./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/chl-chromosome-subst.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 b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:30:16,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:30:16,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:30:16,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:30:16,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:30:16,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:30:16,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:30:16,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:30:16,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:30:16,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:30:16,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:30:16,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:30:16,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:30:16,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:30:16,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:30:16,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:30:16,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:30:16,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:30:16,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:30:16,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:30:16,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:30:16,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:30:16,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:30:16,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:30:16,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:30:16,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:30:16,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:30:16,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:30:16,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:30:16,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:30:16,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:30:16,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:30:16,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:30:16,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:30:16,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:30:16,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:30:16,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:30:16,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:30:16,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:30:16,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:30:16,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:30:16,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:30:16,393 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:30:16,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:30:16,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:30:16,394 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:30:16,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:30:16,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:30:16,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:30:16,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:30:16,396 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:30:16,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:30:16,397 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:30:16,397 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:30:16,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:30:16,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:30:16,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:30:16,398 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:30:16,398 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:30:16,398 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:30:16,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:30:16,399 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:30:16,399 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:30:16,399 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:30:16,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:30:16,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:30:16,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:30:16,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:30:16,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:30:16,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:30:16,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:30:16,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:30:16,401 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:30:16,401 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:30:16,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:30:16,401 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:30:16,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:30:16,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:30:16,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:30:16,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:30:16,705 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:30:16,705 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:30:16,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-09-01 01:30:17,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:30:18,049 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:30:18,050 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-09-01 01:30:18,057 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2cb4e7b6/de5bca6ddd85447c99300671c0c4e42e/FLAG19d74d513 [2023-09-01 01:30:18,067 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2cb4e7b6/de5bca6ddd85447c99300671c0c4e42e [2023-09-01 01:30:18,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:30:18,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:30:18,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:30:18,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:30:18,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:30:18,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:30:18" (1/1) ... [2023-09-01 01:30:18,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1699ca92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:18, skipping insertion in model container [2023-09-01 01:30:18,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:30:18" (1/1) ... [2023-09-01 01:30:18,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:30:18,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:30:18,303 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/chl-chromosome-subst.wvr.c[3097,3110] [2023-09-01 01:30:18,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:30:18,331 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) [2023-09-01 01:30:18,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@706ecc57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:18, skipping insertion in model container [2023-09-01 01:30:18,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:30:18,333 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 01:30:18,334 INFO L158 Benchmark]: Toolchain (without parser) took 263.27ms. Allocated memory is still 77.6MB. Free memory was 56.1MB in the beginning and 45.5MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:30:18,335 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 56.6MB. Free memory was 34.7MB in the beginning and 34.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 01:30:18,336 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.49ms. Allocated memory is still 77.6MB. Free memory was 55.9MB in the beginning and 45.5MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 01:30:18,337 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 56.6MB. Free memory was 34.7MB in the beginning and 34.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.49ms. Allocated memory is still 77.6MB. Free memory was 55.9MB in the beginning and 45.5MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 119]: 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/chl-chromosome-subst.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 b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:30:19,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:30:19,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:30:20,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:30:20,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:30:20,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:30:20,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:30:20,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:30:20,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:30:20,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:30:20,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:30:20,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:30:20,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:30:20,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:30:20,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:30:20,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:30:20,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:30:20,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:30:20,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:30:20,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:30:20,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:30:20,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:30:20,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:30:20,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:30:20,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:30:20,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:30:20,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:30:20,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:30:20,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:30:20,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:30:20,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:30:20,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:30:20,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:30:20,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:30:20,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:30:20,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:30:20,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:30:20,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:30:20,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:30:20,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:30:20,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:30:20,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 01:30:20,128 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:30:20,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:30:20,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:30:20,130 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:30:20,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:30:20,131 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:30:20,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:30:20,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:30:20,132 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:30:20,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:30:20,133 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:30:20,133 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:30:20,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:30:20,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:30:20,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:30:20,134 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:30:20,134 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:30:20,134 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:30:20,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:30:20,134 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:30:20,135 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 01:30:20,135 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 01:30:20,135 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:30:20,135 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:30:20,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:30:20,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:30:20,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:30:20,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:30:20,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:30:20,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:30:20,137 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 01:30:20,137 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 01:30:20,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:30:20,137 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:30:20,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:30:20,138 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 01:30:20,138 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:30:20,138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:30:20,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:30:20,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:30:20,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:30:20,495 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:30:20,495 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:30:20,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-09-01 01:30:21,618 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:30:21,841 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:30:21,841 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-09-01 01:30:21,850 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7dff841a/f0d96497b4994866a22e758a678f3fb7/FLAG1f8ae5022 [2023-09-01 01:30:21,860 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7dff841a/f0d96497b4994866a22e758a678f3fb7 [2023-09-01 01:30:21,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:30:21,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:30:21,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:30:21,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:30:21,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:30:21,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:30:21" (1/1) ... [2023-09-01 01:30:21,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1296615b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:21, skipping insertion in model container [2023-09-01 01:30:21,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:30:21" (1/1) ... [2023-09-01 01:30:21,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:30:21,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:30:22,083 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/chl-chromosome-subst.wvr.c[3097,3110] [2023-09-01 01:30:22,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:30:22,120 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 01:30:22,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:30:22,162 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/chl-chromosome-subst.wvr.c[3097,3110] [2023-09-01 01:30:22,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:30:22,176 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:30:22,210 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/chl-chromosome-subst.wvr.c[3097,3110] [2023-09-01 01:30:22,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:30:22,240 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:30:22,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22 WrapperNode [2023-09-01 01:30:22,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:30:22,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:30:22,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:30:22,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:30:22,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (1/1) ... [2023-09-01 01:30:22,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (1/1) ... [2023-09-01 01:30:22,338 INFO L138 Inliner]: procedures = 28, calls = 47, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 275 [2023-09-01 01:30:22,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:30:22,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:30:22,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:30:22,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:30:22,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (1/1) ... [2023-09-01 01:30:22,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (1/1) ... [2023-09-01 01:30:22,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (1/1) ... [2023-09-01 01:30:22,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (1/1) ... [2023-09-01 01:30:22,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (1/1) ... [2023-09-01 01:30:22,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (1/1) ... [2023-09-01 01:30:22,418 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (1/1) ... [2023-09-01 01:30:22,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (1/1) ... [2023-09-01 01:30:22,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:30:22,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:30:22,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:30:22,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:30:22,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (1/1) ... [2023-09-01 01:30:22,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:30:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:30:22,458 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) [2023-09-01 01:30:22,484 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 [2023-09-01 01:30:22,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:30:22,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 01:30:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:30:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 01:30:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:30:22,499 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:30:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:30:22,499 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:30:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 01:30:22,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 01:30:22,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:30:22,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:30:22,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:30:22,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:30:22,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 01:30:22,502 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:30:22,612 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:30:22,614 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:30:23,260 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:30:23,269 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:30:23,270 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 01:30:23,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:30:23 BoogieIcfgContainer [2023-09-01 01:30:23,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:30:23,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:30:23,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:30:23,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:30:23,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:30:21" (1/3) ... [2023-09-01 01:30:23,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e96ecfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:30:23, skipping insertion in model container [2023-09-01 01:30:23,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:30:22" (2/3) ... [2023-09-01 01:30:23,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e96ecfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:30:23, skipping insertion in model container [2023-09-01 01:30:23,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:30:23" (3/3) ... [2023-09-01 01:30:23,279 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2023-09-01 01:30:23,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:30:23,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-09-01 01:30:23,293 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:30:23,479 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 01:30:23,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 352 transitions, 728 flow [2023-09-01 01:30:23,665 INFO L130 PetriNetUnfolder]: 29/349 cut-off events. [2023-09-01 01:30:23,666 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:30:23,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 349 events. 29/349 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 661 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 260. Up to 2 conditions per place. [2023-09-01 01:30:23,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 352 transitions, 728 flow [2023-09-01 01:30:23,686 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 345 transitions, 708 flow [2023-09-01 01:30:23,690 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:30:23,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 345 transitions, 708 flow [2023-09-01 01:30:23,704 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 345 transitions, 708 flow [2023-09-01 01:30:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 345 transitions, 708 flow [2023-09-01 01:30:23,781 INFO L130 PetriNetUnfolder]: 29/345 cut-off events. [2023-09-01 01:30:23,782 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:30:23,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 345 events. 29/345 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 658 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 260. Up to 2 conditions per place. [2023-09-01 01:30:23,804 INFO L119 LiptonReduction]: Number of co-enabled transitions 19008 [2023-09-01 01:30:47,192 INFO L134 LiptonReduction]: Checked pairs total: 20570 [2023-09-01 01:30:47,193 INFO L136 LiptonReduction]: Total number of compositions: 406 [2023-09-01 01:30:47,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:30:47,219 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;@5925dba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:30:47,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-09-01 01:30:47,226 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:30:47,226 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:30:47,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:30:47,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:30:47,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:30:47,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:30:47,232 INFO L85 PathProgramCache]: Analyzing trace with hash 45090, now seen corresponding path program 1 times [2023-09-01 01:30:47,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:30:47,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708748870] [2023-09-01 01:30:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:30:47,243 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 [2023-09-01 01:30:47,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:30:47,249 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) [2023-09-01 01:30:47,277 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 [2023-09-01 01:30:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:30:47,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:30:47,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:30:47,575 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:30:47,576 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 42 [2023-09-01 01:30:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:30:47,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:30:47,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:30:47,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708748870] [2023-09-01 01:30:47,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708748870] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:30:47,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:30:47,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:30:47,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338219963] [2023-09-01 01:30:47,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:30:47,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:30:47,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:30:47,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:30:47,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:30:47,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-09-01 01:30:47,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:47,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:30:47,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-09-01 01:30:47,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:30:50,254 INFO L130 PetriNetUnfolder]: 11903/16592 cut-off events. [2023-09-01 01:30:50,256 INFO L131 PetriNetUnfolder]: For 398/398 co-relation queries the response was YES. [2023-09-01 01:30:50,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33609 conditions, 16592 events. 11903/16592 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 92150 event pairs, 10226 based on Foata normal form. 0/5881 useless extension candidates. Maximal degree in co-relation 15248. Up to 8299 conditions per place. [2023-09-01 01:30:50,373 INFO L137 encePairwiseOnDemand]: 748/758 looper letters, 110 selfloop transitions, 6 changer transitions 0/116 dead transitions. [2023-09-01 01:30:50,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 116 transitions, 500 flow [2023-09-01 01:30:50,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:30:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:30:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1033 transitions. [2023-09-01 01:30:50,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542656112576957 [2023-09-01 01:30:50,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1033 transitions. [2023-09-01 01:30:50,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1033 transitions. [2023-09-01 01:30:50,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:30:50,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1033 transitions. [2023-09-01 01:30:50,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:50,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:50,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:50,421 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 140 flow. Second operand 3 states and 1033 transitions. [2023-09-01 01:30:50,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 116 transitions, 500 flow [2023-09-01 01:30:50,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 116 transitions, 476 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:30:50,441 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 176 flow [2023-09-01 01:30:50,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-09-01 01:30:50,446 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-09-01 01:30:50,447 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 176 flow [2023-09-01 01:30:50,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:50,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:30:50,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:30:50,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 01:30:50,667 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 [2023-09-01 01:30:50,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:30:50,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:30:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash 45091, now seen corresponding path program 1 times [2023-09-01 01:30:50,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:30:50,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705339270] [2023-09-01 01:30:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:30:50,672 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 [2023-09-01 01:30:50,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:30:50,673 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) [2023-09-01 01:30:50,676 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 (3)] Waiting until timeout for monitored process [2023-09-01 01:30:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:30:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:30:50,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:30:50,809 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:30:50,809 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 [2023-09-01 01:30:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:30:50,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:30:50,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:30:50,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705339270] [2023-09-01 01:30:50,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705339270] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:30:50,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:30:50,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:30:50,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305311161] [2023-09-01 01:30:50,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:30:50,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:30:50,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:30:50,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:30:50,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:30:50,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 758 [2023-09-01 01:30:50,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 307.6666666666667) internal successors, (923), 3 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:50,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:30:50,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 758 [2023-09-01 01:30:50,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:30:52,837 INFO L130 PetriNetUnfolder]: 11903/16586 cut-off events. [2023-09-01 01:30:52,837 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-09-01 01:30:52,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33342 conditions, 16586 events. 11903/16586 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 92052 event pairs, 10226 based on Foata normal form. 4/5891 useless extension candidates. Maximal degree in co-relation 16651. Up to 16586 conditions per place. [2023-09-01 01:30:52,906 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 61 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-09-01 01:30:52,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 294 flow [2023-09-01 01:30:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:30:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:30:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2023-09-01 01:30:52,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4313984168865435 [2023-09-01 01:30:52,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2023-09-01 01:30:52,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2023-09-01 01:30:52,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:30:52,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2023-09-01 01:30:52,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:52,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:52,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:52,919 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 176 flow. Second operand 3 states and 981 transitions. [2023-09-01 01:30:52,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 294 flow [2023-09-01 01:30:52,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:30:52,922 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 160 flow [2023-09-01 01:30:52,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2023-09-01 01:30:52,923 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-09-01 01:30:52,924 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 160 flow [2023-09-01 01:30:52,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 307.6666666666667) internal successors, (923), 3 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:52,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:30:52,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:30:52,939 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 [2023-09-01 01:30:53,139 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 [2023-09-01 01:30:53,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:30:53,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:30:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1402859, now seen corresponding path program 1 times [2023-09-01 01:30:53,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:30:53,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440733558] [2023-09-01 01:30:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:30:53,147 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 [2023-09-01 01:30:53,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:30:53,148 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) [2023-09-01 01:30:53,151 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 [2023-09-01 01:30:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:30:53,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 01:30:53,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:30:53,315 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:30:53,315 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 42 [2023-09-01 01:30:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:30:53,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:30:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:30:53,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:30:53,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440733558] [2023-09-01 01:30:53,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440733558] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:30:53,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:30:53,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 01:30:53,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476835939] [2023-09-01 01:30:53,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:30:53,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:30:53,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:30:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:30:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:30:54,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 758 [2023-09-01 01:30:54,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:30:54,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:30:54,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 758 [2023-09-01 01:30:54,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:00,191 INFO L130 PetriNetUnfolder]: 29756/41459 cut-off events. [2023-09-01 01:31:00,191 INFO L131 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2023-09-01 01:31:00,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83317 conditions, 41459 events. 29756/41459 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 2429. Compared 256637 event pairs, 25565 based on Foata normal form. 0/14706 useless extension candidates. Maximal degree in co-relation 83309. Up to 8297 conditions per place. [2023-09-01 01:31:00,380 INFO L137 encePairwiseOnDemand]: 749/758 looper letters, 248 selfloop transitions, 21 changer transitions 0/269 dead transitions. [2023-09-01 01:31:00,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 269 transitions, 1166 flow [2023-09-01 01:31:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:31:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:31:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2066 transitions. [2023-09-01 01:31:00,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542656112576957 [2023-09-01 01:31:00,387 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2066 transitions. [2023-09-01 01:31:00,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2066 transitions. [2023-09-01 01:31:00,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:00,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2066 transitions. [2023-09-01 01:31:00,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 344.3333333333333) internal successors, (2066), 6 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:00,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:00,400 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:00,401 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 160 flow. Second operand 6 states and 2066 transitions. [2023-09-01 01:31:00,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 269 transitions, 1166 flow [2023-09-01 01:31:00,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 269 transitions, 1165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:00,405 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 309 flow [2023-09-01 01:31:00,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2023-09-01 01:31:00,406 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-09-01 01:31:00,406 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 309 flow [2023-09-01 01:31:00,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:00,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:00,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 01:31:00,417 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 [2023-09-01 01:31:00,616 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 [2023-09-01 01:31:00,617 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:00,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash 43552649, now seen corresponding path program 1 times [2023-09-01 01:31:00,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:00,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282100808] [2023-09-01 01:31:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:00,618 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 [2023-09-01 01:31:00,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:00,619 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) [2023-09-01 01:31:00,620 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 [2023-09-01 01:31:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:00,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 01:31:00,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:31:00,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:00,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:00,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282100808] [2023-09-01 01:31:00,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282100808] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:00,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:00,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:31:00,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501616230] [2023-09-01 01:31:00,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:00,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:31:00,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:00,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:31:00,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:31:00,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 758 [2023-09-01 01:31:00,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:00,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:00,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 758 [2023-09-01 01:31:00,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:03,073 INFO L130 PetriNetUnfolder]: 23805/33171 cut-off events. [2023-09-01 01:31:03,073 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-09-01 01:31:03,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66717 conditions, 33171 events. 23805/33171 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 200914 event pairs, 20452 based on Foata normal form. 3/11778 useless extension candidates. Maximal degree in co-relation 66705. Up to 33163 conditions per place. [2023-09-01 01:31:03,234 INFO L137 encePairwiseOnDemand]: 749/758 looper letters, 63 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2023-09-01 01:31:03,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 451 flow [2023-09-01 01:31:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 995 transitions. [2023-09-01 01:31:03,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43755496921723835 [2023-09-01 01:31:03,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 995 transitions. [2023-09-01 01:31:03,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 995 transitions. [2023-09-01 01:31:03,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:03,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 995 transitions. [2023-09-01 01:31:03,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:03,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:03,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:03,247 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 309 flow. Second operand 3 states and 995 transitions. [2023-09-01 01:31:03,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 451 flow [2023-09-01 01:31:03,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 421 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:03,253 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 313 flow [2023-09-01 01:31:03,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2023-09-01 01:31:03,256 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-09-01 01:31:03,256 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 313 flow [2023-09-01 01:31:03,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:03,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:03,257 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:31:03,273 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 [2023-09-01 01:31:03,466 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 [2023-09-01 01:31:03,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:03,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:03,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1152066974, now seen corresponding path program 2 times [2023-09-01 01:31:03,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:03,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201780677] [2023-09-01 01:31:03,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:31:03,467 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 [2023-09-01 01:31:03,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:03,468 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) [2023-09-01 01:31:03,469 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 [2023-09-01 01:31:03,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:31:03,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:31:03,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:31:03,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:03,653 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:31:03,653 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 42 [2023-09-01 01:31:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:31:03,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:31:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:31:04,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:04,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201780677] [2023-09-01 01:31:04,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201780677] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:31:04,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:31:04,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:31:04,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650964449] [2023-09-01 01:31:04,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:31:04,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:31:04,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:04,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:31:04,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:31:07,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 758 [2023-09-01 01:31:07,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 313 flow. Second operand has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:07,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:07,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 758 [2023-09-01 01:31:07,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:12,085 INFO L130 PetriNetUnfolder]: 29756/41462 cut-off events. [2023-09-01 01:31:12,085 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-09-01 01:31:12,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83396 conditions, 41462 events. 29756/41462 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 1940. Compared 251523 event pairs, 25565 based on Foata normal form. 3/14725 useless extension candidates. Maximal degree in co-relation 83382. Up to 8296 conditions per place. [2023-09-01 01:31:12,300 INFO L137 encePairwiseOnDemand]: 749/758 looper letters, 246 selfloop transitions, 26 changer transitions 0/272 dead transitions. [2023-09-01 01:31:12,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 272 transitions, 1323 flow [2023-09-01 01:31:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:31:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:31:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2361 transitions. [2023-09-01 01:31:12,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44496796079909534 [2023-09-01 01:31:12,308 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2361 transitions. [2023-09-01 01:31:12,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2361 transitions. [2023-09-01 01:31:12,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:12,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2361 transitions. [2023-09-01 01:31:12,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 337.2857142857143) internal successors, (2361), 7 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:12,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:12,321 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:12,322 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 313 flow. Second operand 7 states and 2361 transitions. [2023-09-01 01:31:12,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 272 transitions, 1323 flow [2023-09-01 01:31:12,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 272 transitions, 1295 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:31:12,327 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 391 flow [2023-09-01 01:31:12,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2023-09-01 01:31:12,327 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 8 predicate places. [2023-09-01 01:31:12,328 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 391 flow [2023-09-01 01:31:12,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:12,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:12,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:12,340 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 (6)] Ended with exit code 0 [2023-09-01 01:31:12,538 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 [2023-09-01 01:31:12,538 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:12,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:12,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1300315920, now seen corresponding path program 1 times [2023-09-01 01:31:12,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:12,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697748691] [2023-09-01 01:31:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:12,540 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 [2023-09-01 01:31:12,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:12,541 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) [2023-09-01 01:31:12,542 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 [2023-09-01 01:31:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:12,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:31:12,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:31:12,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:31:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:31:12,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:12,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697748691] [2023-09-01 01:31:12,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697748691] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:31:12,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:31:12,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-09-01 01:31:12,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798683438] [2023-09-01 01:31:12,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:31:12,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:31:12,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:12,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:31:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:31:12,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-09-01 01:31:12,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 391 flow. Second operand has 6 states, 6 states have (on average 305.6666666666667) internal successors, (1834), 6 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:12,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:12,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-09-01 01:31:12,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:14,343 INFO L130 PetriNetUnfolder]: 11903/16598 cut-off events. [2023-09-01 01:31:14,344 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-09-01 01:31:14,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33446 conditions, 16598 events. 11903/16598 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 92109 event pairs, 10226 based on Foata normal form. 9/5911 useless extension candidates. Maximal degree in co-relation 33431. Up to 16582 conditions per place. [2023-09-01 01:31:14,415 INFO L137 encePairwiseOnDemand]: 746/758 looper letters, 54 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2023-09-01 01:31:14,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 485 flow [2023-09-01 01:31:14,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:31:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:31:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1908 transitions. [2023-09-01 01:31:14,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41952506596306066 [2023-09-01 01:31:14,422 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1908 transitions. [2023-09-01 01:31:14,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1908 transitions. [2023-09-01 01:31:14,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:14,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1908 transitions. [2023-09-01 01:31:14,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:14,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:14,434 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:14,434 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 391 flow. Second operand 6 states and 1908 transitions. [2023-09-01 01:31:14,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 485 flow [2023-09-01 01:31:14,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 447 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 01:31:14,437 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 378 flow [2023-09-01 01:31:14,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2023-09-01 01:31:14,438 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-09-01 01:31:14,438 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 378 flow [2023-09-01 01:31:14,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 305.6666666666667) internal successors, (1834), 6 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:14,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:14,439 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1] [2023-09-01 01:31:14,449 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 [2023-09-01 01:31:14,648 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 [2023-09-01 01:31:14,648 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:14,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:14,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1354332757, now seen corresponding path program 3 times [2023-09-01 01:31:14,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:14,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591608357] [2023-09-01 01:31:14,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:31:14,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:31:14,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:14,650 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) [2023-09-01 01:31:14,653 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 [2023-09-01 01:31:14,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 01:31:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:31:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:31:14,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:31:14,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:31:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:31:15,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:15,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591608357] [2023-09-01 01:31:15,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591608357] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:31:15,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:31:15,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 01:31:15,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932571102] [2023-09-01 01:31:15,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:31:15,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:31:15,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:31:15,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:31:16,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-09-01 01:31:16,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 378 flow. Second operand has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:16,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:16,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-09-01 01:31:16,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:17,364 INFO L130 PetriNetUnfolder]: 5949/8304 cut-off events. [2023-09-01 01:31:17,364 INFO L131 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2023-09-01 01:31:17,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16771 conditions, 8304 events. 5949/8304 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 41414 event pairs, 5113 based on Foata normal form. 9/2965 useless extension candidates. Maximal degree in co-relation 16752. Up to 8289 conditions per place. [2023-09-01 01:31:17,405 INFO L137 encePairwiseOnDemand]: 746/758 looper letters, 48 selfloop transitions, 18 changer transitions 0/66 dead transitions. [2023-09-01 01:31:17,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 66 transitions, 421 flow [2023-09-01 01:31:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:31:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:31:17,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2509 transitions. [2023-09-01 01:31:17,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137532981530343 [2023-09-01 01:31:17,413 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2509 transitions. [2023-09-01 01:31:17,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2509 transitions. [2023-09-01 01:31:17,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:17,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2509 transitions. [2023-09-01 01:31:17,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 313.625) internal successors, (2509), 8 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:17,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:17,427 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:17,427 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 378 flow. Second operand 8 states and 2509 transitions. [2023-09-01 01:31:17,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 66 transitions, 421 flow [2023-09-01 01:31:17,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 355 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-09-01 01:31:17,429 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 271 flow [2023-09-01 01:31:17,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=271, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2023-09-01 01:31:17,430 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-09-01 01:31:17,430 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 271 flow [2023-09-01 01:31:17,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:17,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:17,432 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-09-01 01:31:17,444 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 [2023-09-01 01:31:17,641 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 [2023-09-01 01:31:17,642 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:17,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash 488945264, now seen corresponding path program 2 times [2023-09-01 01:31:17,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:17,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379625849] [2023-09-01 01:31:17,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:31:17,643 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 [2023-09-01 01:31:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:17,644 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) [2023-09-01 01:31:17,646 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 [2023-09-01 01:31:17,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:31:17,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:31:17,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:31:17,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:17,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:17,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:17,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:17,847 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:31:17,847 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 [2023-09-01 01:31:17,876 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 01:31:17,876 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 44 treesize of output 45 [2023-09-01 01:31:18,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:18,002 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 [2023-09-01 01:31:18,130 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:31:18,130 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 12 treesize of output 18 [2023-09-01 01:31:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:18,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:18,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:18,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379625849] [2023-09-01 01:31:18,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379625849] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:18,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:18,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:31:18,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923164753] [2023-09-01 01:31:18,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:18,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:31:18,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:31:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:31:18,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-09-01 01:31:18,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:18,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:18,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-09-01 01:31:18,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:19,425 INFO L130 PetriNetUnfolder]: 4605/6511 cut-off events. [2023-09-01 01:31:19,425 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-09-01 01:31:19,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13166 conditions, 6511 events. 4605/6511 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 31737 event pairs, 3945 based on Foata normal form. 0/2492 useless extension candidates. Maximal degree in co-relation 13152. Up to 6511 conditions per place. [2023-09-01 01:31:19,443 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-09-01 01:31:19,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 385 flow [2023-09-01 01:31:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 990 transitions. [2023-09-01 01:31:19,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43535620052770446 [2023-09-01 01:31:19,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 990 transitions. [2023-09-01 01:31:19,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 990 transitions. [2023-09-01 01:31:19,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:19,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 990 transitions. [2023-09-01 01:31:19,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:19,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:19,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:19,452 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 271 flow. Second operand 3 states and 990 transitions. [2023-09-01 01:31:19,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 385 flow [2023-09-01 01:31:19,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 348 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-09-01 01:31:19,455 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 222 flow [2023-09-01 01:31:19,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-09-01 01:31:19,455 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-09-01 01:31:19,455 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 222 flow [2023-09-01 01:31:19,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:19,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:19,456 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-09-01 01:31:19,469 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 [2023-09-01 01:31:19,666 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 [2023-09-01 01:31:19,666 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:19,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash 488945265, now seen corresponding path program 1 times [2023-09-01 01:31:19,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:19,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896301089] [2023-09-01 01:31:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:19,668 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 [2023-09-01 01:31:19,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:19,669 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) [2023-09-01 01:31:19,672 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 [2023-09-01 01:31:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:19,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:31:19,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:19,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:20,003 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 01:31:20,003 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 [2023-09-01 01:31:20,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:20,111 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 [2023-09-01 01:31:20,199 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:31:20,199 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 [2023-09-01 01:31:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:20,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:20,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:20,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896301089] [2023-09-01 01:31:20,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896301089] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:20,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:20,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:31:20,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940806654] [2023-09-01 01:31:20,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:20,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:31:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:20,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:31:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:31:20,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 758 [2023-09-01 01:31:20,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 315.75) internal successors, (1263), 4 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:20,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:20,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 758 [2023-09-01 01:31:20,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:20,989 INFO L130 PetriNetUnfolder]: 3261/4718 cut-off events. [2023-09-01 01:31:20,989 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-09-01 01:31:20,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9557 conditions, 4718 events. 3261/4718 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 22496 event pairs, 2777 based on Foata normal form. 0/2028 useless extension candidates. Maximal degree in co-relation 9544. Up to 4718 conditions per place. [2023-09-01 01:31:21,003 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 61 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-09-01 01:31:21,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 332 flow [2023-09-01 01:31:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 994 transitions. [2023-09-01 01:31:21,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371152154793316 [2023-09-01 01:31:21,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 994 transitions. [2023-09-01 01:31:21,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 994 transitions. [2023-09-01 01:31:21,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:21,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 994 transitions. [2023-09-01 01:31:21,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 331.3333333333333) internal successors, (994), 3 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:21,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:21,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:21,012 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 222 flow. Second operand 3 states and 994 transitions. [2023-09-01 01:31:21,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 332 flow [2023-09-01 01:31:21,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:21,014 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 209 flow [2023-09-01 01:31:21,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2023-09-01 01:31:21,014 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-09-01 01:31:21,015 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 209 flow [2023-09-01 01:31:21,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 315.75) internal successors, (1263), 4 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:21,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:21,015 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:21,029 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 [2023-09-01 01:31:21,228 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 [2023-09-01 01:31:21,228 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:21,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1724996868, now seen corresponding path program 1 times [2023-09-01 01:31:21,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:21,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559964991] [2023-09-01 01:31:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:21,229 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 [2023-09-01 01:31:21,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:21,230 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) [2023-09-01 01:31:21,233 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 [2023-09-01 01:31:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:21,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:31:21,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:21,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:21,575 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 01:31:21,575 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 [2023-09-01 01:31:21,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:21,679 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 [2023-09-01 01:31:21,755 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:31:21,756 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 [2023-09-01 01:31:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:21,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:21,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:21,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559964991] [2023-09-01 01:31:21,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559964991] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:21,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:21,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:31:21,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313916206] [2023-09-01 01:31:21,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:21,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:31:21,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:21,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:31:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:31:22,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 758 [2023-09-01 01:31:22,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 316.25) internal successors, (1265), 4 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:22,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:22,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 758 [2023-09-01 01:31:22,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:22,554 INFO L130 PetriNetUnfolder]: 3141/4534 cut-off events. [2023-09-01 01:31:22,554 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-09-01 01:31:22,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9190 conditions, 4534 events. 3141/4534 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 21473 event pairs, 2673 based on Foata normal form. 0/1988 useless extension candidates. Maximal degree in co-relation 9176. Up to 4534 conditions per place. [2023-09-01 01:31:22,566 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 59 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-09-01 01:31:22,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 325 flow [2023-09-01 01:31:22,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 992 transitions. [2023-09-01 01:31:22,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436235708003518 [2023-09-01 01:31:22,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 992 transitions. [2023-09-01 01:31:22,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 992 transitions. [2023-09-01 01:31:22,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:22,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 992 transitions. [2023-09-01 01:31:22,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:22,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:22,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:22,604 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 209 flow. Second operand 3 states and 992 transitions. [2023-09-01 01:31:22,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 325 flow [2023-09-01 01:31:22,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:22,606 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 206 flow [2023-09-01 01:31:22,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-09-01 01:31:22,607 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-09-01 01:31:22,607 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 206 flow [2023-09-01 01:31:22,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 316.25) internal successors, (1265), 4 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:22,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:22,607 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:22,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 01:31:22,821 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 [2023-09-01 01:31:22,822 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:22,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:22,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1724996870, now seen corresponding path program 1 times [2023-09-01 01:31:22,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:22,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233104308] [2023-09-01 01:31:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:22,823 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 [2023-09-01 01:31:22,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:22,824 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) [2023-09-01 01:31:22,825 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 [2023-09-01 01:31:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:23,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:31:23,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:23,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:23,251 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 01:31:23,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-09-01 01:31:23,268 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 42 treesize of output 38 [2023-09-01 01:31:23,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:23,367 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 [2023-09-01 01:31:23,464 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:31:23,465 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 12 treesize of output 18 [2023-09-01 01:31:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:23,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:23,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:23,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233104308] [2023-09-01 01:31:23,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233104308] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:23,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:23,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:31:23,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744928002] [2023-09-01 01:31:23,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:23,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:31:23,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:31:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:31:24,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-09-01 01:31:24,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:24,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:24,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-09-01 01:31:24,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:24,769 INFO L130 PetriNetUnfolder]: 3021/4350 cut-off events. [2023-09-01 01:31:24,770 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-09-01 01:31:24,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8823 conditions, 4350 events. 3021/4350 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 20468 event pairs, 2569 based on Foata normal form. 0/1948 useless extension candidates. Maximal degree in co-relation 8808. Up to 4350 conditions per place. [2023-09-01 01:31:24,783 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 57 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-09-01 01:31:24,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 318 flow [2023-09-01 01:31:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 984 transitions. [2023-09-01 01:31:24,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43271767810026385 [2023-09-01 01:31:24,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 984 transitions. [2023-09-01 01:31:24,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 984 transitions. [2023-09-01 01:31:24,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:24,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 984 transitions. [2023-09-01 01:31:24,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:24,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:24,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:24,790 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 206 flow. Second operand 3 states and 984 transitions. [2023-09-01 01:31:24,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 318 flow [2023-09-01 01:31:24,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:24,792 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 203 flow [2023-09-01 01:31:24,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2023-09-01 01:31:24,793 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-09-01 01:31:24,793 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 203 flow [2023-09-01 01:31:24,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:24,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:24,793 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:24,807 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 [2023-09-01 01:31:25,007 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 [2023-09-01 01:31:25,007 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:25,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1935297847, now seen corresponding path program 1 times [2023-09-01 01:31:25,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:25,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377757749] [2023-09-01 01:31:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:25,008 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 [2023-09-01 01:31:25,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:25,009 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) [2023-09-01 01:31:25,009 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 [2023-09-01 01:31:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:25,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:31:25,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:25,327 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:31:25,327 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 [2023-09-01 01:31:25,364 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:31:25,364 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 [2023-09-01 01:31:25,392 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:31:25,392 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 [2023-09-01 01:31:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:25,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:25,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:25,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377757749] [2023-09-01 01:31:25,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377757749] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:25,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:25,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:31:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412277721] [2023-09-01 01:31:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:25,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:31:25,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:25,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:31:25,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:31:25,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 758 [2023-09-01 01:31:25,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:25,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:25,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 758 [2023-09-01 01:31:25,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:26,073 INFO L130 PetriNetUnfolder]: 2346/3389 cut-off events. [2023-09-01 01:31:26,073 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-09-01 01:31:26,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6886 conditions, 3389 events. 2346/3389 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 15216 event pairs, 1962 based on Foata normal form. 0/1625 useless extension candidates. Maximal degree in co-relation 6870. Up to 3383 conditions per place. [2023-09-01 01:31:26,083 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 54 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-09-01 01:31:26,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 311 flow [2023-09-01 01:31:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:31:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:31:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1250 transitions. [2023-09-01 01:31:26,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41226912928759896 [2023-09-01 01:31:26,087 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1250 transitions. [2023-09-01 01:31:26,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1250 transitions. [2023-09-01 01:31:26,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:26,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1250 transitions. [2023-09-01 01:31:26,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 312.5) internal successors, (1250), 4 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:26,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:26,092 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:26,092 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 203 flow. Second operand 4 states and 1250 transitions. [2023-09-01 01:31:26,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 311 flow [2023-09-01 01:31:26,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:26,094 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 202 flow [2023-09-01 01:31:26,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-09-01 01:31:26,095 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-09-01 01:31:26,095 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 202 flow [2023-09-01 01:31:26,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:26,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:26,095 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:26,109 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 [2023-09-01 01:31:26,308 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 [2023-09-01 01:31:26,308 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:26,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:26,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1935297910, now seen corresponding path program 1 times [2023-09-01 01:31:26,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:26,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199932041] [2023-09-01 01:31:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:26,309 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 [2023-09-01 01:31:26,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:26,310 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) [2023-09-01 01:31:26,311 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 [2023-09-01 01:31:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:26,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:31:26,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:26,608 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 [2023-09-01 01:31:26,644 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:31:26,644 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 [2023-09-01 01:31:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:26,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:26,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:26,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199932041] [2023-09-01 01:31:26,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199932041] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:26,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:26,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:31:26,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554789733] [2023-09-01 01:31:26,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:26,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:31:26,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:26,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:31:26,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:31:26,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 758 [2023-09-01 01:31:26,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 303.5) internal successors, (1214), 4 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:26,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:26,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 758 [2023-09-01 01:31:26,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:27,168 INFO L130 PetriNetUnfolder]: 1801/2614 cut-off events. [2023-09-01 01:31:27,168 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-09-01 01:31:27,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5330 conditions, 2614 events. 1801/2614 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 11152 event pairs, 1477 based on Foata normal form. 0/1336 useless extension candidates. Maximal degree in co-relation 5313. Up to 2602 conditions per place. [2023-09-01 01:31:27,179 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 52 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-09-01 01:31:27,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 306 flow [2023-09-01 01:31:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:31:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:31:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1248 transitions. [2023-09-01 01:31:27,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41160949868073876 [2023-09-01 01:31:27,182 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1248 transitions. [2023-09-01 01:31:27,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1248 transitions. [2023-09-01 01:31:27,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:27,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1248 transitions. [2023-09-01 01:31:27,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:27,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:27,186 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:27,186 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 202 flow. Second operand 4 states and 1248 transitions. [2023-09-01 01:31:27,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 306 flow [2023-09-01 01:31:27,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:31:27,188 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 199 flow [2023-09-01 01:31:27,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-09-01 01:31:27,189 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-09-01 01:31:27,189 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 199 flow [2023-09-01 01:31:27,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 303.5) internal successors, (1214), 4 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:27,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:27,190 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:27,202 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 [2023-09-01 01:31:27,402 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 [2023-09-01 01:31:27,403 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:27,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:27,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1935297911, now seen corresponding path program 1 times [2023-09-01 01:31:27,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:27,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027308827] [2023-09-01 01:31:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:27,403 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 [2023-09-01 01:31:27,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:27,405 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) [2023-09-01 01:31:27,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 01:31:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:27,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:31:27,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:27,694 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 [2023-09-01 01:31:27,698 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 5 [2023-09-01 01:31:27,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:27,761 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 [2023-09-01 01:31:27,770 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:31:27,771 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 [2023-09-01 01:31:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:27,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:27,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:27,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027308827] [2023-09-01 01:31:27,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027308827] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:27,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:27,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:31:27,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328663468] [2023-09-01 01:31:27,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:27,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:31:27,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:31:27,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:31:28,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 758 [2023-09-01 01:31:28,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 301.0) internal successors, (1505), 5 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:28,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:28,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 758 [2023-09-01 01:31:28,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:28,825 INFO L130 PetriNetUnfolder]: 3065/4444 cut-off events. [2023-09-01 01:31:28,825 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-09-01 01:31:28,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9023 conditions, 4444 events. 3065/4444 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22208 event pairs, 1477 based on Foata normal form. 0/2270 useless extension candidates. Maximal degree in co-relation 9006. Up to 2602 conditions per place. [2023-09-01 01:31:28,844 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 82 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-09-01 01:31:28,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 440 flow [2023-09-01 01:31:28,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:31:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:31:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1570 transitions. [2023-09-01 01:31:28,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41424802110817943 [2023-09-01 01:31:28,847 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1570 transitions. [2023-09-01 01:31:28,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1570 transitions. [2023-09-01 01:31:28,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:28,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1570 transitions. [2023-09-01 01:31:28,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:28,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:28,852 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:28,852 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 199 flow. Second operand 5 states and 1570 transitions. [2023-09-01 01:31:28,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 440 flow [2023-09-01 01:31:28,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 437 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:31:28,853 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 212 flow [2023-09-01 01:31:28,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-09-01 01:31:28,854 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-09-01 01:31:28,854 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 212 flow [2023-09-01 01:31:28,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 301.0) internal successors, (1505), 5 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:28,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:28,855 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:28,864 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 [2023-09-01 01:31:29,055 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 [2023-09-01 01:31:29,055 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:29,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1935297848, now seen corresponding path program 1 times [2023-09-01 01:31:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:29,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275729374] [2023-09-01 01:31:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:29,057 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 [2023-09-01 01:31:29,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:29,058 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) [2023-09-01 01:31:29,061 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 [2023-09-01 01:31:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:29,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:31:29,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:29,462 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:31:29,463 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 [2023-09-01 01:31:29,544 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:31:29,544 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 42 [2023-09-01 01:31:29,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:29,624 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 [2023-09-01 01:31:29,631 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:31:29,631 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 [2023-09-01 01:31:29,667 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:31:29,668 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 12 treesize of output 14 [2023-09-01 01:31:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:29,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:29,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:29,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275729374] [2023-09-01 01:31:29,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275729374] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:29,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:29,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:31:29,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592452907] [2023-09-01 01:31:29,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:29,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:31:29,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:29,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:31:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:31:30,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 758 [2023-09-01 01:31:30,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:30,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:30,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 758 [2023-09-01 01:31:30,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:30,702 INFO L130 PetriNetUnfolder]: 2797/4062 cut-off events. [2023-09-01 01:31:30,702 INFO L131 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2023-09-01 01:31:30,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8823 conditions, 4062 events. 2797/4062 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19865 event pairs, 1477 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 8805. Up to 2608 conditions per place. [2023-09-01 01:31:30,715 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-09-01 01:31:30,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 447 flow [2023-09-01 01:31:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:31:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:31:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1569 transitions. [2023-09-01 01:31:30,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139841688654354 [2023-09-01 01:31:30,718 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1569 transitions. [2023-09-01 01:31:30,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1569 transitions. [2023-09-01 01:31:30,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:30,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1569 transitions. [2023-09-01 01:31:30,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:30,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:30,723 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:30,724 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 212 flow. Second operand 5 states and 1569 transitions. [2023-09-01 01:31:30,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 447 flow [2023-09-01 01:31:30,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 441 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:31:30,726 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 218 flow [2023-09-01 01:31:30,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-09-01 01:31:30,727 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-09-01 01:31:30,727 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 218 flow [2023-09-01 01:31:30,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:30,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:30,727 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:30,747 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 [2023-09-01 01:31:30,939 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 [2023-09-01 01:31:30,940 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:30,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:30,940 INFO L85 PathProgramCache]: Analyzing trace with hash -135353714, now seen corresponding path program 1 times [2023-09-01 01:31:30,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:30,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337499862] [2023-09-01 01:31:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:30,941 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 [2023-09-01 01:31:30,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:30,941 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) [2023-09-01 01:31:30,942 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 [2023-09-01 01:31:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:31,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:31:31,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:31,271 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 01:31:31,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-09-01 01:31:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:31,325 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 [2023-09-01 01:31:31,388 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 01:31:31,388 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 [2023-09-01 01:31:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:31,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:31,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:31,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337499862] [2023-09-01 01:31:31,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337499862] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:31,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:31,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:31:31,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997740064] [2023-09-01 01:31:31,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:31,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:31:31,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:31,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:31:31,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:31:31,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 758 [2023-09-01 01:31:31,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 312.75) internal successors, (1251), 4 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:31,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:31,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 758 [2023-09-01 01:31:31,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:32,253 INFO L130 PetriNetUnfolder]: 2659/3849 cut-off events. [2023-09-01 01:31:32,253 INFO L131 PetriNetUnfolder]: For 1331/1331 co-relation queries the response was YES. [2023-09-01 01:31:32,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8684 conditions, 3849 events. 2659/3849 cut-off events. For 1331/1331 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 17505 event pairs, 2233 based on Foata normal form. 0/2284 useless extension candidates. Maximal degree in co-relation 8665. Up to 3849 conditions per place. [2023-09-01 01:31:32,266 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-09-01 01:31:32,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 320 flow [2023-09-01 01:31:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 972 transitions. [2023-09-01 01:31:32,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42744063324538256 [2023-09-01 01:31:32,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 972 transitions. [2023-09-01 01:31:32,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 972 transitions. [2023-09-01 01:31:32,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:32,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 972 transitions. [2023-09-01 01:31:32,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:32,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:32,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:32,272 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 218 flow. Second operand 3 states and 972 transitions. [2023-09-01 01:31:32,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 320 flow [2023-09-01 01:31:32,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 53 transitions, 312 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:31:32,274 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 208 flow [2023-09-01 01:31:32,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-09-01 01:31:32,275 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-09-01 01:31:32,275 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 208 flow [2023-09-01 01:31:32,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 312.75) internal successors, (1251), 4 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:32,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:32,276 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:32,285 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 [2023-09-01 01:31:32,480 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 [2023-09-01 01:31:32,481 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:32,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash -135353713, now seen corresponding path program 1 times [2023-09-01 01:31:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:32,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55651537] [2023-09-01 01:31:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:32,482 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 [2023-09-01 01:31:32,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:32,483 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) [2023-09-01 01:31:32,484 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 [2023-09-01 01:31:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:32,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:31:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:32,872 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 01:31:32,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-09-01 01:31:32,883 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 88 treesize of output 84 [2023-09-01 01:31:32,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:32,963 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 [2023-09-01 01:31:33,048 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:31:33,049 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 12 treesize of output 18 [2023-09-01 01:31:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:33,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:31:33,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:33,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55651537] [2023-09-01 01:31:33,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55651537] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:31:33,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:31:33,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:31:33,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554607629] [2023-09-01 01:31:33,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:31:33,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:31:33,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:31:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:31:33,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 758 [2023-09-01 01:31:33,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:33,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:33,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 758 [2023-09-01 01:31:33,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:34,301 INFO L130 PetriNetUnfolder]: 2521/3636 cut-off events. [2023-09-01 01:31:34,302 INFO L131 PetriNetUnfolder]: For 749/749 co-relation queries the response was YES. [2023-09-01 01:31:34,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8001 conditions, 3636 events. 2521/3636 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 16365 event pairs, 2113 based on Foata normal form. 0/2204 useless extension candidates. Maximal degree in co-relation 7982. Up to 3636 conditions per place. [2023-09-01 01:31:34,311 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 01:31:34,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 306 flow [2023-09-01 01:31:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:31:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:31:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 970 transitions. [2023-09-01 01:31:34,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42656112576956906 [2023-09-01 01:31:34,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 970 transitions. [2023-09-01 01:31:34,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 970 transitions. [2023-09-01 01:31:34,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:34,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 970 transitions. [2023-09-01 01:31:34,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:34,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:34,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:34,316 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 208 flow. Second operand 3 states and 970 transitions. [2023-09-01 01:31:34,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 306 flow [2023-09-01 01:31:34,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:34,318 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 205 flow [2023-09-01 01:31:34,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-09-01 01:31:34,319 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-09-01 01:31:34,319 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 205 flow [2023-09-01 01:31:34,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:34,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:34,319 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:34,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 01:31:34,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:31:34,529 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:34,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:34,529 INFO L85 PathProgramCache]: Analyzing trace with hash 100495166, now seen corresponding path program 1 times [2023-09-01 01:31:34,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:34,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464160414] [2023-09-01 01:31:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:34,530 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 [2023-09-01 01:31:34,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:34,530 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:31:34,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 01:31:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:34,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:31:34,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:34,937 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 5 [2023-09-01 01:31:34,978 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:31:34,979 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 12 treesize of output 14 [2023-09-01 01:31:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:35,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:31:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:35,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:35,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464160414] [2023-09-01 01:31:35,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464160414] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:31:35,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:31:35,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:31:35,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253051275] [2023-09-01 01:31:35,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:31:35,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:31:35,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:35,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:31:35,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:31:37,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-09-01 01:31:37,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 205 flow. Second operand has 10 states, 10 states have (on average 306.2) internal successors, (3062), 10 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:37,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:37,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-09-01 01:31:37,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:39,255 INFO L130 PetriNetUnfolder]: 5941/8550 cut-off events. [2023-09-01 01:31:39,255 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2023-09-01 01:31:39,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18526 conditions, 8550 events. 5941/8550 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 44651 event pairs, 1325 based on Foata normal form. 300/5438 useless extension candidates. Maximal degree in co-relation 18506. Up to 2326 conditions per place. [2023-09-01 01:31:39,284 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 154 selfloop transitions, 7 changer transitions 0/161 dead transitions. [2023-09-01 01:31:39,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 161 transitions, 779 flow [2023-09-01 01:31:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:31:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:31:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2584 transitions. [2023-09-01 01:31:39,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261213720316623 [2023-09-01 01:31:39,289 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2584 transitions. [2023-09-01 01:31:39,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2584 transitions. [2023-09-01 01:31:39,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:39,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2584 transitions. [2023-09-01 01:31:39,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:39,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:39,296 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:39,296 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 205 flow. Second operand 8 states and 2584 transitions. [2023-09-01 01:31:39,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 161 transitions, 779 flow [2023-09-01 01:31:39,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 161 transitions, 778 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:31:39,299 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 244 flow [2023-09-01 01:31:39,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2023-09-01 01:31:39,300 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-09-01 01:31:39,300 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 244 flow [2023-09-01 01:31:39,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 306.2) internal successors, (3062), 10 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:39,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:39,301 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:39,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 01:31:39,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:31:39,501 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:39,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:39,502 INFO L85 PathProgramCache]: Analyzing trace with hash 100495103, now seen corresponding path program 1 times [2023-09-01 01:31:39,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:39,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381018274] [2023-09-01 01:31:39,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:39,502 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 [2023-09-01 01:31:39,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:39,503 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:31:39,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 01:31:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:39,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 01:31:39,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:31:39,940 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:31:39,941 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 [2023-09-01 01:31:40,022 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:31:40,023 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 42 [2023-09-01 01:31:40,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:31:40,098 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 [2023-09-01 01:31:40,107 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:31:40,107 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 [2023-09-01 01:31:40,155 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:31:40,155 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 12 treesize of output 14 [2023-09-01 01:31:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:40,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:31:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:31:42,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:31:42,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381018274] [2023-09-01 01:31:42,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381018274] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:31:42,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:31:42,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:31:42,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078629438] [2023-09-01 01:31:42,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:31:42,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:31:42,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:31:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:31:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:31:45,365 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] [2023-09-01 01:31:48,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:31:50,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:31:55,386 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] [2023-09-01 01:31:57,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 758 [2023-09-01 01:31:57,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 244 flow. Second operand has 12 states, 12 states have (on average 298.0) internal successors, (3576), 12 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:57,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:31:57,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 758 [2023-09-01 01:31:57,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:31:59,290 INFO L130 PetriNetUnfolder]: 5221/7530 cut-off events. [2023-09-01 01:31:59,290 INFO L131 PetriNetUnfolder]: For 2784/2784 co-relation queries the response was YES. [2023-09-01 01:31:59,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17367 conditions, 7530 events. 5221/7530 cut-off events. For 2784/2784 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 37886 event pairs, 901 based on Foata normal form. 300/4754 useless extension candidates. Maximal degree in co-relation 17343. Up to 1978 conditions per place. [2023-09-01 01:31:59,319 INFO L137 encePairwiseOnDemand]: 751/758 looper letters, 148 selfloop transitions, 10 changer transitions 0/158 dead transitions. [2023-09-01 01:31:59,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 158 transitions, 788 flow [2023-09-01 01:31:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:31:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:31:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2516 transitions. [2023-09-01 01:31:59,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41490765171503957 [2023-09-01 01:31:59,324 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2516 transitions. [2023-09-01 01:31:59,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2516 transitions. [2023-09-01 01:31:59,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:31:59,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2516 transitions. [2023-09-01 01:31:59,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 314.5) internal successors, (2516), 8 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:59,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:59,330 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:59,330 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 244 flow. Second operand 8 states and 2516 transitions. [2023-09-01 01:31:59,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 158 transitions, 788 flow [2023-09-01 01:31:59,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 158 transitions, 777 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 01:31:59,343 INFO L231 Difference]: Finished difference. Result has 77 places, 55 transitions, 278 flow [2023-09-01 01:31:59,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=278, PETRI_PLACES=77, PETRI_TRANSITIONS=55} [2023-09-01 01:31:59,343 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-09-01 01:31:59,343 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 55 transitions, 278 flow [2023-09-01 01:31:59,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 298.0) internal successors, (3576), 12 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:31:59,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:31:59,344 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:31:59,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 01:31:59,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:31:59,544 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:31:59,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:31:59,545 INFO L85 PathProgramCache]: Analyzing trace with hash 99005879, now seen corresponding path program 1 times [2023-09-01 01:31:59,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:31:59,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946698822] [2023-09-01 01:31:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:31:59,545 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 [2023-09-01 01:31:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:31:59,547 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:31:59,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 01:31:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:31:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:31:59,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:00,034 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:32:00,034 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 [2023-09-01 01:32:00,105 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:32:00,105 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 42 [2023-09-01 01:32:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:32:00,185 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 [2023-09-01 01:32:00,193 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:32:00,194 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 [2023-09-01 01:32:00,228 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:32:00,229 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 12 treesize of output 14 [2023-09-01 01:32:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:32:00,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:00,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:00,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946698822] [2023-09-01 01:32:00,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946698822] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:00,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:00,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:00,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526766150] [2023-09-01 01:32:00,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:00,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:32:00,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:00,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:32:00,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:32:00,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 758 [2023-09-01 01:32:00,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 55 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:00,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:00,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 758 [2023-09-01 01:32:00,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:02,170 INFO L130 PetriNetUnfolder]: 8941/12880 cut-off events. [2023-09-01 01:32:02,170 INFO L131 PetriNetUnfolder]: For 11835/11835 co-relation queries the response was YES. [2023-09-01 01:32:02,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32692 conditions, 12880 events. 8941/12880 cut-off events. For 11835/11835 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 72211 event pairs, 4477 based on Foata normal form. 0/8408 useless extension candidates. Maximal degree in co-relation 32664. Up to 7524 conditions per place. [2023-09-01 01:32:02,223 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 82 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-09-01 01:32:02,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 86 transitions, 588 flow [2023-09-01 01:32:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:32:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:32:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1560 transitions. [2023-09-01 01:32:02,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41160949868073876 [2023-09-01 01:32:02,226 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1560 transitions. [2023-09-01 01:32:02,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1560 transitions. [2023-09-01 01:32:02,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:02,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1560 transitions. [2023-09-01 01:32:02,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:02,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:02,230 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:02,230 INFO L175 Difference]: Start difference. First operand has 77 places, 55 transitions, 278 flow. Second operand 5 states and 1560 transitions. [2023-09-01 01:32:02,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 86 transitions, 588 flow [2023-09-01 01:32:02,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 537 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-09-01 01:32:02,247 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 267 flow [2023-09-01 01:32:02,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-09-01 01:32:02,248 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 8 predicate places. [2023-09-01 01:32:02,248 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 267 flow [2023-09-01 01:32:02,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 301.0) internal successors, (1806), 6 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:02,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:02,248 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:02,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:02,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:02,449 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:02,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash 99005947, now seen corresponding path program 1 times [2023-09-01 01:32:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:02,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196966526] [2023-09-01 01:32:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:02,450 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 [2023-09-01 01:32:02,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:02,451 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:02,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 01:32:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:02,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:32:02,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:02,729 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 5 [2023-09-01 01:32:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:32:02,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:02,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:02,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196966526] [2023-09-01 01:32:02,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196966526] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:02,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:02,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:02,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041152629] [2023-09-01 01:32:02,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:02,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:32:02,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:02,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:32:02,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:32:03,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 758 [2023-09-01 01:32:03,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 307.4) internal successors, (1537), 5 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:03,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:03,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 758 [2023-09-01 01:32:03,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:04,330 INFO L130 PetriNetUnfolder]: 8209/11836 cut-off events. [2023-09-01 01:32:04,331 INFO L131 PetriNetUnfolder]: For 6351/6351 co-relation queries the response was YES. [2023-09-01 01:32:04,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29726 conditions, 11836 events. 8209/11836 cut-off events. For 6351/6351 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 65158 event pairs, 4477 based on Foata normal form. 0/8016 useless extension candidates. Maximal degree in co-relation 29701. Up to 7512 conditions per place. [2023-09-01 01:32:04,389 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-09-01 01:32:04,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 85 transitions, 547 flow [2023-09-01 01:32:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:32:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:32:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1589 transitions. [2023-09-01 01:32:04,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192612137203166 [2023-09-01 01:32:04,393 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1589 transitions. [2023-09-01 01:32:04,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1589 transitions. [2023-09-01 01:32:04,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:04,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1589 transitions. [2023-09-01 01:32:04,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:04,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:04,398 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:04,398 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 267 flow. Second operand 5 states and 1589 transitions. [2023-09-01 01:32:04,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 85 transitions, 547 flow [2023-09-01 01:32:04,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 541 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:32:04,406 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 273 flow [2023-09-01 01:32:04,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2023-09-01 01:32:04,406 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-09-01 01:32:04,406 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 273 flow [2023-09-01 01:32:04,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 307.4) internal successors, (1537), 5 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:04,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:04,407 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:04,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:04,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:04,607 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:04,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:04,607 INFO L85 PathProgramCache]: Analyzing trace with hash 99005949, now seen corresponding path program 1 times [2023-09-01 01:32:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:04,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586800616] [2023-09-01 01:32:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:04,608 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 [2023-09-01 01:32:04,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:04,609 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:04,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 01:32:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:04,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:32:04,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:04,899 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 [2023-09-01 01:32:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:32:04,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:04,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:04,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586800616] [2023-09-01 01:32:04,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586800616] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:04,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:04,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:32:04,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894033011] [2023-09-01 01:32:04,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:04,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:32:04,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:04,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:32:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:32:05,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 758 [2023-09-01 01:32:05,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:05,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:05,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 758 [2023-09-01 01:32:05,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:05,892 INFO L130 PetriNetUnfolder]: 5735/8304 cut-off events. [2023-09-01 01:32:05,892 INFO L131 PetriNetUnfolder]: For 5527/5527 co-relation queries the response was YES. [2023-09-01 01:32:05,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21953 conditions, 8304 events. 5735/8304 cut-off events. For 5527/5527 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 41806 event pairs, 4925 based on Foata normal form. 0/6360 useless extension candidates. Maximal degree in co-relation 21927. Up to 8286 conditions per place. [2023-09-01 01:32:05,937 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 52 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-09-01 01:32:05,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 54 transitions, 377 flow [2023-09-01 01:32:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:32:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:32:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1242 transitions. [2023-09-01 01:32:05,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096306068601583 [2023-09-01 01:32:05,939 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1242 transitions. [2023-09-01 01:32:05,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1242 transitions. [2023-09-01 01:32:05,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:05,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1242 transitions. [2023-09-01 01:32:05,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 310.5) internal successors, (1242), 4 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:05,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:05,943 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:05,943 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 273 flow. Second operand 4 states and 1242 transitions. [2023-09-01 01:32:05,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 54 transitions, 377 flow [2023-09-01 01:32:05,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 54 transitions, 369 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:32:05,952 INFO L231 Difference]: Finished difference. Result has 72 places, 54 transitions, 265 flow [2023-09-01 01:32:05,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=265, PETRI_PLACES=72, PETRI_TRANSITIONS=54} [2023-09-01 01:32:05,953 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2023-09-01 01:32:05,953 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 54 transitions, 265 flow [2023-09-01 01:32:05,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:05,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:05,953 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:05,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:06,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:06,168 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:06,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash 655479316, now seen corresponding path program 1 times [2023-09-01 01:32:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:06,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901771399] [2023-09-01 01:32:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:06,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:06,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:06,170 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:06,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 01:32:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 01:32:06,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:06,662 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:32:06,663 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 42 [2023-09-01 01:32:06,733 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:32:06,734 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 [2023-09-01 01:32:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:32:06,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:32:06,802 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:32:06,803 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 [2023-09-01 01:32:06,835 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:32:06,835 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 12 treesize of output 14 [2023-09-01 01:32:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:32:06,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:32:09,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:09,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901771399] [2023-09-01 01:32:09,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901771399] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:09,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:09,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 01:32:09,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090245755] [2023-09-01 01:32:09,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:09,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 01:32:09,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:09,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 01:32:09,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:32:11,916 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] [2023-09-01 01:32:15,317 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] [2023-09-01 01:32:16,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 758 [2023-09-01 01:32:16,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 54 transitions, 265 flow. Second operand has 12 states, 12 states have (on average 298.3333333333333) internal successors, (3580), 12 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:16,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:16,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 758 [2023-09-01 01:32:16,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:18,738 INFO L130 PetriNetUnfolder]: 12371/17780 cut-off events. [2023-09-01 01:32:18,738 INFO L131 PetriNetUnfolder]: For 11255/11255 co-relation queries the response was YES. [2023-09-01 01:32:18,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45123 conditions, 17780 events. 12371/17780 cut-off events. For 11255/11255 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 98874 event pairs, 2065 based on Foata normal form. 798/14246 useless extension candidates. Maximal degree in co-relation 45097. Up to 4194 conditions per place. [2023-09-01 01:32:18,874 INFO L137 encePairwiseOnDemand]: 751/758 looper letters, 158 selfloop transitions, 9 changer transitions 0/167 dead transitions. [2023-09-01 01:32:18,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 167 transitions, 1043 flow [2023-09-01 01:32:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:32:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:32:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2501 transitions. [2023-09-01 01:32:18,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41243403693931396 [2023-09-01 01:32:18,877 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2501 transitions. [2023-09-01 01:32:18,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2501 transitions. [2023-09-01 01:32:18,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:18,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2501 transitions. [2023-09-01 01:32:18,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 312.625) internal successors, (2501), 8 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:18,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:18,883 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:18,883 INFO L175 Difference]: Start difference. First operand has 72 places, 54 transitions, 265 flow. Second operand 8 states and 2501 transitions. [2023-09-01 01:32:18,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 167 transitions, 1043 flow [2023-09-01 01:32:18,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 167 transitions, 1040 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:32:18,892 INFO L231 Difference]: Finished difference. Result has 81 places, 58 transitions, 317 flow [2023-09-01 01:32:18,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=317, PETRI_PLACES=81, PETRI_TRANSITIONS=58} [2023-09-01 01:32:18,893 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 16 predicate places. [2023-09-01 01:32:18,893 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 58 transitions, 317 flow [2023-09-01 01:32:18,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 298.3333333333333) internal successors, (3580), 12 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:18,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:18,894 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:18,906 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 (24)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:19,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:19,098 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:19,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:19,099 INFO L85 PathProgramCache]: Analyzing trace with hash 652748557, now seen corresponding path program 1 times [2023-09-01 01:32:19,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:19,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700764437] [2023-09-01 01:32:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:19,099 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 [2023-09-01 01:32:19,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:19,100 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:19,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-09-01 01:32:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:32:19,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:19,453 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 5 [2023-09-01 01:32:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:32:19,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:19,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:19,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700764437] [2023-09-01 01:32:19,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700764437] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:19,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:19,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:19,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368613340] [2023-09-01 01:32:19,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:19,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:32:19,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:19,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:32:19,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:32:19,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 758 [2023-09-01 01:32:19,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 58 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 307.8) internal successors, (1539), 5 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:19,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:19,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 758 [2023-09-01 01:32:19,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:22,614 INFO L130 PetriNetUnfolder]: 18929/27160 cut-off events. [2023-09-01 01:32:22,614 INFO L131 PetriNetUnfolder]: For 30563/30563 co-relation queries the response was YES. [2023-09-01 01:32:22,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77776 conditions, 27160 events. 18929/27160 cut-off events. For 30563/30563 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 161702 event pairs, 10685 based on Foata normal form. 0/22196 useless extension candidates. Maximal degree in co-relation 77746. Up to 17762 conditions per place. [2023-09-01 01:32:22,843 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 86 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-09-01 01:32:22,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 90 transitions, 666 flow [2023-09-01 01:32:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:32:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:32:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1584 transitions. [2023-09-01 01:32:22,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4179419525065963 [2023-09-01 01:32:22,845 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1584 transitions. [2023-09-01 01:32:22,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1584 transitions. [2023-09-01 01:32:22,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:22,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1584 transitions. [2023-09-01 01:32:22,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 316.8) internal successors, (1584), 5 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:22,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:22,850 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:22,850 INFO L175 Difference]: Start difference. First operand has 81 places, 58 transitions, 317 flow. Second operand 5 states and 1584 transitions. [2023-09-01 01:32:22,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 90 transitions, 666 flow [2023-09-01 01:32:22,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 643 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-09-01 01:32:22,905 INFO L231 Difference]: Finished difference. Result has 83 places, 59 transitions, 320 flow [2023-09-01 01:32:22,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=83, PETRI_TRANSITIONS=59} [2023-09-01 01:32:22,906 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 18 predicate places. [2023-09-01 01:32:22,906 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 59 transitions, 320 flow [2023-09-01 01:32:22,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 307.8) internal successors, (1539), 5 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:22,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:22,906 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:22,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:23,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:23,107 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:23,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:23,107 INFO L85 PathProgramCache]: Analyzing trace with hash 655479384, now seen corresponding path program 1 times [2023-09-01 01:32:23,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:23,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452005853] [2023-09-01 01:32:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:23,108 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 [2023-09-01 01:32:23,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:23,109 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:23,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 01:32:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:23,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:32:23,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:23,462 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 5 [2023-09-01 01:32:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:32:23,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:32:23,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:23,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452005853] [2023-09-01 01:32:23,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452005853] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:23,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:23,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:32:23,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464111054] [2023-09-01 01:32:23,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:23,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:32:23,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:32:23,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:32:25,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-09-01 01:32:25,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 59 transitions, 320 flow. Second operand has 10 states, 10 states have (on average 306.4) internal successors, (3064), 10 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:25,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:25,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-09-01 01:32:25,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:28,981 INFO L130 PetriNetUnfolder]: 17573/25400 cut-off events. [2023-09-01 01:32:28,981 INFO L131 PetriNetUnfolder]: For 28098/28098 co-relation queries the response was YES. [2023-09-01 01:32:29,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74508 conditions, 25400 events. 17573/25400 cut-off events. For 28098/28098 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 150987 event pairs, 5029 based on Foata normal form. 1212/23248 useless extension candidates. Maximal degree in co-relation 74477. Up to 8390 conditions per place. [2023-09-01 01:32:29,178 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 163 selfloop transitions, 7 changer transitions 0/170 dead transitions. [2023-09-01 01:32:29,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 170 transitions, 1136 flow [2023-09-01 01:32:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:32:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:32:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2563 transitions. [2023-09-01 01:32:29,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42265831134564646 [2023-09-01 01:32:29,182 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2563 transitions. [2023-09-01 01:32:29,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2563 transitions. [2023-09-01 01:32:29,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:29,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2563 transitions. [2023-09-01 01:32:29,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 320.375) internal successors, (2563), 8 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:29,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:29,190 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:29,191 INFO L175 Difference]: Start difference. First operand has 83 places, 59 transitions, 320 flow. Second operand 8 states and 2563 transitions. [2023-09-01 01:32:29,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 170 transitions, 1136 flow [2023-09-01 01:32:29,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1120 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:32:29,313 INFO L231 Difference]: Finished difference. Result has 87 places, 59 transitions, 330 flow [2023-09-01 01:32:29,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=87, PETRI_TRANSITIONS=59} [2023-09-01 01:32:29,313 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 22 predicate places. [2023-09-01 01:32:29,313 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 59 transitions, 330 flow [2023-09-01 01:32:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 306.4) internal successors, (3064), 10 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:29,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:29,314 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:29,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:29,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:29,528 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:29,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash 652748412, now seen corresponding path program 1 times [2023-09-01 01:32:29,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:29,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83308649] [2023-09-01 01:32:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:29,529 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 [2023-09-01 01:32:29,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:29,530 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:29,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 01:32:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:29,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:32:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:29,982 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 [2023-09-01 01:32:29,986 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 5 [2023-09-01 01:32:30,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:32:30,033 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 [2023-09-01 01:32:30,039 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:32:30,039 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 [2023-09-01 01:32:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:32:30,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:32:30,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:30,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83308649] [2023-09-01 01:32:30,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83308649] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:32:30,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:32:30,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:32:30,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034332754] [2023-09-01 01:32:30,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:32:30,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:32:30,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:30,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:32:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:32:30,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 758 [2023-09-01 01:32:30,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 59 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 301.8) internal successors, (1509), 5 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:30,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:30,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 758 [2023-09-01 01:32:30,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:32:32,831 INFO L130 PetriNetUnfolder]: 15543/22492 cut-off events. [2023-09-01 01:32:32,831 INFO L131 PetriNetUnfolder]: For 26713/26713 co-relation queries the response was YES. [2023-09-01 01:32:32,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67840 conditions, 22492 events. 15543/22492 cut-off events. For 26713/26713 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 130903 event pairs, 10121 based on Foata normal form. 0/20088 useless extension candidates. Maximal degree in co-relation 67809. Up to 16614 conditions per place. [2023-09-01 01:32:32,962 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 85 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-09-01 01:32:32,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 675 flow [2023-09-01 01:32:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:32:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:32:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1553 transitions. [2023-09-01 01:32:32,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40976253298153037 [2023-09-01 01:32:32,964 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1553 transitions. [2023-09-01 01:32:32,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1553 transitions. [2023-09-01 01:32:32,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:32:32,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1553 transitions. [2023-09-01 01:32:32,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:32,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:32,968 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:32,969 INFO L175 Difference]: Start difference. First operand has 87 places, 59 transitions, 330 flow. Second operand 5 states and 1553 transitions. [2023-09-01 01:32:32,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 675 flow [2023-09-01 01:32:32,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 655 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:32:32,999 INFO L231 Difference]: Finished difference. Result has 86 places, 59 transitions, 330 flow [2023-09-01 01:32:32,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=86, PETRI_TRANSITIONS=59} [2023-09-01 01:32:33,000 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 21 predicate places. [2023-09-01 01:32:33,000 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 59 transitions, 330 flow [2023-09-01 01:32:33,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 301.8) internal successors, (1509), 5 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:33,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:32:33,000 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:32:33,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-09-01 01:32:33,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:32:33,201 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:32:33,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:32:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1239625657, now seen corresponding path program 1 times [2023-09-01 01:32:33,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:32:33,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452670871] [2023-09-01 01:32:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:32:33,202 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 [2023-09-01 01:32:33,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:32:33,203 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:32:33,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-09-01 01:32:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:32:33,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 01:32:33,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:32:33,602 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 5 [2023-09-01 01:32:33,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 01:32:33,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:32:33,649 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 [2023-09-01 01:32:33,657 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:32:33,658 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 [2023-09-01 01:32:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:32:33,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:32:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:32:36,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:32:36,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452670871] [2023-09-01 01:32:36,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452670871] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:32:36,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:32:36,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:32:36,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91358194] [2023-09-01 01:32:36,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:32:36,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:32:36,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:32:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:32:36,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:32:38,157 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] [2023-09-01 01:32:40,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:32:42,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:32:44,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:32:46,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:32:49,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:32:51,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:32:53,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:32:56,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:32:59,333 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] [2023-09-01 01:32:59,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 758 [2023-09-01 01:32:59,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 59 transitions, 330 flow. Second operand has 10 states, 10 states have (on average 290.8) internal successors, (2908), 10 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:32:59,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:32:59,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 758 [2023-09-01 01:32:59,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:05,662 INFO L130 PetriNetUnfolder]: 32661/46784 cut-off events. [2023-09-01 01:33:05,662 INFO L131 PetriNetUnfolder]: For 59727/59727 co-relation queries the response was YES. [2023-09-01 01:33:05,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141485 conditions, 46784 events. 32661/46784 cut-off events. For 59727/59727 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 297612 event pairs, 8173 based on Foata normal form. 2634/44602 useless extension candidates. Maximal degree in co-relation 141453. Up to 13706 conditions per place. [2023-09-01 01:33:06,005 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 177 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2023-09-01 01:33:06,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 185 transitions, 1360 flow [2023-09-01 01:33:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:33:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:33:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2430 transitions. [2023-09-01 01:33:06,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007255936675462 [2023-09-01 01:33:06,009 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2430 transitions. [2023-09-01 01:33:06,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2430 transitions. [2023-09-01 01:33:06,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:06,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2430 transitions. [2023-09-01 01:33:06,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 303.75) internal successors, (2430), 8 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:06,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:06,017 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:06,017 INFO L175 Difference]: Start difference. First operand has 86 places, 59 transitions, 330 flow. Second operand 8 states and 2430 transitions. [2023-09-01 01:33:06,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 185 transitions, 1360 flow [2023-09-01 01:33:06,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 185 transitions, 1352 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:33:06,076 INFO L231 Difference]: Finished difference. Result has 93 places, 63 transitions, 375 flow [2023-09-01 01:33:06,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=375, PETRI_PLACES=93, PETRI_TRANSITIONS=63} [2023-09-01 01:33:06,077 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 28 predicate places. [2023-09-01 01:33:06,077 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 63 transitions, 375 flow [2023-09-01 01:33:06,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 290.8) internal successors, (2908), 10 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:06,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:06,077 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:06,088 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 (28)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:06,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:06,278 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:06,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:06,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1239625512, now seen corresponding path program 1 times [2023-09-01 01:33:06,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:06,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688637957] [2023-09-01 01:33:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:33:06,279 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 [2023-09-01 01:33:06,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:06,280 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:06,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-09-01 01:33:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:33:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:33:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:06,593 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 5 [2023-09-01 01:33:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:06,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:33:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:06,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:06,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688637957] [2023-09-01 01:33:06,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688637957] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:33:06,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:33:06,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:33:06,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120555921] [2023-09-01 01:33:06,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:33:06,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:33:06,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:06,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:33:06,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:33:09,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 758 [2023-09-01 01:33:09,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 63 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 306.6) internal successors, (3066), 10 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:09,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:09,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 758 [2023-09-01 01:33:09,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:14,910 INFO L130 PetriNetUnfolder]: 27723/40090 cut-off events. [2023-09-01 01:33:14,911 INFO L131 PetriNetUnfolder]: For 65488/65488 co-relation queries the response was YES. [2023-09-01 01:33:15,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132453 conditions, 40090 events. 27723/40090 cut-off events. For 65488/65488 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 253778 event pairs, 10121 based on Foata normal form. 2634/41584 useless extension candidates. Maximal degree in co-relation 132417. Up to 16608 conditions per place. [2023-09-01 01:33:15,219 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 175 selfloop transitions, 7 changer transitions 0/182 dead transitions. [2023-09-01 01:33:15,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 182 transitions, 1369 flow [2023-09-01 01:33:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:33:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:33:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2555 transitions. [2023-09-01 01:33:15,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42133905013192613 [2023-09-01 01:33:15,222 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2555 transitions. [2023-09-01 01:33:15,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2555 transitions. [2023-09-01 01:33:15,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:15,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2555 transitions. [2023-09-01 01:33:15,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 319.375) internal successors, (2555), 8 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:15,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:15,227 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:15,227 INFO L175 Difference]: Start difference. First operand has 93 places, 63 transitions, 375 flow. Second operand 8 states and 2555 transitions. [2023-09-01 01:33:15,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 182 transitions, 1369 flow [2023-09-01 01:33:15,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 182 transitions, 1348 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-09-01 01:33:15,680 INFO L231 Difference]: Finished difference. Result has 95 places, 62 transitions, 362 flow [2023-09-01 01:33:15,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=362, PETRI_PLACES=95, PETRI_TRANSITIONS=62} [2023-09-01 01:33:15,681 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 30 predicate places. [2023-09-01 01:33:15,681 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 62 transitions, 362 flow [2023-09-01 01:33:15,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 306.6) internal successors, (3066), 10 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:15,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:15,682 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:15,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:15,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:15,889 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:15,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2054984211, now seen corresponding path program 2 times [2023-09-01 01:33:15,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:15,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326785393] [2023-09-01 01:33:15,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:33:15,890 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 [2023-09-01 01:33:15,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:15,891 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:15,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-09-01 01:33:16,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:33:16,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:33:16,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 01:33:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:16,158 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:33:16,158 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 42 [2023-09-01 01:33:16,240 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:33:16,240 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 [2023-09-01 01:33:16,321 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:33:16,322 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 [2023-09-01 01:33:16,334 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 [2023-09-01 01:33:16,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:16,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:16,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-09-01 01:33:16,462 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-09-01 01:33:16,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 01:33:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-09-01 01:33:16,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:33:16,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:16,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326785393] [2023-09-01 01:33:16,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326785393] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:33:16,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:33:16,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:33:16,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898078365] [2023-09-01 01:33:16,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:33:16,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:33:16,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:16,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:33:16,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:33:17,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 758 [2023-09-01 01:33:17,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 62 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 300.4) internal successors, (1502), 5 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:17,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:33:17,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 758 [2023-09-01 01:33:17,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:33:22,383 INFO L130 PetriNetUnfolder]: 26479/38340 cut-off events. [2023-09-01 01:33:22,384 INFO L131 PetriNetUnfolder]: For 57750/57750 co-relation queries the response was YES. [2023-09-01 01:33:22,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122933 conditions, 38340 events. 26479/38340 cut-off events. For 57750/57750 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 236781 event pairs, 24525 based on Foata normal form. 0/37734 useless extension candidates. Maximal degree in co-relation 122899. Up to 38328 conditions per place. [2023-09-01 01:33:22,658 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 58 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-09-01 01:33:22,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 61 transitions, 478 flow [2023-09-01 01:33:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:33:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:33:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1526 transitions. [2023-09-01 01:33:22,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40263852242744064 [2023-09-01 01:33:22,661 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1526 transitions. [2023-09-01 01:33:22,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1526 transitions. [2023-09-01 01:33:22,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:33:22,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1526 transitions. [2023-09-01 01:33:22,664 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) [2023-09-01 01:33:22,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:22,666 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:22,666 INFO L175 Difference]: Start difference. First operand has 95 places, 62 transitions, 362 flow. Second operand 5 states and 1526 transitions. [2023-09-01 01:33:22,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 61 transitions, 478 flow [2023-09-01 01:33:22,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 61 transitions, 463 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-09-01 01:33:22,814 INFO L231 Difference]: Finished difference. Result has 91 places, 61 transitions, 347 flow [2023-09-01 01:33:22,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=91, PETRI_TRANSITIONS=61} [2023-09-01 01:33:22,814 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 26 predicate places. [2023-09-01 01:33:22,815 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 61 transitions, 347 flow [2023-09-01 01:33:22,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 300.4) internal successors, (1502), 5 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:33:22,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:33:22,815 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:33:22,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-09-01 01:33:23,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:33:23,020 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:33:23,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:33:23,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2054984148, now seen corresponding path program 2 times [2023-09-01 01:33:23,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:33:23,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239289234] [2023-09-01 01:33:23,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:33:23,021 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 [2023-09-01 01:33:23,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:33:23,022 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:33:23,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-09-01 01:33:23,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:33:23,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:33:23,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 01:33:23,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:33:23,488 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:33:23,488 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 42 [2023-09-01 01:33:23,557 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:33:23,557 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 [2023-09-01 01:33:23,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:33:23,627 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 [2023-09-01 01:33:23,647 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:33:23,647 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 [2023-09-01 01:33:23,762 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-09-01 01:33:23,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 01:33:23,768 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 [2023-09-01 01:33:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:23,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:33:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:33:25,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:33:25,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239289234] [2023-09-01 01:33:25,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239289234] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:33:25,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:33:25,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2023-09-01 01:33:25,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810127853] [2023-09-01 01:33:25,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:33:25,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 01:33:25,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:33:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 01:33:25,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-09-01 01:33:28,184 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] [2023-09-01 01:33:30,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:33,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:35,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:37,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:39,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:41,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:46,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:48,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:50,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:52,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:55,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:33:59,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:34:02,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:34:04,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:34:07,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:34:10,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:34:10,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 758 [2023-09-01 01:34:10,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 61 transitions, 347 flow. Second operand has 19 states, 19 states have (on average 268.89473684210526) internal successors, (5109), 19 states have internal predecessors, (5109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:10,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:10,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 758 [2023-09-01 01:34:10,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:17,381 INFO L130 PetriNetUnfolder]: 31277/45304 cut-off events. [2023-09-01 01:34:17,381 INFO L131 PetriNetUnfolder]: For 69117/69117 co-relation queries the response was YES. [2023-09-01 01:34:17,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139523 conditions, 45304 events. 31277/45304 cut-off events. For 69117/69117 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 292699 event pairs, 5209 based on Foata normal form. 506/45094 useless extension candidates. Maximal degree in co-relation 139489. Up to 8728 conditions per place. [2023-09-01 01:34:17,654 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 241 selfloop transitions, 10 changer transitions 0/251 dead transitions. [2023-09-01 01:34:17,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 251 transitions, 1740 flow [2023-09-01 01:34:17,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:34:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:34:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2847 transitions. [2023-09-01 01:34:17,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3755936675461741 [2023-09-01 01:34:17,657 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2847 transitions. [2023-09-01 01:34:17,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2847 transitions. [2023-09-01 01:34:17,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:17,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2847 transitions. [2023-09-01 01:34:17,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 284.7) internal successors, (2847), 10 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:17,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:17,663 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:17,663 INFO L175 Difference]: Start difference. First operand has 91 places, 61 transitions, 347 flow. Second operand 10 states and 2847 transitions. [2023-09-01 01:34:17,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 251 transitions, 1740 flow [2023-09-01 01:34:17,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 251 transitions, 1735 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:34:17,829 INFO L231 Difference]: Finished difference. Result has 99 places, 63 transitions, 387 flow [2023-09-01 01:34:17,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=387, PETRI_PLACES=99, PETRI_TRANSITIONS=63} [2023-09-01 01:34:17,830 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2023-09-01 01:34:17,830 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 63 transitions, 387 flow [2023-09-01 01:34:17,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 268.89473684210526) internal successors, (5109), 19 states have internal predecessors, (5109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:17,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:17,831 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:17,842 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 (31)] Forceful destruction successful, exit code 0 [2023-09-01 01:34:18,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:18,032 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:18,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1549156036, now seen corresponding path program 2 times [2023-09-01 01:34:18,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:18,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689831279] [2023-09-01 01:34:18,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:34:18,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:18,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:18,035 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:18,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-09-01 01:34:18,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:34:18,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:34:18,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 01:34:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:18,455 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 [2023-09-01 01:34:18,460 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 5 [2023-09-01 01:34:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:34:18,503 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 [2023-09-01 01:34:18,512 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:34:18,512 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 [2023-09-01 01:34:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:18,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:34:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:34:19,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:19,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689831279] [2023-09-01 01:34:19,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689831279] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:34:19,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:34:19,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-09-01 01:34:19,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492660217] [2023-09-01 01:34:19,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:34:19,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 01:34:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 01:34:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-09-01 01:34:24,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:34:26,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:34:30,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:34:32,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:34:34,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:34:38,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:34:41,091 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] [2023-09-01 01:34:42,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 758 [2023-09-01 01:34:42,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 63 transitions, 387 flow. Second operand has 16 states, 16 states have (on average 293.125) internal successors, (4690), 16 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:42,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:42,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 758 [2023-09-01 01:34:42,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:50,974 INFO L130 PetriNetUnfolder]: 38153/55228 cut-off events. [2023-09-01 01:34:50,975 INFO L131 PetriNetUnfolder]: For 112370/112370 co-relation queries the response was YES. [2023-09-01 01:34:51,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175803 conditions, 55228 events. 38153/55228 cut-off events. For 112370/112370 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 362815 event pairs, 9223 based on Foata normal form. 996/55352 useless extension candidates. Maximal degree in co-relation 175767. Up to 15460 conditions per place. [2023-09-01 01:34:51,408 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 239 selfloop transitions, 9 changer transitions 0/248 dead transitions. [2023-09-01 01:34:51,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 248 transitions, 2042 flow [2023-09-01 01:34:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:34:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:34:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3063 transitions. [2023-09-01 01:34:51,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.404089709762533 [2023-09-01 01:34:51,411 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3063 transitions. [2023-09-01 01:34:51,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3063 transitions. [2023-09-01 01:34:51,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:51,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3063 transitions. [2023-09-01 01:34:51,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 306.3) internal successors, (3063), 10 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:51,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:51,420 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:51,420 INFO L175 Difference]: Start difference. First operand has 99 places, 63 transitions, 387 flow. Second operand 10 states and 3063 transitions. [2023-09-01 01:34:51,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 248 transitions, 2042 flow [2023-09-01 01:34:52,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 248 transitions, 1940 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-09-01 01:34:52,168 INFO L231 Difference]: Finished difference. Result has 103 places, 65 transitions, 407 flow [2023-09-01 01:34:52,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=407, PETRI_PLACES=103, PETRI_TRANSITIONS=65} [2023-09-01 01:34:52,169 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 38 predicate places. [2023-09-01 01:34:52,169 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 65 transitions, 407 flow [2023-09-01 01:34:52,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 293.125) internal successors, (4690), 16 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:52,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:34:52,169 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:34:52,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2023-09-01 01:34:52,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:34:52,373 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:34:52,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:34:52,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1549155891, now seen corresponding path program 2 times [2023-09-01 01:34:52,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:34:52,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102616587] [2023-09-01 01:34:52,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:34:52,374 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 [2023-09-01 01:34:52,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:34:52,375 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:34:52,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-09-01 01:34:52,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:34:52,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:34:52,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 01:34:52,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:34:52,622 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 5 [2023-09-01 01:34:52,658 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:34:52,658 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 12 treesize of output 14 [2023-09-01 01:34:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 01:34:52,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:34:52,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:34:52,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102616587] [2023-09-01 01:34:52,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102616587] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:34:52,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:34:52,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:34:52,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552713423] [2023-09-01 01:34:52,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:34:52,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:34:52,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:34:52,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:34:52,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:34:53,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 758 [2023-09-01 01:34:53,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 65 transitions, 407 flow. Second operand has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:53,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:34:53,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 758 [2023-09-01 01:34:53,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:34:59,466 INFO L130 PetriNetUnfolder]: 33569/48652 cut-off events. [2023-09-01 01:34:59,466 INFO L131 PetriNetUnfolder]: For 89841/89841 co-relation queries the response was YES. [2023-09-01 01:34:59,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162915 conditions, 48652 events. 33569/48652 cut-off events. For 89841/89841 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 308920 event pairs, 31263 based on Foata normal form. 1992/49876 useless extension candidates. Maximal degree in co-relation 162877. Up to 48634 conditions per place. [2023-09-01 01:34:59,851 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 60 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-09-01 01:34:59,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 63 transitions, 520 flow [2023-09-01 01:34:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:34:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:34:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1565 transitions. [2023-09-01 01:34:59,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129287598944591 [2023-09-01 01:34:59,853 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1565 transitions. [2023-09-01 01:34:59,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1565 transitions. [2023-09-01 01:34:59,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:34:59,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1565 transitions. [2023-09-01 01:34:59,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:59,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:59,858 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:34:59,858 INFO L175 Difference]: Start difference. First operand has 103 places, 65 transitions, 407 flow. Second operand 5 states and 1565 transitions. [2023-09-01 01:34:59,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 63 transitions, 520 flow [2023-09-01 01:35:00,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 63 transitions, 501 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-09-01 01:35:00,297 INFO L231 Difference]: Finished difference. Result has 97 places, 63 transitions, 381 flow [2023-09-01 01:35:00,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=97, PETRI_TRANSITIONS=63} [2023-09-01 01:35:00,298 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 32 predicate places. [2023-09-01 01:35:00,298 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 63 transitions, 381 flow [2023-09-01 01:35:00,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:00,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:35:00,299 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:35:00,308 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 (33)] Forceful destruction successful, exit code 0 [2023-09-01 01:35:00,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:35:00,504 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:35:00,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:35:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash -779186809, now seen corresponding path program 3 times [2023-09-01 01:35:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:35:00,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169477483] [2023-09-01 01:35:00,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:35:00,505 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 [2023-09-01 01:35:00,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:35:00,506 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:35:00,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-09-01 01:35:01,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 01:35:01,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:35:01,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:35:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:35:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:35:01,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:35:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:35:01,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:35:01,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169477483] [2023-09-01 01:35:01,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169477483] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:35:01,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:35:01,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 01:35:01,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45197112] [2023-09-01 01:35:01,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:35:01,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:35:01,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:35:01,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:35:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:35:01,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 758 [2023-09-01 01:35:01,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 63 transitions, 381 flow. Second operand has 14 states, 14 states have (on average 320.85714285714283) internal successors, (4492), 14 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:01,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:35:01,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 758 [2023-09-01 01:35:01,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:35:08,715 INFO L130 PetriNetUnfolder]: 30281/44368 cut-off events. [2023-09-01 01:35:08,715 INFO L131 PetriNetUnfolder]: For 75552/75552 co-relation queries the response was YES. [2023-09-01 01:35:08,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137703 conditions, 44368 events. 30281/44368 cut-off events. For 75552/75552 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 291349 event pairs, 2611 based on Foata normal form. 1992/45644 useless extension candidates. Maximal degree in co-relation 137666. Up to 6636 conditions per place. [2023-09-01 01:35:08,977 INFO L137 encePairwiseOnDemand]: 755/758 looper letters, 238 selfloop transitions, 6 changer transitions 0/244 dead transitions. [2023-09-01 01:35:08,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 244 transitions, 1918 flow [2023-09-01 01:35:08,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:35:08,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:35:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2702 transitions. [2023-09-01 01:35:08,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44558047493403696 [2023-09-01 01:35:08,980 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2702 transitions. [2023-09-01 01:35:08,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2702 transitions. [2023-09-01 01:35:08,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:35:08,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2702 transitions. [2023-09-01 01:35:08,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 337.75) internal successors, (2702), 8 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:08,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:08,985 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:08,986 INFO L175 Difference]: Start difference. First operand has 97 places, 63 transitions, 381 flow. Second operand 8 states and 2702 transitions. [2023-09-01 01:35:08,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 244 transitions, 1918 flow [2023-09-01 01:35:09,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 244 transitions, 1900 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-09-01 01:35:09,698 INFO L231 Difference]: Finished difference. Result has 94 places, 61 transitions, 357 flow [2023-09-01 01:35:09,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=357, PETRI_PLACES=94, PETRI_TRANSITIONS=61} [2023-09-01 01:35:09,698 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 29 predicate places. [2023-09-01 01:35:09,698 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 61 transitions, 357 flow [2023-09-01 01:35:09,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 320.85714285714283) internal successors, (4492), 14 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:09,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:35:09,699 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:35:09,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2023-09-01 01:35:09,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:35:09,899 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:35:09,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:35:09,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2008247313, now seen corresponding path program 2 times [2023-09-01 01:35:09,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:35:09,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598609445] [2023-09-01 01:35:09,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:35:09,900 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 [2023-09-01 01:35:09,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:35:09,901 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:35:09,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-09-01 01:35:10,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:35:10,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:35:10,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 01:35:10,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:35:10,241 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:35:10,241 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 [2023-09-01 01:35:10,314 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:35:10,314 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 42 [2023-09-01 01:35:10,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:35:10,372 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 [2023-09-01 01:35:10,380 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 01:35:10,381 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 [2023-09-01 01:35:10,416 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:35:10,417 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 12 treesize of output 14 [2023-09-01 01:35:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-09-01 01:35:10,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:35:10,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:35:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598609445] [2023-09-01 01:35:10,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598609445] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:35:10,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:35:10,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:35:10,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720581245] [2023-09-01 01:35:10,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:35:10,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:35:10,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:35:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:35:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:35:11,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 758 [2023-09-01 01:35:11,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 61 transitions, 357 flow. Second operand has 6 states, 6 states have (on average 299.3333333333333) internal successors, (1796), 6 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:11,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:35:11,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 758 [2023-09-01 01:35:11,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:35:16,606 INFO L130 PetriNetUnfolder]: 28641/42012 cut-off events. [2023-09-01 01:35:16,606 INFO L131 PetriNetUnfolder]: For 48787/48787 co-relation queries the response was YES. [2023-09-01 01:35:16,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129951 conditions, 42012 events. 28641/42012 cut-off events. For 48787/48787 co-relation queries the response was YES. Maximal size of possible extension queue 949. Compared 269393 event pairs, 27447 based on Foata normal form. 0/42012 useless extension candidates. Maximal degree in co-relation 129920. Up to 41994 conditions per place. [2023-09-01 01:35:16,956 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 57 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-09-01 01:35:16,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 60 transitions, 471 flow [2023-09-01 01:35:16,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:35:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:35:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1518 transitions. [2023-09-01 01:35:16,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40052770448548813 [2023-09-01 01:35:16,959 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1518 transitions. [2023-09-01 01:35:16,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1518 transitions. [2023-09-01 01:35:16,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:35:16,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1518 transitions. [2023-09-01 01:35:16,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 303.6) internal successors, (1518), 5 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:16,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:16,962 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:16,962 INFO L175 Difference]: Start difference. First operand has 94 places, 61 transitions, 357 flow. Second operand 5 states and 1518 transitions. [2023-09-01 01:35:16,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 60 transitions, 471 flow [2023-09-01 01:35:17,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 60 transitions, 460 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:35:17,079 INFO L231 Difference]: Finished difference. Result has 91 places, 60 transitions, 346 flow [2023-09-01 01:35:17,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=91, PETRI_TRANSITIONS=60} [2023-09-01 01:35:17,080 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 26 predicate places. [2023-09-01 01:35:17,080 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 60 transitions, 346 flow [2023-09-01 01:35:17,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 299.3333333333333) internal successors, (1796), 6 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:35:17,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:35:17,080 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:35:17,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2023-09-01 01:35:17,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:35:17,281 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:35:17,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:35:17,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2008247381, now seen corresponding path program 2 times [2023-09-01 01:35:17,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:35:17,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518124609] [2023-09-01 01:35:17,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:35:17,282 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 [2023-09-01 01:35:17,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:35:17,283 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:35:17,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-09-01 01:35:17,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:35:17,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:35:17,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 01:35:17,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:35:17,872 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:35:17,873 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 42 [2023-09-01 01:35:17,975 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 01:35:17,975 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 [2023-09-01 01:35:18,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:35:18,051 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 [2023-09-01 01:35:18,067 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 01:35:18,067 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 [2023-09-01 01:35:18,310 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:35:18,310 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 12 treesize of output 18 [2023-09-01 01:35:18,331 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-09-01 01:35:18,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 01:35:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:35:18,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:35:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:35:21,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:35:21,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518124609] [2023-09-01 01:35:21,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518124609] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:35:21,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:35:21,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2023-09-01 01:35:21,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678662470] [2023-09-01 01:35:21,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:35:21,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 01:35:21,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:35:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 01:35:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=274, Unknown=1, NotChecked=0, Total=342 [2023-09-01 01:35:22,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:27,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:29,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:31,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:37,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:39,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:42,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:44,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:46,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:48,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:49,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:52,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:54,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:57,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:35:59,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:02,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:04,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:06,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:08,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:11,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:13,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:16,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:19,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:23,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:27,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:36:33,857 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] [2023-09-01 01:36:34,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 758 [2023-09-01 01:36:34,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 60 transitions, 346 flow. Second operand has 19 states, 19 states have (on average 273.10526315789474) internal successors, (5189), 19 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:34,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:36:34,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 758 [2023-09-01 01:36:34,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:36:42,009 INFO L130 PetriNetUnfolder]: 33705/49452 cut-off events. [2023-09-01 01:36:42,009 INFO L131 PetriNetUnfolder]: For 64565/64565 co-relation queries the response was YES. [2023-09-01 01:36:42,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147786 conditions, 49452 events. 33705/49452 cut-off events. For 64565/64565 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 326238 event pairs, 5915 based on Foata normal form. 716/50168 useless extension candidates. Maximal degree in co-relation 147754. Up to 9890 conditions per place. [2023-09-01 01:36:42,574 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 224 selfloop transitions, 10 changer transitions 0/234 dead transitions. [2023-09-01 01:36:42,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 234 transitions, 1662 flow [2023-09-01 01:36:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:36:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:36:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2856 transitions. [2023-09-01 01:36:42,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37678100263852243 [2023-09-01 01:36:42,577 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2856 transitions. [2023-09-01 01:36:42,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2856 transitions. [2023-09-01 01:36:42,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:36:42,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2856 transitions. [2023-09-01 01:36:42,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 285.6) internal successors, (2856), 10 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:42,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:42,585 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:42,585 INFO L175 Difference]: Start difference. First operand has 91 places, 60 transitions, 346 flow. Second operand 10 states and 2856 transitions. [2023-09-01 01:36:42,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 234 transitions, 1662 flow [2023-09-01 01:36:42,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 234 transitions, 1657 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:36:42,979 INFO L231 Difference]: Finished difference. Result has 99 places, 62 transitions, 386 flow [2023-09-01 01:36:42,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=386, PETRI_PLACES=99, PETRI_TRANSITIONS=62} [2023-09-01 01:36:42,979 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2023-09-01 01:36:42,980 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 62 transitions, 386 flow [2023-09-01 01:36:42,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 273.10526315789474) internal successors, (5189), 19 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:42,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:36:42,981 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:36:42,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2023-09-01 01:36:43,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:36:43,181 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:36:43,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:36:43,182 INFO L85 PathProgramCache]: Analyzing trace with hash -845087589, now seen corresponding path program 3 times [2023-09-01 01:36:43,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:36:43,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937326982] [2023-09-01 01:36:43,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:36:43,182 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 [2023-09-01 01:36:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:36:43,183 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:36:43,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2023-09-01 01:36:44,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 01:36:44,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:36:44,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:36:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:36:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:36:44,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:36:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:36:44,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:36:44,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937326982] [2023-09-01 01:36:44,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937326982] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:36:44,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:36:44,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 01:36:44,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866273658] [2023-09-01 01:36:44,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:36:44,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:36:44,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:36:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:36:44,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:36:44,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 758 [2023-09-01 01:36:44,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 62 transitions, 386 flow. Second operand has 14 states, 14 states have (on average 321.2857142857143) internal successors, (4498), 14 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:44,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:36:44,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 758 [2023-09-01 01:36:44,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:36:51,522 INFO L130 PetriNetUnfolder]: 30459/45082 cut-off events. [2023-09-01 01:36:51,522 INFO L131 PetriNetUnfolder]: For 80395/80395 co-relation queries the response was YES. [2023-09-01 01:36:51,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138682 conditions, 45082 events. 30459/45082 cut-off events. For 80395/80395 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 300110 event pairs, 753 based on Foata normal form. 1124/46206 useless extension candidates. Maximal degree in co-relation 138648. Up to 7604 conditions per place. [2023-09-01 01:36:51,817 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 235 selfloop transitions, 6 changer transitions 0/241 dead transitions. [2023-09-01 01:36:51,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 241 transitions, 1781 flow [2023-09-01 01:36:51,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:36:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:36:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2706 transitions. [2023-09-01 01:36:51,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462401055408971 [2023-09-01 01:36:51,820 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2706 transitions. [2023-09-01 01:36:51,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2706 transitions. [2023-09-01 01:36:51,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:36:51,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2706 transitions. [2023-09-01 01:36:51,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 338.25) internal successors, (2706), 8 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:51,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:51,827 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:51,827 INFO L175 Difference]: Start difference. First operand has 99 places, 62 transitions, 386 flow. Second operand 8 states and 2706 transitions. [2023-09-01 01:36:51,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 241 transitions, 1781 flow [2023-09-01 01:36:52,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 241 transitions, 1665 flow, removed 14 selfloop flow, removed 13 redundant places. [2023-09-01 01:36:52,080 INFO L231 Difference]: Finished difference. Result has 91 places, 59 transitions, 336 flow [2023-09-01 01:36:52,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=91, PETRI_TRANSITIONS=59} [2023-09-01 01:36:52,081 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 26 predicate places. [2023-09-01 01:36:52,081 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 59 transitions, 336 flow [2023-09-01 01:36:52,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 321.2857142857143) internal successors, (4498), 14 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:52,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:36:52,082 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:36:52,095 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 (37)] Ended with exit code 0 [2023-09-01 01:36:52,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:36:52,282 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:36:52,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:36:52,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1485307128, now seen corresponding path program 3 times [2023-09-01 01:36:52,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:36:52,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935740826] [2023-09-01 01:36:52,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:36:52,283 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 [2023-09-01 01:36:52,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:36:52,284 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:36:52,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-09-01 01:36:53,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 01:36:53,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:36:53,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 01:36:53,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:36:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:36:53,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:36:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:36:53,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:36:53,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935740826] [2023-09-01 01:36:53,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935740826] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:36:53,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:36:53,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-09-01 01:36:53,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303242906] [2023-09-01 01:36:53,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:36:53,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 01:36:53,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:36:53,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 01:36:53,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:36:53,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 758 [2023-09-01 01:36:53,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 59 transitions, 336 flow. Second operand has 14 states, 14 states have (on average 321.42857142857144) internal successors, (4500), 14 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:36:53,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:36:53,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 758 [2023-09-01 01:36:53,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:36:59,921 INFO L130 PetriNetUnfolder]: 26843/40146 cut-off events. [2023-09-01 01:36:59,922 INFO L131 PetriNetUnfolder]: For 37520/37520 co-relation queries the response was YES. [2023-09-01 01:37:00,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113800 conditions, 40146 events. 26843/40146 cut-off events. For 37520/37520 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 266763 event pairs, 853 based on Foata normal form. 1320/41466 useless extension candidates. Maximal degree in co-relation 113773. Up to 6786 conditions per place. [2023-09-01 01:37:00,140 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 204 selfloop transitions, 6 changer transitions 0/210 dead transitions. [2023-09-01 01:37:00,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 210 transitions, 1368 flow [2023-09-01 01:37:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:37:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:37:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2689 transitions. [2023-09-01 01:37:00,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434366754617414 [2023-09-01 01:37:00,143 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2689 transitions. [2023-09-01 01:37:00,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2689 transitions. [2023-09-01 01:37:00,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:00,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2689 transitions. [2023-09-01 01:37:00,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 336.125) internal successors, (2689), 8 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:00,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:00,149 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:00,149 INFO L175 Difference]: Start difference. First operand has 91 places, 59 transitions, 336 flow. Second operand 8 states and 2689 transitions. [2023-09-01 01:37:00,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 210 transitions, 1368 flow [2023-09-01 01:37:00,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 210 transitions, 1276 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-09-01 01:37:00,478 INFO L231 Difference]: Finished difference. Result has 84 places, 56 transitions, 292 flow [2023-09-01 01:37:00,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=84, PETRI_TRANSITIONS=56} [2023-09-01 01:37:00,479 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2023-09-01 01:37:00,479 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 56 transitions, 292 flow [2023-09-01 01:37:00,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 321.42857142857144) internal successors, (4500), 14 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:00,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:00,480 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:37:00,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2023-09-01 01:37:00,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:00,680 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:00,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:00,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2146159944, now seen corresponding path program 1 times [2023-09-01 01:37:00,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:00,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816193230] [2023-09-01 01:37:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:37:00,681 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 [2023-09-01 01:37:00,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:00,682 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:37:00,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2023-09-01 01:37:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:37:01,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:37:01,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:01,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:01,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:01,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816193230] [2023-09-01 01:37:01,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816193230] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:01,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:01,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:37:01,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999367740] [2023-09-01 01:37:01,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:01,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:37:01,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:01,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:37:01,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:37:01,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 758 [2023-09-01 01:37:01,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 56 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 323.25) internal successors, (1293), 4 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:01,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:01,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 758 [2023-09-01 01:37:01,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:06,056 INFO L130 PetriNetUnfolder]: 26759/40062 cut-off events. [2023-09-01 01:37:06,056 INFO L131 PetriNetUnfolder]: For 30362/30362 co-relation queries the response was YES. [2023-09-01 01:37:06,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110352 conditions, 40062 events. 26759/40062 cut-off events. For 30362/30362 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 267310 event pairs, 22285 based on Foata normal form. 84/40146 useless extension candidates. Maximal degree in co-relation 110330. Up to 33375 conditions per place. [2023-09-01 01:37:06,299 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 98 selfloop transitions, 3 changer transitions 4/105 dead transitions. [2023-09-01 01:37:06,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 105 transitions, 710 flow [2023-09-01 01:37:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:37:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:37:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1331 transitions. [2023-09-01 01:37:06,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43898416886543534 [2023-09-01 01:37:06,301 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1331 transitions. [2023-09-01 01:37:06,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1331 transitions. [2023-09-01 01:37:06,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:06,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1331 transitions. [2023-09-01 01:37:06,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 332.75) internal successors, (1331), 4 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:06,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:06,304 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:06,304 INFO L175 Difference]: Start difference. First operand has 84 places, 56 transitions, 292 flow. Second operand 4 states and 1331 transitions. [2023-09-01 01:37:06,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 105 transitions, 710 flow [2023-09-01 01:37:06,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 105 transitions, 677 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:37:06,564 INFO L231 Difference]: Finished difference. Result has 83 places, 57 transitions, 297 flow [2023-09-01 01:37:06,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=297, PETRI_PLACES=83, PETRI_TRANSITIONS=57} [2023-09-01 01:37:06,564 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 18 predicate places. [2023-09-01 01:37:06,564 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 57 transitions, 297 flow [2023-09-01 01:37:06,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 323.25) internal successors, (1293), 4 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:06,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:06,565 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:37:06,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2023-09-01 01:37:06,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:06,765 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:06,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:06,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1337720490, now seen corresponding path program 2 times [2023-09-01 01:37:06,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:06,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271331450] [2023-09-01 01:37:06,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:37:06,766 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 [2023-09-01 01:37:06,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:06,767 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 01:37:06,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2023-09-01 01:37:06,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:37:06,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:37:07,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:07,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:07,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:07,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271331450] [2023-09-01 01:37:07,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271331450] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:07,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:07,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:37:07,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412605615] [2023-09-01 01:37:07,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:07,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:37:07,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:37:07,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:37:07,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 758 [2023-09-01 01:37:07,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 57 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 311.1666666666667) internal successors, (1867), 6 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:07,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:07,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 758 [2023-09-01 01:37:07,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:12,469 INFO L130 PetriNetUnfolder]: 27355/40940 cut-off events. [2023-09-01 01:37:12,469 INFO L131 PetriNetUnfolder]: For 28616/28616 co-relation queries the response was YES. [2023-09-01 01:37:12,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115254 conditions, 40940 events. 27355/40940 cut-off events. For 28616/28616 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 274290 event pairs, 22201 based on Foata normal form. 66/41006 useless extension candidates. Maximal degree in co-relation 115230. Up to 33339 conditions per place. [2023-09-01 01:37:12,711 INFO L137 encePairwiseOnDemand]: 751/758 looper letters, 129 selfloop transitions, 10 changer transitions 20/159 dead transitions. [2023-09-01 01:37:12,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 159 transitions, 1072 flow [2023-09-01 01:37:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:37:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:37:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2246 transitions. [2023-09-01 01:37:12,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232943837165473 [2023-09-01 01:37:12,713 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2246 transitions. [2023-09-01 01:37:12,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2246 transitions. [2023-09-01 01:37:12,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:12,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2246 transitions. [2023-09-01 01:37:12,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 320.85714285714283) internal successors, (2246), 7 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:12,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:12,718 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:12,718 INFO L175 Difference]: Start difference. First operand has 83 places, 57 transitions, 297 flow. Second operand 7 states and 2246 transitions. [2023-09-01 01:37:12,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 159 transitions, 1072 flow [2023-09-01 01:37:12,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 159 transitions, 1048 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:37:12,836 INFO L231 Difference]: Finished difference. Result has 92 places, 65 transitions, 373 flow [2023-09-01 01:37:12,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=373, PETRI_PLACES=92, PETRI_TRANSITIONS=65} [2023-09-01 01:37:12,837 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 27 predicate places. [2023-09-01 01:37:12,837 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 65 transitions, 373 flow [2023-09-01 01:37:12,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 311.1666666666667) internal successors, (1867), 6 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:12,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:12,838 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:37:12,846 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 (40)] Forceful destruction successful, exit code 0 [2023-09-01 01:37:13,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:13,041 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:13,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:13,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1772894812, now seen corresponding path program 3 times [2023-09-01 01:37:13,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:13,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886865195] [2023-09-01 01:37:13,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:37:13,042 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 [2023-09-01 01:37:13,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:13,043 INFO L229 MonitoredProcess]: Starting monitored process 41 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) [2023-09-01 01:37:13,047 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 (41)] Waiting until timeout for monitored process [2023-09-01 01:37:13,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 01:37:13,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:13,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:37:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:13,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:13,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886865195] [2023-09-01 01:37:13,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886865195] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:13,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:13,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:37:13,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986835780] [2023-09-01 01:37:13,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:13,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:37:13,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:13,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:37:13,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:37:13,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 758 [2023-09-01 01:37:13,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 65 transitions, 373 flow. Second operand has 4 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:13,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:13,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 758 [2023-09-01 01:37:13,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:19,016 INFO L130 PetriNetUnfolder]: 28250/42147 cut-off events. [2023-09-01 01:37:19,016 INFO L131 PetriNetUnfolder]: For 64819/64819 co-relation queries the response was YES. [2023-09-01 01:37:19,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141569 conditions, 42147 events. 28250/42147 cut-off events. For 64819/64819 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 279814 event pairs, 22372 based on Foata normal form. 438/42585 useless extension candidates. Maximal degree in co-relation 141540. Up to 33874 conditions per place. [2023-09-01 01:37:19,250 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 126 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2023-09-01 01:37:19,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 131 transitions, 988 flow [2023-09-01 01:37:19,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:37:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:37:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1325 transitions. [2023-09-01 01:37:19,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43700527704485487 [2023-09-01 01:37:19,252 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1325 transitions. [2023-09-01 01:37:19,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1325 transitions. [2023-09-01 01:37:19,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:19,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1325 transitions. [2023-09-01 01:37:19,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 331.25) internal successors, (1325), 4 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:19,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:19,254 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:19,254 INFO L175 Difference]: Start difference. First operand has 92 places, 65 transitions, 373 flow. Second operand 4 states and 1325 transitions. [2023-09-01 01:37:19,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 131 transitions, 988 flow [2023-09-01 01:37:19,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 957 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-09-01 01:37:19,432 INFO L231 Difference]: Finished difference. Result has 94 places, 68 transitions, 410 flow [2023-09-01 01:37:19,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=410, PETRI_PLACES=94, PETRI_TRANSITIONS=68} [2023-09-01 01:37:19,433 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 29 predicate places. [2023-09-01 01:37:19,433 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 68 transitions, 410 flow [2023-09-01 01:37:19,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:19,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:19,433 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:37:19,443 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 (41)] Forceful destruction successful, exit code 0 [2023-09-01 01:37:19,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:19,634 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:19,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:19,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1702911230, now seen corresponding path program 4 times [2023-09-01 01:37:19,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:19,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719769461] [2023-09-01 01:37:19,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:37:19,635 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 [2023-09-01 01:37:19,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:19,636 INFO L229 MonitoredProcess]: Starting monitored process 42 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) [2023-09-01 01:37:19,639 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 (42)] Waiting until timeout for monitored process [2023-09-01 01:37:19,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:37:19,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:37:19,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:20,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:20,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719769461] [2023-09-01 01:37:20,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719769461] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:20,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:20,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:37:20,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960046057] [2023-09-01 01:37:20,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:20,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:37:20,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:37:20,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:37:20,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 758 [2023-09-01 01:37:20,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 68 transitions, 410 flow. Second operand has 4 states, 4 states have (on average 322.25) internal successors, (1289), 4 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:20,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:20,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 758 [2023-09-01 01:37:20,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:25,472 INFO L130 PetriNetUnfolder]: 27292/40533 cut-off events. [2023-09-01 01:37:25,472 INFO L131 PetriNetUnfolder]: For 67868/67868 co-relation queries the response was YES. [2023-09-01 01:37:25,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141021 conditions, 40533 events. 27292/40533 cut-off events. For 67868/67868 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 270906 event pairs, 2849 based on Foata normal form. 438/40971 useless extension candidates. Maximal degree in co-relation 140990. Up to 33591 conditions per place. [2023-09-01 01:37:25,785 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 107 selfloop transitions, 8 changer transitions 2/117 dead transitions. [2023-09-01 01:37:25,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 117 transitions, 917 flow [2023-09-01 01:37:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:37:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:37:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1317 transitions. [2023-09-01 01:37:25,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43436675461741425 [2023-09-01 01:37:25,788 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1317 transitions. [2023-09-01 01:37:25,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1317 transitions. [2023-09-01 01:37:25,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:25,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1317 transitions. [2023-09-01 01:37:25,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 329.25) internal successors, (1317), 4 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:25,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:25,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:25,791 INFO L175 Difference]: Start difference. First operand has 94 places, 68 transitions, 410 flow. Second operand 4 states and 1317 transitions. [2023-09-01 01:37:25,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 117 transitions, 917 flow [2023-09-01 01:37:25,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 117 transitions, 904 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 01:37:25,973 INFO L231 Difference]: Finished difference. Result has 98 places, 69 transitions, 440 flow [2023-09-01 01:37:25,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=440, PETRI_PLACES=98, PETRI_TRANSITIONS=69} [2023-09-01 01:37:25,973 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-09-01 01:37:25,973 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 69 transitions, 440 flow [2023-09-01 01:37:25,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.25) internal successors, (1289), 4 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:25,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:25,974 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:37:25,984 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 (42)] Forceful destruction successful, exit code 0 [2023-09-01 01:37:26,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:26,175 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:26,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:26,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1932985171, now seen corresponding path program 1 times [2023-09-01 01:37:26,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:26,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552537709] [2023-09-01 01:37:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:37:26,176 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 [2023-09-01 01:37:26,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:26,177 INFO L229 MonitoredProcess]: Starting monitored process 43 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) [2023-09-01 01:37:26,179 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 (43)] Waiting until timeout for monitored process [2023-09-01 01:37:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:37:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:37:26,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:26,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:26,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:26,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552537709] [2023-09-01 01:37:26,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552537709] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:26,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:26,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:37:26,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589106738] [2023-09-01 01:37:26,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:26,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:37:26,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:37:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:37:26,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 758 [2023-09-01 01:37:26,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 69 transitions, 440 flow. Second operand has 6 states, 6 states have (on average 310.5) internal successors, (1863), 6 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:26,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:26,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 758 [2023-09-01 01:37:26,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:32,490 INFO L130 PetriNetUnfolder]: 27281/40559 cut-off events. [2023-09-01 01:37:32,490 INFO L131 PetriNetUnfolder]: For 77494/77494 co-relation queries the response was YES. [2023-09-01 01:37:32,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142065 conditions, 40559 events. 27281/40559 cut-off events. For 77494/77494 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 265160 event pairs, 22966 based on Foata normal form. 53/40612 useless extension candidates. Maximal degree in co-relation 142031. Up to 35670 conditions per place. [2023-09-01 01:37:32,755 INFO L137 encePairwiseOnDemand]: 750/758 looper letters, 113 selfloop transitions, 10 changer transitions 4/127 dead transitions. [2023-09-01 01:37:32,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 127 transitions, 1029 flow [2023-09-01 01:37:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:37:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:37:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1601 transitions. [2023-09-01 01:37:32,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224274406332454 [2023-09-01 01:37:32,757 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1601 transitions. [2023-09-01 01:37:32,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1601 transitions. [2023-09-01 01:37:32,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:32,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1601 transitions. [2023-09-01 01:37:32,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.2) internal successors, (1601), 5 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:32,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:32,762 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:32,762 INFO L175 Difference]: Start difference. First operand has 98 places, 69 transitions, 440 flow. Second operand 5 states and 1601 transitions. [2023-09-01 01:37:32,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 127 transitions, 1029 flow [2023-09-01 01:37:33,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 127 transitions, 991 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-09-01 01:37:33,006 INFO L231 Difference]: Finished difference. Result has 98 places, 70 transitions, 453 flow [2023-09-01 01:37:33,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=98, PETRI_TRANSITIONS=70} [2023-09-01 01:37:33,006 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-09-01 01:37:33,006 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 70 transitions, 453 flow [2023-09-01 01:37:33,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 310.5) internal successors, (1863), 6 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:33,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:33,007 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:37:33,019 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 (43)] Forceful destruction successful, exit code 0 [2023-09-01 01:37:33,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:33,211 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:33,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:33,212 INFO L85 PathProgramCache]: Analyzing trace with hash -774464335, now seen corresponding path program 2 times [2023-09-01 01:37:33,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:33,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82072584] [2023-09-01 01:37:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:37:33,213 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 [2023-09-01 01:37:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:33,214 INFO L229 MonitoredProcess]: Starting monitored process 44 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) [2023-09-01 01:37:33,217 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 (44)] Waiting until timeout for monitored process [2023-09-01 01:37:33,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:37:33,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:33,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:37:33,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 01:37:33,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:33,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:33,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82072584] [2023-09-01 01:37:33,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82072584] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:33,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:33,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:37:33,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433733359] [2023-09-01 01:37:33,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:33,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:37:33,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:33,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:37:33,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:37:33,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 758 [2023-09-01 01:37:33,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 70 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 311.5) internal successors, (1869), 6 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:33,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:33,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 758 [2023-09-01 01:37:33,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:39,708 INFO L130 PetriNetUnfolder]: 27397/40902 cut-off events. [2023-09-01 01:37:39,708 INFO L131 PetriNetUnfolder]: For 79420/79420 co-relation queries the response was YES. [2023-09-01 01:37:40,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147054 conditions, 40902 events. 27397/40902 cut-off events. For 79420/79420 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 269699 event pairs, 21487 based on Foata normal form. 58/40960 useless extension candidates. Maximal degree in co-relation 147021. Up to 33877 conditions per place. [2023-09-01 01:37:40,160 INFO L137 encePairwiseOnDemand]: 750/758 looper letters, 136 selfloop transitions, 14 changer transitions 22/172 dead transitions. [2023-09-01 01:37:40,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 172 transitions, 1365 flow [2023-09-01 01:37:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:37:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:37:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2246 transitions. [2023-09-01 01:37:40,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232943837165473 [2023-09-01 01:37:40,164 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2246 transitions. [2023-09-01 01:37:40,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2246 transitions. [2023-09-01 01:37:40,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:40,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2246 transitions. [2023-09-01 01:37:40,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 320.85714285714283) internal successors, (2246), 7 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:40,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:40,170 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:40,170 INFO L175 Difference]: Start difference. First operand has 98 places, 70 transitions, 453 flow. Second operand 7 states and 2246 transitions. [2023-09-01 01:37:40,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 172 transitions, 1365 flow [2023-09-01 01:37:40,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 172 transitions, 1329 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 01:37:40,409 INFO L231 Difference]: Finished difference. Result has 106 places, 77 transitions, 542 flow [2023-09-01 01:37:40,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=106, PETRI_TRANSITIONS=77} [2023-09-01 01:37:40,410 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-09-01 01:37:40,410 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 77 transitions, 542 flow [2023-09-01 01:37:40,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 311.5) internal successors, (1869), 6 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:40,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:40,411 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:37:40,422 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 (44)] Ended with exit code 0 [2023-09-01 01:37:40,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:40,622 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:40,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:40,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1264076813, now seen corresponding path program 3 times [2023-09-01 01:37:40,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:40,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597727740] [2023-09-01 01:37:40,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:37:40,624 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 [2023-09-01 01:37:40,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:40,625 INFO L229 MonitoredProcess]: Starting monitored process 45 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) [2023-09-01 01:37:40,630 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 (45)] Waiting until timeout for monitored process [2023-09-01 01:37:40,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:37:40,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:40,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:37:40,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:41,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:37:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:37:41,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:41,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597727740] [2023-09-01 01:37:41,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597727740] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:37:41,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:37:41,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-09-01 01:37:41,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049601343] [2023-09-01 01:37:41,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:37:41,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 01:37:41,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:41,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 01:37:41,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 01:37:41,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-09-01 01:37:41,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 77 transitions, 542 flow. Second operand has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:41,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:41,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-09-01 01:37:41,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:47,428 INFO L130 PetriNetUnfolder]: 27322/40653 cut-off events. [2023-09-01 01:37:47,428 INFO L131 PetriNetUnfolder]: For 139702/139702 co-relation queries the response was YES. [2023-09-01 01:37:47,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162836 conditions, 40653 events. 27322/40653 cut-off events. For 139702/139702 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 270577 event pairs, 7022 based on Foata normal form. 111/40764 useless extension candidates. Maximal degree in co-relation 162798. Up to 11684 conditions per place. [2023-09-01 01:37:47,669 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 219 selfloop transitions, 9 changer transitions 129/357 dead transitions. [2023-09-01 01:37:47,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 357 transitions, 3215 flow [2023-09-01 01:37:47,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:37:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:37:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2950 transitions. [2023-09-01 01:37:47,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43242450894165935 [2023-09-01 01:37:47,672 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2950 transitions. [2023-09-01 01:37:47,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2950 transitions. [2023-09-01 01:37:47,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:47,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2950 transitions. [2023-09-01 01:37:47,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 327.77777777777777) internal successors, (2950), 9 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:47,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 758.0) internal successors, (7580), 10 states have internal predecessors, (7580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:47,676 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 758.0) internal successors, (7580), 10 states have internal predecessors, (7580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:47,676 INFO L175 Difference]: Start difference. First operand has 106 places, 77 transitions, 542 flow. Second operand 9 states and 2950 transitions. [2023-09-01 01:37:47,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 357 transitions, 3215 flow [2023-09-01 01:37:47,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 357 transitions, 3059 flow, removed 49 selfloop flow, removed 2 redundant places. [2023-09-01 01:37:47,831 INFO L231 Difference]: Finished difference. Result has 117 places, 77 transitions, 558 flow [2023-09-01 01:37:47,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=558, PETRI_PLACES=117, PETRI_TRANSITIONS=77} [2023-09-01 01:37:47,831 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 52 predicate places. [2023-09-01 01:37:47,831 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 77 transitions, 558 flow [2023-09-01 01:37:47,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:47,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:47,832 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:37:47,841 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 (45)] Forceful destruction successful, exit code 0 [2023-09-01 01:37:48,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:48,032 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:48,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:48,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1942417186, now seen corresponding path program 4 times [2023-09-01 01:37:48,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:48,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759752765] [2023-09-01 01:37:48,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:37:48,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:48,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:48,034 INFO L229 MonitoredProcess]: Starting monitored process 46 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) [2023-09-01 01:37:48,035 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 (46)] Waiting until timeout for monitored process [2023-09-01 01:37:48,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:37:48,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:48,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:37:48,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-09-01 01:37:48,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:37:48,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:48,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759752765] [2023-09-01 01:37:48,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759752765] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:37:48,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:37:48,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:37:48,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276049121] [2023-09-01 01:37:48,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:37:48,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:37:48,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:48,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:37:48,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:37:48,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 758 [2023-09-01 01:37:48,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 77 transitions, 558 flow. Second operand has 6 states, 6 states have (on average 310.5) internal successors, (1863), 6 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:48,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:48,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 758 [2023-09-01 01:37:48,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:37:53,422 INFO L130 PetriNetUnfolder]: 20541/30240 cut-off events. [2023-09-01 01:37:53,422 INFO L131 PetriNetUnfolder]: For 124686/124686 co-relation queries the response was YES. [2023-09-01 01:37:53,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132425 conditions, 30240 events. 20541/30240 cut-off events. For 124686/124686 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 184754 event pairs, 15877 based on Foata normal form. 42/30282 useless extension candidates. Maximal degree in co-relation 132381. Up to 24581 conditions per place. [2023-09-01 01:37:53,754 INFO L137 encePairwiseOnDemand]: 751/758 looper letters, 105 selfloop transitions, 11 changer transitions 19/135 dead transitions. [2023-09-01 01:37:53,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 135 transitions, 1241 flow [2023-09-01 01:37:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:37:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:37:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1604 transitions. [2023-09-01 01:37:53,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42321899736147756 [2023-09-01 01:37:53,759 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1604 transitions. [2023-09-01 01:37:53,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1604 transitions. [2023-09-01 01:37:53,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:37:53,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1604 transitions. [2023-09-01 01:37:53,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.8) internal successors, (1604), 5 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:53,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:53,763 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:53,763 INFO L175 Difference]: Start difference. First operand has 117 places, 77 transitions, 558 flow. Second operand 5 states and 1604 transitions. [2023-09-01 01:37:53,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 135 transitions, 1241 flow [2023-09-01 01:37:54,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 135 transitions, 1161 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-09-01 01:37:54,027 INFO L231 Difference]: Finished difference. Result has 111 places, 74 transitions, 538 flow [2023-09-01 01:37:54,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=538, PETRI_PLACES=111, PETRI_TRANSITIONS=74} [2023-09-01 01:37:54,028 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 46 predicate places. [2023-09-01 01:37:54,028 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 74 transitions, 538 flow [2023-09-01 01:37:54,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 310.5) internal successors, (1863), 6 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:54,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:37:54,028 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:37:54,041 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 (46)] Forceful destruction successful, exit code 0 [2023-09-01 01:37:54,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:37:54,233 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:37:54,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:37:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -696483112, now seen corresponding path program 5 times [2023-09-01 01:37:54,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:37:54,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328960700] [2023-09-01 01:37:54,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:37:54,234 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 [2023-09-01 01:37:54,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:37:54,235 INFO L229 MonitoredProcess]: Starting monitored process 47 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) [2023-09-01 01:37:54,237 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 (47)] Waiting until timeout for monitored process [2023-09-01 01:37:55,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-09-01 01:37:55,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:37:55,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 01:37:55,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:37:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-09-01 01:37:55,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:37:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-09-01 01:37:55,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:37:55,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328960700] [2023-09-01 01:37:55,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328960700] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:37:55,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:37:55,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-09-01 01:37:55,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776516340] [2023-09-01 01:37:55,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:37:55,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:37:55,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:37:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:37:55,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:37:55,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 758 [2023-09-01 01:37:55,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 74 transitions, 538 flow. Second operand has 10 states, 10 states have (on average 307.7) internal successors, (3077), 10 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:37:55,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:37:55,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 758 [2023-09-01 01:37:55,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:00,690 INFO L130 PetriNetUnfolder]: 20351/29930 cut-off events. [2023-09-01 01:38:00,690 INFO L131 PetriNetUnfolder]: For 115247/115247 co-relation queries the response was YES. [2023-09-01 01:38:00,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128097 conditions, 29930 events. 20351/29930 cut-off events. For 115247/115247 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 184813 event pairs, 5815 based on Foata normal form. 38/29968 useless extension candidates. Maximal degree in co-relation 128055. Up to 24983 conditions per place. [2023-09-01 01:38:00,902 INFO L137 encePairwiseOnDemand]: 747/758 looper letters, 159 selfloop transitions, 21 changer transitions 20/200 dead transitions. [2023-09-01 01:38:00,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 200 transitions, 1786 flow [2023-09-01 01:38:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:38:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:38:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3139 transitions. [2023-09-01 01:38:00,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4141160949868074 [2023-09-01 01:38:00,905 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3139 transitions. [2023-09-01 01:38:00,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3139 transitions. [2023-09-01 01:38:00,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:00,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3139 transitions. [2023-09-01 01:38:00,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 313.9) internal successors, (3139), 10 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:00,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:00,910 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:00,910 INFO L175 Difference]: Start difference. First operand has 111 places, 74 transitions, 538 flow. Second operand 10 states and 3139 transitions. [2023-09-01 01:38:00,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 200 transitions, 1786 flow [2023-09-01 01:38:01,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 200 transitions, 1750 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-09-01 01:38:01,355 INFO L231 Difference]: Finished difference. Result has 117 places, 78 transitions, 627 flow [2023-09-01 01:38:01,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=627, PETRI_PLACES=117, PETRI_TRANSITIONS=78} [2023-09-01 01:38:01,355 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 52 predicate places. [2023-09-01 01:38:01,355 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 78 transitions, 627 flow [2023-09-01 01:38:01,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 307.7) internal successors, (3077), 10 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:01,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:01,356 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:38:01,371 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 (47)] Forceful destruction successful, exit code 0 [2023-09-01 01:38:01,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:01,561 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:01,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1018143039, now seen corresponding path program 1 times [2023-09-01 01:38:01,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:01,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839386999] [2023-09-01 01:38:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:38:01,562 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 [2023-09-01 01:38:01,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:01,563 INFO L229 MonitoredProcess]: Starting monitored process 48 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) [2023-09-01 01:38:01,563 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 (48)] Waiting until timeout for monitored process [2023-09-01 01:38:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:38:02,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:38:02,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-09-01 01:38:02,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:38:02,093 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:02,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839386999] [2023-09-01 01:38:02,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839386999] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:38:02,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:38:02,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:38:02,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673565447] [2023-09-01 01:38:02,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:38:02,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:38:02,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:38:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:38:02,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-09-01 01:38:02,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 78 transitions, 627 flow. Second operand has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:02,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:02,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-09-01 01:38:02,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:06,950 INFO L130 PetriNetUnfolder]: 21025/30844 cut-off events. [2023-09-01 01:38:06,951 INFO L131 PetriNetUnfolder]: For 137852/137852 co-relation queries the response was YES. [2023-09-01 01:38:07,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136479 conditions, 30844 events. 21025/30844 cut-off events. For 137852/137852 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 185268 event pairs, 15899 based on Foata normal form. 360/31204 useless extension candidates. Maximal degree in co-relation 136434. Up to 24545 conditions per place. [2023-09-01 01:38:07,125 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 145 selfloop transitions, 16 changer transitions 2/163 dead transitions. [2023-09-01 01:38:07,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 163 transitions, 1534 flow [2023-09-01 01:38:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:38:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:38:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1955 transitions. [2023-09-01 01:38:07,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298592788038698 [2023-09-01 01:38:07,127 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1955 transitions. [2023-09-01 01:38:07,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1955 transitions. [2023-09-01 01:38:07,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:07,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1955 transitions. [2023-09-01 01:38:07,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 325.8333333333333) internal successors, (1955), 6 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:07,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:07,130 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:07,130 INFO L175 Difference]: Start difference. First operand has 117 places, 78 transitions, 627 flow. Second operand 6 states and 1955 transitions. [2023-09-01 01:38:07,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 163 transitions, 1534 flow [2023-09-01 01:38:07,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 163 transitions, 1472 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-09-01 01:38:07,749 INFO L231 Difference]: Finished difference. Result has 119 places, 83 transitions, 704 flow [2023-09-01 01:38:07,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=704, PETRI_PLACES=119, PETRI_TRANSITIONS=83} [2023-09-01 01:38:07,750 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 54 predicate places. [2023-09-01 01:38:07,750 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 83 transitions, 704 flow [2023-09-01 01:38:07,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:07,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:07,751 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:38:07,764 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 (48)] Forceful destruction successful, exit code 0 [2023-09-01 01:38:07,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:07,961 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:07,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:07,961 INFO L85 PathProgramCache]: Analyzing trace with hash -171053777, now seen corresponding path program 2 times [2023-09-01 01:38:07,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:07,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362597756] [2023-09-01 01:38:07,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:38:07,962 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 [2023-09-01 01:38:07,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:07,963 INFO L229 MonitoredProcess]: Starting monitored process 49 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) [2023-09-01 01:38:07,964 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 (49)] Waiting until timeout for monitored process [2023-09-01 01:38:08,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:38:08,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:38:08,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 01:38:08,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 01:38:08,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:38:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 01:38:08,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:08,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362597756] [2023-09-01 01:38:08,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362597756] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:38:08,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:38:08,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-09-01 01:38:08,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757238267] [2023-09-01 01:38:08,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 01:38:08,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:38:08,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:08,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:38:08,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:38:08,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-09-01 01:38:08,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 83 transitions, 704 flow. Second operand has 13 states, 13 states have (on average 315.84615384615387) internal successors, (4106), 13 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:08,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:08,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-09-01 01:38:08,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:14,591 INFO L130 PetriNetUnfolder]: 21025/30809 cut-off events. [2023-09-01 01:38:14,591 INFO L131 PetriNetUnfolder]: For 128059/128059 co-relation queries the response was YES. [2023-09-01 01:38:14,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132222 conditions, 30809 events. 21025/30809 cut-off events. For 128059/128059 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 189687 event pairs, 3430 based on Foata normal form. 35/30844 useless extension candidates. Maximal degree in co-relation 132175. Up to 6564 conditions per place. [2023-09-01 01:38:14,841 INFO L137 encePairwiseOnDemand]: 754/758 looper letters, 283 selfloop transitions, 8 changer transitions 47/338 dead transitions. [2023-09-01 01:38:14,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 338 transitions, 3689 flow [2023-09-01 01:38:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 01:38:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 01:38:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2613 transitions. [2023-09-01 01:38:14,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43090369393139843 [2023-09-01 01:38:14,844 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2613 transitions. [2023-09-01 01:38:14,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2613 transitions. [2023-09-01 01:38:14,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:14,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2613 transitions. [2023-09-01 01:38:14,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 326.625) internal successors, (2613), 8 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:14,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:14,848 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:14,848 INFO L175 Difference]: Start difference. First operand has 119 places, 83 transitions, 704 flow. Second operand 8 states and 2613 transitions. [2023-09-01 01:38:14,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 338 transitions, 3689 flow [2023-09-01 01:38:15,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 338 transitions, 3577 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-09-01 01:38:15,261 INFO L231 Difference]: Finished difference. Result has 127 places, 83 transitions, 710 flow [2023-09-01 01:38:15,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=710, PETRI_PLACES=127, PETRI_TRANSITIONS=83} [2023-09-01 01:38:15,261 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 62 predicate places. [2023-09-01 01:38:15,262 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 83 transitions, 710 flow [2023-09-01 01:38:15,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 315.84615384615387) internal successors, (4106), 13 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:15,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:15,262 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:38:15,279 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 (49)] Forceful destruction successful, exit code 0 [2023-09-01 01:38:15,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:15,477 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:15,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash 967447606, now seen corresponding path program 3 times [2023-09-01 01:38:15,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:15,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710359523] [2023-09-01 01:38:15,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:38:15,478 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 [2023-09-01 01:38:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:15,479 INFO L229 MonitoredProcess]: Starting monitored process 50 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) [2023-09-01 01:38:15,480 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 (50)] Waiting until timeout for monitored process [2023-09-01 01:38:16,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 01:38:16,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:38:16,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:38:16,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-09-01 01:38:16,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:38:16,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:16,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710359523] [2023-09-01 01:38:16,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710359523] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:38:16,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:38:16,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:38:16,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247169724] [2023-09-01 01:38:16,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:38:16,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:38:16,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:16,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:38:16,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:38:16,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-09-01 01:38:16,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 83 transitions, 710 flow. Second operand has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:16,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:16,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-09-01 01:38:16,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:21,068 INFO L130 PetriNetUnfolder]: 20646/30205 cut-off events. [2023-09-01 01:38:21,069 INFO L131 PetriNetUnfolder]: For 138259/138259 co-relation queries the response was YES. [2023-09-01 01:38:21,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133594 conditions, 30205 events. 20646/30205 cut-off events. For 138259/138259 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 180923 event pairs, 14159 based on Foata normal form. 320/30525 useless extension candidates. Maximal degree in co-relation 133545. Up to 23547 conditions per place. [2023-09-01 01:38:21,355 INFO L137 encePairwiseOnDemand]: 752/758 looper letters, 146 selfloop transitions, 19 changer transitions 1/166 dead transitions. [2023-09-01 01:38:21,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 166 transitions, 1634 flow [2023-09-01 01:38:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:38:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:38:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1958 transitions. [2023-09-01 01:38:21,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43051890941073 [2023-09-01 01:38:21,357 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1958 transitions. [2023-09-01 01:38:21,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1958 transitions. [2023-09-01 01:38:21,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:21,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1958 transitions. [2023-09-01 01:38:21,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 326.3333333333333) internal successors, (1958), 6 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:21,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:21,361 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:21,361 INFO L175 Difference]: Start difference. First operand has 127 places, 83 transitions, 710 flow. Second operand 6 states and 1958 transitions. [2023-09-01 01:38:21,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 166 transitions, 1634 flow [2023-09-01 01:38:21,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 166 transitions, 1556 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-09-01 01:38:21,868 INFO L231 Difference]: Finished difference. Result has 126 places, 86 transitions, 767 flow [2023-09-01 01:38:21,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=767, PETRI_PLACES=126, PETRI_TRANSITIONS=86} [2023-09-01 01:38:21,868 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 61 predicate places. [2023-09-01 01:38:21,869 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 86 transitions, 767 flow [2023-09-01 01:38:21,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:21,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:21,869 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:38:21,880 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 (50)] Forceful destruction successful, exit code 0 [2023-09-01 01:38:22,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:22,070 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:22,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:22,071 INFO L85 PathProgramCache]: Analyzing trace with hash -870686778, now seen corresponding path program 4 times [2023-09-01 01:38:22,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:22,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602188201] [2023-09-01 01:38:22,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:38:22,071 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 [2023-09-01 01:38:22,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:22,072 INFO L229 MonitoredProcess]: Starting monitored process 51 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) [2023-09-01 01:38:22,073 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 (51)] Waiting until timeout for monitored process [2023-09-01 01:38:22,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:38:22,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:38:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:38:22,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-09-01 01:38:22,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:38:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-09-01 01:38:22,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602188201] [2023-09-01 01:38:22,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602188201] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 01:38:22,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:38:22,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-09-01 01:38:22,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252650541] [2023-09-01 01:38:22,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:38:22,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:38:22,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:22,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:38:22,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 01:38:22,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-09-01 01:38:22,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 86 transitions, 767 flow. Second operand has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:22,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:22,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-09-01 01:38:22,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:27,454 INFO L130 PetriNetUnfolder]: 19890/29099 cut-off events. [2023-09-01 01:38:27,455 INFO L131 PetriNetUnfolder]: For 130341/130341 co-relation queries the response was YES. [2023-09-01 01:38:27,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127483 conditions, 29099 events. 19890/29099 cut-off events. For 130341/130341 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 175008 event pairs, 1204 based on Foata normal form. 320/29419 useless extension candidates. Maximal degree in co-relation 127433. Up to 14618 conditions per place. [2023-09-01 01:38:27,801 INFO L137 encePairwiseOnDemand]: 750/758 looper letters, 137 selfloop transitions, 49 changer transitions 3/189 dead transitions. [2023-09-01 01:38:27,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 189 transitions, 1853 flow [2023-09-01 01:38:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:38:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:38:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2274 transitions. [2023-09-01 01:38:27,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-09-01 01:38:27,804 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2274 transitions. [2023-09-01 01:38:27,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2274 transitions. [2023-09-01 01:38:27,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:27,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2274 transitions. [2023-09-01 01:38:27,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 324.85714285714283) internal successors, (2274), 7 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:27,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:27,808 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 758.0) internal successors, (6064), 8 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:27,808 INFO L175 Difference]: Start difference. First operand has 126 places, 86 transitions, 767 flow. Second operand 7 states and 2274 transitions. [2023-09-01 01:38:27,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 189 transitions, 1853 flow [2023-09-01 01:38:28,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 189 transitions, 1819 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 01:38:28,432 INFO L231 Difference]: Finished difference. Result has 130 places, 103 transitions, 985 flow [2023-09-01 01:38:28,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=985, PETRI_PLACES=130, PETRI_TRANSITIONS=103} [2023-09-01 01:38:28,432 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 65 predicate places. [2023-09-01 01:38:28,432 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 103 transitions, 985 flow [2023-09-01 01:38:28,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:28,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:28,433 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:38:28,444 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 (51)] Forceful destruction successful, exit code 0 [2023-09-01 01:38:28,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:28,634 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:28,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:28,635 INFO L85 PathProgramCache]: Analyzing trace with hash 335601190, now seen corresponding path program 5 times [2023-09-01 01:38:28,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:28,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281267827] [2023-09-01 01:38:28,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:38:28,635 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 [2023-09-01 01:38:28,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:28,636 INFO L229 MonitoredProcess]: Starting monitored process 52 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) [2023-09-01 01:38:28,637 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 (52)] Waiting until timeout for monitored process [2023-09-01 01:38:29,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-09-01 01:38:29,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:38:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:38:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-09-01 01:38:29,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:38:29,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:29,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281267827] [2023-09-01 01:38:29,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281267827] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:38:29,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:38:29,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:38:29,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966175914] [2023-09-01 01:38:29,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:38:29,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:38:29,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:29,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:38:29,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:38:29,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 758 [2023-09-01 01:38:29,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 103 transitions, 985 flow. Second operand has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:29,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:29,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 758 [2023-09-01 01:38:29,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:34,196 INFO L130 PetriNetUnfolder]: 19331/28134 cut-off events. [2023-09-01 01:38:34,196 INFO L131 PetriNetUnfolder]: For 138666/138666 co-relation queries the response was YES. [2023-09-01 01:38:34,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128642 conditions, 28134 events. 19331/28134 cut-off events. For 138666/138666 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 163310 event pairs, 11918 based on Foata normal form. 34/28168 useless extension candidates. Maximal degree in co-relation 128591. Up to 24156 conditions per place. [2023-09-01 01:38:34,582 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 115 selfloop transitions, 19 changer transitions 17/151 dead transitions. [2023-09-01 01:38:34,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 151 transitions, 1593 flow [2023-09-01 01:38:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:38:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:38:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1634 transitions. [2023-09-01 01:38:34,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43113456464379946 [2023-09-01 01:38:34,586 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1634 transitions. [2023-09-01 01:38:34,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1634 transitions. [2023-09-01 01:38:34,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:34,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1634 transitions. [2023-09-01 01:38:34,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 326.8) internal successors, (1634), 5 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:34,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:34,591 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:34,591 INFO L175 Difference]: Start difference. First operand has 130 places, 103 transitions, 985 flow. Second operand 5 states and 1634 transitions. [2023-09-01 01:38:34,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 151 transitions, 1593 flow [2023-09-01 01:38:35,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 151 transitions, 1495 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-09-01 01:38:35,178 INFO L231 Difference]: Finished difference. Result has 127 places, 101 transitions, 901 flow [2023-09-01 01:38:35,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=901, PETRI_PLACES=127, PETRI_TRANSITIONS=101} [2023-09-01 01:38:35,178 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 62 predicate places. [2023-09-01 01:38:35,178 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 101 transitions, 901 flow [2023-09-01 01:38:35,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.6) internal successors, (1593), 5 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:35,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:35,179 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:38:35,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2023-09-01 01:38:35,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:35,379 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:35,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1301690820, now seen corresponding path program 1 times [2023-09-01 01:38:35,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:35,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063879911] [2023-09-01 01:38:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:38:35,381 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 [2023-09-01 01:38:35,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:35,381 INFO L229 MonitoredProcess]: Starting monitored process 53 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) [2023-09-01 01:38:35,383 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 (53)] Waiting until timeout for monitored process [2023-09-01 01:38:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:38:35,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:38:35,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-09-01 01:38:35,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:38:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-09-01 01:38:36,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:36,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063879911] [2023-09-01 01:38:36,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063879911] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 01:38:36,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:38:36,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-09-01 01:38:36,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014887601] [2023-09-01 01:38:36,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:38:36,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:38:36,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:36,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:38:36,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 01:38:36,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-09-01 01:38:36,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 101 transitions, 901 flow. Second operand has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:36,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:36,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-09-01 01:38:36,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:40,487 INFO L130 PetriNetUnfolder]: 20419/29678 cut-off events. [2023-09-01 01:38:40,487 INFO L131 PetriNetUnfolder]: For 108385/108385 co-relation queries the response was YES. [2023-09-01 01:38:40,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128446 conditions, 29678 events. 20419/29678 cut-off events. For 108385/108385 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 175569 event pairs, 2892 based on Foata normal form. 490/30168 useless extension candidates. Maximal degree in co-relation 128401. Up to 24009 conditions per place. [2023-09-01 01:38:40,745 INFO L137 encePairwiseOnDemand]: 751/758 looper letters, 154 selfloop transitions, 20 changer transitions 3/177 dead transitions. [2023-09-01 01:38:40,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 177 transitions, 1783 flow [2023-09-01 01:38:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:38:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:38:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1629 transitions. [2023-09-01 01:38:40,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298153034300792 [2023-09-01 01:38:40,747 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1629 transitions. [2023-09-01 01:38:40,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1629 transitions. [2023-09-01 01:38:40,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:40,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1629 transitions. [2023-09-01 01:38:40,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.8) internal successors, (1629), 5 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:40,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:40,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:40,751 INFO L175 Difference]: Start difference. First operand has 127 places, 101 transitions, 901 flow. Second operand 5 states and 1629 transitions. [2023-09-01 01:38:40,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 177 transitions, 1783 flow [2023-09-01 01:38:41,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 177 transitions, 1697 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-09-01 01:38:41,350 INFO L231 Difference]: Finished difference. Result has 124 places, 105 transitions, 935 flow [2023-09-01 01:38:41,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=935, PETRI_PLACES=124, PETRI_TRANSITIONS=105} [2023-09-01 01:38:41,351 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 59 predicate places. [2023-09-01 01:38:41,351 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 105 transitions, 935 flow [2023-09-01 01:38:41,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.4) internal successors, (1592), 5 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:41,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:41,352 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:38:41,366 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 (53)] Ended with exit code 0 [2023-09-01 01:38:41,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:41,561 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:41,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1490356124, now seen corresponding path program 2 times [2023-09-01 01:38:41,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:41,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003537946] [2023-09-01 01:38:41,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:38:41,562 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 [2023-09-01 01:38:41,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:41,563 INFO L229 MonitoredProcess]: Starting monitored process 54 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) [2023-09-01 01:38:41,566 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 (54)] Waiting until timeout for monitored process [2023-09-01 01:38:42,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:38:42,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:38:42,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:38:42,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-09-01 01:38:42,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:38:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-09-01 01:38:42,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:42,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003537946] [2023-09-01 01:38:42,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003537946] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 01:38:42,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:38:42,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-09-01 01:38:42,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679186437] [2023-09-01 01:38:42,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:38:42,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:38:42,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:42,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:38:42,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 01:38:42,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-09-01 01:38:42,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 105 transitions, 935 flow. Second operand has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:42,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:42,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-09-01 01:38:42,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:47,474 INFO L130 PetriNetUnfolder]: 21398/31083 cut-off events. [2023-09-01 01:38:47,474 INFO L131 PetriNetUnfolder]: For 123626/123626 co-relation queries the response was YES. [2023-09-01 01:38:47,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138313 conditions, 31083 events. 21398/31083 cut-off events. For 123626/123626 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 183901 event pairs, 11810 based on Foata normal form. 490/31573 useless extension candidates. Maximal degree in co-relation 138266. Up to 23954 conditions per place. [2023-09-01 01:38:47,738 INFO L137 encePairwiseOnDemand]: 750/758 looper letters, 157 selfloop transitions, 22 changer transitions 1/180 dead transitions. [2023-09-01 01:38:47,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 180 transitions, 1815 flow [2023-09-01 01:38:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:38:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:38:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1951 transitions. [2023-09-01 01:38:47,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289797713280563 [2023-09-01 01:38:47,740 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1951 transitions. [2023-09-01 01:38:47,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1951 transitions. [2023-09-01 01:38:47,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:47,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1951 transitions. [2023-09-01 01:38:47,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 325.1666666666667) internal successors, (1951), 6 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:47,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:47,744 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:47,744 INFO L175 Difference]: Start difference. First operand has 124 places, 105 transitions, 935 flow. Second operand 6 states and 1951 transitions. [2023-09-01 01:38:47,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 180 transitions, 1815 flow [2023-09-01 01:38:48,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 180 transitions, 1804 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 01:38:48,132 INFO L231 Difference]: Finished difference. Result has 129 places, 106 transitions, 986 flow [2023-09-01 01:38:48,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=986, PETRI_PLACES=129, PETRI_TRANSITIONS=106} [2023-09-01 01:38:48,132 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 64 predicate places. [2023-09-01 01:38:48,132 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 106 transitions, 986 flow [2023-09-01 01:38:48,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:48,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:48,133 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:38:48,145 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 (54)] Forceful destruction successful, exit code 0 [2023-09-01 01:38:48,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:48,334 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:48,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1314474816, now seen corresponding path program 3 times [2023-09-01 01:38:48,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:48,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333509222] [2023-09-01 01:38:48,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:38:48,335 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 [2023-09-01 01:38:48,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:48,336 INFO L229 MonitoredProcess]: Starting monitored process 55 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) [2023-09-01 01:38:48,336 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 (55)] Waiting until timeout for monitored process [2023-09-01 01:38:50,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-09-01 01:38:50,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:38:50,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:38:50,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 01:38:50,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:38:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 01:38:50,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 01:38:50,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333509222] [2023-09-01 01:38:50,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333509222] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 01:38:50,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:38:50,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-09-01 01:38:50,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334580718] [2023-09-01 01:38:50,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:38:50,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:38:50,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 01:38:50,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:38:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-09-01 01:38:50,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 758 [2023-09-01 01:38:50,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 106 transitions, 986 flow. Second operand has 5 states, 5 states have (on average 318.2) internal successors, (1591), 5 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:50,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:38:50,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 758 [2023-09-01 01:38:50,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:38:55,434 INFO L130 PetriNetUnfolder]: 20220/29373 cut-off events. [2023-09-01 01:38:55,434 INFO L131 PetriNetUnfolder]: For 121268/121268 co-relation queries the response was YES. [2023-09-01 01:38:55,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132297 conditions, 29373 events. 20220/29373 cut-off events. For 121268/121268 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 171340 event pairs, 11592 based on Foata normal form. 490/29863 useless extension candidates. Maximal degree in co-relation 132248. Up to 25104 conditions per place. [2023-09-01 01:38:55,731 INFO L137 encePairwiseOnDemand]: 753/758 looper letters, 134 selfloop transitions, 24 changer transitions 2/160 dead transitions. [2023-09-01 01:38:55,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 160 transitions, 1675 flow [2023-09-01 01:38:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:38:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:38:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1629 transitions. [2023-09-01 01:38:55,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298153034300792 [2023-09-01 01:38:55,733 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1629 transitions. [2023-09-01 01:38:55,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1629 transitions. [2023-09-01 01:38:55,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:38:55,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1629 transitions. [2023-09-01 01:38:55,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.8) internal successors, (1629), 5 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:55,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:55,736 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:55,736 INFO L175 Difference]: Start difference. First operand has 129 places, 106 transitions, 986 flow. Second operand 5 states and 1629 transitions. [2023-09-01 01:38:55,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 160 transitions, 1675 flow [2023-09-01 01:38:56,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 160 transitions, 1622 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-09-01 01:38:56,235 INFO L231 Difference]: Finished difference. Result has 128 places, 104 transitions, 964 flow [2023-09-01 01:38:56,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=964, PETRI_PLACES=128, PETRI_TRANSITIONS=104} [2023-09-01 01:38:56,235 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 63 predicate places. [2023-09-01 01:38:56,235 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 104 transitions, 964 flow [2023-09-01 01:38:56,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.2) internal successors, (1591), 5 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:38:56,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:38:56,236 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:38:56,250 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 (55)] Forceful destruction successful, exit code 0 [2023-09-01 01:38:56,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:56,436 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 01:38:56,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:38:56,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1720882315, now seen corresponding path program 1 times [2023-09-01 01:38:56,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 01:38:56,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106315173] [2023-09-01 01:38:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:38:56,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 01:38:56,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 01:38:56,438 INFO L229 MonitoredProcess]: Starting monitored process 56 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) [2023-09-01 01:38:56,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2023-09-01 01:38:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:38:57,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 60 conjunts are in the unsatisfiable core [2023-09-01 01:38:57,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:38:57,633 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 930 treesize of output 898 [2023-09-01 01:38:58,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 5 [2023-09-01 01:38:58,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:38:58,527 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 01:38:58,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 145 [2023-09-01 01:39:00,357 INFO L321 Elim1Store]: treesize reduction 88, result has 9.3 percent of original size [2023-09-01 01:39:00,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 7 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 54 case distinctions, treesize of input 308 treesize of output 124 [2023-09-01 01:39:11,253 WARN L222 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 76 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:39:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-09-01 01:39:17,033 INFO L328 TraceCheckSpWp]: Computing backward predicates...