./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:16:14,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:16:14,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:16:14,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:16:14,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:16:14,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:16:14,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:16:14,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:16:14,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:16:14,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:16:14,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:16:14,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:16:14,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:16:14,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:16:14,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:16:14,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:16:14,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:16:14,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:16:14,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:16:14,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:16:14,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:16:14,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:16:14,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:16:14,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:16:14,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:16:14,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:16:14,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:16:14,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:16:14,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:16:14,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:16:14,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:16:14,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:16:14,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:16:14,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:16:14,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:16:14,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:16:14,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:16:14,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:16:14,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:16:14,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:16:14,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:16:14,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:16:14,388 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:16:14,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:16:14,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:16:14,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:16:14,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:16:14,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:16:14,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:16:14,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:16:14,391 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:16:14,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:16:14,392 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:16:14,392 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:16:14,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:16:14,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:16:14,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:16:14,393 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:16:14,393 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:16:14,393 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:16:14,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:16:14,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:16:14,394 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:16:14,394 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:16:14,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:16:14,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:16:14,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:16:14,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:16:14,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:16:14,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:16:14,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:16:14,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:16:14,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:16:14,396 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:16:14,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:16:14,396 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:16:14,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:16:14,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:16:14,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:16:14,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:16:14,708 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:16:14,708 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:16:14,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-30 07:16:15,771 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:16:15,977 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:16:15,977 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-30 07:16:15,983 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ada897e0/71faf39a9c0d4c32a1a9f855e0eb5c12/FLAG47fa0b9d9 [2023-08-30 07:16:15,993 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ada897e0/71faf39a9c0d4c32a1a9f855e0eb5c12 [2023-08-30 07:16:15,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:16:15,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:16:15,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:16:15,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:16:16,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:16:16,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:16:15" (1/1) ... [2023-08-30 07:16:16,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5cf28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:16, skipping insertion in model container [2023-08-30 07:16:16,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:16:15" (1/1) ... [2023-08-30 07:16:16,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:16:16,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:16:16,148 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-08-30 07:16:16,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:16:16,164 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 07:16:16,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63a1b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:16, skipping insertion in model container [2023-08-30 07:16:16,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:16:16,165 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 07:16:16,166 INFO L158 Benchmark]: Toolchain (without parser) took 169.35ms. Allocated memory is still 73.4MB. Free memory was 50.3MB in the beginning and 40.4MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:16:16,167 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 38.2MB in the beginning and 38.1MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 07:16:16,167 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.53ms. Allocated memory is still 73.4MB. Free memory was 50.2MB in the beginning and 40.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 07:16:16,169 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 38.2MB in the beginning and 38.1MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 167.53ms. Allocated memory is still 73.4MB. Free memory was 50.2MB in the beginning and 40.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 135]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:16:17,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:16:17,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:16:17,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:16:17,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:16:17,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:16:17,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:16:17,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:16:17,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:16:17,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:16:17,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:16:17,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:16:17,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:16:17,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:16:17,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:16:17,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:16:17,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:16:17,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:16:17,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:16:17,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:16:17,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:16:17,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:16:17,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:16:17,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:16:17,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:16:17,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:16:17,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:16:17,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:16:17,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:16:17,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:16:17,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:16:17,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:16:17,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:16:17,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:16:17,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:16:17,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:16:17,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:16:17,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:16:17,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:16:17,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:16:17,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:16:17,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 07:16:17,903 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:16:17,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:16:17,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:16:17,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:16:17,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:16:17,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:16:17,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:16:17,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:16:17,906 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:16:17,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:16:17,907 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:16:17,907 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:16:17,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:16:17,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:16:17,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:16:17,908 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:16:17,908 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:16:17,908 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:16:17,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:16:17,909 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:16:17,909 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 07:16:17,909 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 07:16:17,909 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:16:17,909 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:16:17,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:16:17,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:16:17,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:16:17,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:16:17,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:16:17,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:16:17,911 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 07:16:17,911 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 07:16:17,911 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:16:17,911 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:16:17,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:16:17,912 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 07:16:17,912 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:16:17,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:16:18,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:16:18,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:16:18,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:16:18,232 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:16:18,232 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:16:18,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-30 07:16:19,421 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:16:19,642 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:16:19,643 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-30 07:16:19,648 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/476f50e2f/d0c4f69c4150482fbc2d274c9a0fd6e7/FLAG92756fd3d [2023-08-30 07:16:19,661 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/476f50e2f/d0c4f69c4150482fbc2d274c9a0fd6e7 [2023-08-30 07:16:19,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:16:19,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:16:19,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:16:19,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:16:19,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:16:19,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:19,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1153a647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19, skipping insertion in model container [2023-08-30 07:16:19,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:19,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:16:19,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:16:19,834 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-08-30 07:16:19,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:16:19,875 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 07:16:19,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:16:19,903 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-08-30 07:16:19,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:16:19,923 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:16:19,959 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-08-30 07:16:19,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:16:19,983 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:16:19,983 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:16:19,989 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:16:19,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19 WrapperNode [2023-08-30 07:16:19,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:16:19,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:16:19,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:16:19,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:16:19,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:20,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:20,053 INFO L138 Inliner]: procedures = 27, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2023-08-30 07:16:20,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:16:20,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:16:20,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:16:20,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:16:20,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:20,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:20,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:20,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:20,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:20,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:20,100 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:20,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:20,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:16:20,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:16:20,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:16:20,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:16:20,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (1/1) ... [2023-08-30 07:16:20,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:16:20,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:16:20,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 07:16:20,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 07:16:20,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:16:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 07:16:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:16:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 07:16:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:16:20,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:16:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:16:20,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:16:20,188 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 07:16:20,188 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 07:16:20,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:16:20,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:16:20,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 07:16:20,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:16:20,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:16:20,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:16:20,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 07:16:20,190 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:16:20,342 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:16:20,343 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:16:20,865 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:16:20,997 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:16:20,997 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 07:16:20,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:16:20 BoogieIcfgContainer [2023-08-30 07:16:20,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:16:21,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:16:21,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:16:21,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:16:21,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:16:19" (1/3) ... [2023-08-30 07:16:21,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc6cc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:16:21, skipping insertion in model container [2023-08-30 07:16:21,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:16:19" (2/3) ... [2023-08-30 07:16:21,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc6cc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:16:21, skipping insertion in model container [2023-08-30 07:16:21,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:16:20" (3/3) ... [2023-08-30 07:16:21,007 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-08-30 07:16:21,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:16:21,021 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 07:16:21,022 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:16:21,101 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 07:16:21,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 224 transitions, 472 flow [2023-08-30 07:16:21,187 INFO L130 PetriNetUnfolder]: 18/221 cut-off events. [2023-08-30 07:16:21,188 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:16:21,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 221 events. 18/221 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 232 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 174. Up to 3 conditions per place. [2023-08-30 07:16:21,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 224 transitions, 472 flow [2023-08-30 07:16:21,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 217 transitions, 452 flow [2023-08-30 07:16:21,205 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:16:21,214 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 217 transitions, 452 flow [2023-08-30 07:16:21,225 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 217 transitions, 452 flow [2023-08-30 07:16:21,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 217 transitions, 452 flow [2023-08-30 07:16:21,278 INFO L130 PetriNetUnfolder]: 18/217 cut-off events. [2023-08-30 07:16:21,279 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 07:16:21,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 217 events. 18/217 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 174. Up to 3 conditions per place. [2023-08-30 07:16:21,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-08-30 07:16:43,099 INFO L134 LiptonReduction]: Checked pairs total: 4207 [2023-08-30 07:16:43,099 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-08-30 07:16:43,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:16:43,118 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;@69241c5a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:16:43,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-08-30 07:16:43,121 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 07:16:43,121 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:16:43,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:43,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:16:43,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:16:43,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash 32725, now seen corresponding path program 1 times [2023-08-30 07:16:43,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:43,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049487391] [2023-08-30 07:16:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:43,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:43,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:43,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:43,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 07:16:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:43,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:16:43,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:43,333 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:16:43,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:16:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:43,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:43,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:43,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049487391] [2023-08-30 07:16:43,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049487391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:43,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:43,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:16:43,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343553381] [2023-08-30 07:16:43,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:43,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:16:43,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:43,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:16:43,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:16:43,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 457 [2023-08-30 07:16:43,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:43,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:43,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 457 [2023-08-30 07:16:43,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:44,736 INFO L130 PetriNetUnfolder]: 5982/7543 cut-off events. [2023-08-30 07:16:44,736 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 07:16:44,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15216 conditions, 7543 events. 5982/7543 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 33477 event pairs, 3015 based on Foata normal form. 0/1885 useless extension candidates. Maximal degree in co-relation 13723. Up to 7494 conditions per place. [2023-08-30 07:16:44,790 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 07:16:44,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 216 flow [2023-08-30 07:16:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:16:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:16:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2023-08-30 07:16:44,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274252370532458 [2023-08-30 07:16:44,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2023-08-30 07:16:44,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2023-08-30 07:16:44,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:44,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2023-08-30 07:16:44,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:44,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:44,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:44,819 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 586 transitions. [2023-08-30 07:16:44,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 216 flow [2023-08-30 07:16:44,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 07:16:44,831 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 110 flow [2023-08-30 07:16:44,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=110, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-30 07:16:44,835 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-08-30 07:16:44,835 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 110 flow [2023-08-30 07:16:44,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:44,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:44,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 07:16:44,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 07:16:45,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:45,046 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:16:45,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:45,047 INFO L85 PathProgramCache]: Analyzing trace with hash 32726, now seen corresponding path program 1 times [2023-08-30 07:16:45,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:45,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27266226] [2023-08-30 07:16:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:45,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:45,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:45,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:45,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 07:16:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:45,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:16:45,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:45,230 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:16:45,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:16:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:45,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:45,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:45,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27266226] [2023-08-30 07:16:45,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27266226] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:45,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:45,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:16:45,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147091411] [2023-08-30 07:16:45,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:45,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:16:45,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:45,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:16:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:16:45,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 457 [2023-08-30 07:16:45,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:45,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:45,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 457 [2023-08-30 07:16:45,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:47,436 INFO L130 PetriNetUnfolder]: 11950/15070 cut-off events. [2023-08-30 07:16:47,436 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 07:16:47,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30173 conditions, 15070 events. 11950/15070 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 72986 event pairs, 6027 based on Foata normal form. 0/3784 useless extension candidates. Maximal degree in co-relation 30167. Up to 7491 conditions per place. [2023-08-30 07:16:47,522 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 89 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-08-30 07:16:47,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 96 transitions, 392 flow [2023-08-30 07:16:47,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:16:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:16:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-30 07:16:47,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587892049598833 [2023-08-30 07:16:47,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-30 07:16:47,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-30 07:16:47,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:47,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-30 07:16:47,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:47,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:47,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:47,532 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 110 flow. Second operand 3 states and 629 transitions. [2023-08-30 07:16:47,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 96 transitions, 392 flow [2023-08-30 07:16:47,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 96 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:16:47,535 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 141 flow [2023-08-30 07:16:47,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-30 07:16:47,536 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-08-30 07:16:47,537 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 141 flow [2023-08-30 07:16:47,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:47,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:47,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:16:47,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:16:47,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:47,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:16:47,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:47,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1018781, now seen corresponding path program 1 times [2023-08-30 07:16:47,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:47,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295845767] [2023-08-30 07:16:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:47,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:47,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:47,760 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:47,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 07:16:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:47,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:16:47,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:47,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:47,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:47,948 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 07:16:47,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 07:16:47,971 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 07:16:47,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 07:16:48,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:48,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:16:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:48,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:48,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:48,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295845767] [2023-08-30 07:16:48,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295845767] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:48,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:48,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:16:48,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70889629] [2023-08-30 07:16:48,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:48,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:16:48,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:48,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:16:48,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:16:48,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 457 [2023-08-30 07:16:48,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:48,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:48,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 457 [2023-08-30 07:16:48,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:49,762 INFO L130 PetriNetUnfolder]: 9351/11909 cut-off events. [2023-08-30 07:16:49,763 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 07:16:49,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23866 conditions, 11909 events. 9351/11909 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 57655 event pairs, 4696 based on Foata normal form. 0/3179 useless extension candidates. Maximal degree in co-relation 23857. Up to 11811 conditions per place. [2023-08-30 07:16:49,805 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 48 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-30 07:16:49,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 235 flow [2023-08-30 07:16:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:16:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:16:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-30 07:16:49,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43326039387308535 [2023-08-30 07:16:49,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-30 07:16:49,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-30 07:16:49,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:49,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-30 07:16:49,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:49,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:49,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:49,814 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 141 flow. Second operand 3 states and 594 transitions. [2023-08-30 07:16:49,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 235 flow [2023-08-30 07:16:49,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:16:49,816 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 131 flow [2023-08-30 07:16:49,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-30 07:16:49,817 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2023-08-30 07:16:49,817 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 131 flow [2023-08-30 07:16:49,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:49,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:49,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:16:49,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 07:16:50,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:50,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:16:50,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:50,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1017782, now seen corresponding path program 1 times [2023-08-30 07:16:50,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:50,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81282092] [2023-08-30 07:16:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:50,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:50,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:50,036 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:50,037 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 (5)] Waiting until timeout for monitored process [2023-08-30 07:16:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:50,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:16:50,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:50,195 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:16:50,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:16:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:50,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:16:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:50,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:50,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81282092] [2023-08-30 07:16:50,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81282092] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:16:50,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:16:50,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 07:16:50,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384941567] [2023-08-30 07:16:50,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:16:50,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:16:50,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:50,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:16:50,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:16:51,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 457 [2023-08-30 07:16:51,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 131 flow. Second operand has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:51,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:51,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 457 [2023-08-30 07:16:51,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:53,801 INFO L130 PetriNetUnfolder]: 14006/17846 cut-off events. [2023-08-30 07:16:53,801 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 07:16:53,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35759 conditions, 17846 events. 14006/17846 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 1413. Compared 90803 event pairs, 7038 based on Foata normal form. 0/4801 useless extension candidates. Maximal degree in co-relation 35750. Up to 5907 conditions per place. [2023-08-30 07:16:53,877 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 125 selfloop transitions, 17 changer transitions 0/145 dead transitions. [2023-08-30 07:16:53,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 145 transitions, 631 flow [2023-08-30 07:16:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:16:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:16:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1156 transitions. [2023-08-30 07:16:53,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215900802334063 [2023-08-30 07:16:53,881 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1156 transitions. [2023-08-30 07:16:53,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1156 transitions. [2023-08-30 07:16:53,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:53,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1156 transitions. [2023-08-30 07:16:53,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:53,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:53,890 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:53,891 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 131 flow. Second operand 6 states and 1156 transitions. [2023-08-30 07:16:53,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 145 transitions, 631 flow [2023-08-30 07:16:53,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 145 transitions, 630 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:16:53,893 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 259 flow [2023-08-30 07:16:53,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=259, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2023-08-30 07:16:53,894 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-30 07:16:53,895 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 259 flow [2023-08-30 07:16:53,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:53,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:53,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:16:53,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:16:54,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:54,104 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:16:54,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:54,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1018782, now seen corresponding path program 1 times [2023-08-30 07:16:54,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:54,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784293474] [2023-08-30 07:16:54,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:54,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:54,108 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:54,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 07:16:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:16:54,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:54,272 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 07:16:54,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 07:16:54,602 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-30 07:16:54,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 07:16:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:54,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:54,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:54,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784293474] [2023-08-30 07:16:54,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784293474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:54,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:54,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:16:54,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296701670] [2023-08-30 07:16:54,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:54,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:16:54,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:16:54,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:16:54,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 457 [2023-08-30 07:16:54,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:54,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:54,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 457 [2023-08-30 07:16:54,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:56,075 INFO L130 PetriNetUnfolder]: 10112/13109 cut-off events. [2023-08-30 07:16:56,075 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 07:16:56,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26332 conditions, 13109 events. 10112/13109 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 67461 event pairs, 5043 based on Foata normal form. 0/3886 useless extension candidates. Maximal degree in co-relation 26318. Up to 12962 conditions per place. [2023-08-30 07:16:56,133 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 57 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-30 07:16:56,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 355 flow [2023-08-30 07:16:56,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:16:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:16:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-08-30 07:16:56,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961342086068566 [2023-08-30 07:16:56,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-08-30 07:16:56,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-08-30 07:16:56,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:56,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-08-30 07:16:56,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:56,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:56,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:56,143 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 259 flow. Second operand 3 states and 589 transitions. [2023-08-30 07:16:56,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 355 flow [2023-08-30 07:16:56,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 336 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 07:16:56,149 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 222 flow [2023-08-30 07:16:56,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-30 07:16:56,152 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-30 07:16:56,153 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 222 flow [2023-08-30 07:16:56,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:56,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:56,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:16:56,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 07:16:56,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:56,362 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:16:56,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:56,363 INFO L85 PathProgramCache]: Analyzing trace with hash 979074907, now seen corresponding path program 1 times [2023-08-30 07:16:56,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:56,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864520143] [2023-08-30 07:16:56,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:56,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:56,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:56,365 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:56,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 07:16:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:56,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 07:16:56,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:56,519 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 07:16:56,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 07:16:56,749 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 07:16:56,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 07:16:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:56,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:56,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:56,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864520143] [2023-08-30 07:16:56,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864520143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:56,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:56,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:16:56,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122533758] [2023-08-30 07:16:56,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:56,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:16:56,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:16:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:16:56,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 457 [2023-08-30 07:16:56,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:56,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:56,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 457 [2023-08-30 07:16:56,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:57,981 INFO L130 PetriNetUnfolder]: 9707/12563 cut-off events. [2023-08-30 07:16:57,981 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-08-30 07:16:57,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25231 conditions, 12563 events. 9707/12563 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 64156 event pairs, 4827 based on Foata normal form. 0/3790 useless extension candidates. Maximal degree in co-relation 25216. Up to 12416 conditions per place. [2023-08-30 07:16:58,031 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 55 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 07:16:58,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 330 flow [2023-08-30 07:16:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:16:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:16:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-08-30 07:16:58,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42815463165572576 [2023-08-30 07:16:58,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-08-30 07:16:58,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-08-30 07:16:58,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:58,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-08-30 07:16:58,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:58,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:58,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:58,039 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 222 flow. Second operand 3 states and 587 transitions. [2023-08-30 07:16:58,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 330 flow [2023-08-30 07:16:58,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:16:58,041 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 219 flow [2023-08-30 07:16:58,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-08-30 07:16:58,042 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-08-30 07:16:58,042 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 219 flow [2023-08-30 07:16:58,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:58,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:58,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:16:58,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-08-30 07:16:58,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:58,253 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:16:58,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:16:58,253 INFO L85 PathProgramCache]: Analyzing trace with hash 979074905, now seen corresponding path program 1 times [2023-08-30 07:16:58,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:16:58,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297499822] [2023-08-30 07:16:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:16:58,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:16:58,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:16:58,255 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:16:58,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 07:16:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:16:58,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:16:58,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:16:58,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:58,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:58,433 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 07:16:58,433 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 [2023-08-30 07:16:58,447 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 39 treesize of output 37 [2023-08-30 07:16:58,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:16:58,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:16:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:16:58,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:16:58,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:16:58,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297499822] [2023-08-30 07:16:58,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297499822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:16:58,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:16:58,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:16:58,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646322779] [2023-08-30 07:16:58,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:16:58,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:16:58,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:16:58,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:16:58,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:16:58,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 457 [2023-08-30 07:16:58,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:58,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:16:58,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 457 [2023-08-30 07:16:58,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:16:59,852 INFO L130 PetriNetUnfolder]: 9302/12017 cut-off events. [2023-08-30 07:16:59,852 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-08-30 07:16:59,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24140 conditions, 12017 events. 9302/12017 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 60998 event pairs, 4611 based on Foata normal form. 0/3694 useless extension candidates. Maximal degree in co-relation 24124. Up to 11870 conditions per place. [2023-08-30 07:16:59,893 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 53 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-30 07:16:59,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 323 flow [2023-08-30 07:16:59,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:16:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:16:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-08-30 07:16:59,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288840262582057 [2023-08-30 07:16:59,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-08-30 07:16:59,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-08-30 07:16:59,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:16:59,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-08-30 07:16:59,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:59,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:59,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:59,901 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 219 flow. Second operand 3 states and 588 transitions. [2023-08-30 07:16:59,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 323 flow [2023-08-30 07:16:59,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:16:59,903 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 216 flow [2023-08-30 07:16:59,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-08-30 07:16:59,903 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-08-30 07:16:59,904 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 216 flow [2023-08-30 07:16:59,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:16:59,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:16:59,904 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 07:16:59,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:17:00,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:00,114 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:17:00,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:00,114 INFO L85 PathProgramCache]: Analyzing trace with hash 259225558, now seen corresponding path program 2 times [2023-08-30 07:17:00,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:00,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456705324] [2023-08-30 07:17:00,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:17:00,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:00,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:00,115 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:17:00,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 07:17:00,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:17:00,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:17:00,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:17:00,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:00,302 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:17:00,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:17:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:00,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:17:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:00,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:00,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456705324] [2023-08-30 07:17:00,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456705324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:17:00,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:17:00,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 07:17:00,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826138732] [2023-08-30 07:17:00,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:17:00,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:17:00,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:00,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:17:00,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:17:03,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 457 [2023-08-30 07:17:03,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 216 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:03,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:03,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 457 [2023-08-30 07:17:03,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:06,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:17:08,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:17:10,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:17:11,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:17:13,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:17:20,774 INFO L130 PetriNetUnfolder]: 30876/39910 cut-off events. [2023-08-30 07:17:20,774 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2023-08-30 07:17:20,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80071 conditions, 39910 events. 30876/39910 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 1658. Compared 221455 event pairs, 15343 based on Foata normal form. 12/12409 useless extension candidates. Maximal degree in co-relation 80054. Up to 3962 conditions per place. [2023-08-30 07:17:20,947 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 345 selfloop transitions, 32 changer transitions 0/380 dead transitions. [2023-08-30 07:17:20,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 380 transitions, 1774 flow [2023-08-30 07:17:20,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:17:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:17:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2429 transitions. [2023-08-30 07:17:20,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429248723559446 [2023-08-30 07:17:20,954 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2429 transitions. [2023-08-30 07:17:20,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2429 transitions. [2023-08-30 07:17:20,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:20,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2429 transitions. [2023-08-30 07:17:20,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 202.41666666666666) internal successors, (2429), 12 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:20,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:20,967 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:20,967 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 216 flow. Second operand 12 states and 2429 transitions. [2023-08-30 07:17:20,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 380 transitions, 1774 flow [2023-08-30 07:17:20,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 380 transitions, 1773 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:20,973 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 459 flow [2023-08-30 07:17:20,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-30 07:17:20,974 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2023-08-30 07:17:20,974 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 459 flow [2023-08-30 07:17:20,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:20,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:20,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:17:20,994 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 (9)] Ended with exit code 0 [2023-08-30 07:17:21,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:21,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:17:21,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:21,186 INFO L85 PathProgramCache]: Analyzing trace with hash 286544683, now seen corresponding path program 1 times [2023-08-30 07:17:21,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:21,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042877578] [2023-08-30 07:17:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:21,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:21,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:21,187 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:17:21,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 07:17:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:21,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:17:21,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:21,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:21,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:21,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042877578] [2023-08-30 07:17:21,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042877578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:21,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:21,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:17:21,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270973337] [2023-08-30 07:17:21,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:21,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:17:21,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:21,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:17:21,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:17:21,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 457 [2023-08-30 07:17:21,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:21,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:21,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 457 [2023-08-30 07:17:21,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:24,854 INFO L130 PetriNetUnfolder]: 30944/40180 cut-off events. [2023-08-30 07:17:24,854 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-08-30 07:17:24,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80768 conditions, 40180 events. 30944/40180 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 1643. Compared 225046 event pairs, 15370 based on Foata normal form. 270/12859 useless extension candidates. Maximal degree in co-relation 80743. Up to 39396 conditions per place. [2023-08-30 07:17:25,027 INFO L137 encePairwiseOnDemand]: 443/457 looper letters, 97 selfloop transitions, 3 changer transitions 1/104 dead transitions. [2023-08-30 07:17:25,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 104 transitions, 841 flow [2023-08-30 07:17:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:17:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:17:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 784 transitions. [2023-08-30 07:17:25,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288840262582057 [2023-08-30 07:17:25,031 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 784 transitions. [2023-08-30 07:17:25,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 784 transitions. [2023-08-30 07:17:25,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:25,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 784 transitions. [2023-08-30 07:17:25,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:25,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:25,036 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:25,036 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 459 flow. Second operand 4 states and 784 transitions. [2023-08-30 07:17:25,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 104 transitions, 841 flow [2023-08-30 07:17:25,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 104 transitions, 758 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 07:17:25,040 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 429 flow [2023-08-30 07:17:25,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=429, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-30 07:17:25,041 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2023-08-30 07:17:25,041 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 429 flow [2023-08-30 07:17:25,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:25,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:25,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:17:25,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 07:17:25,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:25,249 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:17:25,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash 293171228, now seen corresponding path program 1 times [2023-08-30 07:17:25,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:25,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225996318] [2023-08-30 07:17:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:25,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:25,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:25,250 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:17:25,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 07:17:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:17:25,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:25,399 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 07:17:25,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 07:17:25,425 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 07:17:25,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 07:17:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:25,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:25,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:25,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225996318] [2023-08-30 07:17:25,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225996318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:25,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:25,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:17:25,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991583567] [2023-08-30 07:17:25,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:25,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:17:25,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:25,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:17:25,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:17:25,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 457 [2023-08-30 07:17:25,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 429 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:25,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:25,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 457 [2023-08-30 07:17:25,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:29,241 INFO L130 PetriNetUnfolder]: 29254/37870 cut-off events. [2023-08-30 07:17:29,241 INFO L131 PetriNetUnfolder]: For 3109/3109 co-relation queries the response was YES. [2023-08-30 07:17:29,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97436 conditions, 37870 events. 29254/37870 cut-off events. For 3109/3109 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 209972 event pairs, 14450 based on Foata normal form. 0/12210 useless extension candidates. Maximal degree in co-relation 97409. Up to 37350 conditions per place. [2023-08-30 07:17:29,417 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 70 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 07:17:29,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 567 flow [2023-08-30 07:17:29,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:17:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:17:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-08-30 07:17:29,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208606856309263 [2023-08-30 07:17:29,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-08-30 07:17:29,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-08-30 07:17:29,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:29,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-08-30 07:17:29,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:29,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:29,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:29,422 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 429 flow. Second operand 3 states and 577 transitions. [2023-08-30 07:17:29,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 567 flow [2023-08-30 07:17:29,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 561 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:29,427 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 421 flow [2023-08-30 07:17:29,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-08-30 07:17:29,430 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 15 predicate places. [2023-08-30 07:17:29,430 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 421 flow [2023-08-30 07:17:29,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:29,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:29,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:17:29,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 07:17:29,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:29,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:17:29,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash 293171230, now seen corresponding path program 1 times [2023-08-30 07:17:29,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:29,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135457689] [2023-08-30 07:17:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:29,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:29,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:29,642 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:17:29,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 07:17:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:17:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:29,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:17:29,818 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 07:17:29,818 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 [2023-08-30 07:17:29,830 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 298 treesize of output 290 [2023-08-30 07:17:29,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:17:29,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 07:17:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:29,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:29,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:29,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135457689] [2023-08-30 07:17:29,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135457689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:29,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:29,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:17:29,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228464730] [2023-08-30 07:17:29,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:29,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:17:29,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:29,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:17:29,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:17:30,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 457 [2023-08-30 07:17:30,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 421 flow. Second operand has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:30,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:30,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 457 [2023-08-30 07:17:30,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:33,839 INFO L130 PetriNetUnfolder]: 27434/35430 cut-off events. [2023-08-30 07:17:33,840 INFO L131 PetriNetUnfolder]: For 3091/3091 co-relation queries the response was YES. [2023-08-30 07:17:33,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90894 conditions, 35430 events. 27434/35430 cut-off events. For 3091/3091 co-relation queries the response was YES. Maximal size of possible extension queue 1459. Compared 194183 event pairs, 13500 based on Foata normal form. 0/11820 useless extension candidates. Maximal degree in co-relation 90866. Up to 34910 conditions per place. [2023-08-30 07:17:34,017 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 68 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2023-08-30 07:17:34,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 555 flow [2023-08-30 07:17:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:17:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:17:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-30 07:17:34,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215900802334063 [2023-08-30 07:17:34,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-30 07:17:34,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-30 07:17:34,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:34,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-30 07:17:34,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:34,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:34,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:34,023 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 421 flow. Second operand 3 states and 578 transitions. [2023-08-30 07:17:34,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 555 flow [2023-08-30 07:17:34,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:34,027 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 418 flow [2023-08-30 07:17:34,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-08-30 07:17:34,028 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2023-08-30 07:17:34,028 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 418 flow [2023-08-30 07:17:34,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:34,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:34,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:17:34,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 07:17:34,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:34,237 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:17:34,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:34,237 INFO L85 PathProgramCache]: Analyzing trace with hash -526619824, now seen corresponding path program 1 times [2023-08-30 07:17:34,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:34,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665256010] [2023-08-30 07:17:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:34,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:34,240 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:17:34,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 07:17:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:17:34,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:34,383 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:17:34,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:17:34,406 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 07:17:34,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 07:17:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:17:34,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:17:34,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:34,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665256010] [2023-08-30 07:17:34,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665256010] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:17:34,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:17:34,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:17:34,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610999404] [2023-08-30 07:17:34,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:17:34,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:17:34,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:34,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:17:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:17:34,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 457 [2023-08-30 07:17:34,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 418 flow. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:34,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:34,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 457 [2023-08-30 07:17:34,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:36,901 INFO L130 PetriNetUnfolder]: 17174/22510 cut-off events. [2023-08-30 07:17:36,901 INFO L131 PetriNetUnfolder]: For 2621/2621 co-relation queries the response was YES. [2023-08-30 07:17:36,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56985 conditions, 22510 events. 17174/22510 cut-off events. For 2621/2621 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 121006 event pairs, 8530 based on Foata normal form. 0/8620 useless extension candidates. Maximal degree in co-relation 56956. Up to 22167 conditions per place. [2023-08-30 07:17:36,998 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 54 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2023-08-30 07:17:36,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 69 transitions, 538 flow [2023-08-30 07:17:36,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:17:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:17:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2023-08-30 07:17:37,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048140043763676 [2023-08-30 07:17:37,001 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2023-08-30 07:17:37,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2023-08-30 07:17:37,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:17:37,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2023-08-30 07:17:37,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:37,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:37,005 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:37,006 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 418 flow. Second operand 4 states and 740 transitions. [2023-08-30 07:17:37,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 69 transitions, 538 flow [2023-08-30 07:17:37,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:17:37,010 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 429 flow [2023-08-30 07:17:37,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=429, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-08-30 07:17:37,010 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 13 predicate places. [2023-08-30 07:17:37,011 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 429 flow [2023-08-30 07:17:37,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:37,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:17:37,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:17:37,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 07:17:37,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:37,221 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:17:37,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:17:37,221 INFO L85 PathProgramCache]: Analyzing trace with hash -526619823, now seen corresponding path program 1 times [2023-08-30 07:17:37,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:17:37,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488073672] [2023-08-30 07:17:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:17:37,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:17:37,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:17:37,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:17:37,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 07:17:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:17:37,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 07:17:37,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:17:37,429 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:17:37,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:17:37,519 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:17:37,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:17:37,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:17:37,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 07:17:37,619 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 07:17:37,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 07:17:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:37,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:17:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:17:41,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:17:41,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488073672] [2023-08-30 07:17:41,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488073672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:17:41,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:17:41,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:17:41,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186697390] [2023-08-30 07:17:41,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:17:41,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:17:41,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:17:41,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:17:41,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:17:46,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 07:17:48,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 457 [2023-08-30 07:17:48,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 160.5) internal successors, (1284), 8 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:17:48,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:17:48,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 457 [2023-08-30 07:17:48,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:17:55,456 WARN L222 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:18:14,945 WARN L222 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:18:21,634 INFO L130 PetriNetUnfolder]: 34766/46026 cut-off events. [2023-08-30 07:18:21,634 INFO L131 PetriNetUnfolder]: For 6942/6942 co-relation queries the response was YES. [2023-08-30 07:18:21,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114881 conditions, 46026 events. 34766/46026 cut-off events. For 6942/6942 co-relation queries the response was YES. Maximal size of possible extension queue 1896. Compared 274513 event pairs, 17490 based on Foata normal form. 0/19856 useless extension candidates. Maximal degree in co-relation 114851. Up to 22251 conditions per place. [2023-08-30 07:18:21,913 INFO L137 encePairwiseOnDemand]: 447/457 looper letters, 151 selfloop transitions, 31 changer transitions 1/186 dead transitions. [2023-08-30 07:18:21,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 186 transitions, 1298 flow [2023-08-30 07:18:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 07:18:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 07:18:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2528 transitions. [2023-08-30 07:18:21,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687819110138585 [2023-08-30 07:18:21,919 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2528 transitions. [2023-08-30 07:18:21,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2528 transitions. [2023-08-30 07:18:21,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:18:21,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2528 transitions. [2023-08-30 07:18:21,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 168.53333333333333) internal successors, (2528), 15 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:21,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 457.0) internal successors, (7312), 16 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:21,932 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 457.0) internal successors, (7312), 16 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:21,932 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 429 flow. Second operand 15 states and 2528 transitions. [2023-08-30 07:18:21,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 186 transitions, 1298 flow [2023-08-30 07:18:21,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 186 transitions, 1285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:18:21,939 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 676 flow [2023-08-30 07:18:21,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=676, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2023-08-30 07:18:21,939 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2023-08-30 07:18:21,939 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 676 flow [2023-08-30 07:18:21,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.5) internal successors, (1284), 8 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:21,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:21,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:21,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 07:18:22,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:22,152 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:18:22,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:22,152 INFO L85 PathProgramCache]: Analyzing trace with hash 731257828, now seen corresponding path program 1 times [2023-08-30 07:18:22,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:22,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394325481] [2023-08-30 07:18:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:18:22,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:22,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:22,154 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:18:22,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 07:18:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:18:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 07:18:22,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:18:22,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:18:22,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:18:22,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394325481] [2023-08-30 07:18:22,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394325481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:18:22,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:18:22,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:18:22,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833572223] [2023-08-30 07:18:22,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:18:22,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:18:22,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:18:22,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:18:22,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:18:22,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2023-08-30 07:18:22,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 676 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:22,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:22,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2023-08-30 07:18:22,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:18:26,626 INFO L130 PetriNetUnfolder]: 28396/38096 cut-off events. [2023-08-30 07:18:26,626 INFO L131 PetriNetUnfolder]: For 20321/20321 co-relation queries the response was YES. [2023-08-30 07:18:26,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102802 conditions, 38096 events. 28396/38096 cut-off events. For 20321/20321 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 229998 event pairs, 3920 based on Foata normal form. 880/19496 useless extension candidates. Maximal degree in co-relation 102766. Up to 36321 conditions per place. [2023-08-30 07:18:26,833 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 94 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2023-08-30 07:18:26,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 100 transitions, 918 flow [2023-08-30 07:18:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:18:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:18:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-30 07:18:26,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412837345003647 [2023-08-30 07:18:26,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-30 07:18:26,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-30 07:18:26,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:18:26,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-30 07:18:26,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:26,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:26,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:26,839 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 676 flow. Second operand 3 states and 605 transitions. [2023-08-30 07:18:26,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 100 transitions, 918 flow [2023-08-30 07:18:26,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 897 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 07:18:26,862 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 684 flow [2023-08-30 07:18:26,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=684, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2023-08-30 07:18:26,863 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 33 predicate places. [2023-08-30 07:18:26,863 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 684 flow [2023-08-30 07:18:26,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:26,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:26,864 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:26,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 07:18:27,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:27,073 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:18:27,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:27,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1102361743, now seen corresponding path program 2 times [2023-08-30 07:18:27,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:27,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501228438] [2023-08-30 07:18:27,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:18:27,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:27,075 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:18:27,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 07:18:27,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:18:27,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:18:27,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 07:18:27,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:27,300 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:18:27,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:18:27,417 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 07:18:27,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 07:18:27,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:18:27,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 07:18:27,581 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 07:18:27,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 07:18:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 07:18:27,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:18:27,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:18:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501228438] [2023-08-30 07:18:27,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501228438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:18:27,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:18:27,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:18:27,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258313724] [2023-08-30 07:18:27,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:18:27,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:18:27,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:18:27,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:18:27,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:18:28,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 457 [2023-08-30 07:18:28,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 684 flow. Second operand has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:28,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:28,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 457 [2023-08-30 07:18:28,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:18:31,370 INFO L130 PetriNetUnfolder]: 19296/26636 cut-off events. [2023-08-30 07:18:31,370 INFO L131 PetriNetUnfolder]: For 29049/29049 co-relation queries the response was YES. [2023-08-30 07:18:31,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75955 conditions, 26636 events. 19296/26636 cut-off events. For 29049/29049 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 163759 event pairs, 8160 based on Foata normal form. 1450/14316 useless extension candidates. Maximal degree in co-relation 75917. Up to 26203 conditions per place. [2023-08-30 07:18:31,495 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 71 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-08-30 07:18:31,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 818 flow [2023-08-30 07:18:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:18:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:18:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 717 transitions. [2023-08-30 07:18:31,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39223194748358864 [2023-08-30 07:18:31,497 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 717 transitions. [2023-08-30 07:18:31,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 717 transitions. [2023-08-30 07:18:31,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:18:31,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 717 transitions. [2023-08-30 07:18:31,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:31,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:31,501 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:31,501 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 684 flow. Second operand 4 states and 717 transitions. [2023-08-30 07:18:31,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 818 flow [2023-08-30 07:18:31,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 800 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 07:18:31,512 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 658 flow [2023-08-30 07:18:31,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=658, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2023-08-30 07:18:31,513 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-08-30 07:18:31,513 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 658 flow [2023-08-30 07:18:31,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:31,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:31,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:31,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 07:18:31,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:31,729 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:18:31,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2098642692, now seen corresponding path program 1 times [2023-08-30 07:18:31,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:31,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53439532] [2023-08-30 07:18:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:18:31,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:31,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:31,730 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:18:31,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 07:18:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:18:31,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 07:18:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:31,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 07:18:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:18:31,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:18:31,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:18:31,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53439532] [2023-08-30 07:18:31,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53439532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:18:31,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:18:31,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:18:31,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646385496] [2023-08-30 07:18:31,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:18:31,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:18:31,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:18:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:18:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:18:31,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 457 [2023-08-30 07:18:31,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 658 flow. Second operand has 4 states, 4 states have (on average 178.25) internal successors, (713), 4 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:31,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:31,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 457 [2023-08-30 07:18:31,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:18:34,171 INFO L130 PetriNetUnfolder]: 12496/17776 cut-off events. [2023-08-30 07:18:34,171 INFO L131 PetriNetUnfolder]: For 4149/4149 co-relation queries the response was YES. [2023-08-30 07:18:34,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43425 conditions, 17776 events. 12496/17776 cut-off events. For 4149/4149 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 109186 event pairs, 5300 based on Foata normal form. 0/9916 useless extension candidates. Maximal degree in co-relation 43388. Up to 17344 conditions per place. [2023-08-30 07:18:34,240 INFO L137 encePairwiseOnDemand]: 453/457 looper letters, 64 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2023-08-30 07:18:34,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 814 flow [2023-08-30 07:18:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:18:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:18:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2023-08-30 07:18:34,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40153172866520787 [2023-08-30 07:18:34,242 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2023-08-30 07:18:34,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2023-08-30 07:18:34,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:18:34,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2023-08-30 07:18:34,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:34,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:34,246 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:34,246 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 658 flow. Second operand 4 states and 734 transitions. [2023-08-30 07:18:34,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 814 flow [2023-08-30 07:18:34,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 801 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:18:34,251 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 673 flow [2023-08-30 07:18:34,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=673, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-08-30 07:18:34,256 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 29 predicate places. [2023-08-30 07:18:34,257 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 673 flow [2023-08-30 07:18:34,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.25) internal successors, (713), 4 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:34,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:34,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:34,273 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 (17)] Forceful destruction successful, exit code 0 [2023-08-30 07:18:34,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:34,469 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:18:34,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2098642691, now seen corresponding path program 1 times [2023-08-30 07:18:34,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:34,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983433656] [2023-08-30 07:18:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:18:34,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:34,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:34,471 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:18:34,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 07:18:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:18:34,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 07:18:34,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:18:34,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:18:34,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:18:34,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983433656] [2023-08-30 07:18:34,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983433656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:18:34,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:18:34,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:18:34,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836624760] [2023-08-30 07:18:34,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:18:34,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:18:34,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:18:34,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:18:34,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:18:34,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2023-08-30 07:18:34,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 673 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:34,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:34,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2023-08-30 07:18:34,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:18:36,527 INFO L130 PetriNetUnfolder]: 11716/17096 cut-off events. [2023-08-30 07:18:36,527 INFO L131 PetriNetUnfolder]: For 3741/3741 co-relation queries the response was YES. [2023-08-30 07:18:36,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41149 conditions, 17096 events. 11716/17096 cut-off events. For 3741/3741 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 102946 event pairs, 2040 based on Foata normal form. 620/10486 useless extension candidates. Maximal degree in co-relation 41112. Up to 13741 conditions per place. [2023-08-30 07:18:36,618 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 87 selfloop transitions, 3 changer transitions 2/95 dead transitions. [2023-08-30 07:18:36,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 95 transitions, 889 flow [2023-08-30 07:18:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:18:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:18:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-30 07:18:36,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43544857768052514 [2023-08-30 07:18:36,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-30 07:18:36,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-30 07:18:36,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:18:36,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-30 07:18:36,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:36,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:36,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:36,623 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 673 flow. Second operand 3 states and 597 transitions. [2023-08-30 07:18:36,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 95 transitions, 889 flow [2023-08-30 07:18:36,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 95 transitions, 871 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:18:36,627 INFO L231 Difference]: Finished difference. Result has 89 places, 84 transitions, 664 flow [2023-08-30 07:18:36,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=664, PETRI_PLACES=89, PETRI_TRANSITIONS=84} [2023-08-30 07:18:36,628 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-08-30 07:18:36,628 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 84 transitions, 664 flow [2023-08-30 07:18:36,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:36,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:36,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:36,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 07:18:36,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:36,835 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:18:36,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:36,835 INFO L85 PathProgramCache]: Analyzing trace with hash 508704700, now seen corresponding path program 1 times [2023-08-30 07:18:36,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:36,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927706076] [2023-08-30 07:18:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:18:36,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:36,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:36,836 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:18:36,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 07:18:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:18:36,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:18:36,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:18:37,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:18:37,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:18:37,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927706076] [2023-08-30 07:18:37,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927706076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:18:37,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:18:37,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:18:37,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566587946] [2023-08-30 07:18:37,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:18:37,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:18:37,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:18:37,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:18:37,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:18:37,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 457 [2023-08-30 07:18:37,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 84 transitions, 664 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:37,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:37,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 457 [2023-08-30 07:18:37,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:18:39,038 INFO L130 PetriNetUnfolder]: 10660/15618 cut-off events. [2023-08-30 07:18:39,038 INFO L131 PetriNetUnfolder]: For 4298/4298 co-relation queries the response was YES. [2023-08-30 07:18:39,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44506 conditions, 15618 events. 10660/15618 cut-off events. For 4298/4298 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 93046 event pairs, 4050 based on Foata normal form. 30/9117 useless extension candidates. Maximal degree in co-relation 44468. Up to 15053 conditions per place. [2023-08-30 07:18:39,122 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 66 selfloop transitions, 14 changer transitions 16/99 dead transitions. [2023-08-30 07:18:39,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 99 transitions, 918 flow [2023-08-30 07:18:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:18:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:18:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 760 transitions. [2023-08-30 07:18:39,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41575492341356673 [2023-08-30 07:18:39,124 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 760 transitions. [2023-08-30 07:18:39,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 760 transitions. [2023-08-30 07:18:39,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:18:39,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 760 transitions. [2023-08-30 07:18:39,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:39,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:39,127 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:39,127 INFO L175 Difference]: Start difference. First operand has 89 places, 84 transitions, 664 flow. Second operand 4 states and 760 transitions. [2023-08-30 07:18:39,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 99 transitions, 918 flow [2023-08-30 07:18:39,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 99 transitions, 913 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 07:18:39,132 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 706 flow [2023-08-30 07:18:39,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=706, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2023-08-30 07:18:39,133 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2023-08-30 07:18:39,133 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 706 flow [2023-08-30 07:18:39,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:39,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:39,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:18:39,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 07:18:39,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:39,334 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:18:39,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:39,335 INFO L85 PathProgramCache]: Analyzing trace with hash -376902577, now seen corresponding path program 1 times [2023-08-30 07:18:39,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:39,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450285904] [2023-08-30 07:18:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:18:39,335 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 [2023-08-30 07:18:39,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:39,336 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:18:39,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 07:18:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:18:39,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 07:18:39,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:39,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 07:18:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:18:39,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:18:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:18:40,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:18:40,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450285904] [2023-08-30 07:18:40,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450285904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:18:40,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:18:40,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 07:18:40,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187616790] [2023-08-30 07:18:40,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:18:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:18:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:18:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:18:40,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:18:43,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 457 [2023-08-30 07:18:43,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 706 flow. Second operand has 8 states, 8 states have (on average 166.25) internal successors, (1330), 8 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:43,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:18:43,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 457 [2023-08-30 07:18:43,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:18:47,824 INFO L130 PetriNetUnfolder]: 9142/13440 cut-off events. [2023-08-30 07:18:47,824 INFO L131 PetriNetUnfolder]: For 6653/6653 co-relation queries the response was YES. [2023-08-30 07:18:47,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39121 conditions, 13440 events. 9142/13440 cut-off events. For 6653/6653 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 78705 event pairs, 3402 based on Foata normal form. 288/9078 useless extension candidates. Maximal degree in co-relation 39081. Up to 10045 conditions per place. [2023-08-30 07:18:47,904 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 96 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2023-08-30 07:18:47,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1148 flow [2023-08-30 07:18:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:18:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:18:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1389 transitions. [2023-08-30 07:18:47,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3799234135667396 [2023-08-30 07:18:47,908 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1389 transitions. [2023-08-30 07:18:47,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1389 transitions. [2023-08-30 07:18:47,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:18:47,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1389 transitions. [2023-08-30 07:18:47,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 173.625) internal successors, (1389), 8 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:47,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:47,913 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:47,913 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 706 flow. Second operand 8 states and 1389 transitions. [2023-08-30 07:18:47,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1148 flow [2023-08-30 07:18:47,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 131 transitions, 1101 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-30 07:18:47,937 INFO L231 Difference]: Finished difference. Result has 98 places, 85 transitions, 770 flow [2023-08-30 07:18:47,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=770, PETRI_PLACES=98, PETRI_TRANSITIONS=85} [2023-08-30 07:18:47,938 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 39 predicate places. [2023-08-30 07:18:47,938 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 85 transitions, 770 flow [2023-08-30 07:18:47,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 166.25) internal successors, (1330), 8 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:18:47,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:18:47,938 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 07:18:47,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 07:18:48,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:48,139 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:18:48,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:18:48,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1003449302, now seen corresponding path program 3 times [2023-08-30 07:18:48,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:18:48,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062210094] [2023-08-30 07:18:48,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:18:48,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:18:48,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:18:48,141 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:18:48,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 07:18:48,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 07:18:48,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:18:48,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:18:48,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:18:48,416 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:18:48,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:18:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:18:48,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:18:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:18:51,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:18:51,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062210094] [2023-08-30 07:18:51,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062210094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:18:51,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:18:51,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 07:18:51,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100887600] [2023-08-30 07:18:51,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:18:51,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 07:18:51,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:18:51,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 07:18:51,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 07:19:09,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 457 [2023-08-30 07:19:09,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 85 transitions, 770 flow. Second operand has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:09,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:19:09,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 457 [2023-08-30 07:19:09,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:19:17,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:19,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:21,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:23,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:25,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:27,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:29,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:31,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:33,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:35,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:39,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:19:52,244 INFO L130 PetriNetUnfolder]: 13834/20288 cut-off events. [2023-08-30 07:19:52,244 INFO L131 PetriNetUnfolder]: For 17108/17108 co-relation queries the response was YES. [2023-08-30 07:19:52,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62603 conditions, 20288 events. 13834/20288 cut-off events. For 17108/17108 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 123417 event pairs, 5178 based on Foata normal form. 28/14805 useless extension candidates. Maximal degree in co-relation 62563. Up to 8257 conditions per place. [2023-08-30 07:19:52,435 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 365 selfloop transitions, 66 changer transitions 0/434 dead transitions. [2023-08-30 07:19:52,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 434 transitions, 3267 flow [2023-08-30 07:19:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 07:19:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 07:19:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4611 transitions. [2023-08-30 07:19:52,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035886214442013 [2023-08-30 07:19:52,443 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4611 transitions. [2023-08-30 07:19:52,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4611 transitions. [2023-08-30 07:19:52,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:19:52,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4611 transitions. [2023-08-30 07:19:52,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 184.44) internal successors, (4611), 25 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:52,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 457.0) internal successors, (11882), 26 states have internal predecessors, (11882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:52,459 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 457.0) internal successors, (11882), 26 states have internal predecessors, (11882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:52,459 INFO L175 Difference]: Start difference. First operand has 98 places, 85 transitions, 770 flow. Second operand 25 states and 4611 transitions. [2023-08-30 07:19:52,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 434 transitions, 3267 flow [2023-08-30 07:19:52,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 434 transitions, 3106 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 07:19:52,494 INFO L231 Difference]: Finished difference. Result has 131 places, 116 transitions, 1166 flow [2023-08-30 07:19:52,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1166, PETRI_PLACES=131, PETRI_TRANSITIONS=116} [2023-08-30 07:19:52,494 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 72 predicate places. [2023-08-30 07:19:52,495 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 116 transitions, 1166 flow [2023-08-30 07:19:52,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:52,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:19:52,496 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:19:52,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 07:19:52,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:19:52,712 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:19:52,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:19:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1868282756, now seen corresponding path program 2 times [2023-08-30 07:19:52,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:19:52,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455717118] [2023-08-30 07:19:52,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:19:52,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:19:52,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:19:52,714 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:19:52,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 07:19:52,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:19:52,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:19:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 07:19:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:19:52,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 07:19:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 07:19:52,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:19:52,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:19:52,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455717118] [2023-08-30 07:19:52,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455717118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:19:52,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:19:52,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:19:52,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852296915] [2023-08-30 07:19:52,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:19:52,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:19:52,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:19:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:19:52,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:19:53,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 457 [2023-08-30 07:19:53,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 116 transitions, 1166 flow. Second operand has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:53,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:19:53,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 457 [2023-08-30 07:19:53,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:19:55,019 INFO L130 PetriNetUnfolder]: 9154/13808 cut-off events. [2023-08-30 07:19:55,020 INFO L131 PetriNetUnfolder]: For 13899/13899 co-relation queries the response was YES. [2023-08-30 07:19:55,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39109 conditions, 13808 events. 9154/13808 cut-off events. For 13899/13899 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 82804 event pairs, 3198 based on Foata normal form. 2160/11561 useless extension candidates. Maximal degree in co-relation 39055. Up to 13309 conditions per place. [2023-08-30 07:19:55,112 INFO L137 encePairwiseOnDemand]: 453/457 looper letters, 70 selfloop transitions, 41 changer transitions 0/114 dead transitions. [2023-08-30 07:19:55,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 114 transitions, 1372 flow [2023-08-30 07:19:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:19:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:19:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 732 transitions. [2023-08-30 07:19:55,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40043763676148797 [2023-08-30 07:19:55,114 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 732 transitions. [2023-08-30 07:19:55,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 732 transitions. [2023-08-30 07:19:55,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:19:55,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 732 transitions. [2023-08-30 07:19:55,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:55,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:55,117 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:55,117 INFO L175 Difference]: Start difference. First operand has 131 places, 116 transitions, 1166 flow. Second operand 4 states and 732 transitions. [2023-08-30 07:19:55,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 114 transitions, 1372 flow [2023-08-30 07:19:55,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 114 transitions, 1207 flow, removed 36 selfloop flow, removed 12 redundant places. [2023-08-30 07:19:55,125 INFO L231 Difference]: Finished difference. Result has 120 places, 114 transitions, 1067 flow [2023-08-30 07:19:55,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1067, PETRI_PLACES=120, PETRI_TRANSITIONS=114} [2023-08-30 07:19:55,126 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 61 predicate places. [2023-08-30 07:19:55,126 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 114 transitions, 1067 flow [2023-08-30 07:19:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:19:55,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:19:55,127 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1] [2023-08-30 07:19:55,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 07:19:55,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:19:55,336 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:19:55,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:19:55,336 INFO L85 PathProgramCache]: Analyzing trace with hash 773369486, now seen corresponding path program 1 times [2023-08-30 07:19:55,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:19:55,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842620776] [2023-08-30 07:19:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:19:55,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:19:55,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:19:55,337 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:19:55,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 07:19:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:19:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 07:19:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:19:55,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 07:19:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:19:56,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:20:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:20:01,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:20:01,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842620776] [2023-08-30 07:20:01,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842620776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:20:01,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:20:01,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2023-08-30 07:20:01,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817370657] [2023-08-30 07:20:01,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:20:01,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 07:20:01,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:20:01,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 07:20:01,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2023-08-30 07:20:39,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 457 [2023-08-30 07:20:39,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 114 transitions, 1067 flow. Second operand has 32 states, 32 states have (on average 171.03125) internal successors, (5473), 32 states have internal predecessors, (5473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:20:39,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:20:39,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 457 [2023-08-30 07:20:39,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:20:49,050 WARN L222 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:20:51,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:20:53,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:20:55,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:20:57,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:20:59,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:21:01,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:21:03,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:21:05,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:21:07,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:21:09,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:21:11,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:21:13,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:21:15,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:21:17,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:21:56,487 INFO L130 PetriNetUnfolder]: 20386/30736 cut-off events. [2023-08-30 07:21:56,487 INFO L131 PetriNetUnfolder]: For 19189/19189 co-relation queries the response was YES. [2023-08-30 07:21:56,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86567 conditions, 30736 events. 20386/30736 cut-off events. For 19189/19189 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 193075 event pairs, 7134 based on Foata normal form. 64/21053 useless extension candidates. Maximal degree in co-relation 86515. Up to 12529 conditions per place. [2023-08-30 07:21:56,888 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 766 selfloop transitions, 77 changer transitions 0/846 dead transitions. [2023-08-30 07:21:56,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 846 transitions, 6116 flow [2023-08-30 07:21:56,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 07:21:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 07:21:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 6107 transitions. [2023-08-30 07:21:56,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176012035010941 [2023-08-30 07:21:56,895 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 6107 transitions. [2023-08-30 07:21:56,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 6107 transitions. [2023-08-30 07:21:56,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:21:56,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 6107 transitions. [2023-08-30 07:21:56,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 190.84375) internal successors, (6107), 32 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:21:56,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 457.0) internal successors, (15081), 33 states have internal predecessors, (15081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:21:56,910 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 457.0) internal successors, (15081), 33 states have internal predecessors, (15081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:21:56,910 INFO L175 Difference]: Start difference. First operand has 120 places, 114 transitions, 1067 flow. Second operand 32 states and 6107 transitions. [2023-08-30 07:21:56,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 846 transitions, 6116 flow [2023-08-30 07:21:56,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 846 transitions, 5980 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:21:56,931 INFO L231 Difference]: Finished difference. Result has 166 places, 133 transitions, 1459 flow [2023-08-30 07:21:56,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1459, PETRI_PLACES=166, PETRI_TRANSITIONS=133} [2023-08-30 07:21:56,932 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 107 predicate places. [2023-08-30 07:21:56,932 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 133 transitions, 1459 flow [2023-08-30 07:21:56,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 171.03125) internal successors, (5473), 32 states have internal predecessors, (5473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:21:56,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:21:56,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:21:56,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 07:21:57,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:21:57,137 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:21:57,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:21:57,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1465022338, now seen corresponding path program 1 times [2023-08-30 07:21:57,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:21:57,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298984285] [2023-08-30 07:21:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:21:57,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:21:57,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:21:57,139 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:21:57,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 07:21:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:21:57,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:21:57,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:21:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:21:57,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:21:57,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:21:57,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298984285] [2023-08-30 07:21:57,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298984285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:21:57,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:21:57,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:21:57,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836335918] [2023-08-30 07:21:57,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:21:57,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:21:57,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:21:57,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:21:57,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:21:57,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 457 [2023-08-30 07:21:57,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 133 transitions, 1459 flow. Second operand has 6 states, 6 states have (on average 185.66666666666666) internal successors, (1114), 6 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:21:57,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:21:57,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 457 [2023-08-30 07:21:57,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:22:04,551 INFO L130 PetriNetUnfolder]: 28965/45980 cut-off events. [2023-08-30 07:22:04,551 INFO L131 PetriNetUnfolder]: For 15706/15706 co-relation queries the response was YES. [2023-08-30 07:22:05,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127601 conditions, 45980 events. 28965/45980 cut-off events. For 15706/15706 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 333526 event pairs, 9048 based on Foata normal form. 87/32669 useless extension candidates. Maximal degree in co-relation 127531. Up to 20123 conditions per place. [2023-08-30 07:22:05,724 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 138 selfloop transitions, 27 changer transitions 2/169 dead transitions. [2023-08-30 07:22:05,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 169 transitions, 1903 flow [2023-08-30 07:22:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:22:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:22:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1156 transitions. [2023-08-30 07:22:05,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215900802334063 [2023-08-30 07:22:05,727 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1156 transitions. [2023-08-30 07:22:05,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1156 transitions. [2023-08-30 07:22:05,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:22:05,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1156 transitions. [2023-08-30 07:22:05,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:22:05,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:22:05,730 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:22:05,730 INFO L175 Difference]: Start difference. First operand has 166 places, 133 transitions, 1459 flow. Second operand 6 states and 1156 transitions. [2023-08-30 07:22:05,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 169 transitions, 1903 flow [2023-08-30 07:22:05,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 169 transitions, 1778 flow, removed 16 selfloop flow, removed 13 redundant places. [2023-08-30 07:22:05,749 INFO L231 Difference]: Finished difference. Result has 159 places, 135 transitions, 1402 flow [2023-08-30 07:22:05,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1402, PETRI_PLACES=159, PETRI_TRANSITIONS=135} [2023-08-30 07:22:05,749 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 100 predicate places. [2023-08-30 07:22:05,749 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 135 transitions, 1402 flow [2023-08-30 07:22:05,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.66666666666666) internal successors, (1114), 6 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:22:05,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:22:05,750 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-08-30 07:22:05,758 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 [2023-08-30 07:22:05,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:22:05,950 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:22:05,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:22:05,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1181897686, now seen corresponding path program 4 times [2023-08-30 07:22:05,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:22:05,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608806044] [2023-08-30 07:22:05,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:22:05,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:22:05,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:22:05,952 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:22:05,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 07:22:06,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:22:06,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:22:06,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 07:22:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:22:06,243 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 07:22:06,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 07:22:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:22:07,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:22:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:22:17,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:22:17,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608806044] [2023-08-30 07:22:17,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608806044] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:22:17,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:22:17,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-08-30 07:22:17,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950389268] [2023-08-30 07:22:17,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:22:17,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 07:22:17,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:22:17,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 07:22:17,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-08-30 07:23:47,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 457 [2023-08-30 07:23:47,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 135 transitions, 1402 flow. Second operand has 48 states, 48 states have (on average 171.0) internal successors, (8208), 48 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:23:47,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:23:47,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 457 [2023-08-30 07:23:47,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:24:15,186 WARN L222 SmtUtils]: Spent 12.96s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:24:30,219 WARN L222 SmtUtils]: Spent 12.87s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:24:32,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:34,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:36,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:38,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:40,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:42,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:44,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:46,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:48,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:50,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:52,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:54,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:56,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:24:58,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:00,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:02,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:04,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:06,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:08,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:10,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:12,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:14,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 07:25:29,410 WARN L222 SmtUtils]: Spent 12.97s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:25:46,060 WARN L222 SmtUtils]: Spent 14.37s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:25:57,629 WARN L222 SmtUtils]: Spent 9.44s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:26:06,673 WARN L222 SmtUtils]: Spent 7.04s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:26:14,304 WARN L222 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:27:00,173 INFO L130 PetriNetUnfolder]: 28414/44971 cut-off events. [2023-08-30 07:27:00,174 INFO L131 PetriNetUnfolder]: For 37904/37904 co-relation queries the response was YES. [2023-08-30 07:27:00,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132561 conditions, 44971 events. 28414/44971 cut-off events. For 37904/37904 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 325020 event pairs, 14268 based on Foata normal form. 24/36811 useless extension candidates. Maximal degree in co-relation 132489. Up to 18793 conditions per place. [2023-08-30 07:27:00,590 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 682 selfloop transitions, 127 changer transitions 0/812 dead transitions. [2023-08-30 07:27:00,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 812 transitions, 6703 flow [2023-08-30 07:27:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 07:27:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 07:27:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 8786 transitions. [2023-08-30 07:27:00,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40052881108679794 [2023-08-30 07:27:00,599 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 8786 transitions. [2023-08-30 07:27:00,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 8786 transitions. [2023-08-30 07:27:00,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:00,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 8786 transitions. [2023-08-30 07:27:00,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 183.04166666666666) internal successors, (8786), 48 states have internal predecessors, (8786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:00,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 457.0) internal successors, (22393), 49 states have internal predecessors, (22393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:00,625 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 457.0) internal successors, (22393), 49 states have internal predecessors, (22393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:00,625 INFO L175 Difference]: Start difference. First operand has 159 places, 135 transitions, 1402 flow. Second operand 48 states and 8786 transitions. [2023-08-30 07:27:00,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 812 transitions, 6703 flow [2023-08-30 07:27:00,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 812 transitions, 6530 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-08-30 07:27:00,696 INFO L231 Difference]: Finished difference. Result has 229 places, 186 transitions, 2312 flow [2023-08-30 07:27:00,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2312, PETRI_PLACES=229, PETRI_TRANSITIONS=186} [2023-08-30 07:27:00,696 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 170 predicate places. [2023-08-30 07:27:00,697 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 186 transitions, 2312 flow [2023-08-30 07:27:00,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 171.0) internal successors, (8208), 48 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:00,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:00,698 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 07:27:00,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 07:27:00,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:00,913 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:27:00,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:00,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1564745327, now seen corresponding path program 1 times [2023-08-30 07:27:00,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:00,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987425376] [2023-08-30 07:27:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:27:00,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:00,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:00,915 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:27:00,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 07:27:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:27:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 07:27:01,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:27:01,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:27:01,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:01,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987425376] [2023-08-30 07:27:01,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987425376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:27:01,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:27:01,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:27:01,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419221774] [2023-08-30 07:27:01,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:27:01,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:27:01,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:27:01,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:27:01,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 457 [2023-08-30 07:27:01,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 186 transitions, 2312 flow. Second operand has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:01,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:01,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 457 [2023-08-30 07:27:01,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:10,628 INFO L130 PetriNetUnfolder]: 30067/48793 cut-off events. [2023-08-30 07:27:10,629 INFO L131 PetriNetUnfolder]: For 31622/31622 co-relation queries the response was YES. [2023-08-30 07:27:11,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141820 conditions, 48793 events. 30067/48793 cut-off events. For 31622/31622 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 372536 event pairs, 5742 based on Foata normal form. 1218/41311 useless extension candidates. Maximal degree in co-relation 141723. Up to 36193 conditions per place. [2023-08-30 07:27:11,310 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 196 selfloop transitions, 5 changer transitions 0/204 dead transitions. [2023-08-30 07:27:11,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 204 transitions, 2767 flow [2023-08-30 07:27:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:27:11,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:27:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 759 transitions. [2023-08-30 07:27:11,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152078774617068 [2023-08-30 07:27:11,313 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 759 transitions. [2023-08-30 07:27:11,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 759 transitions. [2023-08-30 07:27:11,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:11,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 759 transitions. [2023-08-30 07:27:11,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.75) internal successors, (759), 4 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:11,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:11,316 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:11,317 INFO L175 Difference]: Start difference. First operand has 229 places, 186 transitions, 2312 flow. Second operand 4 states and 759 transitions. [2023-08-30 07:27:11,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 204 transitions, 2767 flow [2023-08-30 07:27:11,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 204 transitions, 2478 flow, removed 66 selfloop flow, removed 21 redundant places. [2023-08-30 07:27:11,380 INFO L231 Difference]: Finished difference. Result has 212 places, 188 transitions, 2050 flow [2023-08-30 07:27:11,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2050, PETRI_PLACES=212, PETRI_TRANSITIONS=188} [2023-08-30 07:27:11,381 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 153 predicate places. [2023-08-30 07:27:11,381 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 188 transitions, 2050 flow [2023-08-30 07:27:11,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:11,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:11,381 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 07:27:11,391 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 (26)] Ended with exit code 0 [2023-08-30 07:27:11,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:11,585 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:27:11,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash 771711053, now seen corresponding path program 2 times [2023-08-30 07:27:11,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:11,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212421012] [2023-08-30 07:27:11,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:27:11,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:11,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:11,589 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:27:11,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 07:27:11,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:27:11,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:27:11,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:27:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:11,933 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 [2023-08-30 07:27:12,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:27:12,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:27:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:27:12,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:27:12,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212421012] [2023-08-30 07:27:12,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212421012] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:27:12,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:27:12,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 07:27:12,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604596060] [2023-08-30 07:27:12,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:27:12,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 07:27:12,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 07:27:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 07:27:13,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 457 [2023-08-30 07:27:13,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 188 transitions, 2050 flow. Second operand has 7 states, 7 states have (on average 174.14285714285714) internal successors, (1219), 7 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:13,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:13,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 457 [2023-08-30 07:27:13,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:23,691 INFO L130 PetriNetUnfolder]: 30464/49978 cut-off events. [2023-08-30 07:27:23,691 INFO L131 PetriNetUnfolder]: For 59325/59325 co-relation queries the response was YES. [2023-08-30 07:27:24,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159945 conditions, 49978 events. 30464/49978 cut-off events. For 59325/59325 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 388142 event pairs, 5880 based on Foata normal form. 1176/43846 useless extension candidates. Maximal degree in co-relation 159846. Up to 35869 conditions per place. [2023-08-30 07:27:24,419 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 197 selfloop transitions, 5 changer transitions 0/205 dead transitions. [2023-08-30 07:27:24,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 205 transitions, 2509 flow [2023-08-30 07:27:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:27:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:27:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 731 transitions. [2023-08-30 07:27:24,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399890590809628 [2023-08-30 07:27:24,422 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 731 transitions. [2023-08-30 07:27:24,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 731 transitions. [2023-08-30 07:27:24,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:24,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 731 transitions. [2023-08-30 07:27:24,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:24,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:24,425 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:24,426 INFO L175 Difference]: Start difference. First operand has 212 places, 188 transitions, 2050 flow. Second operand 4 states and 731 transitions. [2023-08-30 07:27:24,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 205 transitions, 2509 flow [2023-08-30 07:27:24,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 205 transitions, 2500 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 07:27:24,503 INFO L231 Difference]: Finished difference. Result has 214 places, 189 transitions, 2066 flow [2023-08-30 07:27:24,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2066, PETRI_PLACES=214, PETRI_TRANSITIONS=189} [2023-08-30 07:27:24,503 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 155 predicate places. [2023-08-30 07:27:24,503 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 189 transitions, 2066 flow [2023-08-30 07:27:24,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 174.14285714285714) internal successors, (1219), 7 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:24,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:24,504 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 07:27:24,513 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 (27)] Ended with exit code 0 [2023-08-30 07:27:24,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:24,705 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:27:24,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1284076598, now seen corresponding path program 1 times [2023-08-30 07:27:24,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:24,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253571341] [2023-08-30 07:27:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:27:24,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:24,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:24,707 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:27:24,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 07:27:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:27:24,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:27:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:27:25,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:27:25,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:25,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253571341] [2023-08-30 07:27:25,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253571341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:25,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:25,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 07:27:25,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601121900] [2023-08-30 07:27:25,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:25,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:27:25,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:25,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:27:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:27:25,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 457 [2023-08-30 07:27:25,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 189 transitions, 2066 flow. Second operand has 10 states, 10 states have (on average 176.4) internal successors, (1764), 10 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:25,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:25,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 457 [2023-08-30 07:27:25,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:34,846 INFO L130 PetriNetUnfolder]: 25648/43090 cut-off events. [2023-08-30 07:27:34,847 INFO L131 PetriNetUnfolder]: For 72597/72597 co-relation queries the response was YES. [2023-08-30 07:27:35,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148438 conditions, 43090 events. 25648/43090 cut-off events. For 72597/72597 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 337702 event pairs, 12600 based on Foata normal form. 1316/38862 useless extension candidates. Maximal degree in co-relation 148338. Up to 32204 conditions per place. [2023-08-30 07:27:35,407 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 245 selfloop transitions, 25 changer transitions 19/292 dead transitions. [2023-08-30 07:27:35,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 292 transitions, 3479 flow [2023-08-30 07:27:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:27:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:27:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1625 transitions. [2023-08-30 07:27:35,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950887430099684 [2023-08-30 07:27:35,410 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1625 transitions. [2023-08-30 07:27:35,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1625 transitions. [2023-08-30 07:27:35,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:35,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1625 transitions. [2023-08-30 07:27:35,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.55555555555554) internal successors, (1625), 9 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:35,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:35,414 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:35,414 INFO L175 Difference]: Start difference. First operand has 214 places, 189 transitions, 2066 flow. Second operand 9 states and 1625 transitions. [2023-08-30 07:27:35,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 292 transitions, 3479 flow [2023-08-30 07:27:35,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 292 transitions, 3463 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 07:27:35,489 INFO L231 Difference]: Finished difference. Result has 223 places, 191 transitions, 2216 flow [2023-08-30 07:27:35,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2216, PETRI_PLACES=223, PETRI_TRANSITIONS=191} [2023-08-30 07:27:35,490 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 164 predicate places. [2023-08-30 07:27:35,490 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 191 transitions, 2216 flow [2023-08-30 07:27:35,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.4) internal successors, (1764), 10 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:35,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:35,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:35,499 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 [2023-08-30 07:27:35,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:35,691 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:27:35,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:35,692 INFO L85 PathProgramCache]: Analyzing trace with hash 391159394, now seen corresponding path program 2 times [2023-08-30 07:27:35,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:35,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121022061] [2023-08-30 07:27:35,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:27:35,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:35,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:35,693 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:27:35,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 07:27:35,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:27:35,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:27:36,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 07:27:36,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:36,104 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 [2023-08-30 07:27:36,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:27:36,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:27:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 07:27:36,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:36,492 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1126 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1126) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-08-30 07:27:36,870 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:27:36,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 279 treesize of output 257 [2023-08-30 07:27:36,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 97 [2023-08-30 07:27:37,047 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:27:37,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 155 treesize of output 149 [2023-08-30 07:27:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 07:27:38,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:38,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121022061] [2023-08-30 07:27:38,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121022061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:38,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:38,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-08-30 07:27:38,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357379519] [2023-08-30 07:27:38,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:38,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 07:27:38,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 07:27:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=104, Unknown=1, NotChecked=20, Total=156 [2023-08-30 07:27:38,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 457 [2023-08-30 07:27:38,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 191 transitions, 2216 flow. Second operand has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:38,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:38,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 457 [2023-08-30 07:27:38,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:27:49,330 INFO L130 PetriNetUnfolder]: 30798/50042 cut-off events. [2023-08-30 07:27:49,330 INFO L131 PetriNetUnfolder]: For 81734/81734 co-relation queries the response was YES. [2023-08-30 07:27:49,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172696 conditions, 50042 events. 30798/50042 cut-off events. For 81734/81734 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 383146 event pairs, 3220 based on Foata normal form. 560/44134 useless extension candidates. Maximal degree in co-relation 172593. Up to 30325 conditions per place. [2023-08-30 07:27:50,077 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 171 selfloop transitions, 57 changer transitions 2/232 dead transitions. [2023-08-30 07:27:50,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 232 transitions, 2852 flow [2023-08-30 07:27:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 07:27:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 07:27:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1125 transitions. [2023-08-30 07:27:50,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35167239762425756 [2023-08-30 07:27:50,080 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1125 transitions. [2023-08-30 07:27:50,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1125 transitions. [2023-08-30 07:27:50,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:27:50,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1125 transitions. [2023-08-30 07:27:50,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.71428571428572) internal successors, (1125), 7 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:50,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:50,083 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:50,083 INFO L175 Difference]: Start difference. First operand has 223 places, 191 transitions, 2216 flow. Second operand 7 states and 1125 transitions. [2023-08-30 07:27:50,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 232 transitions, 2852 flow [2023-08-30 07:27:50,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 232 transitions, 2822 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-30 07:27:50,313 INFO L231 Difference]: Finished difference. Result has 228 places, 194 transitions, 2343 flow [2023-08-30 07:27:50,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2343, PETRI_PLACES=228, PETRI_TRANSITIONS=194} [2023-08-30 07:27:50,314 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 169 predicate places. [2023-08-30 07:27:50,314 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 194 transitions, 2343 flow [2023-08-30 07:27:50,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:50,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:27:50,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:27:50,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-30 07:27:50,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:50,520 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:27:50,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:27:50,520 INFO L85 PathProgramCache]: Analyzing trace with hash 407479946, now seen corresponding path program 3 times [2023-08-30 07:27:50,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:27:50,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724171646] [2023-08-30 07:27:50,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:27:50,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:27:50,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:27:50,522 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:27:50,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 07:27:50,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:27:50,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:27:50,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 07:27:50,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:27:50,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 07:27:50,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 07:27:50,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:27:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 07:27:51,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:27:51,088 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1181 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1181) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-08-30 07:27:51,377 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:27:51,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 475 treesize of output 418 [2023-08-30 07:27:51,543 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:27:51,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 209 treesize of output 203 [2023-08-30 07:27:51,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:27:51,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 70 [2023-08-30 07:27:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2023-08-30 07:27:52,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:27:52,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724171646] [2023-08-30 07:27:52,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724171646] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:27:52,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:27:52,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 07:27:52,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708142043] [2023-08-30 07:27:52,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:27:52,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:27:52,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:27:52,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:27:52,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=123, Unknown=1, NotChecked=22, Total=182 [2023-08-30 07:27:52,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 457 [2023-08-30 07:27:52,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 194 transitions, 2343 flow. Second operand has 14 states, 14 states have (on average 146.71428571428572) internal successors, (2054), 14 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:27:52,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:27:52,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 457 [2023-08-30 07:27:52,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:28:06,053 INFO L130 PetriNetUnfolder]: 40710/64882 cut-off events. [2023-08-30 07:28:06,054 INFO L131 PetriNetUnfolder]: For 131509/131509 co-relation queries the response was YES. [2023-08-30 07:28:07,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237004 conditions, 64882 events. 40710/64882 cut-off events. For 131509/131509 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 496247 event pairs, 4228 based on Foata normal form. 448/59534 useless extension candidates. Maximal degree in co-relation 236899. Up to 33937 conditions per place. [2023-08-30 07:28:07,451 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 174 selfloop transitions, 61 changer transitions 0/237 dead transitions. [2023-08-30 07:28:07,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 237 transitions, 3013 flow [2023-08-30 07:28:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 07:28:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 07:28:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1076 transitions. [2023-08-30 07:28:07,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3363551109721788 [2023-08-30 07:28:07,455 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1076 transitions. [2023-08-30 07:28:07,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1076 transitions. [2023-08-30 07:28:07,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:28:07,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1076 transitions. [2023-08-30 07:28:07,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:07,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:07,459 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:07,459 INFO L175 Difference]: Start difference. First operand has 228 places, 194 transitions, 2343 flow. Second operand 7 states and 1076 transitions. [2023-08-30 07:28:07,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 237 transitions, 3013 flow [2023-08-30 07:28:09,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 237 transitions, 2891 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-30 07:28:09,164 INFO L231 Difference]: Finished difference. Result has 233 places, 201 transitions, 2430 flow [2023-08-30 07:28:09,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2430, PETRI_PLACES=233, PETRI_TRANSITIONS=201} [2023-08-30 07:28:09,165 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 174 predicate places. [2023-08-30 07:28:09,166 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 201 transitions, 2430 flow [2023-08-30 07:28:09,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 146.71428571428572) internal successors, (2054), 14 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:09,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:28:09,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:28:09,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-08-30 07:28:09,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:28:09,367 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:28:09,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:28:09,368 INFO L85 PathProgramCache]: Analyzing trace with hash 639386214, now seen corresponding path program 4 times [2023-08-30 07:28:09,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:28:09,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179697384] [2023-08-30 07:28:09,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:28:09,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:28:09,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:28:09,369 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:28:09,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 07:28:09,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:28:09,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:28:09,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:28:09,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:28:09,765 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 510 treesize of output 494 [2023-08-30 07:28:09,923 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 [2023-08-30 07:28:10,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:28:10,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:28:10,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 07:28:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 07:28:10,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:28:10,462 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1233 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1233) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-08-30 07:28:10,492 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1233 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1232 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1232) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1233) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-08-30 07:28:10,825 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:28:10,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1619 treesize of output 1492 [2023-08-30 07:28:10,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 285 [2023-08-30 07:28:10,992 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 07:28:10,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 343 treesize of output 337 [2023-08-30 07:28:11,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:28:11,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 150 [2023-08-30 07:28:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2023-08-30 07:28:11,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:28:11,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179697384] [2023-08-30 07:28:11,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179697384] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:28:11,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:28:11,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-08-30 07:28:11,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491476591] [2023-08-30 07:28:11,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:28:11,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 07:28:11,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:28:11,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 07:28:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=124, Unknown=2, NotChecked=46, Total=210 [2023-08-30 07:28:12,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 457 [2023-08-30 07:28:12,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 201 transitions, 2430 flow. Second operand has 15 states, 15 states have (on average 146.53333333333333) internal successors, (2198), 15 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:12,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:28:12,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 457 [2023-08-30 07:28:12,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:28:27,509 INFO L130 PetriNetUnfolder]: 45414/72162 cut-off events. [2023-08-30 07:28:27,510 INFO L131 PetriNetUnfolder]: For 202517/202629 co-relation queries the response was YES. [2023-08-30 07:28:29,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276767 conditions, 72162 events. 45414/72162 cut-off events. For 202517/202629 co-relation queries the response was YES. Maximal size of possible extension queue 1246. Compared 557391 event pairs, 4732 based on Foata normal form. 448/65750 useless extension candidates. Maximal degree in co-relation 276659. Up to 28897 conditions per place. [2023-08-30 07:28:29,247 INFO L137 encePairwiseOnDemand]: 446/457 looper letters, 177 selfloop transitions, 69 changer transitions 2/250 dead transitions. [2023-08-30 07:28:29,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 250 transitions, 3149 flow [2023-08-30 07:28:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:28:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:28:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1230 transitions. [2023-08-30 07:28:29,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3364332603938731 [2023-08-30 07:28:29,251 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1230 transitions. [2023-08-30 07:28:29,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1230 transitions. [2023-08-30 07:28:29,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:28:29,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1230 transitions. [2023-08-30 07:28:29,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 153.75) internal successors, (1230), 8 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:29,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:29,255 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:29,255 INFO L175 Difference]: Start difference. First operand has 233 places, 201 transitions, 2430 flow. Second operand 8 states and 1230 transitions. [2023-08-30 07:28:29,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 250 transitions, 3149 flow [2023-08-30 07:28:30,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 250 transitions, 3051 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:28:30,408 INFO L231 Difference]: Finished difference. Result has 241 places, 209 transitions, 2565 flow [2023-08-30 07:28:30,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2565, PETRI_PLACES=241, PETRI_TRANSITIONS=209} [2023-08-30 07:28:30,409 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 182 predicate places. [2023-08-30 07:28:30,409 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 209 transitions, 2565 flow [2023-08-30 07:28:30,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 146.53333333333333) internal successors, (2198), 15 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:30,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:28:30,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-08-30 07:28:30,419 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 [2023-08-30 07:28:30,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:28:30,610 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:28:30,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:28:30,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1101291657, now seen corresponding path program 1 times [2023-08-30 07:28:30,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:28:30,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946074527] [2023-08-30 07:28:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:28:30,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:28:30,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:28:30,612 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:28:30,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-30 07:28:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:28:30,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:28:30,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:28:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 07:28:30,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:28:30,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:28:30,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946074527] [2023-08-30 07:28:30,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946074527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:28:30,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:28:30,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:28:30,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770865039] [2023-08-30 07:28:30,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:28:30,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:28:30,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:28:30,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:28:30,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:28:31,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 457 [2023-08-30 07:28:31,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 209 transitions, 2565 flow. Second operand has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:31,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:28:31,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 457 [2023-08-30 07:28:31,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:28:46,072 INFO L130 PetriNetUnfolder]: 45330/73058 cut-off events. [2023-08-30 07:28:46,072 INFO L131 PetriNetUnfolder]: For 332689/332801 co-relation queries the response was YES. [2023-08-30 07:28:47,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321963 conditions, 73058 events. 45330/73058 cut-off events. For 332689/332801 co-relation queries the response was YES. Maximal size of possible extension queue 1283. Compared 573998 event pairs, 15036 based on Foata normal form. 504/73422 useless extension candidates. Maximal degree in co-relation 321851. Up to 57317 conditions per place. [2023-08-30 07:28:47,695 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 220 selfloop transitions, 7 changer transitions 5/234 dead transitions. [2023-08-30 07:28:47,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 234 transitions, 3151 flow [2023-08-30 07:28:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:28:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:28:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 929 transitions. [2023-08-30 07:28:47,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40656455142231945 [2023-08-30 07:28:47,697 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 929 transitions. [2023-08-30 07:28:47,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 929 transitions. [2023-08-30 07:28:47,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:28:47,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 929 transitions. [2023-08-30 07:28:47,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:47,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:47,699 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:47,699 INFO L175 Difference]: Start difference. First operand has 241 places, 209 transitions, 2565 flow. Second operand 5 states and 929 transitions. [2023-08-30 07:28:47,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 234 transitions, 3151 flow [2023-08-30 07:28:51,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 234 transitions, 3022 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-30 07:28:51,362 INFO L231 Difference]: Finished difference. Result has 241 places, 211 transitions, 2483 flow [2023-08-30 07:28:51,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2483, PETRI_PLACES=241, PETRI_TRANSITIONS=211} [2023-08-30 07:28:51,362 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 182 predicate places. [2023-08-30 07:28:51,363 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 211 transitions, 2483 flow [2023-08-30 07:28:51,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:51,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:28:51,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-08-30 07:28:51,372 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 (32)] Forceful destruction successful, exit code 0 [2023-08-30 07:28:51,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:28:51,564 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 07:28:51,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:28:51,564 INFO L85 PathProgramCache]: Analyzing trace with hash 872565429, now seen corresponding path program 2 times [2023-08-30 07:28:51,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 07:28:51,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796954960] [2023-08-30 07:28:51,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:28:51,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 07:28:51,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 07:28:51,566 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 07:28:51,566 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 (33)] Waiting until timeout for monitored process [2023-08-30 07:28:51,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:28:51,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:28:51,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:28:51,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:28:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:28:51,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:28:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:28:52,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 07:28:52,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796954960] [2023-08-30 07:28:52,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796954960] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:28:52,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:28:52,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2023-08-30 07:28:52,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218280686] [2023-08-30 07:28:52,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:28:52,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 07:28:52,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 07:28:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 07:28:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 07:28:52,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 457 [2023-08-30 07:28:52,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 211 transitions, 2483 flow. Second operand has 10 states, 10 states have (on average 187.4) internal successors, (1874), 10 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:28:52,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:28:52,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 457 [2023-08-30 07:28:52,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand