./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-trans.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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:35:12,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:35:12,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:35:12,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:35:12,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:35:12,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:35:12,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:35:12,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:35:12,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:35:12,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:35:12,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:35:12,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:35:12,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:35:12,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:35:12,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:35:12,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:35:12,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:35:12,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:35:12,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:35:12,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:35:12,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:35:12,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:35:12,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:35:12,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:35:12,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:35:12,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:35:12,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:35:12,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:35:12,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:35:12,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:35:12,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:35:12,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:35:12,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:35:12,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:35:12,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:35:12,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:35:12,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:35:12,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:35:12,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:35:12,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:35:12,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:35:12,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:35:12,386 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:35:12,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:35:12,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:35:12,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:35:12,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:35:12,388 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:35:12,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:35:12,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:35:12,389 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:35:12,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:35:12,390 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:35:12,390 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:35:12,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:35:12,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:35:12,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:35:12,391 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:35:12,391 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:35:12,391 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:35:12,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:35:12,391 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:35:12,392 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:35:12,392 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:35:12,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:35:12,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:35:12,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:35:12,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:35:12,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:35:12,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:35:12,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:35:12,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:35:12,393 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:35:12,394 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:35:12,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:35:12,394 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:35:12,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:35:12,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:35:12,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:35:12,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:35:12,722 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:35:12,722 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:35:12,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-08-30 04:35:13,961 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:35:14,191 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:35:14,191 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-08-30 04:35:14,199 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f75ea91e1/83cff51d6a88438ab217ac5621d06388/FLAG775929d0d [2023-08-30 04:35:14,216 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f75ea91e1/83cff51d6a88438ab217ac5621d06388 [2023-08-30 04:35:14,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:35:14,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:35:14,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:35:14,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:35:14,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:35:14,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:35:14" (1/1) ... [2023-08-30 04:35:14,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c200909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:14, skipping insertion in model container [2023-08-30 04:35:14,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:35:14" (1/1) ... [2023-08-30 04:35:14,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:35:14,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:35:14,449 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/array-eq-trans.wvr.c[2737,2750] [2023-08-30 04:35:14,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:35:14,473 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 04:35:14,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3133783e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:14, skipping insertion in model container [2023-08-30 04:35:14,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:35:14,476 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 04:35:14,478 INFO L158 Benchmark]: Toolchain (without parser) took 256.77ms. Allocated memory is still 79.7MB. Free memory was 56.4MB in the beginning and 46.4MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 04:35:14,478 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 79.7MB. Free memory was 56.7MB in the beginning and 56.7MB in the end (delta: 73.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 04:35:14,479 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.02ms. Allocated memory is still 79.7MB. Free memory was 56.2MB in the beginning and 46.4MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 04:35:14,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 79.7MB. Free memory was 56.7MB in the beginning and 56.7MB in the end (delta: 73.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 253.02ms. Allocated memory is still 79.7MB. Free memory was 56.2MB in the beginning and 46.4MB 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: 111]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-trans.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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:35:16,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:35:16,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:35:16,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:35:16,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:35:16,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:35:16,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:35:16,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:35:16,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:35:16,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:35:16,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:35:16,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:35:16,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:35:16,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:35:16,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:35:16,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:35:16,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:35:16,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:35:16,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:35:16,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:35:16,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:35:16,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:35:16,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:35:16,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:35:16,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:35:16,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:35:16,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:35:16,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:35:16,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:35:16,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:35:16,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:35:16,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:35:16,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:35:16,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:35:16,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:35:16,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:35:16,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:35:16,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:35:16,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:35:16,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:35:16,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:35:16,301 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 04:35:16,336 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:35:16,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:35:16,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:35:16,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:35:16,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:35:16,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:35:16,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:35:16,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:35:16,340 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:35:16,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:35:16,341 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:35:16,341 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:35:16,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:35:16,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:35:16,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:35:16,342 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:35:16,342 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:35:16,342 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:35:16,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:35:16,343 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:35:16,343 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 04:35:16,343 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 04:35:16,343 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:35:16,344 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:35:16,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:35:16,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:35:16,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:35:16,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:35:16,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:35:16,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:35:16,345 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 04:35:16,345 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 04:35:16,346 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:35:16,346 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:35:16,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:35:16,346 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 04:35:16,346 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:35:16,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:35:16,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:35:16,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:35:16,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:35:16,694 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:35:16,694 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:35:16,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-08-30 04:35:17,937 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:35:18,139 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:35:18,140 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-08-30 04:35:18,151 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5975ea1f/adb9e91ceced4b3189facda0860c0dc1/FLAG8c5dd35df [2023-08-30 04:35:18,174 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5975ea1f/adb9e91ceced4b3189facda0860c0dc1 [2023-08-30 04:35:18,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:35:18,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:35:18,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:35:18,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:35:18,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:35:18,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da58220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18, skipping insertion in model container [2023-08-30 04:35:18,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:35:18,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:35:18,389 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c[2737,2750] [2023-08-30 04:35:18,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:35:18,423 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 04:35:18,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:35:18,450 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c[2737,2750] [2023-08-30 04:35:18,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:35:18,457 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:35:18,477 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c[2737,2750] [2023-08-30 04:35:18,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:35:18,495 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:35:18,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18 WrapperNode [2023-08-30 04:35:18,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:35:18,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:35:18,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:35:18,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:35:18,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,551 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 204 [2023-08-30 04:35:18,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:35:18,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:35:18,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:35:18,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:35:18,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,612 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:35:18,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:35:18,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:35:18,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:35:18,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (1/1) ... [2023-08-30 04:35:18,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:35:18,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:35:18,650 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 04:35:18,672 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 04:35:18,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:35:18,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 04:35:18,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:35:18,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 04:35:18,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 04:35:18,686 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 04:35:18,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 04:35:18,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 04:35:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 04:35:18,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 04:35:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 04:35:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:35:18,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:35:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:35:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 04:35:18,689 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 04:35:18,893 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:35:18,895 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:35:19,589 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:35:19,600 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:35:19,600 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 04:35:19,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:35:19 BoogieIcfgContainer [2023-08-30 04:35:19,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:35:19,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:35:19,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:35:19,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:35:19,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:35:18" (1/3) ... [2023-08-30 04:35:19,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e89f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:35:19, skipping insertion in model container [2023-08-30 04:35:19,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:35:18" (2/3) ... [2023-08-30 04:35:19,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e89f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:35:19, skipping insertion in model container [2023-08-30 04:35:19,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:35:19" (3/3) ... [2023-08-30 04:35:19,610 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2023-08-30 04:35:19,625 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:35:19,625 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-08-30 04:35:19,625 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:35:19,790 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:35:19,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 327 transitions, 678 flow [2023-08-30 04:35:19,975 INFO L130 PetriNetUnfolder]: 30/324 cut-off events. [2023-08-30 04:35:19,976 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:35:19,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 324 events. 30/324 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 481 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2023-08-30 04:35:19,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 327 transitions, 678 flow [2023-08-30 04:35:19,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 300 places, 320 transitions, 658 flow [2023-08-30 04:35:19,998 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:35:20,013 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 300 places, 320 transitions, 658 flow [2023-08-30 04:35:20,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 300 places, 320 transitions, 658 flow [2023-08-30 04:35:20,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 320 transitions, 658 flow [2023-08-30 04:35:20,090 INFO L130 PetriNetUnfolder]: 30/320 cut-off events. [2023-08-30 04:35:20,091 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:35:20,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 320 events. 30/320 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 477 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2023-08-30 04:35:20,097 INFO L119 LiptonReduction]: Number of co-enabled transitions 4560 [2023-08-30 04:36:38,476 INFO L134 LiptonReduction]: Checked pairs total: 7632 [2023-08-30 04:36:38,476 INFO L136 LiptonReduction]: Total number of compositions: 396 [2023-08-30 04:36:38,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:36:38,495 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;@7d433b5a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:36:38,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2023-08-30 04:36:38,498 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 04:36:38,498 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:36:38,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:38,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:36:38,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:36:38,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:38,504 INFO L85 PathProgramCache]: Analyzing trace with hash 40080, now seen corresponding path program 1 times [2023-08-30 04:36:38,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:38,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277089301] [2023-08-30 04:36:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:36:38,516 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 04:36:38,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:38,520 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 04:36:38,527 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 04:36:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:36:38,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:36:38,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:38,945 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 04:36:38,946 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 04:36:38,987 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 04:36:38,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:36:38,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:38,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277089301] [2023-08-30 04:36:38,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277089301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:36:38,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:36:38,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:36:38,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258146417] [2023-08-30 04:36:38,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:36:39,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:36:39,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:39,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:36:39,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:36:39,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 723 [2023-08-30 04:36:39,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 04:36:39,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:39,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 723 [2023-08-30 04:36:39,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:41,852 INFO L130 PetriNetUnfolder]: 8875/12108 cut-off events. [2023-08-30 04:36:41,852 INFO L131 PetriNetUnfolder]: For 250/250 co-relation queries the response was YES. [2023-08-30 04:36:41,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24547 conditions, 12108 events. 8875/12108 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 1211. Compared 61852 event pairs, 6734 based on Foata normal form. 0/3153 useless extension candidates. Maximal degree in co-relation 11012. Up to 6057 conditions per place. [2023-08-30 04:36:41,940 INFO L137 encePairwiseOnDemand]: 713/723 looper letters, 132 selfloop transitions, 6 changer transitions 0/138 dead transitions. [2023-08-30 04:36:41,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 138 transitions, 588 flow [2023-08-30 04:36:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:36:41,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:36:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1013 transitions. [2023-08-30 04:36:41,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467035500230521 [2023-08-30 04:36:41,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1013 transitions. [2023-08-30 04:36:41,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1013 transitions. [2023-08-30 04:36:41,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:41,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1013 transitions. [2023-08-30 04:36:41,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states 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 04:36:41,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:41,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:41,992 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 162 flow. Second operand 3 states and 1013 transitions. [2023-08-30 04:36:41,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 138 transitions, 588 flow [2023-08-30 04:36:42,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 138 transitions, 564 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 04:36:42,012 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 198 flow [2023-08-30 04:36:42,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-08-30 04:36:42,017 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2023-08-30 04:36:42,018 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 198 flow [2023-08-30 04:36:42,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 04:36:42,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:42,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:36:42,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 04:36:42,232 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 04:36:42,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:36:42,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:42,234 INFO L85 PathProgramCache]: Analyzing trace with hash 40079, now seen corresponding path program 1 times [2023-08-30 04:36:42,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:42,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7650746] [2023-08-30 04:36:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:36:42,235 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 04:36:42,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:42,236 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 04:36:42,240 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 04:36:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:36:42,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:36:42,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:42,409 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 04:36:42,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 04:36:42,444 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 04:36:42,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:36:42,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:42,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7650746] [2023-08-30 04:36:42,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7650746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:36:42,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:36:42,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:36:42,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132454100] [2023-08-30 04:36:42,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:36:42,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:36:42,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:42,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:36:42,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:36:42,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 723 [2023-08-30 04:36:42,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 04:36:42,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:42,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 723 [2023-08-30 04:36:42,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:44,331 INFO L130 PetriNetUnfolder]: 8875/12102 cut-off events. [2023-08-30 04:36:44,332 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-08-30 04:36:44,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24342 conditions, 12102 events. 8875/12102 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 1211. Compared 61891 event pairs, 6734 based on Foata normal form. 4/3163 useless extension candidates. Maximal degree in co-relation 12151. Up to 12102 conditions per place. [2023-08-30 04:36:44,387 INFO L137 encePairwiseOnDemand]: 719/723 looper letters, 72 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-08-30 04:36:44,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 338 flow [2023-08-30 04:36:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:36:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:36:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 941 transitions. [2023-08-30 04:36:44,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.433840479483633 [2023-08-30 04:36:44,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 941 transitions. [2023-08-30 04:36:44,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 941 transitions. [2023-08-30 04:36:44,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:44,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 941 transitions. [2023-08-30 04:36:44,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 states 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 04:36:44,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:44,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:44,403 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 198 flow. Second operand 3 states and 941 transitions. [2023-08-30 04:36:44,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 338 flow [2023-08-30 04:36:44,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:36:44,406 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 182 flow [2023-08-30 04:36:44,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2023-08-30 04:36:44,407 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-08-30 04:36:44,407 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 182 flow [2023-08-30 04:36:44,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 04:36:44,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:44,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:36:44,418 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 04:36:44,618 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 04:36:44,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:36:44,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:44,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1246476, now seen corresponding path program 1 times [2023-08-30 04:36:44,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:44,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426240379] [2023-08-30 04:36:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:36:44,620 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 04:36:44,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:44,625 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 04:36:44,627 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 04:36:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:36:44,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 04:36:44,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:44,818 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 04:36:44,818 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 04:36:44,883 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 04:36:44,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:36:45,072 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 04:36:45,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:45,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426240379] [2023-08-30 04:36:45,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426240379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:36:45,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:36:45,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 04:36:45,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717420015] [2023-08-30 04:36:45,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:36:45,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:36:45,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:45,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:36:45,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:36:46,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 723 [2023-08-30 04:36:46,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states 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 04:36:46,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:46,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 723 [2023-08-30 04:36:46,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:50,767 INFO L130 PetriNetUnfolder]: 13322/18167 cut-off events. [2023-08-30 04:36:50,767 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2023-08-30 04:36:50,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36539 conditions, 18167 events. 13322/18167 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 1680. Compared 97793 event pairs, 10101 based on Foata normal form. 0/4740 useless extension candidates. Maximal degree in co-relation 36531. Up to 6055 conditions per place. [2023-08-30 04:36:50,834 INFO L137 encePairwiseOnDemand]: 711/723 looper letters, 185 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2023-08-30 04:36:50,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 212 transitions, 926 flow [2023-08-30 04:36:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:36:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:36:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1871 transitions. [2023-08-30 04:36:50,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43130474873213465 [2023-08-30 04:36:50,842 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1871 transitions. [2023-08-30 04:36:50,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1871 transitions. [2023-08-30 04:36:50,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:50,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1871 transitions. [2023-08-30 04:36:50,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 311.8333333333333) internal successors, (1871), 6 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states 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 04:36:50,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 723.0) internal successors, (5061), 7 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states 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 04:36:50,855 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 723.0) internal successors, (5061), 7 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states 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 04:36:50,855 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 182 flow. Second operand 6 states and 1871 transitions. [2023-08-30 04:36:50,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 212 transitions, 926 flow [2023-08-30 04:36:50,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 212 transitions, 925 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:36:50,859 INFO L231 Difference]: Finished difference. Result has 76 places, 94 transitions, 385 flow [2023-08-30 04:36:50,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=76, PETRI_TRANSITIONS=94} [2023-08-30 04:36:50,860 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-08-30 04:36:50,861 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 94 transitions, 385 flow [2023-08-30 04:36:50,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states 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 04:36:50,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:50,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:36:50,875 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 04:36:51,075 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 04:36:51,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:36:51,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:51,076 INFO L85 PathProgramCache]: Analyzing trace with hash 38693201, now seen corresponding path program 1 times [2023-08-30 04:36:51,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:51,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51158119] [2023-08-30 04:36:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:36:51,077 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 04:36:51,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:51,081 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 04:36:51,084 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 04:36:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:36:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:36:51,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:51,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:51,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:51,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:51,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:51,309 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 04:36:51,309 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 04:36:51,336 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 04:36:51,337 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 04:36:51,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:51,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:36:51,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:51,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:36:51,452 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 04:36:51,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:36:51,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:51,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51158119] [2023-08-30 04:36:51,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51158119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:36:51,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:36:51,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:36:51,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803893065] [2023-08-30 04:36:51,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:36:51,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:36:51,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:51,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:36:51,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:36:51,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-08-30 04:36:51,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 94 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states 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 04:36:51,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:51,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-08-30 04:36:51,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:53,369 INFO L130 PetriNetUnfolder]: 10422/14382 cut-off events. [2023-08-30 04:36:53,370 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2023-08-30 04:36:53,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29043 conditions, 14382 events. 10422/14382 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 76198 event pairs, 7854 based on Foata normal form. 0/4100 useless extension candidates. Maximal degree in co-relation 29030. Up to 14382 conditions per place. [2023-08-30 04:36:53,438 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 89 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-08-30 04:36:53,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 545 flow [2023-08-30 04:36:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:36:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:36:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 959 transitions. [2023-08-30 04:36:53,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442139234670355 [2023-08-30 04:36:53,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 959 transitions. [2023-08-30 04:36:53,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 959 transitions. [2023-08-30 04:36:53,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:53,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 959 transitions. [2023-08-30 04:36:53,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 04:36:53,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:53,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:53,453 INFO L175 Difference]: Start difference. First operand has 76 places, 94 transitions, 385 flow. Second operand 3 states and 959 transitions. [2023-08-30 04:36:53,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 545 flow [2023-08-30 04:36:53,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 90 transitions, 515 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 04:36:53,456 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 337 flow [2023-08-30 04:36:53,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2023-08-30 04:36:53,457 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2023-08-30 04:36:53,457 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 337 flow [2023-08-30 04:36:53,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states 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 04:36:53,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:53,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:36:53,471 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 04:36:53,667 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 04:36:53,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:36:53,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:53,668 INFO L85 PathProgramCache]: Analyzing trace with hash 38693203, now seen corresponding path program 1 times [2023-08-30 04:36:53,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:53,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045729999] [2023-08-30 04:36:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:36:53,669 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 04:36:53,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:53,673 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 04:36:53,676 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 04:36:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:36:53,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 04:36:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:53,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:53,858 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 04:36:53,858 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 04:36:53,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:53,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:36:53,977 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:36:53,978 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 04:36:53,987 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 04:36:53,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:36:53,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:53,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045729999] [2023-08-30 04:36:53,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045729999] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:36:53,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:36:53,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:36:53,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894023049] [2023-08-30 04:36:53,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:36:53,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:36:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:53,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:36:53,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:36:54,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-08-30 04:36:54,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states 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 04:36:54,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:54,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-08-30 04:36:54,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:55,571 INFO L130 PetriNetUnfolder]: 7522/10597 cut-off events. [2023-08-30 04:36:55,571 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-08-30 04:36:55,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21447 conditions, 10597 events. 7522/10597 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 55265 event pairs, 5607 based on Foata normal form. 0/3449 useless extension candidates. Maximal degree in co-relation 21433. Up to 10597 conditions per place. [2023-08-30 04:36:55,626 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 85 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-08-30 04:36:55,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 489 flow [2023-08-30 04:36:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:36:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:36:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 957 transitions. [2023-08-30 04:36:55,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412171507607192 [2023-08-30 04:36:55,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 957 transitions. [2023-08-30 04:36:55,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 957 transitions. [2023-08-30 04:36:55,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:55,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 957 transitions. [2023-08-30 04:36:55,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states 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 04:36:55,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:55,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:55,643 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 337 flow. Second operand 3 states and 957 transitions. [2023-08-30 04:36:55,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 489 flow [2023-08-30 04:36:55,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:36:55,646 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 318 flow [2023-08-30 04:36:55,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2023-08-30 04:36:55,649 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2023-08-30 04:36:55,649 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 318 flow [2023-08-30 04:36:55,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states 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 04:36:55,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:55,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:36:55,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 04:36:55,859 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 04:36:55,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:36:55,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:55,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1470511458, now seen corresponding path program 1 times [2023-08-30 04:36:55,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:55,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268889229] [2023-08-30 04:36:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:36:55,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:36:55,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:55,862 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 04:36:55,863 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 04:36:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:36:55,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 04:36:55,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:55,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:56,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:56,057 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:36:56,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 04:36:56,081 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 04:36:56,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:56,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:36:56,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:56,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:36:56,195 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 04:36:56,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:36:56,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:56,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268889229] [2023-08-30 04:36:56,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268889229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:36:56,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:36:56,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:36:56,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936081755] [2023-08-30 04:36:56,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:36:56,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:36:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:36:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:36:56,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-08-30 04:36:56,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states 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 04:36:56,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:56,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-08-30 04:36:56,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:57,573 INFO L130 PetriNetUnfolder]: 7228/10156 cut-off events. [2023-08-30 04:36:57,573 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-08-30 04:36:57,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20566 conditions, 10156 events. 7228/10156 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 52631 event pairs, 5376 based on Foata normal form. 0/3386 useless extension candidates. Maximal degree in co-relation 20551. Up to 10156 conditions per place. [2023-08-30 04:36:57,612 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 83 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-30 04:36:57,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 482 flow [2023-08-30 04:36:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:36:57,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:36:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 955 transitions. [2023-08-30 04:36:57,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44029506685108344 [2023-08-30 04:36:57,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 955 transitions. [2023-08-30 04:36:57,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 955 transitions. [2023-08-30 04:36:57,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:57,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 955 transitions. [2023-08-30 04:36:57,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.3333333333333) internal successors, (955), 3 states have internal predecessors, (955), 0 states have call successors, (0), 0 states 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 04:36:57,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:57,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:57,632 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 318 flow. Second operand 3 states and 955 transitions. [2023-08-30 04:36:57,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 482 flow [2023-08-30 04:36:57,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:36:57,636 INFO L231 Difference]: Finished difference. Result has 73 places, 84 transitions, 315 flow [2023-08-30 04:36:57,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=73, PETRI_TRANSITIONS=84} [2023-08-30 04:36:57,639 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-08-30 04:36:57,639 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 84 transitions, 315 flow [2023-08-30 04:36:57,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states 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 04:36:57,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:57,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:36:57,655 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 04:36:57,849 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 04:36:57,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:36:57,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1470511459, now seen corresponding path program 1 times [2023-08-30 04:36:57,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:57,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999117637] [2023-08-30 04:36:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:36:57,851 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 04:36:57,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:57,852 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 04:36:57,853 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 04:36:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:36:57,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 04:36:57,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:57,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:58,018 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 04:36:58,019 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 04:36:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:36:58,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:36:58,138 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:36:58,139 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 04:36:58,172 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 04:36:58,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:36:58,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:58,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999117637] [2023-08-30 04:36:58,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999117637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:36:58,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:36:58,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:36:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684849478] [2023-08-30 04:36:58,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:36:58,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:36:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:36:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:36:58,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 723 [2023-08-30 04:36:58,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 84 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states 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 04:36:58,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:36:58,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 723 [2023-08-30 04:36:58,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:36:59,466 INFO L130 PetriNetUnfolder]: 6934/9715 cut-off events. [2023-08-30 04:36:59,466 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-08-30 04:36:59,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19685 conditions, 9715 events. 6934/9715 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 50007 event pairs, 5145 based on Foata normal form. 0/3323 useless extension candidates. Maximal degree in co-relation 19669. Up to 9715 conditions per place. [2023-08-30 04:36:59,492 INFO L137 encePairwiseOnDemand]: 720/723 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-30 04:36:59,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 475 flow [2023-08-30 04:36:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:36:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:36:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2023-08-30 04:36:59,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43937298294144767 [2023-08-30 04:36:59,498 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2023-08-30 04:36:59,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2023-08-30 04:36:59,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:36:59,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2023-08-30 04:36:59,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states 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 04:36:59,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:59,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 04:36:59,504 INFO L175 Difference]: Start difference. First operand has 73 places, 84 transitions, 315 flow. Second operand 3 states and 953 transitions. [2023-08-30 04:36:59,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 475 flow [2023-08-30 04:36:59,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:36:59,506 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 312 flow [2023-08-30 04:36:59,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=312, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2023-08-30 04:36:59,507 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2023-08-30 04:36:59,507 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 312 flow [2023-08-30 04:36:59,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states 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 04:36:59,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:36:59,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:36:59,518 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 04:36:59,717 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 04:36:59,718 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:36:59,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:36:59,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1470511528, now seen corresponding path program 1 times [2023-08-30 04:36:59,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:36:59,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040563870] [2023-08-30 04:36:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:36:59,719 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 04:36:59,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:36:59,721 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 04:36:59,723 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 04:36:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:36:59,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:36:59,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:36:59,869 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 04:36:59,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:36:59,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:36:59,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040563870] [2023-08-30 04:36:59,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040563870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:36:59,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:36:59,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:36:59,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160681678] [2023-08-30 04:36:59,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:36:59,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:36:59,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:36:59,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:36:59,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:37:00,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 723 [2023-08-30 04:37:00,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 290.5) internal successors, (1162), 4 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states 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 04:37:00,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:37:00,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 723 [2023-08-30 04:37:00,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:37:01,578 INFO L130 PetriNetUnfolder]: 8918/12752 cut-off events. [2023-08-30 04:37:01,578 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-08-30 04:37:01,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25858 conditions, 12752 events. 8918/12752 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 70827 event pairs, 6720 based on Foata normal form. 0/4733 useless extension candidates. Maximal degree in co-relation 25841. Up to 9714 conditions per place. [2023-08-30 04:37:01,612 INFO L137 encePairwiseOnDemand]: 711/723 looper letters, 138 selfloop transitions, 3 changer transitions 0/141 dead transitions. [2023-08-30 04:37:01,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 141 transitions, 804 flow [2023-08-30 04:37:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:37:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:37:01,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1272 transitions. [2023-08-30 04:37:01,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43983402489626555 [2023-08-30 04:37:01,619 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1272 transitions. [2023-08-30 04:37:01,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1272 transitions. [2023-08-30 04:37:01,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:37:01,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1272 transitions. [2023-08-30 04:37:01,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 04:37:01,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states 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 04:37:01,626 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states 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 04:37:01,626 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 312 flow. Second operand 4 states and 1272 transitions. [2023-08-30 04:37:01,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 141 transitions, 804 flow [2023-08-30 04:37:01,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 141 transitions, 803 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:37:01,630 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 336 flow [2023-08-30 04:37:01,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2023-08-30 04:37:01,630 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2023-08-30 04:37:01,631 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 336 flow [2023-08-30 04:37:01,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.5) internal successors, (1162), 4 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states 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 04:37:01,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:37:01,631 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 04:37:01,642 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 04:37:01,840 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 04:37:01,841 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:37:01,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:37:01,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1516971120, now seen corresponding path program 2 times [2023-08-30 04:37:01,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:37:01,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149842709] [2023-08-30 04:37:01,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:37:01,842 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 04:37:01,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:37:01,843 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 04:37:01,845 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 04:37:01,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:37:01,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:37:01,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:37:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:37:02,058 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 04:37:02,058 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 04:37:02,194 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 04:37:02,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:37:02,803 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 04:37:02,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:37:02,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149842709] [2023-08-30 04:37:02,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149842709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:37:02,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:37:02,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:37:02,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351369130] [2023-08-30 04:37:02,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:37:02,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:37:02,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:37:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:37:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:37:10,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 723 [2023-08-30 04:37:10,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 336 flow. Second operand has 12 states, 12 states have (on average 279.0) internal successors, (3348), 12 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states 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 04:37:10,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:37:10,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 723 [2023-08-30 04:37:10,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:37:12,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:37:15,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:37:16,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:37:19,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:37:20,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:37:23,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:37:25,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:37:27,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:37:30,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:37:32,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:37:41,584 INFO L130 PetriNetUnfolder]: 29696/42436 cut-off events. [2023-08-30 04:37:41,584 INFO L131 PetriNetUnfolder]: For 1941/1941 co-relation queries the response was YES. [2023-08-30 04:37:41,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91608 conditions, 42436 events. 29696/42436 cut-off events. For 1941/1941 co-relation queries the response was YES. Maximal size of possible extension queue 1362. Compared 261840 event pairs, 22400 based on Foata normal form. 30/16875 useless extension candidates. Maximal degree in co-relation 91589. Up to 5741 conditions per place. [2023-08-30 04:37:41,792 INFO L137 encePairwiseOnDemand]: 713/723 looper letters, 518 selfloop transitions, 52 changer transitions 0/570 dead transitions. [2023-08-30 04:37:41,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 570 transitions, 2820 flow [2023-08-30 04:37:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:37:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:37:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3924 transitions. [2023-08-30 04:37:41,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45228215767634855 [2023-08-30 04:37:41,803 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3924 transitions. [2023-08-30 04:37:41,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3924 transitions. [2023-08-30 04:37:41,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:37:41,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3924 transitions. [2023-08-30 04:37:41,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states 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 04:37:41,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 723.0) internal successors, (9399), 13 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states 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 04:37:41,823 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 723.0) internal successors, (9399), 13 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states 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 04:37:41,823 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 336 flow. Second operand 12 states and 3924 transitions. [2023-08-30 04:37:41,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 570 transitions, 2820 flow [2023-08-30 04:37:41,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 570 transitions, 2814 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 04:37:41,834 INFO L231 Difference]: Finished difference. Result has 92 places, 113 transitions, 720 flow [2023-08-30 04:37:41,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=720, PETRI_PLACES=92, PETRI_TRANSITIONS=113} [2023-08-30 04:37:41,835 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2023-08-30 04:37:41,835 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 113 transitions, 720 flow [2023-08-30 04:37:41,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 279.0) internal successors, (3348), 12 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states 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 04:37:41,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:37:41,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:37:41,848 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 04:37:42,045 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 04:37:42,046 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:37:42,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:37:42,046 INFO L85 PathProgramCache]: Analyzing trace with hash 264999124, now seen corresponding path program 1 times [2023-08-30 04:37:42,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:37:42,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041799990] [2023-08-30 04:37:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:37:42,047 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 04:37:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:37:42,048 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 04:37:42,051 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 04:37:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:37:42,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:37:42,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:37:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:37:42,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:37:42,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:37:42,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041799990] [2023-08-30 04:37:42,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041799990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:37:42,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:37:42,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:37:42,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045057995] [2023-08-30 04:37:42,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:37:42,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:37:42,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:37:42,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:37:42,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:37:42,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 723 [2023-08-30 04:37:42,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 113 transitions, 720 flow. Second operand has 5 states, 5 states have (on average 289.4) internal successors, (1447), 5 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states 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 04:37:42,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:37:42,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 723 [2023-08-30 04:37:42,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:37:51,051 INFO L130 PetriNetUnfolder]: 65938/94842 cut-off events. [2023-08-30 04:37:51,052 INFO L131 PetriNetUnfolder]: For 3912/3912 co-relation queries the response was YES. [2023-08-30 04:37:51,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203405 conditions, 94842 events. 65938/94842 cut-off events. For 3912/3912 co-relation queries the response was YES. Maximal size of possible extension queue 2819. Compared 675670 event pairs, 32900 based on Foata normal form. 1150/39429 useless extension candidates. Maximal degree in co-relation 203378. Up to 41283 conditions per place. [2023-08-30 04:37:51,571 INFO L137 encePairwiseOnDemand]: 709/723 looper letters, 202 selfloop transitions, 15 changer transitions 0/217 dead transitions. [2023-08-30 04:37:51,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 217 transitions, 1512 flow [2023-08-30 04:37:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:37:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:37:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1602 transitions. [2023-08-30 04:37:51,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44315352697095434 [2023-08-30 04:37:51,576 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1602 transitions. [2023-08-30 04:37:51,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1602 transitions. [2023-08-30 04:37:51,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:37:51,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1602 transitions. [2023-08-30 04:37:51,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.4) internal successors, (1602), 5 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states 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 04:37:51,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states 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 04:37:51,583 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states 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 04:37:51,584 INFO L175 Difference]: Start difference. First operand has 92 places, 113 transitions, 720 flow. Second operand 5 states and 1602 transitions. [2023-08-30 04:37:51,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 217 transitions, 1512 flow [2023-08-30 04:37:51,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 217 transitions, 1395 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-08-30 04:37:51,604 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 694 flow [2023-08-30 04:37:51,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=694, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2023-08-30 04:37:51,605 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2023-08-30 04:37:51,605 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 694 flow [2023-08-30 04:37:51,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.4) internal successors, (1447), 5 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states 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 04:37:51,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:37:51,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:37:51,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-08-30 04:37:51,815 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 04:37:51,815 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:37:51,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:37:51,816 INFO L85 PathProgramCache]: Analyzing trace with hash -437028230, now seen corresponding path program 1 times [2023-08-30 04:37:51,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:37:51,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698753145] [2023-08-30 04:37:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:37:51,816 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 04:37:51,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:37:51,818 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 04:37:51,818 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 04:37:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:37:51,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:37:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:37:51,980 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 04:37:52,000 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:37:52,001 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 04:37:52,015 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 04:37:52,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:37:52,015 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:37:52,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698753145] [2023-08-30 04:37:52,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698753145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:37:52,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:37:52,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:37:52,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564974875] [2023-08-30 04:37:52,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:37:52,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:37:52,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:37:52,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:37:52,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:37:52,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 723 [2023-08-30 04:37:52,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 694 flow. Second operand has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 04:37:52,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:37:52,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 723 [2023-08-30 04:37:52,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:37:59,522 INFO L130 PetriNetUnfolder]: 52378/75452 cut-off events. [2023-08-30 04:37:59,522 INFO L131 PetriNetUnfolder]: For 8838/8838 co-relation queries the response was YES. [2023-08-30 04:37:59,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171442 conditions, 75452 events. 52378/75452 cut-off events. For 8838/8838 co-relation queries the response was YES. Maximal size of possible extension queue 2329. Compared 516003 event pairs, 39480 based on Foata normal form. 0/34222 useless extension candidates. Maximal degree in co-relation 171412. Up to 75404 conditions per place. [2023-08-30 04:37:59,945 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 98 selfloop transitions, 12 changer transitions 0/110 dead transitions. [2023-08-30 04:37:59,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 898 flow [2023-08-30 04:37:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:37:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:37:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1180 transitions. [2023-08-30 04:37:59,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40802213001383125 [2023-08-30 04:37:59,949 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1180 transitions. [2023-08-30 04:37:59,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1180 transitions. [2023-08-30 04:37:59,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:37:59,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1180 transitions. [2023-08-30 04:37:59,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states 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 04:37:59,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states 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 04:37:59,956 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states 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 04:37:59,956 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 694 flow. Second operand 4 states and 1180 transitions. [2023-08-30 04:37:59,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 898 flow [2023-08-30 04:37:59,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 892 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 04:37:59,969 INFO L231 Difference]: Finished difference. Result has 92 places, 110 transitions, 696 flow [2023-08-30 04:37:59,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=696, PETRI_PLACES=92, PETRI_TRANSITIONS=110} [2023-08-30 04:37:59,970 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2023-08-30 04:37:59,970 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 110 transitions, 696 flow [2023-08-30 04:37:59,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 04:37:59,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:37:59,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:37:59,987 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 04:38:00,181 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 04:38:00,182 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:38:00,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:38:00,182 INFO L85 PathProgramCache]: Analyzing trace with hash -437028231, now seen corresponding path program 1 times [2023-08-30 04:38:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:38:00,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415250202] [2023-08-30 04:38:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:38:00,183 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 04:38:00,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:38:00,184 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 04:38:00,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 04:38:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:38:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:38:00,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:38:00,357 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 04:38:00,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 04:38:00,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:38:00,433 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 04:38:00,441 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:38:00,441 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 04:38:00,488 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 04:38:00,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:38:04,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 04:38:04,845 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 55 treesize of output 62 [2023-08-30 04:38:04,992 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 04:38:04,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:38:04,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415250202] [2023-08-30 04:38:04,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415250202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:38:04,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:38:04,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 04:38:04,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391710000] [2023-08-30 04:38:04,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:38:04,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:38:04,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:38:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:38:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:38:09,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 723 [2023-08-30 04:38:09,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 110 transitions, 696 flow. Second operand has 10 states, 10 states have (on average 262.6) internal successors, (2626), 10 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states 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 04:38:09,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:38:09,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 723 [2023-08-30 04:38:09,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:38:38,092 INFO L130 PetriNetUnfolder]: 99424/143497 cut-off events. [2023-08-30 04:38:38,092 INFO L131 PetriNetUnfolder]: For 16651/16651 co-relation queries the response was YES. [2023-08-30 04:38:38,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322686 conditions, 143497 events. 99424/143497 cut-off events. For 16651/16651 co-relation queries the response was YES. Maximal size of possible extension queue 4278. Compared 1066088 event pairs, 63490 based on Foata normal form. 0/65888 useless extension candidates. Maximal degree in co-relation 322655. Up to 29326 conditions per place. [2023-08-30 04:38:39,053 INFO L137 encePairwiseOnDemand]: 709/723 looper letters, 727 selfloop transitions, 74 changer transitions 0/801 dead transitions. [2023-08-30 04:38:39,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 801 transitions, 4324 flow [2023-08-30 04:38:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 04:38:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 04:38:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 6777 transitions. [2023-08-30 04:38:39,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40754104275663 [2023-08-30 04:38:39,064 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 6777 transitions. [2023-08-30 04:38:39,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 6777 transitions. [2023-08-30 04:38:39,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:38:39,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 6777 transitions. [2023-08-30 04:38:39,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 294.6521739130435) internal successors, (6777), 23 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states 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 04:38:39,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 723.0) internal successors, (17352), 24 states have internal predecessors, (17352), 0 states have call successors, (0), 0 states 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 04:38:39,092 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 723.0) internal successors, (17352), 24 states have internal predecessors, (17352), 0 states have call successors, (0), 0 states 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 04:38:39,093 INFO L175 Difference]: Start difference. First operand has 92 places, 110 transitions, 696 flow. Second operand 23 states and 6777 transitions. [2023-08-30 04:38:39,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 801 transitions, 4324 flow [2023-08-30 04:38:39,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 801 transitions, 4311 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:38:39,132 INFO L231 Difference]: Finished difference. Result has 128 places, 144 transitions, 1177 flow [2023-08-30 04:38:39,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1177, PETRI_PLACES=128, PETRI_TRANSITIONS=144} [2023-08-30 04:38:39,133 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 54 predicate places. [2023-08-30 04:38:39,133 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 144 transitions, 1177 flow [2023-08-30 04:38:39,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 262.6) internal successors, (2626), 10 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states 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 04:38:39,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:38:39,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:38:39,148 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 04:38:39,344 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 04:38:39,345 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:38:39,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:38:39,345 INFO L85 PathProgramCache]: Analyzing trace with hash -437028329, now seen corresponding path program 1 times [2023-08-30 04:38:39,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:38:39,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581934488] [2023-08-30 04:38:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:38:39,346 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 04:38:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:38:39,347 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 04:38:39,350 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 04:38:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:38:39,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 04:38:39,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:38:39,557 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 04:38:39,557 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 04:38:39,584 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 04:38:39,584 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 04:38:39,602 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:38:39,602 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 04:38:39,612 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 04:38:39,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:38:39,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:38:39,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581934488] [2023-08-30 04:38:39,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581934488] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:38:39,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:38:39,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:38:39,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137276458] [2023-08-30 04:38:39,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:38:39,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:38:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:38:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:38:39,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:38:39,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 723 [2023-08-30 04:38:39,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 144 transitions, 1177 flow. Second operand has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 04:38:39,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:38:39,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 723 [2023-08-30 04:38:39,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:38:52,544 INFO L130 PetriNetUnfolder]: 77046/111763 cut-off events. [2023-08-30 04:38:52,544 INFO L131 PetriNetUnfolder]: For 146598/146598 co-relation queries the response was YES. [2023-08-30 04:38:53,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282813 conditions, 111763 events. 77046/111763 cut-off events. For 146598/146598 co-relation queries the response was YES. Maximal size of possible extension queue 3299. Compared 811207 event pairs, 56332 based on Foata normal form. 0/56497 useless extension candidates. Maximal degree in co-relation 282766. Up to 111750 conditions per place. [2023-08-30 04:38:53,650 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 128 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2023-08-30 04:38:53,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 140 transitions, 1441 flow [2023-08-30 04:38:53,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:38:53,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:38:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1176 transitions. [2023-08-30 04:38:53,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066390041493776 [2023-08-30 04:38:53,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1176 transitions. [2023-08-30 04:38:53,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1176 transitions. [2023-08-30 04:38:53,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:38:53,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1176 transitions. [2023-08-30 04:38:53,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 04:38:53,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states 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 04:38:53,659 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states 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 04:38:53,659 INFO L175 Difference]: Start difference. First operand has 128 places, 144 transitions, 1177 flow. Second operand 4 states and 1176 transitions. [2023-08-30 04:38:53,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 140 transitions, 1441 flow [2023-08-30 04:38:54,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 140 transitions, 1338 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-30 04:38:54,809 INFO L231 Difference]: Finished difference. Result has 123 places, 140 transitions, 1082 flow [2023-08-30 04:38:54,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1082, PETRI_PLACES=123, PETRI_TRANSITIONS=140} [2023-08-30 04:38:54,810 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 49 predicate places. [2023-08-30 04:38:54,810 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 140 transitions, 1082 flow [2023-08-30 04:38:54,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 04:38:54,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:38:54,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:38:54,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-08-30 04:38:55,020 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 04:38:55,021 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:38:55,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:38:55,021 INFO L85 PathProgramCache]: Analyzing trace with hash -117245573, now seen corresponding path program 1 times [2023-08-30 04:38:55,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:38:55,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737247581] [2023-08-30 04:38:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:38:55,022 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 04:38:55,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:38:55,023 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 04:38:55,027 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 04:38:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:38:55,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 04:38:55,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:38:55,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 04:38:55,200 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 04:38:55,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:38:55,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:38:55,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737247581] [2023-08-30 04:38:55,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737247581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:38:55,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:38:55,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:38:55,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394288099] [2023-08-30 04:38:55,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:38:55,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:38:55,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:38:55,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:38:55,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:38:55,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 723 [2023-08-30 04:38:55,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 140 transitions, 1082 flow. Second operand has 5 states, 5 states have (on average 288.6) internal successors, (1443), 5 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states 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 04:38:55,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:38:55,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 723 [2023-08-30 04:38:55,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:39:17,833 INFO L130 PetriNetUnfolder]: 138972/201064 cut-off events. [2023-08-30 04:39:17,833 INFO L131 PetriNetUnfolder]: For 284404/284404 co-relation queries the response was YES. [2023-08-30 04:39:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505521 conditions, 201064 events. 138972/201064 cut-off events. For 284404/284404 co-relation queries the response was YES. Maximal size of possible extension queue 5585. Compared 1587493 event pairs, 45390 based on Foata normal form. 0/102284 useless extension candidates. Maximal degree in co-relation 505475. Up to 113091 conditions per place. [2023-08-30 04:39:19,715 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 173 selfloop transitions, 23 changer transitions 0/196 dead transitions. [2023-08-30 04:39:19,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 196 transitions, 1762 flow [2023-08-30 04:39:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:39:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:39:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1526 transitions. [2023-08-30 04:39:19,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42213001383125864 [2023-08-30 04:39:19,719 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1526 transitions. [2023-08-30 04:39:19,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1526 transitions. [2023-08-30 04:39:19,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:39:19,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1526 transitions. [2023-08-30 04:39:19,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.2) internal successors, (1526), 5 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states 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 04:39:19,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states 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 04:39:19,724 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states 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 04:39:19,724 INFO L175 Difference]: Start difference. First operand has 123 places, 140 transitions, 1082 flow. Second operand 5 states and 1526 transitions. [2023-08-30 04:39:19,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 196 transitions, 1762 flow [2023-08-30 04:39:21,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 196 transitions, 1749 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:39:21,547 INFO L231 Difference]: Finished difference. Result has 126 places, 141 transitions, 1134 flow [2023-08-30 04:39:21,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1134, PETRI_PLACES=126, PETRI_TRANSITIONS=141} [2023-08-30 04:39:21,547 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 52 predicate places. [2023-08-30 04:39:21,548 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 141 transitions, 1134 flow [2023-08-30 04:39:21,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 288.6) internal successors, (1443), 5 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states 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 04:39:21,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:39:21,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:39:21,556 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 04:39:21,749 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 04:39:21,749 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:39:21,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:39:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -117245571, now seen corresponding path program 1 times [2023-08-30 04:39:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:39:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767640412] [2023-08-30 04:39:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:39:21,750 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 04:39:21,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:39:21,752 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 04:39:21,753 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 04:39:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:39:21,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:39:21,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:39:21,850 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 04:39:21,862 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 04:39:21,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:39:21,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:39:21,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767640412] [2023-08-30 04:39:21,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767640412] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:39:21,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:39:21,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:39:21,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457788178] [2023-08-30 04:39:21,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:39:21,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:39:21,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:39:21,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:39:21,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:39:22,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 723 [2023-08-30 04:39:22,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 141 transitions, 1134 flow. Second operand has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 04:39:22,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:39:22,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 723 [2023-08-30 04:39:22,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:39:37,393 INFO L130 PetriNetUnfolder]: 97742/141494 cut-off events. [2023-08-30 04:39:37,394 INFO L131 PetriNetUnfolder]: For 203534/203534 co-relation queries the response was YES. [2023-08-30 04:39:38,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374152 conditions, 141494 events. 97742/141494 cut-off events. For 203534/203534 co-relation queries the response was YES. Maximal size of possible extension queue 3930. Compared 1053413 event pairs, 70440 based on Foata normal form. 0/89094 useless extension candidates. Maximal degree in co-relation 374105. Up to 141328 conditions per place. [2023-08-30 04:39:38,753 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 126 selfloop transitions, 11 changer transitions 0/137 dead transitions. [2023-08-30 04:39:38,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 1400 flow [2023-08-30 04:39:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:39:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:39:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1172 transitions. [2023-08-30 04:39:38,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40525587828492393 [2023-08-30 04:39:38,757 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1172 transitions. [2023-08-30 04:39:38,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1172 transitions. [2023-08-30 04:39:38,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:39:38,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1172 transitions. [2023-08-30 04:39:38,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states 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 04:39:38,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states 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 04:39:38,760 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states 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 04:39:38,761 INFO L175 Difference]: Start difference. First operand has 126 places, 141 transitions, 1134 flow. Second operand 4 states and 1172 transitions. [2023-08-30 04:39:38,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 1400 flow [2023-08-30 04:39:40,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1365 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:39:40,151 INFO L231 Difference]: Finished difference. Result has 122 places, 137 transitions, 1113 flow [2023-08-30 04:39:40,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1113, PETRI_PLACES=122, PETRI_TRANSITIONS=137} [2023-08-30 04:39:40,152 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 48 predicate places. [2023-08-30 04:39:40,152 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 137 transitions, 1113 flow [2023-08-30 04:39:40,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 04:39:40,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:39:40,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:39:40,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 04:39:40,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:39:40,358 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:39:40,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:39:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash -437028328, now seen corresponding path program 1 times [2023-08-30 04:39:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:39:40,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538693466] [2023-08-30 04:39:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:39:40,359 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 04:39:40,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:39:40,360 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:39:40,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 04:39:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:39:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 04:39:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:39:40,659 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 04:39:40,660 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 04:39:40,766 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 04:39:40,766 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 04:39:40,918 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 04:39:40,922 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 04:39:40,936 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 04:39:41,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:39:41,001 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 04:39:41,016 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:39:41,018 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 04:39:41,068 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 04:39:41,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:39:47,837 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 04:39:47,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:39:47,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538693466] [2023-08-30 04:39:47,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538693466] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:39:47,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:39:47,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 04:39:47,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677698018] [2023-08-30 04:39:47,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:39:47,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:39:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:39:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:39:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2023-08-30 04:39:51,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:39:53,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:39:55,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:39:58,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:40:01,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:40:03,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 04:40:05,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:40:07,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 04:40:10,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:40:13,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 04:40:15,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:40:19,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 04:40:22,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:40:25,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:40:27,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 04:40:30,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:40:32,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 04:40:34,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:40:36,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:40:39,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:40:40,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 723 [2023-08-30 04:40:40,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 137 transitions, 1113 flow. Second operand has 10 states, 10 states have (on average 229.6) internal successors, (2296), 10 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:40:40,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:40:40,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 723 [2023-08-30 04:40:40,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:41:30,418 INFO L130 PetriNetUnfolder]: 173084/249130 cut-off events. [2023-08-30 04:41:30,419 INFO L131 PetriNetUnfolder]: For 440264/440264 co-relation queries the response was YES. [2023-08-30 04:41:32,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660668 conditions, 249130 events. 173084/249130 cut-off events. For 440264/440264 co-relation queries the response was YES. Maximal size of possible extension queue 6645. Compared 1944238 event pairs, 105830 based on Foata normal form. 142/161218 useless extension candidates. Maximal degree in co-relation 660621. Up to 83601 conditions per place. [2023-08-30 04:41:33,058 INFO L137 encePairwiseOnDemand]: 707/723 looper letters, 503 selfloop transitions, 126 changer transitions 0/629 dead transitions. [2023-08-30 04:41:33,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 629 transitions, 4958 flow [2023-08-30 04:41:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 04:41:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 04:41:33,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4096 transitions. [2023-08-30 04:41:33,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35408022130013833 [2023-08-30 04:41:33,068 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4096 transitions. [2023-08-30 04:41:33,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4096 transitions. [2023-08-30 04:41:33,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:41:33,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4096 transitions. [2023-08-30 04:41:33,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 256.0) internal successors, (4096), 16 states have internal predecessors, (4096), 0 states have call successors, (0), 0 states 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 04:41:33,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 723.0) internal successors, (12291), 17 states have internal predecessors, (12291), 0 states have call successors, (0), 0 states 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 04:41:33,085 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 723.0) internal successors, (12291), 17 states have internal predecessors, (12291), 0 states have call successors, (0), 0 states 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 04:41:33,085 INFO L175 Difference]: Start difference. First operand has 122 places, 137 transitions, 1113 flow. Second operand 16 states and 4096 transitions. [2023-08-30 04:41:33,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 629 transitions, 4958 flow [2023-08-30 04:41:35,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 629 transitions, 4919 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:41:35,961 INFO L231 Difference]: Finished difference. Result has 149 places, 227 transitions, 2684 flow [2023-08-30 04:41:35,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2684, PETRI_PLACES=149, PETRI_TRANSITIONS=227} [2023-08-30 04:41:35,962 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 75 predicate places. [2023-08-30 04:41:35,962 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 227 transitions, 2684 flow [2023-08-30 04:41:35,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 229.6) internal successors, (2296), 10 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:41:35,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:41:35,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:41:35,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 04:41:36,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:41:36,173 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-08-30 04:41:36,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:41:36,174 INFO L85 PathProgramCache]: Analyzing trace with hash -117245624, now seen corresponding path program 1 times [2023-08-30 04:41:36,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:41:36,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206986972] [2023-08-30 04:41:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:41:36,175 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 04:41:36,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:41:36,176 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:41:36,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 04:41:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:41:36,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:41:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:41:36,396 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 04:41:36,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:41:36,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:41:36,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206986972] [2023-08-30 04:41:36,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206986972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:41:36,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:41:36,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:41:36,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492834135] [2023-08-30 04:41:36,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:41:36,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:41:36,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:41:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:41:36,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:41:36,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 723 [2023-08-30 04:41:36,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 227 transitions, 2684 flow. Second operand has 5 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states 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 04:41:36,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:41:36,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 723 [2023-08-30 04:41:36,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand