 524 flow [2023-08-29 23:55:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 797 transitions. [2023-08-29 23:55:34,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628339140534262 [2023-08-29 23:55:34,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 797 transitions. [2023-08-29 23:55:34,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 797 transitions. [2023-08-29 23:55:34,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:34,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 797 transitions. [2023-08-29 23:55:34,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:34,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:34,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:34,172 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 150 flow. Second operand 3 states and 797 transitions. [2023-08-29 23:55:34,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 122 transitions, 524 flow [2023-08-29 23:55:34,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 122 transitions, 500 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:55:34,190 INFO L231 Difference]: Finished difference. Result has 65 places, 68 transitions, 182 flow [2023-08-29 23:55:34,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=65, PETRI_TRANSITIONS=68} [2023-08-29 23:55:34,200 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2023-08-29 23:55:34,201 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 68 transitions, 182 flow [2023-08-29 23:55:34,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:34,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:34,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:55:34,213 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 23:55:34,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:34,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:34,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:34,411 INFO L85 PathProgramCache]: Analyzing trace with hash 41323, now seen corresponding path program 1 times [2023-08-29 23:55:34,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:34,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979499158] [2023-08-29 23:55:34,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:34,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:34,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:34,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:34,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:55:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:55:34,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:34,558 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:55:34,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:55:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:34,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:34,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:34,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979499158] [2023-08-29 23:55:34,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979499158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:34,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:34,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:55:34,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751940814] [2023-08-29 23:55:34,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:34,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:55:34,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:34,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:55:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:55:34,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 574 [2023-08-29 23:55:34,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:34,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:34,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 574 [2023-08-29 23:55:34,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:37,264 INFO L130 PetriNetUnfolder]: 16535/22970 cut-off events. [2023-08-29 23:55:37,264 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-08-29 23:55:37,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46146 conditions, 22970 events. 16535/22970 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 132313 event pairs, 14450 based on Foata normal form. 4/8191 useless extension candidates. Maximal degree in co-relation 23053. Up to 22970 conditions per place. [2023-08-29 23:55:37,356 INFO L137 encePairwiseOnDemand]: 570/574 looper letters, 64 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-08-29 23:55:37,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 306 flow [2023-08-29 23:55:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2023-08-29 23:55:37,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42334494773519166 [2023-08-29 23:55:37,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2023-08-29 23:55:37,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2023-08-29 23:55:37,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:37,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2023-08-29 23:55:37,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:37,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:37,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:37,366 INFO L175 Difference]: Start difference. First operand has 65 places, 68 transitions, 182 flow. Second operand 3 states and 729 transitions. [2023-08-29 23:55:37,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 306 flow [2023-08-29 23:55:37,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:55:37,368 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 166 flow [2023-08-29 23:55:37,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-08-29 23:55:37,369 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2023-08-29 23:55:37,370 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 166 flow [2023-08-29 23:55:37,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:37,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:37,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:55:37,381 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 23:55:37,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:37,580 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:37,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:37,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1285445, now seen corresponding path program 1 times [2023-08-29 23:55:37,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:37,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064747060] [2023-08-29 23:55:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:37,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:37,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:37,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:37,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:55:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:37,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:55:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:37,770 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:55:37,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:55:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:37,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:55:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:38,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:38,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064747060] [2023-08-29 23:55:38,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064747060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:55:38,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:55:38,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:55:38,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948770271] [2023-08-29 23:55:38,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:55:38,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:55:38,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:38,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:55:38,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:55:39,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 574 [2023-08-29 23:55:39,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:39,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:39,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 574 [2023-08-29 23:55:39,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:43,360 INFO L130 PetriNetUnfolder]: 24812/34469 cut-off events. [2023-08-29 23:55:43,361 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-08-29 23:55:43,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69245 conditions, 34469 events. 24812/34469 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 1872. Compared 206008 event pairs, 21675 based on Foata normal form. 0/12282 useless extension candidates. Maximal degree in co-relation 69237. Up to 11489 conditions per place. [2023-08-29 23:55:43,519 INFO L137 encePairwiseOnDemand]: 562/574 looper letters, 161 selfloop transitions, 27 changer transitions 0/188 dead transitions. [2023-08-29 23:55:43,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 188 transitions, 830 flow [2023-08-29 23:55:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:55:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:55:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1439 transitions. [2023-08-29 23:55:43,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178281068524971 [2023-08-29 23:55:43,531 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1439 transitions. [2023-08-29 23:55:43,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1439 transitions. [2023-08-29 23:55:43,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:43,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1439 transitions. [2023-08-29 23:55:43,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 239.83333333333334) internal successors, (1439), 6 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:43,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 574.0) internal successors, (4018), 7 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:43,552 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 574.0) internal successors, (4018), 7 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:43,553 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 166 flow. Second operand 6 states and 1439 transitions. [2023-08-29 23:55:43,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 188 transitions, 830 flow [2023-08-29 23:55:43,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 188 transitions, 829 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:43,558 INFO L231 Difference]: Finished difference. Result has 70 places, 86 transitions, 369 flow [2023-08-29 23:55:43,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=369, PETRI_PLACES=70, PETRI_TRANSITIONS=86} [2023-08-29 23:55:43,559 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-29 23:55:43,560 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 86 transitions, 369 flow [2023-08-29 23:55:43,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:43,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:43,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:55:43,571 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 (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:43,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:43,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:43,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash 39887349, now seen corresponding path program 1 times [2023-08-29 23:55:43,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:43,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337900975] [2023-08-29 23:55:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:43,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:43,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:43,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:43,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:55:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:43,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:55:43,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:43,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:43,977 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-29 23:55:43,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-29 23:55:44,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:44,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:55:44,126 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:55:44,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:55:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:44,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:44,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:44,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337900975] [2023-08-29 23:55:44,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337900975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:44,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:44,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:55:44,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093518978] [2023-08-29 23:55:44,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:44,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:55:44,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:44,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:55:44,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:55:44,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-08-29 23:55:44,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 86 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:44,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:44,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-08-29 23:55:44,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:46,805 INFO L130 PetriNetUnfolder]: 19050/26784 cut-off events. [2023-08-29 23:55:46,805 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2023-08-29 23:55:46,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53949 conditions, 26784 events. 19050/26784 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 1661. Compared 159809 event pairs, 16587 based on Foata normal form. 0/10277 useless extension candidates. Maximal degree in co-relation 53936. Up to 26784 conditions per place. [2023-08-29 23:55:46,911 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-29 23:55:46,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 513 flow [2023-08-29 23:55:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2023-08-29 23:55:46,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337979094076655 [2023-08-29 23:55:46,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2023-08-29 23:55:46,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2023-08-29 23:55:46,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:46,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2023-08-29 23:55:46,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:46,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:46,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:46,922 INFO L175 Difference]: Start difference. First operand has 70 places, 86 transitions, 369 flow. Second operand 3 states and 747 transitions. [2023-08-29 23:55:46,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 513 flow [2023-08-29 23:55:46,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 483 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:46,925 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 321 flow [2023-08-29 23:55:46,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2023-08-29 23:55:46,926 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-08-29 23:55:46,926 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 321 flow [2023-08-29 23:55:46,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:46,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:46,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:55:46,936 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 23:55:47,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:47,136 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:47,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:47,137 INFO L85 PathProgramCache]: Analyzing trace with hash 39887350, now seen corresponding path program 1 times [2023-08-29 23:55:47,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:47,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449413706] [2023-08-29 23:55:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:47,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:47,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:47,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:47,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:55:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:47,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:55:47,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:47,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:47,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:47,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:47,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:47,362 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 23:55:47,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-29 23:55:47,386 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:55:47,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-29 23:55:47,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:47,434 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 12 treesize of output 14 [2023-08-29 23:55:47,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:47,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:55:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:47,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:47,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:47,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449413706] [2023-08-29 23:55:47,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449413706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:47,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:47,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:55:47,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680481814] [2023-08-29 23:55:47,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:47,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:55:47,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:47,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:55:47,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:55:47,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-08-29 23:55:47,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:47,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:47,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-08-29 23:55:47,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:49,389 INFO L130 PetriNetUnfolder]: 13288/19099 cut-off events. [2023-08-29 23:55:49,389 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-29 23:55:49,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38553 conditions, 19099 events. 13288/19099 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 113000 event pairs, 11499 based on Foata normal form. 0/8261 useless extension candidates. Maximal degree in co-relation 38539. Up to 19099 conditions per place. [2023-08-29 23:55:49,468 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 77 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-08-29 23:55:49,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 457 flow [2023-08-29 23:55:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-08-29 23:55:49,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326364692218351 [2023-08-29 23:55:49,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-08-29 23:55:49,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-08-29 23:55:49,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:49,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-08-29 23:55:49,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:49,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:49,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:49,478 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 321 flow. Second operand 3 states and 745 transitions. [2023-08-29 23:55:49,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 457 flow [2023-08-29 23:55:49,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 456 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:49,496 INFO L231 Difference]: Finished difference. Result has 68 places, 78 transitions, 302 flow [2023-08-29 23:55:49,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=68, PETRI_TRANSITIONS=78} [2023-08-29 23:55:49,499 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-29 23:55:49,499 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 78 transitions, 302 flow [2023-08-29 23:55:49,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:49,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:49,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:55:49,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:49,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:49,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:49,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:49,714 INFO L85 PathProgramCache]: Analyzing trace with hash -322930208, now seen corresponding path program 1 times [2023-08-29 23:55:49,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:49,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470873695] [2023-08-29 23:55:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:49,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:49,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:49,715 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:49,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:55:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:55:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:49,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:49,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:49,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:49,904 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 23:55:49,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-29 23:55:49,926 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 23:55:49,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:49,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:55:50,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:50,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:55:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:50,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:50,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:50,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470873695] [2023-08-29 23:55:50,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470873695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:50,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:50,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:55:50,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651653223] [2023-08-29 23:55:50,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:50,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:55:50,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:55:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:55:50,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-08-29 23:55:50,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 78 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:50,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:50,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-08-29 23:55:50,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:51,782 INFO L130 PetriNetUnfolder]: 12874/18463 cut-off events. [2023-08-29 23:55:51,782 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-29 23:55:51,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37282 conditions, 18463 events. 12874/18463 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 108521 event pairs, 11136 based on Foata normal form. 0/8108 useless extension candidates. Maximal degree in co-relation 37267. Up to 18463 conditions per place. [2023-08-29 23:55:51,861 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 75 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-29 23:55:51,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 450 flow [2023-08-29 23:55:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:51,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-08-29 23:55:51,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43147502903600465 [2023-08-29 23:55:51,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-08-29 23:55:51,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-08-29 23:55:51,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:51,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-08-29 23:55:51,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:51,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:51,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:51,869 INFO L175 Difference]: Start difference. First operand has 68 places, 78 transitions, 302 flow. Second operand 3 states and 743 transitions. [2023-08-29 23:55:51,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 450 flow [2023-08-29 23:55:51,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 449 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:51,872 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 299 flow [2023-08-29 23:55:51,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2023-08-29 23:55:51,872 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2023-08-29 23:55:51,873 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 299 flow [2023-08-29 23:55:51,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:51,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:51,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:55:51,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:52,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:52,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:52,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:52,083 INFO L85 PathProgramCache]: Analyzing trace with hash -322930209, now seen corresponding path program 1 times [2023-08-29 23:55:52,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:52,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909809436] [2023-08-29 23:55:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:55:52,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:52,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:52,085 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:52,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:55:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:55:52,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:55:52,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:52,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:52,270 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-29 23:55:52,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-29 23:55:52,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:55:52,486 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-29 23:55:52,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-08-29 23:55:52,638 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-29 23:55:52,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-29 23:55:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:52,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:55:52,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:52,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909809436] [2023-08-29 23:55:52,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909809436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:55:52,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:55:52,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:55:52,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44751846] [2023-08-29 23:55:52,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:55:52,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:55:52,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:52,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:55:52,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:55:53,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 574 [2023-08-29 23:55:53,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 299 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:53,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:53,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 574 [2023-08-29 23:55:53,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:55:54,577 INFO L130 PetriNetUnfolder]: 12460/17827 cut-off events. [2023-08-29 23:55:54,577 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-29 23:55:54,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36011 conditions, 17827 events. 12460/17827 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 1065. Compared 103923 event pairs, 10773 based on Foata normal form. 0/7955 useless extension candidates. Maximal degree in co-relation 35995. Up to 17827 conditions per place. [2023-08-29 23:55:54,641 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 73 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-29 23:55:54,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 443 flow [2023-08-29 23:55:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:55:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:55:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 741 transitions. [2023-08-29 23:55:54,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43031358885017423 [2023-08-29 23:55:54,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 741 transitions. [2023-08-29 23:55:54,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 741 transitions. [2023-08-29 23:55:54,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:55:54,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 741 transitions. [2023-08-29 23:55:54,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:54,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:54,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:54,648 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 299 flow. Second operand 3 states and 741 transitions. [2023-08-29 23:55:54,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 443 flow [2023-08-29 23:55:54,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:55:54,650 INFO L231 Difference]: Finished difference. Result has 66 places, 74 transitions, 296 flow [2023-08-29 23:55:54,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=66, PETRI_TRANSITIONS=74} [2023-08-29 23:55:54,651 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-08-29 23:55:54,651 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 74 transitions, 296 flow [2023-08-29 23:55:54,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:54,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:55:54,652 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:55:54,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:55:54,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:54,862 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:55:54,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:55:54,863 INFO L85 PathProgramCache]: Analyzing trace with hash -355581910, now seen corresponding path program 2 times [2023-08-29 23:55:54,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:55:54,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546069641] [2023-08-29 23:55:54,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:55:54,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:55:54,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:55:54,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:55:54,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:55:54,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:55:54,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:55:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:55:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:55:55,038 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:55:55,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:55:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:55,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:55:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:55:55,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:55:55,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546069641] [2023-08-29 23:55:55,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546069641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:55:55,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:55:55,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:55:55,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117542341] [2023-08-29 23:55:55,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:55:55,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:55:55,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:55:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:55:55,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:55:59,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 574 [2023-08-29 23:55:59,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 74 transitions, 296 flow. Second operand has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:55:59,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:55:59,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 574 [2023-08-29 23:55:59,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:02,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:04,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:05,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:08,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:09,430 WARN L539 Checker$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 23:56:10,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:12,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:14,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:16,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:17,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:19,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:56:21,807 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 23:56:30,071 INFO L130 PetriNetUnfolder]: 41514/59380 cut-off events. [2023-08-29 23:56:30,071 INFO L131 PetriNetUnfolder]: For 636/636 co-relation queries the response was YES. [2023-08-29 23:56:30,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119827 conditions, 59380 events. 41514/59380 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 385403 event pairs, 35910 based on Foata normal form. 18/26484 useless extension candidates. Maximal degree in co-relation 119810. Up to 6400 conditions per place. [2023-08-29 23:56:30,314 INFO L137 encePairwiseOnDemand]: 564/574 looper letters, 438 selfloop transitions, 52 changer transitions 0/490 dead transitions. [2023-08-29 23:56:30,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 490 transitions, 2314 flow [2023-08-29 23:56:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:56:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:56:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3028 transitions. [2023-08-29 23:56:30,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43960511033681765 [2023-08-29 23:56:30,322 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3028 transitions. [2023-08-29 23:56:30,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3028 transitions. [2023-08-29 23:56:30,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:30,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3028 transitions. [2023-08-29 23:56:30,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 252.33333333333334) internal successors, (3028), 12 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:30,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 574.0) internal successors, (7462), 13 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:30,338 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 574.0) internal successors, (7462), 13 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:30,338 INFO L175 Difference]: Start difference. First operand has 66 places, 74 transitions, 296 flow. Second operand 12 states and 3028 transitions. [2023-08-29 23:56:30,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 490 transitions, 2314 flow [2023-08-29 23:56:30,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 490 transitions, 2313 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:56:30,345 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 685 flow [2023-08-29 23:56:30,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=685, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2023-08-29 23:56:30,346 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 15 predicate places. [2023-08-29 23:56:30,346 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 685 flow [2023-08-29 23:56:30,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:30,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:30,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:30,356 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 23:56:30,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:30,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:56:30,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1420903504, now seen corresponding path program 1 times [2023-08-29 23:56:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:30,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553202074] [2023-08-29 23:56:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:30,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:30,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:30,559 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:56:30,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:56:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:30,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:56:30,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:30,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:56:30,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:30,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553202074] [2023-08-29 23:56:30,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553202074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:56:30,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:56:30,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:56:30,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491614715] [2023-08-29 23:56:30,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:56:30,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:56:30,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:30,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:56:30,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:56:30,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 574 [2023-08-29 23:56:30,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 685 flow. Second operand has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:30,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:30,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 574 [2023-08-29 23:56:30,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:36,746 INFO L130 PetriNetUnfolder]: 42676/61416 cut-off events. [2023-08-29 23:56:36,746 INFO L131 PetriNetUnfolder]: For 741/741 co-relation queries the response was YES. [2023-08-29 23:56:36,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124254 conditions, 61416 events. 42676/61416 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 1816. Compared 404479 event pairs, 36980 based on Foata normal form. 820/28853 useless extension candidates. Maximal degree in co-relation 124229. Up to 59379 conditions per place. [2023-08-29 23:56:37,026 INFO L137 encePairwiseOnDemand]: 560/574 looper letters, 158 selfloop transitions, 3 changer transitions 1/162 dead transitions. [2023-08-29 23:56:37,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 162 transitions, 1415 flow [2023-08-29 23:56:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:56:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:56:37,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 981 transitions. [2023-08-29 23:56:37,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42726480836236935 [2023-08-29 23:56:37,029 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 981 transitions. [2023-08-29 23:56:37,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 981 transitions. [2023-08-29 23:56:37,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:37,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 981 transitions. [2023-08-29 23:56:37,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.25) internal successors, (981), 4 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:37,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:37,035 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:37,035 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 685 flow. Second operand 4 states and 981 transitions. [2023-08-29 23:56:37,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 162 transitions, 1415 flow [2023-08-29 23:56:37,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 162 transitions, 1264 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-08-29 23:56:37,041 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 621 flow [2023-08-29 23:56:37,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=621, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2023-08-29 23:56:37,042 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 15 predicate places. [2023-08-29 23:56:37,042 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 621 flow [2023-08-29 23:56:37,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:37,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:37,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:37,053 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 (10)] Ended with exit code 0 [2023-08-29 23:56:37,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:37,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:56:37,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:37,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1098255226, now seen corresponding path program 1 times [2023-08-29 23:56:37,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:37,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218892570] [2023-08-29 23:56:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:37,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:37,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:37,253 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:56:37,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:56:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:37,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:56:37,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:37,405 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-29 23:56:37,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-29 23:56:37,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:56:37,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:56:37,472 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:56:37,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:56:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:37,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:56:37,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218892570] [2023-08-29 23:56:37,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218892570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:56:37,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:56:37,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:56:37,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363485766] [2023-08-29 23:56:37,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:56:37,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:56:37,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:37,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:56:37,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:56:37,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 574 [2023-08-29 23:56:37,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 621 flow. Second operand has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:37,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:56:37,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 574 [2023-08-29 23:56:37,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:56:43,155 INFO L130 PetriNetUnfolder]: 40956/58776 cut-off events. [2023-08-29 23:56:43,155 INFO L131 PetriNetUnfolder]: For 3913/3913 co-relation queries the response was YES. [2023-08-29 23:56:43,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138422 conditions, 58776 events. 40956/58776 cut-off events. For 3913/3913 co-relation queries the response was YES. Maximal size of possible extension queue 1864. Compared 384382 event pairs, 35450 based on Foata normal form. 0/27426 useless extension candidates. Maximal degree in co-relation 138395. Up to 58776 conditions per place. [2023-08-29 23:56:43,629 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 102 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-08-29 23:56:43,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 103 transitions, 823 flow [2023-08-29 23:56:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:56:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:56:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 727 transitions. [2023-08-29 23:56:43,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4221835075493612 [2023-08-29 23:56:43,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 727 transitions. [2023-08-29 23:56:43,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 727 transitions. [2023-08-29 23:56:43,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:56:43,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 727 transitions. [2023-08-29 23:56:43,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:43,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:43,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:43,637 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 621 flow. Second operand 3 states and 727 transitions. [2023-08-29 23:56:43,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 103 transitions, 823 flow [2023-08-29 23:56:43,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 103 transitions, 817 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 23:56:43,645 INFO L231 Difference]: Finished difference. Result has 82 places, 103 transitions, 613 flow [2023-08-29 23:56:43,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=613, PETRI_PLACES=82, PETRI_TRANSITIONS=103} [2023-08-29 23:56:43,645 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 14 predicate places. [2023-08-29 23:56:43,646 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 103 transitions, 613 flow [2023-08-29 23:56:43,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:56:43,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:56:43,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:56:43,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:56:43,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:43,856 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:56:43,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:56:43,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1399459659, now seen corresponding path program 1 times [2023-08-29 23:56:43,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:56:43,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358046042] [2023-08-29 23:56:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:56:43,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:56:43,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:56:43,859 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:56:43,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:56:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:56:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:56:43,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:56:44,083 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:56:44,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:56:44,169 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:56:44,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:56:44,303 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:56:44,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 23:56:44,309 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 23:56:44,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:56:44,350 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 23:56:44,358 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:56:44,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:56:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:44,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:56:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:56:51,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:56:51,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358046042] [2023-08-29 23:56:51,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358046042] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:56:51,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:56:51,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:56:51,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568564204] [2023-08-29 23:56:51,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:56:51,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:56:51,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:56:51,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:56:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:56:53,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:56:56,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:56:58,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:01,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:03,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:06,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:08,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:10,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:13,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:16,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:18,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:20,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:22,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:24,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:27,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:30,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:57:30,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 574 [2023-08-29 23:57:30,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 613 flow. Second operand has 10 states, 10 states have (on average 183.6) internal successors, (1836), 10 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:57:30,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:57:30,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 574 [2023-08-29 23:57:30,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:57:52,600 WARN L222 SmtUtils]: Spent 21.69s on a formula simplification. DAG size of input: 78 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:57:56,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:58:14,483 WARN L222 SmtUtils]: Spent 10.22s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:58:17,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:58:19,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:58:22,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:58:24,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:58:26,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:58:47,456 WARN L222 SmtUtils]: Spent 9.98s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:59:08,041 INFO L130 PetriNetUnfolder]: 90622/130274 cut-off events. [2023-08-29 23:59:08,042 INFO L131 PetriNetUnfolder]: For 10904/10904 co-relation queries the response was YES. [2023-08-29 23:59:08,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302340 conditions, 130274 events. 90622/130274 cut-off events. For 10904/10904 co-relation queries the response was YES. Maximal size of possible extension queue 3693. Compared 936594 event pairs, 69550 based on Foata normal form. 0/65754 useless extension candidates. Maximal degree in co-relation 302312. Up to 56761 conditions per place. [2023-08-29 23:59:08,719 INFO L137 encePairwiseOnDemand]: 553/574 looper letters, 251 selfloop transitions, 65 changer transitions 0/316 dead transitions. [2023-08-29 23:59:08,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 316 transitions, 2425 flow [2023-08-29 23:59:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-29 23:59:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-29 23:59:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3650 transitions. [2023-08-29 23:59:08,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346781588116633 [2023-08-29 23:59:08,727 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3650 transitions. [2023-08-29 23:59:08,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3650 transitions. [2023-08-29 23:59:08,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:08,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3650 transitions. [2023-08-29 23:59:08,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 192.10526315789474) internal successors, (3650), 19 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:08,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 574.0) internal successors, (11480), 20 states have internal predecessors, (11480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:08,746 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 574.0) internal successors, (11480), 20 states have internal predecessors, (11480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:08,746 INFO L175 Difference]: Start difference. First operand has 82 places, 103 transitions, 613 flow. Second operand 19 states and 3650 transitions. [2023-08-29 23:59:08,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 316 transitions, 2425 flow [2023-08-29 23:59:08,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 316 transitions, 2424 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:08,771 INFO L231 Difference]: Finished difference. Result has 106 places, 153 transitions, 1328 flow [2023-08-29 23:59:08,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1328, PETRI_PLACES=106, PETRI_TRANSITIONS=153} [2023-08-29 23:59:08,772 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 38 predicate places. [2023-08-29 23:59:08,772 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 153 transitions, 1328 flow [2023-08-29 23:59:08,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.6) internal successors, (1836), 10 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:08,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:08,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:08,785 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 23:59:08,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:08,985 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:59:08,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:08,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1098255225, now seen corresponding path program 1 times [2023-08-29 23:59:08,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:08,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745596327] [2023-08-29 23:59:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:08,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:08,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:08,988 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:08,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:59:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:59:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:09,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:09,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:09,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:09,224 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 23:59:09,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-29 23:59:09,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-29 23:59:09,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:09,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:59:09,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:59:09,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:59:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:59:09,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:09,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:09,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745596327] [2023-08-29 23:59:09,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745596327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:09,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:09,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:59:09,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61721238] [2023-08-29 23:59:09,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:09,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:59:09,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:09,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:59:09,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:59:09,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 574 [2023-08-29 23:59:09,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 153 transitions, 1328 flow. Second operand has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:09,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:09,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 574 [2023-08-29 23:59:09,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:24,381 INFO L130 PetriNetUnfolder]: 86802/124384 cut-off events. [2023-08-29 23:59:24,381 INFO L131 PetriNetUnfolder]: For 85859/85859 co-relation queries the response was YES. [2023-08-29 23:59:24,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345567 conditions, 124384 events. 86802/124384 cut-off events. For 85859/85859 co-relation queries the response was YES. Maximal size of possible extension queue 3866. Compared 893963 event pairs, 68570 based on Foata normal form. 0/72284 useless extension candidates. Maximal degree in co-relation 345531. Up to 124384 conditions per place. [2023-08-29 23:59:25,147 INFO L137 encePairwiseOnDemand]: 571/574 looper letters, 150 selfloop transitions, 1 changer transitions 0/151 dead transitions. [2023-08-29 23:59:25,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 151 transitions, 1626 flow [2023-08-29 23:59:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:59:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:59:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2023-08-29 23:59:25,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4245063879210221 [2023-08-29 23:59:25,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2023-08-29 23:59:25,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2023-08-29 23:59:25,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:25,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2023-08-29 23:59:25,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:25,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:25,152 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:25,152 INFO L175 Difference]: Start difference. First operand has 106 places, 153 transitions, 1328 flow. Second operand 3 states and 731 transitions. [2023-08-29 23:59:25,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 151 transitions, 1626 flow [2023-08-29 23:59:25,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 1611 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:25,740 INFO L231 Difference]: Finished difference. Result has 105 places, 151 transitions, 1311 flow [2023-08-29 23:59:25,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1311, PETRI_PLACES=105, PETRI_TRANSITIONS=151} [2023-08-29 23:59:25,741 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 37 predicate places. [2023-08-29 23:59:25,741 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 151 transitions, 1311 flow [2023-08-29 23:59:25,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:25,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:25,742 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:25,750 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 23:59:25,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:25,945 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:59:25,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:25,946 INFO L85 PathProgramCache]: Analyzing trace with hash -734700343, now seen corresponding path program 1 times [2023-08-29 23:59:25,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:25,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775445676] [2023-08-29 23:59:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:25,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:25,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:25,947 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:25,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:59:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:26,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:59:26,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:26,204 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:59:26,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:59:26,272 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 23:59:26,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 23:59:26,310 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:59:26,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:59:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:59:26,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:26,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:26,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775445676] [2023-08-29 23:59:26,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775445676] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:26,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:26,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:59:26,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829205584] [2023-08-29 23:59:26,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:26,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:59:26,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:26,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:59:26,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:59:26,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 574 [2023-08-29 23:59:26,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 151 transitions, 1311 flow. Second operand has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:26,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:26,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 574 [2023-08-29 23:59:26,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:37,842 INFO L130 PetriNetUnfolder]: 67362/96084 cut-off events. [2023-08-29 23:59:37,842 INFO L131 PetriNetUnfolder]: For 64036/64036 co-relation queries the response was YES. [2023-08-29 23:59:38,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255332 conditions, 96084 events. 67362/96084 cut-off events. For 64036/64036 co-relation queries the response was YES. Maximal size of possible extension queue 2895. Compared 661563 event pairs, 52090 based on Foata normal form. 3620/58844 useless extension candidates. Maximal degree in co-relation 255295. Up to 96071 conditions per place. [2023-08-29 23:59:38,453 INFO L137 encePairwiseOnDemand]: 569/574 looper letters, 136 selfloop transitions, 12 changer transitions 0/148 dead transitions. [2023-08-29 23:59:38,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 148 transitions, 1583 flow [2023-08-29 23:59:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:59:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:59:38,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2023-08-29 23:59:38,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2023-08-29 23:59:38,455 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2023-08-29 23:59:38,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2023-08-29 23:59:38,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:38,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2023-08-29 23:59:38,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:38,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:38,460 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:38,460 INFO L175 Difference]: Start difference. First operand has 105 places, 151 transitions, 1311 flow. Second operand 4 states and 928 transitions. [2023-08-29 23:59:38,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 148 transitions, 1583 flow [2023-08-29 23:59:38,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 148 transitions, 1572 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-29 23:59:38,764 INFO L231 Difference]: Finished difference. Result has 104 places, 148 transitions, 1300 flow [2023-08-29 23:59:38,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1300, PETRI_PLACES=104, PETRI_TRANSITIONS=148} [2023-08-29 23:59:38,764 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2023-08-29 23:59:38,765 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 148 transitions, 1300 flow [2023-08-29 23:59:38,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:38,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:38,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:38,772 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 (14)] Forceful destruction successful, exit code 0 [2023-08-29 23:59:38,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:38,966 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:59:38,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash -433575514, now seen corresponding path program 1 times [2023-08-29 23:59:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:38,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373912831] [2023-08-29 23:59:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:38,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:38,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:38,968 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:38,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 23:59:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:39,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:59:39,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:39,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 23:59:39,105 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 23:59:39,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:39,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:39,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373912831] [2023-08-29 23:59:39,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373912831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:39,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:39,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:59:39,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641458323] [2023-08-29 23:59:39,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:39,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:59:39,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:59:39,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:59:39,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 574 [2023-08-29 23:59:39,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 148 transitions, 1300 flow. Second operand has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:39,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:39,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 574 [2023-08-29 23:59:39,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:59:47,936 INFO L130 PetriNetUnfolder]: 52232/74694 cut-off events. [2023-08-29 23:59:47,936 INFO L131 PetriNetUnfolder]: For 36470/36470 co-relation queries the response was YES. [2023-08-29 23:59:48,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200464 conditions, 74694 events. 52232/74694 cut-off events. For 36470/36470 co-relation queries the response was YES. Maximal size of possible extension queue 2204. Compared 497826 event pairs, 39640 based on Foata normal form. 0/45834 useless extension candidates. Maximal degree in co-relation 200426. Up to 74495 conditions per place. [2023-08-29 23:59:48,430 INFO L137 encePairwiseOnDemand]: 570/574 looper letters, 128 selfloop transitions, 18 changer transitions 0/146 dead transitions. [2023-08-29 23:59:48,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 146 transitions, 1588 flow [2023-08-29 23:59:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:59:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:59:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 925 transitions. [2023-08-29 23:59:48,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028745644599303 [2023-08-29 23:59:48,432 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 925 transitions. [2023-08-29 23:59:48,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 925 transitions. [2023-08-29 23:59:48,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:59:48,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 925 transitions. [2023-08-29 23:59:48,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.25) internal successors, (925), 4 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:48,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:48,435 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 574.0) internal successors, (2870), 5 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:48,435 INFO L175 Difference]: Start difference. First operand has 104 places, 148 transitions, 1300 flow. Second operand 4 states and 925 transitions. [2023-08-29 23:59:48,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 146 transitions, 1588 flow [2023-08-29 23:59:48,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 146 transitions, 1575 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:59:48,653 INFO L231 Difference]: Finished difference. Result has 103 places, 146 transitions, 1319 flow [2023-08-29 23:59:48,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1319, PETRI_PLACES=103, PETRI_TRANSITIONS=146} [2023-08-29 23:59:48,654 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 35 predicate places. [2023-08-29 23:59:48,654 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 146 transitions, 1319 flow [2023-08-29 23:59:48,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:48,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:59:48,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:59:48,662 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 23:59:48,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:48,855 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-29 23:59:48,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:59:48,856 INFO L85 PathProgramCache]: Analyzing trace with hash -433575513, now seen corresponding path program 1 times [2023-08-29 23:59:48,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:59:48,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271868932] [2023-08-29 23:59:48,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:59:48,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:59:48,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:59:48,857 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:59:48,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 23:59:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:59:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:59:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:59:48,986 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 23:59:48,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:59:48,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:59:48,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271868932] [2023-08-29 23:59:48,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271868932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:59:48,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:59:48,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:59:48,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109028577] [2023-08-29 23:59:48,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:59:48,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:59:48,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:59:48,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:59:48,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:59:48,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 574 [2023-08-29 23:59:49,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 146 transitions, 1319 flow. Second operand has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:59:49,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:59:49,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 574 [2023-08-29 23:59:49,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:00:01,842 INFO L130 PetriNetUnfolder]: 78942/112584 cut-off events. [2023-08-30 00:00:01,842 INFO L131 PetriNetUnfolder]: For 63273/63273 co-relation queries the response was YES. [2023-08-30 00:00:02,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303399 conditions, 112584 events. 78942/112584 cut-off events. For 63273/63273 co-relation queries the response was YES. Maximal size of possible extension queue 3260. Compared 791770 event pairs, 30370 based on Foata normal form. 2720/69724 useless extension candidates. Maximal degree in co-relation 303361. Up to 61801 conditions per place. [2023-08-30 00:00:02,670 INFO L137 encePairwiseOnDemand]: 569/574 looper letters, 171 selfloop transitions, 3 changer transitions 0/174 dead transitions. [2023-08-30 00:00:02,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 174 transitions, 1789 flow [2023-08-30 00:00:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:00:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:00:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 767 transitions. [2023-08-30 00:00:02,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4454123112659698 [2023-08-30 00:00:02,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 767 transitions. [2023-08-30 00:00:02,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 767 transitions. [2023-08-30 00:00:02,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:00:02,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 767 transitions. [2023-08-30 00:00:02,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:02,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:02,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:02,675 INFO L175 Difference]: Start difference. First operand has 103 places, 146 transitions, 1319 flow. Second operand 3 states and 767 transitions. [2023-08-30 00:00:02,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 174 transitions, 1789 flow [2023-08-30 00:00:03,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 174 transitions, 1770 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:00:03,180 INFO L231 Difference]: Finished difference. Result has 104 places, 148 transitions, 1321 flow [2023-08-30 00:00:03,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1321, PETRI_PLACES=104, PETRI_TRANSITIONS=148} [2023-08-30 00:00:03,180 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2023-08-30 00:00:03,180 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 148 transitions, 1321 flow [2023-08-30 00:00:03,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:03,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:00:03,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:00:03,271 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 [2023-08-30 00:00:03,381 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 [2023-08-30 00:00:03,382 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 00:00:03,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:00:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash -553477236, now seen corresponding path program 1 times [2023-08-30 00:00:03,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:00:03,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083455964] [2023-08-30 00:00:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:00:03,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:00:03,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:00:03,383 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) [2023-08-30 00:00:03,385 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 [2023-08-30 00:00:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:00:03,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:00:03,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:00:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:00:03,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:00:03,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:00:03,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083455964] [2023-08-30 00:00:03,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083455964] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:00:03,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:00:03,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:00:03,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18111296] [2023-08-30 00:00:03,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:00:03,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:00:03,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:00:03,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:00:03,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:00:03,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 574 [2023-08-30 00:00:03,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 148 transitions, 1321 flow. Second operand has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:03,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:00:03,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 574 [2023-08-30 00:00:03,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:00:14,125 INFO L130 PetriNetUnfolder]: 60342/88584 cut-off events. [2023-08-30 00:00:14,125 INFO L131 PetriNetUnfolder]: For 51046/51046 co-relation queries the response was YES. [2023-08-30 00:00:14,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248960 conditions, 88584 events. 60342/88584 cut-off events. For 51046/51046 co-relation queries the response was YES. Maximal size of possible extension queue 2677. Compared 638662 event pairs, 16790 based on Foata normal form. 3640/56804 useless extension candidates. Maximal degree in co-relation 248921. Up to 71541 conditions per place. [2023-08-30 00:00:14,801 INFO L137 encePairwiseOnDemand]: 567/574 looper letters, 159 selfloop transitions, 5 changer transitions 0/164 dead transitions. [2023-08-30 00:00:14,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 164 transitions, 1705 flow [2023-08-30 00:00:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:00:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:00:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 763 transitions. [2023-08-30 00:00:14,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44308943089430897 [2023-08-30 00:00:14,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 763 transitions. [2023-08-30 00:00:14,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 763 transitions. [2023-08-30 00:00:14,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:00:14,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 763 transitions. [2023-08-30 00:00:14,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:14,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:14,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:14,807 INFO L175 Difference]: Start difference. First operand has 104 places, 148 transitions, 1321 flow. Second operand 3 states and 763 transitions. [2023-08-30 00:00:14,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 164 transitions, 1705 flow [2023-08-30 00:00:15,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 164 transitions, 1700 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:00:15,038 INFO L231 Difference]: Finished difference. Result has 106 places, 147 transitions, 1339 flow [2023-08-30 00:00:15,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1339, PETRI_PLACES=106, PETRI_TRANSITIONS=147} [2023-08-30 00:00:15,038 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 38 predicate places. [2023-08-30 00:00:15,039 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 147 transitions, 1339 flow [2023-08-30 00:00:15,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:15,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:00:15,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:00:15,047 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 [2023-08-30 00:00:15,240 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 [2023-08-30 00:00:15,240 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 00:00:15,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:00:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash 940356316, now seen corresponding path program 1 times [2023-08-30 00:00:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:00:15,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668209059] [2023-08-30 00:00:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:00:15,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:00:15,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:00:15,242 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) [2023-08-30 00:00:15,244 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 [2023-08-30 00:00:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:00:15,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:00:15,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:00:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:00:15,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:00:15,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:00:15,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668209059] [2023-08-30 00:00:15,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668209059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:00:15,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:00:15,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:00:15,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982533731] [2023-08-30 00:00:15,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:00:15,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:00:15,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:00:15,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:00:15,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:00:15,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 574 [2023-08-30 00:00:15,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 147 transitions, 1339 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:15,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:00:15,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 574 [2023-08-30 00:00:15,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:00:24,161 INFO L130 PetriNetUnfolder]: 44922/67684 cut-off events. [2023-08-30 00:00:24,162 INFO L131 PetriNetUnfolder]: For 54826/54826 co-relation queries the response was YES. [2023-08-30 00:00:24,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210542 conditions, 67684 events. 44922/67684 cut-off events. For 54826/54826 co-relation queries the response was YES. Maximal size of possible extension queue 2101. Compared 488322 event pairs, 18470 based on Foata normal form. 1440/41024 useless extension candidates. Maximal degree in co-relation 210501. Up to 57801 conditions per place. [2023-08-30 00:00:24,676 INFO L137 encePairwiseOnDemand]: 567/574 looper letters, 158 selfloop transitions, 3 changer transitions 0/161 dead transitions. [2023-08-30 00:00:24,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 161 transitions, 1735 flow [2023-08-30 00:00:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:00:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:00:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2023-08-30 00:00:24,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2023-08-30 00:00:24,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2023-08-30 00:00:24,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2023-08-30 00:00:24,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:00:24,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2023-08-30 00:00:24,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:24,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:24,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:24,682 INFO L175 Difference]: Start difference. First operand has 106 places, 147 transitions, 1339 flow. Second operand 3 states and 762 transitions. [2023-08-30 00:00:24,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 161 transitions, 1735 flow [2023-08-30 00:00:24,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 161 transitions, 1730 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:00:24,814 INFO L231 Difference]: Finished difference. Result has 108 places, 149 transitions, 1359 flow [2023-08-30 00:00:24,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1359, PETRI_PLACES=108, PETRI_TRANSITIONS=149} [2023-08-30 00:00:24,815 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 40 predicate places. [2023-08-30 00:00:24,815 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 149 transitions, 1359 flow [2023-08-30 00:00:24,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:00:24,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:00:24,816 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:00:24,826 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 [2023-08-30 00:00:25,025 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 [2023-08-30 00:00:25,026 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-30 00:00:25,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:00:25,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1576424810, now seen corresponding path program 1 times [2023-08-30 00:00:25,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:00:25,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8249451] [2023-08-30 00:00:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:00:25,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:00:25,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:00:25,028 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) [2023-08-30 00:00:25,029 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 [2023-08-30 00:00:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:00:25,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 00:00:25,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:00:25,424 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:00:25,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:00:25,583 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:00:25,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:00:25,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:00:25,946 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 19 treesize of output 19 [2023-08-30 00:00:26,006 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 00:00:26,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 00:00:26,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:00:26,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 00:00:26,157 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:00:26,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:00:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:00:26,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:00:41,189 WARN L222 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:00:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:00:49,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:00:49,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8249451] [2023-08-30 00:00:49,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8249451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:00:49,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:00:49,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 00:00:49,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882381553] [2023-08-30 00:00:49,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:00:49,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:00:49,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:00:49,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:00:49,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:00:55,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:01:02,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:01:15,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:01:18,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:01:22,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:01:25,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:01:27,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:01:37,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:01:51,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:02:03,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:02:05,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:02:10,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:02:16,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:02:29,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:02:36,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 574 [2023-08-30 00:02:36,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 149 transitions, 1359 flow. Second operand has 16 states, 16 states have (on average 184.375) internal successors, (2950), 16 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:02:36,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:02:36,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 574 [2023-08-30 00:02:36,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:02:54,289 WARN L222 SmtUtils]: Spent 17.35s on a formula simplification. DAG size of input: 105 DAG size of output: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:02:56,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:02:58,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:03:00,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:03:02,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:03:05,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:03:36,091 WARN L222 SmtUtils]: Spent 28.98s on a formula simplification. DAG size of input: 103 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:04:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:04:06,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 139 [2023-08-30 00:04:06,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 00:04:06,402 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 [2023-08-30 00:04:06,403 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:625) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:187) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:160) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:483) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:279) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:261) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:195) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:135) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfoldingHelper(PetriNetUnfolder.java:209) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfolding(PetriNetUnfolder.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:129) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:64) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:125) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:481) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 60 more [2023-08-30 00:04:06,410 INFO L158 Benchmark]: Toolchain (without parser) took 546392.33ms. Allocated memory was 60.8MB in the beginning and 15.9GB in the end (delta: 15.8GB). Free memory was 28.4MB in the beginning and 9.2GB in the end (delta: -9.2GB). Peak memory consumption was 6.7GB. Max. memory is 16.1GB. [2023-08-30 00:04:06,410 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 50.3MB. Free memory was 28.8MB in the beginning and 28.7MB in the end (delta: 27.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:04:06,411 INFO L158 Benchmark]: CACSL2BoogieTranslator took 312.63ms. Allocated memory is still 60.8MB. Free memory was 28.1MB in the beginning and 28.4MB in the end (delta: -301.4kB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. [2023-08-30 00:04:06,411 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.36ms. Allocated memory is still 60.8MB. Free memory was 28.2MB in the beginning and 25.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 00:04:06,411 INFO L158 Benchmark]: Boogie Preprocessor took 63.96ms. Allocated memory is still 60.8MB. Free memory was 25.6MB in the beginning and 39.4MB in the end (delta: -13.8MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. [2023-08-30 00:04:06,411 INFO L158 Benchmark]: RCFGBuilder took 1165.18ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 39.3MB in the beginning and 29.5MB in the end (delta: 9.7MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. [2023-08-30 00:04:06,411 INFO L158 Benchmark]: TraceAbstraction took 544766.48ms. Allocated memory was 73.4MB in the beginning and 15.9GB in the end (delta: 15.8GB). Free memory was 49.0MB in the beginning and 9.2GB in the end (delta: -9.2GB). Peak memory consumption was 6.7GB. Max. memory is 16.1GB. [2023-08-30 00:04:06,413 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 50.3MB. Free memory was 28.8MB in the beginning and 28.7MB in the end (delta: 27.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 312.63ms. Allocated memory is still 60.8MB. Free memory was 28.1MB in the beginning and 28.4MB in the end (delta: -301.4kB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 72.36ms. Allocated memory is still 60.8MB. Free memory was 28.2MB in the beginning and 25.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.96ms. Allocated memory is still 60.8MB. Free memory was 25.6MB in the beginning and 39.4MB in the end (delta: -13.8MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. * RCFGBuilder took 1165.18ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 39.3MB in the beginning and 29.5MB in the end (delta: 9.7MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. * TraceAbstraction took 544766.48ms. Allocated memory was 73.4MB in the beginning and 15.9GB in the end (delta: 15.8GB). Free memory was 49.0MB in the beginning and 9.2GB in the end (delta: -9.2GB). Peak memory consumption was 6.7GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 28.1s, 262 PlacesBefore, 68 PlacesAfterwards, 274 TransitionsBefore, 66 TransitionsAfterwards, 3794 CoEnabledTransitionPairs, 8 FixpointIterations, 177 TrivialSequentialCompositions, 56 ConcurrentSequentialCompositions, 36 TrivialYvCompositions, 10 ConcurrentYvCompositions, 14 ChoiceCompositions, 293 TotalNumberOfCompositions, 7895 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4588, independent: 4445, independent conditional: 0, independent unconditional: 4445, dependent: 143, dependent conditional: 0, dependent unconditional: 143, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1900, independent: 1874, independent conditional: 0, independent unconditional: 1874, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4588, independent: 2571, independent conditional: 0, independent unconditional: 2571, dependent: 117, dependent conditional: 0, dependent unconditional: 117, unknown: 1900, unknown conditional: 0, unknown unconditional: 1900] , Statistics on independence cache: Total cache size (in pairs): 213, Positive cache size: 201, Positive conditional cache size: 0, Positive unconditional cache size: 201, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.