./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum.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-more-array-sum.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 c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:19:09,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:19:09,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:19:09,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:19:09,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:19:09,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:19:09,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:19:09,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:19:09,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:19:09,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:19:09,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:19:09,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:19:09,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:19:09,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:19:09,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:19:09,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:19:09,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:19:09,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:19:09,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:19:09,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:19:09,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:19:09,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:19:09,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:19:09,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:19:09,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:19:09,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:19:09,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:19:09,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:19:09,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:19:09,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:19:09,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:19:09,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:19:09,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:19:09,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:19:09,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:19:09,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:19:09,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:19:09,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:19:09,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:19:09,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:19:09,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:19:09,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:19:09,422 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:19:09,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:19:09,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:19:09,424 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:19:09,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:19:09,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:19:09,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:19:09,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:19:09,426 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:19:09,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:19:09,428 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:19:09,428 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:19:09,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:19:09,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:19:09,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:19:09,429 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:19:09,429 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:19:09,429 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:19:09,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:19:09,430 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:19:09,430 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:19:09,430 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:19:09,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:19:09,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:19:09,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:19:09,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:19:09,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:19:09,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:19:09,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:19:09,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:19:09,432 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:19:09,433 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:19:09,433 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:19:09,433 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:19:09,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:19:09,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:19:09,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:19:09,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:19:09,801 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:19:09,801 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:19:09,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c [2023-08-30 00:19:10,969 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:19:11,205 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:19:11,206 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c [2023-08-30 00:19:11,220 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21655eddc/3bf67074533349eb9a7f345c43c8b10c/FLAGc6554bec2 [2023-08-30 00:19:11,238 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21655eddc/3bf67074533349eb9a7f345c43c8b10c [2023-08-30 00:19:11,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:19:11,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:19:11,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:19:11,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:19:11,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:19:11,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:19:11" (1/1) ... [2023-08-30 00:19:11,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1915336a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:11, skipping insertion in model container [2023-08-30 00:19:11,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:19:11" (1/1) ... [2023-08-30 00:19:11,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:19:11,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:19:11,445 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-more-array-sum.wvr.c[2835,2848] [2023-08-30 00:19:11,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:19:11,471 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:19:11,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7fe357b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:11, skipping insertion in model container [2023-08-30 00:19:11,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:19:11,472 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:19:11,474 INFO L158 Benchmark]: Toolchain (without parser) took 231.77ms. Allocated memory is still 62.9MB. Free memory was 40.3MB in the beginning and 30.5MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:19:11,474 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 52.4MB. Free memory is still 29.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:19:11,475 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.24ms. Allocated memory is still 62.9MB. Free memory was 40.2MB in the beginning and 30.5MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 00:19:11,476 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 52.4MB. Free memory is still 29.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.24ms. Allocated memory is still 62.9MB. Free memory was 40.2MB in the beginning and 30.5MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 115]: 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-more-array-sum.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 c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:19:13,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:19:13,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:19:13,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:19:13,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:19:13,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:19:13,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:19:13,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:19:13,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:19:13,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:19:13,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:19:13,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:19:13,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:19:13,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:19:13,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:19:13,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:19:13,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:19:13,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:19:13,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:19:13,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:19:13,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:19:13,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:19:13,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:19:13,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:19:13,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:19:13,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:19:13,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:19:13,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:19:13,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:19:13,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:19:13,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:19:13,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:19:13,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:19:13,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:19:13,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:19:13,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:19:13,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:19:13,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:19:13,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:19:13,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:19:13,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:19:13,287 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:19:13,325 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:19:13,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:19:13,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:19:13,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:19:13,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:19:13,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:19:13,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:19:13,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:19:13,329 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:19:13,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:19:13,330 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:19:13,330 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:19:13,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:19:13,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:19:13,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:19:13,331 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:19:13,331 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:19:13,331 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:19:13,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:19:13,332 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:19:13,332 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:19:13,332 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:19:13,332 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:19:13,332 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:19:13,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:19:13,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:19:13,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:19:13,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:19:13,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:19:13,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:19:13,334 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:19:13,334 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:19:13,334 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:19:13,335 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:19:13,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:19:13,335 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:19:13,335 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:19:13,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:19:13,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:19:13,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:19:13,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:19:13,701 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:19:13,702 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:19:13,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c [2023-08-30 00:19:14,993 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:19:15,174 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:19:15,174 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c [2023-08-30 00:19:15,182 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c907d838/b90ef043c2054f838f8ac255fe0b3c3a/FLAG80e50785a [2023-08-30 00:19:15,195 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c907d838/b90ef043c2054f838f8ac255fe0b3c3a [2023-08-30 00:19:15,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:19:15,199 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:19:15,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:19:15,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:19:15,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:19:15,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eb9c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15, skipping insertion in model container [2023-08-30 00:19:15,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:19:15,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:19:15,368 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-more-array-sum.wvr.c[2835,2848] [2023-08-30 00:19:15,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:19:15,414 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:19:15,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:19:15,449 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-more-array-sum.wvr.c[2835,2848] [2023-08-30 00:19:15,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:19:15,467 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:19:15,508 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-more-array-sum.wvr.c[2835,2848] [2023-08-30 00:19:15,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:19:15,525 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:19:15,527 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:19:15,533 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:19:15,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15 WrapperNode [2023-08-30 00:19:15,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:19:15,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:19:15,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:19:15,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:19:15,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,606 INFO L138 Inliner]: procedures = 27, calls = 58, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 274 [2023-08-30 00:19:15,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:19:15,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:19:15,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:19:15,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:19:15,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,667 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:19:15,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:19:15,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:19:15,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:19:15,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (1/1) ... [2023-08-30 00:19:15,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:19:15,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:19:15,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:19:15,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:19:15,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:19:15,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:19:15,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:19:15,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:19:15,760 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:19:15,760 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:19:15,760 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:19:15,760 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:19:15,761 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:19:15,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:19:15,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:19:15,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:19:15,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:19:15,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:19:15,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:19:15,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:19:15,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:19:15,764 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:19:15,896 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:19:15,898 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:19:16,467 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:19:16,718 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:19:16,718 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 00:19:16,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:19:16 BoogieIcfgContainer [2023-08-30 00:19:16,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:19:16,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:19:16,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:19:16,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:19:16,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:19:15" (1/3) ... [2023-08-30 00:19:16,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3a1880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:19:16, skipping insertion in model container [2023-08-30 00:19:16,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:19:15" (2/3) ... [2023-08-30 00:19:16,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3a1880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:19:16, skipping insertion in model container [2023-08-30 00:19:16,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:19:16" (3/3) ... [2023-08-30 00:19:16,727 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2023-08-30 00:19:16,742 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:19:16,743 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 00:19:16,743 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:19:16,813 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:19:16,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 211 transitions, 446 flow [2023-08-30 00:19:16,978 INFO L130 PetriNetUnfolder]: 16/208 cut-off events. [2023-08-30 00:19:16,978 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:19:16,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 16/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 252 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 158. Up to 2 conditions per place. [2023-08-30 00:19:16,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 211 transitions, 446 flow [2023-08-30 00:19:16,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 204 transitions, 426 flow [2023-08-30 00:19:16,993 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:19:17,001 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 204 transitions, 426 flow [2023-08-30 00:19:17,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 204 transitions, 426 flow [2023-08-30 00:19:17,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 204 transitions, 426 flow [2023-08-30 00:19:17,038 INFO L130 PetriNetUnfolder]: 16/204 cut-off events. [2023-08-30 00:19:17,039 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:19:17,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 204 events. 16/204 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 250 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 158. Up to 2 conditions per place. [2023-08-30 00:19:17,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 2970 [2023-08-30 00:19:44,307 INFO L134 LiptonReduction]: Checked pairs total: 4447 [2023-08-30 00:19:44,308 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-30 00:19:44,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:19:44,341 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;@7f20e393, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:19:44,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-08-30 00:19:44,353 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:19:44,353 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:19:44,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:19:44,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:19:44,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:19:44,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:19:44,364 INFO L85 PathProgramCache]: Analyzing trace with hash 35461, now seen corresponding path program 1 times [2023-08-30 00:19:44,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:19:44,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099589613] [2023-08-30 00:19:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:19:44,378 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 00:19:44,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:19:44,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:19:44,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:19:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:19:44,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:19:44,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:19:44,648 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:19:44,649 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 00:19:44,696 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 00:19:44,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:19:44,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:19:44,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099589613] [2023-08-30 00:19:44,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099589613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:19:44,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:19:44,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:19:44,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953859640] [2023-08-30 00:19:44,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:19:44,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:19:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:19:44,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:19:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:19:44,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 426 [2023-08-30 00:19:44,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:44,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:19:44,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 426 [2023-08-30 00:19:44,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:19:46,634 INFO L130 PetriNetUnfolder]: 9544/11885 cut-off events. [2023-08-30 00:19:46,634 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2023-08-30 00:19:46,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23920 conditions, 11885 events. 9544/11885 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 55218 event pairs, 4848 based on Foata normal form. 0/2845 useless extension candidates. Maximal degree in co-relation 21472. Up to 11829 conditions per place. [2023-08-30 00:19:46,727 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 50 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-30 00:19:46,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 54 transitions, 228 flow [2023-08-30 00:19:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:19:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:19:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-08-30 00:19:46,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44835680751173707 [2023-08-30 00:19:46,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-08-30 00:19:46,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-08-30 00:19:46,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:19:46,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-08-30 00:19:46,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:46,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 00:19:46,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 00:19:46,783 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 132 flow. Second operand 3 states and 573 transitions. [2023-08-30 00:19:46,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 54 transitions, 228 flow [2023-08-30 00:19:46,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 216 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:19:46,796 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 116 flow [2023-08-30 00:19:46,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-30 00:19:46,808 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -7 predicate places. [2023-08-30 00:19:46,809 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 116 flow [2023-08-30 00:19:46,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:46,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:19:46,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:19:46,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:19:47,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:47,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:19:47,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:19:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash 35460, now seen corresponding path program 1 times [2023-08-30 00:19:47,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:19:47,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864520143] [2023-08-30 00:19:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:19:47,033 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 00:19:47,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:19:47,035 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:19:47,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:19:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:19:47,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:19:47,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:19:47,221 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:19:47,222 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 00:19:47,254 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 00:19:47,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:19:47,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:19:47,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864520143] [2023-08-30 00:19:47,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864520143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:19:47,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:19:47,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:19:47,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368974168] [2023-08-30 00:19:47,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:19:47,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:19:47,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:19:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:19:47,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:19:47,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 426 [2023-08-30 00:19:47,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:47,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:19:47,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 426 [2023-08-30 00:19:47,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:19:50,583 INFO L130 PetriNetUnfolder]: 19073/23753 cut-off events. [2023-08-30 00:19:50,583 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 00:19:50,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47525 conditions, 23753 events. 19073/23753 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 2192. Compared 119060 event pairs, 9693 based on Foata normal form. 0/5697 useless extension candidates. Maximal degree in co-relation 47519. Up to 11826 conditions per place. [2023-08-30 00:19:50,702 INFO L137 encePairwiseOnDemand]: 420/426 looper letters, 95 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2023-08-30 00:19:50,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 102 transitions, 416 flow [2023-08-30 00:19:50,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:19:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:19:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-30 00:19:50,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48513302034428796 [2023-08-30 00:19:50,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-30 00:19:50,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-30 00:19:50,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:19:50,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-30 00:19:50,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states 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 00:19:50,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 00:19:50,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 00:19:50,712 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 116 flow. Second operand 3 states and 620 transitions. [2023-08-30 00:19:50,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 102 transitions, 416 flow [2023-08-30 00:19:50,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 102 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:19:50,714 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 147 flow [2023-08-30 00:19:50,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-08-30 00:19:50,715 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2023-08-30 00:19:50,715 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 147 flow [2023-08-30 00:19:50,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:50,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:19:50,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:19:50,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:19:50,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:50,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:19:50,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:19:50,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1103174, now seen corresponding path program 1 times [2023-08-30 00:19:50,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:19:50,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036687972] [2023-08-30 00:19:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:19:50,927 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 00:19:50,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:19:50,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:19:50,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:19:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:19:51,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:19:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:19:51,051 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 00:19:51,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:19:51,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:19:51,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036687972] [2023-08-30 00:19:51,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036687972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:19:51,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:19:51,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:19:51,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919678236] [2023-08-30 00:19:51,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:19:51,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:19:51,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:19:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:19:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:19:51,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 426 [2023-08-30 00:19:51,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:51,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:19:51,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 426 [2023-08-30 00:19:51,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:19:52,588 INFO L130 PetriNetUnfolder]: 9544/11888 cut-off events. [2023-08-30 00:19:52,588 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 00:19:52,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23802 conditions, 11888 events. 9544/11888 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 55298 event pairs, 4848 based on Foata normal form. 3/2853 useless extension candidates. Maximal degree in co-relation 23793. Up to 11830 conditions per place. [2023-08-30 00:19:52,635 INFO L137 encePairwiseOnDemand]: 419/426 looper letters, 49 selfloop transitions, 4 changer transitions 1/57 dead transitions. [2023-08-30 00:19:52,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 255 flow [2023-08-30 00:19:52,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:19:52,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:19:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 757 transitions. [2023-08-30 00:19:52,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442488262910798 [2023-08-30 00:19:52,638 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 757 transitions. [2023-08-30 00:19:52,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 757 transitions. [2023-08-30 00:19:52,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:19:52,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 757 transitions. [2023-08-30 00:19:52,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states 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 00:19:52,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states 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 00:19:52,644 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states 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 00:19:52,644 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 147 flow. Second operand 4 states and 757 transitions. [2023-08-30 00:19:52,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 57 transitions, 255 flow [2023-08-30 00:19:52,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:19:52,651 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 159 flow [2023-08-30 00:19:52,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-30 00:19:52,653 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2023-08-30 00:19:52,653 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 159 flow [2023-08-30 00:19:52,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:52,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:19:52,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:19:52,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:19:52,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:52,865 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:19:52,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:19:52,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1102015, now seen corresponding path program 1 times [2023-08-30 00:19:52,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:19:52,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365634049] [2023-08-30 00:19:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:19:52,866 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 00:19:52,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:19:52,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:19:52,870 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 (5)] Waiting until timeout for monitored process [2023-08-30 00:19:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:19:52,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:19:52,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:19:53,054 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:19:53,054 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 00:19:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:19:53,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:19:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:19:53,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:19:53,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365634049] [2023-08-30 00:19:53,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365634049] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:19:53,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:19:53,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:19:53,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547404269] [2023-08-30 00:19:53,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:19:53,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:19:53,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:19:53,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:19:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:19:54,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 426 [2023-08-30 00:19:54,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 159 flow. Second operand has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 00:19:54,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:19:54,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 426 [2023-08-30 00:19:54,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:19:57,780 INFO L130 PetriNetUnfolder]: 19081/23767 cut-off events. [2023-08-30 00:19:57,780 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 00:19:57,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47606 conditions, 23767 events. 19081/23767 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 2173. Compared 119918 event pairs, 9693 based on Foata normal form. 0/5711 useless extension candidates. Maximal degree in co-relation 47595. Up to 11825 conditions per place. [2023-08-30 00:19:57,956 INFO L137 encePairwiseOnDemand]: 417/426 looper letters, 94 selfloop transitions, 19 changer transitions 0/116 dead transitions. [2023-08-30 00:19:57,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 116 transitions, 574 flow [2023-08-30 00:19:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:19:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:19:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1097 transitions. [2023-08-30 00:19:57,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291862284820031 [2023-08-30 00:19:57,963 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1097 transitions. [2023-08-30 00:19:57,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1097 transitions. [2023-08-30 00:19:57,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:19:57,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1097 transitions. [2023-08-30 00:19:57,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.83333333333334) internal successors, (1097), 6 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:57,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 426.0) internal successors, (2982), 7 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states 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 00:19:57,974 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 426.0) internal successors, (2982), 7 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states 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 00:19:57,974 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 159 flow. Second operand 6 states and 1097 transitions. [2023-08-30 00:19:57,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 116 transitions, 574 flow [2023-08-30 00:19:57,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 116 transitions, 536 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 00:19:57,978 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 305 flow [2023-08-30 00:19:57,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2023-08-30 00:19:57,979 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2023-08-30 00:19:57,979 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 305 flow [2023-08-30 00:19:57,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 00:19:57,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:19:57,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:19:57,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:19:58,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:58,190 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:19:58,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:19:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1059158904, now seen corresponding path program 1 times [2023-08-30 00:19:58,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:19:58,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961449998] [2023-08-30 00:19:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:19:58,191 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 00:19:58,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:19:58,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:19:58,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:19:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:19:58,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:19:58,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:19:58,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:19:58,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:19:58,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:19:58,477 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:19:58,477 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 17 treesize of output 34 [2023-08-30 00:19:58,517 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 00:19:58,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2023-08-30 00:19:58,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:19:58,786 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-08-30 00:19:58,786 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 2 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 00:19:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:19:58,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:19:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:19:59,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:19:59,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961449998] [2023-08-30 00:19:59,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961449998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:19:59,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:19:59,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:19:59,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182471433] [2023-08-30 00:19:59,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:19:59,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:19:59,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:19:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:19:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:20:01,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 426 [2023-08-30 00:20:01,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states 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 00:20:01,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:01,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 426 [2023-08-30 00:20:01,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:09,189 INFO L130 PetriNetUnfolder]: 44150/55505 cut-off events. [2023-08-30 00:20:09,189 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-30 00:20:09,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111233 conditions, 55505 events. 44150/55505 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 4036. Compared 311747 event pairs, 22359 based on Foata normal form. 0/14349 useless extension candidates. Maximal degree in co-relation 111219. Up to 18374 conditions per place. [2023-08-30 00:20:09,479 INFO L137 encePairwiseOnDemand]: 416/426 looper letters, 220 selfloop transitions, 39 changer transitions 0/262 dead transitions. [2023-08-30 00:20:09,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 262 transitions, 1397 flow [2023-08-30 00:20:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 00:20:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 00:20:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2798 transitions. [2023-08-30 00:20:09,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41050469483568075 [2023-08-30 00:20:09,486 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2798 transitions. [2023-08-30 00:20:09,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2798 transitions. [2023-08-30 00:20:09,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:09,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2798 transitions. [2023-08-30 00:20:09,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 174.875) internal successors, (2798), 16 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states 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 00:20:09,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 426.0) internal successors, (7242), 17 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states 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 00:20:09,505 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 426.0) internal successors, (7242), 17 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states 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 00:20:09,505 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 305 flow. Second operand 16 states and 2798 transitions. [2023-08-30 00:20:09,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 262 transitions, 1397 flow [2023-08-30 00:20:09,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 262 transitions, 1336 flow, removed 26 selfloop flow, removed 1 redundant places. [2023-08-30 00:20:09,511 INFO L231 Difference]: Finished difference. Result has 81 places, 94 transitions, 545 flow [2023-08-30 00:20:09,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=545, PETRI_PLACES=81, PETRI_TRANSITIONS=94} [2023-08-30 00:20:09,512 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2023-08-30 00:20:09,512 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 94 transitions, 545 flow [2023-08-30 00:20:09,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states 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 00:20:09,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:09,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:20:09,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:20:09,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:20:09,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:20:09,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1059158905, now seen corresponding path program 1 times [2023-08-30 00:20:09,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:09,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284255607] [2023-08-30 00:20:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:20:09,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:20:09,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:09,725 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:20:09,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:20:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:20:10,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:20:10,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:10,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:10,094 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 00:20:10,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 00:20:10,432 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-30 00:20:10,433 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 32 [2023-08-30 00:20:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:20:10,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:20:10,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:10,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284255607] [2023-08-30 00:20:10,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284255607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:20:10,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:20:10,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:20:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14165029] [2023-08-30 00:20:10,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:20:10,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:20:10,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:20:10,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:20:10,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 426 [2023-08-30 00:20:10,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 94 transitions, 545 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 00:20:10,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:10,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 426 [2023-08-30 00:20:10,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:14,420 INFO L130 PetriNetUnfolder]: 31165/39825 cut-off events. [2023-08-30 00:20:14,421 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-08-30 00:20:14,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79863 conditions, 39825 events. 31165/39825 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 2597. Compared 226381 event pairs, 15660 based on Foata normal form. 0/11525 useless extension candidates. Maximal degree in co-relation 79846. Up to 39489 conditions per place. [2023-08-30 00:20:14,703 INFO L137 encePairwiseOnDemand]: 423/426 looper letters, 78 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-30 00:20:14,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 82 transitions, 601 flow [2023-08-30 00:20:14,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:20:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:20:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-30 00:20:14,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4522691705790297 [2023-08-30 00:20:14,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-30 00:20:14,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-30 00:20:14,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:14,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-30 00:20:14,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 00:20:14,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 00:20:14,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 00:20:14,710 INFO L175 Difference]: Start difference. First operand has 81 places, 94 transitions, 545 flow. Second operand 3 states and 578 transitions. [2023-08-30 00:20:14,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 82 transitions, 601 flow [2023-08-30 00:20:14,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 569 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-30 00:20:14,714 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 413 flow [2023-08-30 00:20:14,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=79, 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=413, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-08-30 00:20:14,714 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2023-08-30 00:20:14,715 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 413 flow [2023-08-30 00:20:14,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 00:20:14,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:14,715 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:20:14,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:20:14,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:20:14,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:20:14,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:14,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1526873788, now seen corresponding path program 2 times [2023-08-30 00:20:14,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:14,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814674951] [2023-08-30 00:20:14,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:20:14,927 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 00:20:14,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:14,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:20:14,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:20:15,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:20:15,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:20:15,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:20:15,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:15,132 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:20:15,132 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 00:20:15,288 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 00:20:15,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:20:15,883 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 00:20:15,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:15,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814674951] [2023-08-30 00:20:15,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814674951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:20:15,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:20:15,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:20:15,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441379003] [2023-08-30 00:20:15,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:20:15,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:20:15,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:15,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:20:15,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:20:19,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 426 [2023-08-30 00:20:19,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 413 flow. Second operand has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 00:20:19,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:19,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 426 [2023-08-30 00:20:19,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:20:21,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:23,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:24,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:26,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:28,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:29,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:30,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:32,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:33,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:20:35,215 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 [] [2023-08-30 00:20:48,395 INFO L130 PetriNetUnfolder]: 98447/125845 cut-off events. [2023-08-30 00:20:48,395 INFO L131 PetriNetUnfolder]: For 287/287 co-relation queries the response was YES. [2023-08-30 00:20:48,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252115 conditions, 125845 events. 98447/125845 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 5858. Compared 784912 event pairs, 49542 based on Foata normal form. 24/36607 useless extension candidates. Maximal degree in co-relation 252096. Up to 19730 conditions per place. [2023-08-30 00:20:49,219 INFO L137 encePairwiseOnDemand]: 418/426 looper letters, 402 selfloop transitions, 41 changer transitions 0/446 dead transitions. [2023-08-30 00:20:49,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 446 transitions, 2325 flow [2023-08-30 00:20:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:20:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:20:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2407 transitions. [2023-08-30 00:20:49,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708528951486698 [2023-08-30 00:20:49,225 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2407 transitions. [2023-08-30 00:20:49,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2407 transitions. [2023-08-30 00:20:49,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:20:49,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2407 transitions. [2023-08-30 00:20:49,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 200.58333333333334) internal successors, (2407), 12 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:20:49,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 426.0) internal successors, (5538), 13 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states 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 00:20:49,238 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 426.0) internal successors, (5538), 13 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states 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 00:20:49,239 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 413 flow. Second operand 12 states and 2407 transitions. [2023-08-30 00:20:49,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 446 transitions, 2325 flow [2023-08-30 00:20:49,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 446 transitions, 2324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:20:49,247 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 755 flow [2023-08-30 00:20:49,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=755, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2023-08-30 00:20:49,248 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 36 predicate places. [2023-08-30 00:20:49,248 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 755 flow [2023-08-30 00:20:49,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 00:20:49,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:20:49,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:20:49,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:20:49,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:20:49,461 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:20:49,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:20:49,462 INFO L85 PathProgramCache]: Analyzing trace with hash -55512832, now seen corresponding path program 1 times [2023-08-30 00:20:49,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:20:49,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254996283] [2023-08-30 00:20:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:20:49,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:20:49,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:20:49,463 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:20:49,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:20:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:20:49,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:20:49,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:20:49,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:49,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:49,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:49,692 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 00:20:49,692 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 17 treesize of output 34 [2023-08-30 00:20:49,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 00:20:49,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:20:49,899 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-08-30 00:20:49,900 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 2 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 00:20:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:20:50,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:20:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:20:50,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:20:50,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254996283] [2023-08-30 00:20:50,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254996283] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:20:50,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:20:50,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:20:50,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396834954] [2023-08-30 00:20:50,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:20:50,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:20:50,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:20:50,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:20:50,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:20:51,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 426 [2023-08-30 00:20:51,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 755 flow. Second operand has 8 states, 8 states have (on average 160.75) internal successors, (1286), 8 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states 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 00:20:51,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:20:51,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 426 [2023-08-30 00:20:51,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:06,234 INFO L130 PetriNetUnfolder]: 94493/120725 cut-off events. [2023-08-30 00:21:06,234 INFO L131 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2023-08-30 00:21:06,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242022 conditions, 120725 events. 94493/120725 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 5615. Compared 746947 event pairs, 47393 based on Foata normal form. 0/35756 useless extension candidates. Maximal degree in co-relation 241995. Up to 56453 conditions per place. [2023-08-30 00:21:07,013 INFO L137 encePairwiseOnDemand]: 415/426 looper letters, 236 selfloop transitions, 41 changer transitions 0/280 dead transitions. [2023-08-30 00:21:07,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 280 transitions, 1811 flow [2023-08-30 00:21:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 00:21:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 00:21:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2785 transitions. [2023-08-30 00:21:07,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40859741784037557 [2023-08-30 00:21:07,022 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2785 transitions. [2023-08-30 00:21:07,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2785 transitions. [2023-08-30 00:21:07,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:07,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2785 transitions. [2023-08-30 00:21:07,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 174.0625) internal successors, (2785), 16 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states 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 00:21:07,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 426.0) internal successors, (7242), 17 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states 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 00:21:07,040 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 426.0) internal successors, (7242), 17 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states 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 00:21:07,040 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 755 flow. Second operand 16 states and 2785 transitions. [2023-08-30 00:21:07,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 280 transitions, 1811 flow [2023-08-30 00:21:07,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 280 transitions, 1701 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-08-30 00:21:07,050 INFO L231 Difference]: Finished difference. Result has 114 places, 104 transitions, 796 flow [2023-08-30 00:21:07,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=796, PETRI_PLACES=114, PETRI_TRANSITIONS=104} [2023-08-30 00:21:07,051 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 52 predicate places. [2023-08-30 00:21:07,051 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 104 transitions, 796 flow [2023-08-30 00:21:07,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.75) internal successors, (1286), 8 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states 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 00:21:07,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:07,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:21:07,067 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 [2023-08-30 00:21:07,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:07,267 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:21:07,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash -55512831, now seen corresponding path program 1 times [2023-08-30 00:21:07,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:07,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869358791] [2023-08-30 00:21:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:07,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:07,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:07,270 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:07,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:21:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:07,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:21:07,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:07,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:07,451 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 00:21:07,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 00:21:07,587 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:21:07,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:21:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:21:07,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:07,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:07,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869358791] [2023-08-30 00:21:07,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869358791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:07,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:07,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:21:07,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138269113] [2023-08-30 00:21:07,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:07,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:21:07,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:07,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:21:07,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:21:07,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 426 [2023-08-30 00:21:07,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 104 transitions, 796 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states 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 00:21:07,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:07,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 426 [2023-08-30 00:21:07,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:19,446 INFO L130 PetriNetUnfolder]: 90496/115323 cut-off events. [2023-08-30 00:21:19,446 INFO L131 PetriNetUnfolder]: For 1612/1612 co-relation queries the response was YES. [2023-08-30 00:21:19,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231712 conditions, 115323 events. 90496/115323 cut-off events. For 1612/1612 co-relation queries the response was YES. Maximal size of possible extension queue 5590. Compared 711469 event pairs, 45189 based on Foata normal form. 162/34900 useless extension candidates. Maximal degree in co-relation 231678. Up to 114251 conditions per place. [2023-08-30 00:21:20,258 INFO L137 encePairwiseOnDemand]: 423/426 looper letters, 98 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-08-30 00:21:20,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 102 transitions, 990 flow [2023-08-30 00:21:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:21:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:21:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-08-30 00:21:20,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44992175273865415 [2023-08-30 00:21:20,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-08-30 00:21:20,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-08-30 00:21:20,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:20,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-08-30 00:21:20,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:20,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 00:21:20,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 00:21:20,265 INFO L175 Difference]: Start difference. First operand has 114 places, 104 transitions, 796 flow. Second operand 3 states and 575 transitions. [2023-08-30 00:21:20,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 102 transitions, 990 flow [2023-08-30 00:21:20,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 102 transitions, 925 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-30 00:21:20,275 INFO L231 Difference]: Finished difference. Result has 103 places, 102 transitions, 729 flow [2023-08-30 00:21:20,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=729, PETRI_PLACES=103, PETRI_TRANSITIONS=102} [2023-08-30 00:21:20,276 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 41 predicate places. [2023-08-30 00:21:20,276 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 102 transitions, 729 flow [2023-08-30 00:21:20,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states 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 00:21:20,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:20,277 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 00:21:20,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:21:20,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:20,489 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:21:20,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1553227453, now seen corresponding path program 2 times [2023-08-30 00:21:20,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:20,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586801522] [2023-08-30 00:21:20,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:21:20,490 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 00:21:20,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:20,491 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:20,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:21:20,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:21:20,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:21:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:21:20,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:20,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:20,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:20,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:20,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:21:20,667 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 00:21:20,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 00:21:20,687 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:21:20,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:21:20,811 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 00:21:20,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:21:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 00:21:20,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:20,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:20,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586801522] [2023-08-30 00:21:20,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586801522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:20,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:20,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:21:20,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858036618] [2023-08-30 00:21:20,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:20,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:21:20,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:20,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:21:20,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:21:23,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:21:25,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:21:25,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 426 [2023-08-30 00:21:25,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 102 transitions, 729 flow. Second operand has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states 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 00:21:25,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:25,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 426 [2023-08-30 00:21:25,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:36,383 INFO L130 PetriNetUnfolder]: 90495/115313 cut-off events. [2023-08-30 00:21:36,383 INFO L131 PetriNetUnfolder]: For 1468/1468 co-relation queries the response was YES. [2023-08-30 00:21:36,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231626 conditions, 115313 events. 90495/115313 cut-off events. For 1468/1468 co-relation queries the response was YES. Maximal size of possible extension queue 5463. Compared 709966 event pairs, 45189 based on Foata normal form. 0/34738 useless extension candidates. Maximal degree in co-relation 231592. Up to 114228 conditions per place. [2023-08-30 00:21:37,206 INFO L137 encePairwiseOnDemand]: 423/426 looper letters, 84 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2023-08-30 00:21:37,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 98 transitions, 874 flow [2023-08-30 00:21:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:21:37,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:21:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 733 transitions. [2023-08-30 00:21:37,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301643192488263 [2023-08-30 00:21:37,209 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 733 transitions. [2023-08-30 00:21:37,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 733 transitions. [2023-08-30 00:21:37,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:37,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 733 transitions. [2023-08-30 00:21:37,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:37,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states 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 00:21:37,213 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states 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 00:21:37,213 INFO L175 Difference]: Start difference. First operand has 103 places, 102 transitions, 729 flow. Second operand 4 states and 733 transitions. [2023-08-30 00:21:37,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 98 transitions, 874 flow [2023-08-30 00:21:37,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 98 transitions, 873 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:21:37,222 INFO L231 Difference]: Finished difference. Result has 103 places, 98 transitions, 705 flow [2023-08-30 00:21:37,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=705, PETRI_PLACES=103, PETRI_TRANSITIONS=98} [2023-08-30 00:21:37,223 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 41 predicate places. [2023-08-30 00:21:37,223 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 98 transitions, 705 flow [2023-08-30 00:21:37,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states 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 00:21:37,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:37,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:21:37,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:21:37,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:37,438 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:21:37,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1720903423, now seen corresponding path program 1 times [2023-08-30 00:21:37,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:37,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384059071] [2023-08-30 00:21:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:37,438 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 00:21:37,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:37,439 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:37,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:21:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:37,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:21:37,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:21:37,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:21:37,700 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 25 treesize of output 21 [2023-08-30 00:21:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:21:37,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:37,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384059071] [2023-08-30 00:21:37,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384059071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:21:37,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:21:37,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 00:21:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736979955] [2023-08-30 00:21:37,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:21:37,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:21:37,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:37,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:21:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:21:39,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 426 [2023-08-30 00:21:39,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 98 transitions, 705 flow. Second operand has 10 states, 10 states have (on average 166.4) internal successors, (1664), 10 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 00:21:39,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:39,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 426 [2023-08-30 00:21:39,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:57,492 INFO L130 PetriNetUnfolder]: 139152/182523 cut-off events. [2023-08-30 00:21:57,492 INFO L131 PetriNetUnfolder]: For 3582/3582 co-relation queries the response was YES. [2023-08-30 00:21:58,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367496 conditions, 182523 events. 139152/182523 cut-off events. For 3582/3582 co-relation queries the response was YES. Maximal size of possible extension queue 9237. Compared 1258397 event pairs, 43222 based on Foata normal form. 0/61012 useless extension candidates. Maximal degree in co-relation 367461. Up to 84563 conditions per place. [2023-08-30 00:21:58,852 INFO L137 encePairwiseOnDemand]: 418/426 looper letters, 170 selfloop transitions, 38 changer transitions 0/210 dead transitions. [2023-08-30 00:21:58,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 210 transitions, 1419 flow [2023-08-30 00:21:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:21:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:21:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1646 transitions. [2023-08-30 00:21:58,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42931664058424623 [2023-08-30 00:21:58,856 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1646 transitions. [2023-08-30 00:21:58,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1646 transitions. [2023-08-30 00:21:58,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:58,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1646 transitions. [2023-08-30 00:21:58,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.88888888888889) internal successors, (1646), 9 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states 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 00:21:58,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 426.0) internal successors, (4260), 10 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states 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 00:21:58,861 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 426.0) internal successors, (4260), 10 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states 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 00:21:58,861 INFO L175 Difference]: Start difference. First operand has 103 places, 98 transitions, 705 flow. Second operand 9 states and 1646 transitions. [2023-08-30 00:21:58,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 210 transitions, 1419 flow [2023-08-30 00:21:58,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 210 transitions, 1407 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:21:58,873 INFO L231 Difference]: Finished difference. Result has 111 places, 102 transitions, 799 flow [2023-08-30 00:21:58,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=799, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2023-08-30 00:21:58,873 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 49 predicate places. [2023-08-30 00:21:58,874 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 799 flow [2023-08-30 00:21:58,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.4) internal successors, (1664), 10 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 00:21:58,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:58,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:21:58,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:21:59,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:21:59,084 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:21:59,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1720903424, now seen corresponding path program 1 times [2023-08-30 00:21:59,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:59,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634147148] [2023-08-30 00:21:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:21:59,085 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 00:21:59,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:59,086 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:21:59,086 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 (13)] Waiting until timeout for monitored process [2023-08-30 00:21:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:21:59,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:21:59,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:59,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 00:21:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:21:59,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:21:59,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:21:59,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634147148] [2023-08-30 00:21:59,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634147148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:21:59,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:21:59,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:21:59,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838663925] [2023-08-30 00:21:59,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:21:59,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:21:59,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:21:59,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:21:59,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:21:59,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 426 [2023-08-30 00:21:59,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 799 flow. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states 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 00:21:59,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:21:59,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 426 [2023-08-30 00:21:59,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:09,876 INFO L130 PetriNetUnfolder]: 79225/106232 cut-off events. [2023-08-30 00:22:09,876 INFO L131 PetriNetUnfolder]: For 15576/17847 co-relation queries the response was YES. [2023-08-30 00:22:10,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227782 conditions, 106232 events. 79225/106232 cut-off events. For 15576/17847 co-relation queries the response was YES. Maximal size of possible extension queue 5297. Compared 742599 event pairs, 47883 based on Foata normal form. 2271/45614 useless extension candidates. Maximal degree in co-relation 227745. Up to 105021 conditions per place. [2023-08-30 00:22:10,742 INFO L137 encePairwiseOnDemand]: 421/426 looper letters, 79 selfloop transitions, 16 changer transitions 0/99 dead transitions. [2023-08-30 00:22:10,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 99 transitions, 983 flow [2023-08-30 00:22:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:22:10,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:22:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 728 transitions. [2023-08-30 00:22:10,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272300469483568 [2023-08-30 00:22:10,744 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 728 transitions. [2023-08-30 00:22:10,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 728 transitions. [2023-08-30 00:22:10,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:10,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 728 transitions. [2023-08-30 00:22:10,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states 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 00:22:10,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states 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 00:22:10,747 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states 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 00:22:10,747 INFO L175 Difference]: Start difference. First operand has 111 places, 102 transitions, 799 flow. Second operand 4 states and 728 transitions. [2023-08-30 00:22:10,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 99 transitions, 983 flow [2023-08-30 00:22:10,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 99 transitions, 931 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 00:22:10,776 INFO L231 Difference]: Finished difference. Result has 107 places, 99 transitions, 773 flow [2023-08-30 00:22:10,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=773, PETRI_PLACES=107, PETRI_TRANSITIONS=99} [2023-08-30 00:22:10,777 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 45 predicate places. [2023-08-30 00:22:10,777 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 99 transitions, 773 flow [2023-08-30 00:22:10,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states 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 00:22:10,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:10,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:22:10,785 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 (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:22:10,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:10,978 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:22:10,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1720903425, now seen corresponding path program 1 times [2023-08-30 00:22:10,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:10,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076352628] [2023-08-30 00:22:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:10,979 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 00:22:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:10,980 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:22:10,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:22:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:11,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:22:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:11,194 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:22:11,195 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 00:22:11,277 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:22:11,277 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 00:22:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:22:11,383 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 00:22:11,393 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:22:11,394 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 00:22:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:22:11,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:22:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:22:13,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:13,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076352628] [2023-08-30 00:22:13,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076352628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:22:13,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:22:13,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:22:13,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446285248] [2023-08-30 00:22:13,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:22:13,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:22:13,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:13,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:22:13,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:22:17,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 426 [2023-08-30 00:22:17,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 99 transitions, 773 flow. Second operand has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states 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 00:22:17,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:17,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 426 [2023-08-30 00:22:17,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:22,193 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 [0, 1] [2023-08-30 00:22:42,669 INFO L130 PetriNetUnfolder]: 119876/159209 cut-off events. [2023-08-30 00:22:42,669 INFO L131 PetriNetUnfolder]: For 23405/23405 co-relation queries the response was YES. [2023-08-30 00:22:43,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343821 conditions, 159209 events. 119876/159209 cut-off events. For 23405/23405 co-relation queries the response was YES. Maximal size of possible extension queue 7457. Compared 1118877 event pairs, 45904 based on Foata normal form. 0/67341 useless extension candidates. Maximal degree in co-relation 343785. Up to 33349 conditions per place. [2023-08-30 00:22:43,929 INFO L137 encePairwiseOnDemand]: 415/426 looper letters, 622 selfloop transitions, 61 changer transitions 0/685 dead transitions. [2023-08-30 00:22:43,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 685 transitions, 3699 flow [2023-08-30 00:22:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 00:22:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 00:22:43,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5396 transitions. [2023-08-30 00:22:43,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2023-08-30 00:22:43,939 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5396 transitions. [2023-08-30 00:22:43,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5396 transitions. [2023-08-30 00:22:43,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:43,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5396 transitions. [2023-08-30 00:22:43,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 174.06451612903226) internal successors, (5396), 31 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states 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 00:22:43,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 426.0) internal successors, (13632), 32 states have internal predecessors, (13632), 0 states have call successors, (0), 0 states 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 00:22:43,957 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 426.0) internal successors, (13632), 32 states have internal predecessors, (13632), 0 states have call successors, (0), 0 states 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 00:22:43,957 INFO L175 Difference]: Start difference. First operand has 107 places, 99 transitions, 773 flow. Second operand 31 states and 5396 transitions. [2023-08-30 00:22:43,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 685 transitions, 3699 flow [2023-08-30 00:22:44,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 685 transitions, 3682 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:22:44,031 INFO L231 Difference]: Finished difference. Result has 141 places, 123 transitions, 1053 flow [2023-08-30 00:22:44,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1053, PETRI_PLACES=141, PETRI_TRANSITIONS=123} [2023-08-30 00:22:44,032 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 79 predicate places. [2023-08-30 00:22:44,032 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 123 transitions, 1053 flow [2023-08-30 00:22:44,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states 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 00:22:44,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:44,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:22:44,043 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 [2023-08-30 00:22:44,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:44,236 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:22:44,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1720903426, now seen corresponding path program 1 times [2023-08-30 00:22:44,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:44,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710744819] [2023-08-30 00:22:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:44,237 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 00:22:44,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:44,238 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:22:44,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:22:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:44,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:22:44,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:44,413 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:22:44,413 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 00:22:44,445 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 00:22:44,446 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 00:22:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:22:44,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:22:44,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:44,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710744819] [2023-08-30 00:22:44,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710744819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:22:44,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:22:44,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:22:44,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022399996] [2023-08-30 00:22:44,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:22:44,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:22:44,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:44,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:22:44,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:22:44,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 426 [2023-08-30 00:22:44,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 123 transitions, 1053 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states 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 00:22:44,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:44,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 426 [2023-08-30 00:22:44,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:22:54,245 INFO L130 PetriNetUnfolder]: 62082/84297 cut-off events. [2023-08-30 00:22:54,245 INFO L131 PetriNetUnfolder]: For 138175/146283 co-relation queries the response was YES. [2023-08-30 00:22:54,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211624 conditions, 84297 events. 62082/84297 cut-off events. For 138175/146283 co-relation queries the response was YES. Maximal size of possible extension queue 3957. Compared 589170 event pairs, 36889 based on Foata normal form. 6484/53181 useless extension candidates. Maximal degree in co-relation 211582. Up to 83419 conditions per place. [2023-08-30 00:22:55,063 INFO L137 encePairwiseOnDemand]: 421/426 looper letters, 98 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2023-08-30 00:22:55,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 120 transitions, 1265 flow [2023-08-30 00:22:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:22:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:22:55,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 713 transitions. [2023-08-30 00:22:55,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184272300469484 [2023-08-30 00:22:55,065 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 713 transitions. [2023-08-30 00:22:55,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 713 transitions. [2023-08-30 00:22:55,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:22:55,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 713 transitions. [2023-08-30 00:22:55,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.25) internal successors, (713), 4 states have internal predecessors, (713), 0 states have call successors, (0), 0 states 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 00:22:55,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states 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 00:22:55,068 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states 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 00:22:55,068 INFO L175 Difference]: Start difference. First operand has 141 places, 123 transitions, 1053 flow. Second operand 4 states and 713 transitions. [2023-08-30 00:22:55,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 120 transitions, 1265 flow [2023-08-30 00:22:55,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 120 transitions, 1182 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-30 00:22:55,303 INFO L231 Difference]: Finished difference. Result has 133 places, 120 transitions, 986 flow [2023-08-30 00:22:55,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=986, PETRI_PLACES=133, PETRI_TRANSITIONS=120} [2023-08-30 00:22:55,304 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 71 predicate places. [2023-08-30 00:22:55,304 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 120 transitions, 986 flow [2023-08-30 00:22:55,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states 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 00:22:55,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:55,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:22:55,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:22:55,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:55,505 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 00:22:55,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:55,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1808194284, now seen corresponding path program 1 times [2023-08-30 00:22:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:55,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063830342] [2023-08-30 00:22:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:22:55,506 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 00:22:55,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:55,507 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:22:55,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:22:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:22:55,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:22:55,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:22:55,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:22:55,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:22:55,725 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 00:22:55,725 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 17 treesize of output 34 [2023-08-30 00:22:55,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 00:22:55,850 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-08-30 00:22:55,850 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 2 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 00:22:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:22:56,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:22:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:22:56,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:56,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063830342] [2023-08-30 00:22:56,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063830342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:22:56,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:22:56,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:22:56,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850432515] [2023-08-30 00:22:56,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:22:56,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:22:56,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:56,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:22:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:22:57,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 426 [2023-08-30 00:22:57,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 120 transitions, 986 flow. Second operand has 8 states, 8 states have (on average 161.25) internal successors, (1290), 8 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 00:22:57,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:57,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 426 [2023-08-30 00:22:57,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand