./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-min-le-max.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 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:27:29,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:27:29,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:27:29,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:27:29,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:27:29,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:27:29,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:27:29,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:27:29,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:27:29,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:27:29,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:27:29,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:27:29,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:27:29,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:27:29,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:27:29,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:27:29,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:27:29,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:27:29,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:27:29,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:27:29,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:27:29,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:27:29,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:27:29,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:27:29,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:27:29,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:27:29,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:27:29,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:27:29,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:27:29,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:27:29,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:27:29,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:27:29,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:27:29,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:27:29,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:27:29,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:27:29,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:27:29,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:27:29,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:27:29,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:27:29,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:27:29,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:27:29,750 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:27:29,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:27:29,751 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:27:29,751 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:27:29,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:27:29,752 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:27:29,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:27:29,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:27:29,752 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:27:29,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:27:29,753 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:27:29,753 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:27:29,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:27:29,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:27:29,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:27:29,754 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:27:29,754 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:27:29,754 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:27:29,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:27:29,754 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:27:29,754 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:27:29,754 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:27:29,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:27:29,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:27:29,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:27:29,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:27:29,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:27:29,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:27:29,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:27:29,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:27:29,756 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:27:29,756 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:27:29,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:27:29,756 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:27:29,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:27:29,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:27:30,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:27:30,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:27:30,014 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:27:30,014 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:27:30,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c [2023-08-30 00:27:30,938 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:27:31,127 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:27:31,128 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c [2023-08-30 00:27:31,132 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ddcb926/b6e058ff30474cfd8fc98d1cb2d494b2/FLAGa4e72ed70 [2023-08-30 00:27:31,142 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ddcb926/b6e058ff30474cfd8fc98d1cb2d494b2 [2023-08-30 00:27:31,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:27:31,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:27:31,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:27:31,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:27:31,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:27:31,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:27:31" (1/1) ... [2023-08-30 00:27:31,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772d20ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:31, skipping insertion in model container [2023-08-30 00:27:31,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:27:31" (1/1) ... [2023-08-30 00:27:31,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:27:31,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:27:31,258 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2023-08-30 00:27:31,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:27:31,274 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:27:31,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5126d379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:31, skipping insertion in model container [2023-08-30 00:27:31,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:27:31,275 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:27:31,276 INFO L158 Benchmark]: Toolchain (without parser) took 130.92ms. Allocated memory is still 77.6MB. Free memory was 55.2MB in the beginning and 45.7MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:27:31,276 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 54.5MB. Free memory is still 32.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:27:31,277 INFO L158 Benchmark]: CACSL2BoogieTranslator took 129.55ms. Allocated memory is still 77.6MB. Free memory was 55.0MB in the beginning and 45.7MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:27:31,277 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 54.5MB. Free memory is still 32.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 129.55ms. Allocated memory is still 77.6MB. Free memory was 55.0MB in the beginning and 45.7MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 107]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-min-le-max.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 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:27:32,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:27:32,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:27:32,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:27:32,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:27:32,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:27:32,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:27:32,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:27:32,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:27:32,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:27:32,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:27:32,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:27:32,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:27:32,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:27:32,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:27:32,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:27:32,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:27:32,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:27:32,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:27:32,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:27:32,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:27:32,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:27:32,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:27:32,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:27:32,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:27:32,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:27:32,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:27:32,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:27:32,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:27:32,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:27:32,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:27:32,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:27:32,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:27:32,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:27:32,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:27:32,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:27:32,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:27:32,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:27:32,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:27:32,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:27:32,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:27:32,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:27:32,677 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:27:32,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:27:32,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:27:32,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:27:32,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:27:32,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:27:32,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:27:32,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:27:32,680 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:27:32,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:27:32,681 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:27:32,681 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:27:32,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:27:32,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:27:32,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:27:32,681 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:27:32,682 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:27:32,682 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:27:32,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:27:32,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:27:32,682 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:27:32,682 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:27:32,682 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:27:32,683 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:27:32,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:27:32,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:27:32,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:27:32,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:27:32,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:27:32,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:27:32,684 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:27:32,684 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:27:32,684 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:27:32,684 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:27:32,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:27:32,685 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:27:32,685 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:27:32,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:27:32,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:27:32,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:27:32,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:27:32,941 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:27:32,941 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:27:32,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c [2023-08-30 00:27:33,932 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:27:34,090 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:27:34,091 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c [2023-08-30 00:27:34,101 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d920192ab/c3b67c96b4b544b0aad2aedf0024c953/FLAG16311a5f2 [2023-08-30 00:27:34,116 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d920192ab/c3b67c96b4b544b0aad2aedf0024c953 [2023-08-30 00:27:34,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:27:34,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:27:34,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:27:34,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:27:34,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:27:34,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e07024c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34, skipping insertion in model container [2023-08-30 00:27:34,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:27:34,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:27:34,284 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2023-08-30 00:27:34,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:27:34,307 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:27:34,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:27:34,333 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2023-08-30 00:27:34,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:27:34,343 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:27:34,366 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2023-08-30 00:27:34,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:27:34,382 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:27:34,382 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:27:34,386 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:27:34,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34 WrapperNode [2023-08-30 00:27:34,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:27:34,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:27:34,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:27:34,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:27:34,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,423 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-08-30 00:27:34,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:27:34,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:27:34,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:27:34,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:27:34,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,454 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:27:34,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:27:34,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:27:34,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:27:34,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (1/1) ... [2023-08-30 00:27:34,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:27:34,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:27:34,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:27:34,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:27:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:27:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:27:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:27:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:27:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:27:34,510 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:27:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:27:34,510 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:27:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:27:34,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:27:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:27:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:27:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:27:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:27:34,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:27:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:27:34,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:27:34,512 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:27:34,596 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:27:34,598 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:27:34,917 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:27:34,971 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:27:34,971 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 00:27:34,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:27:34 BoogieIcfgContainer [2023-08-30 00:27:34,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:27:34,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:27:34,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:27:34,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:27:34,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:27:34" (1/3) ... [2023-08-30 00:27:34,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff1d33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:27:34, skipping insertion in model container [2023-08-30 00:27:34,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:27:34" (2/3) ... [2023-08-30 00:27:34,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff1d33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:27:34, skipping insertion in model container [2023-08-30 00:27:34,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:27:34" (3/3) ... [2023-08-30 00:27:34,978 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2023-08-30 00:27:34,989 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:27:34,989 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 00:27:34,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:27:35,059 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:27:35,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 168 transitions, 360 flow [2023-08-30 00:27:35,158 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-08-30 00:27:35,158 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:27:35,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 165 events. 10/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 178 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2023-08-30 00:27:35,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 168 transitions, 360 flow [2023-08-30 00:27:35,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 161 transitions, 340 flow [2023-08-30 00:27:35,172 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:27:35,180 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 161 transitions, 340 flow [2023-08-30 00:27:35,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 161 transitions, 340 flow [2023-08-30 00:27:35,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 161 transitions, 340 flow [2023-08-30 00:27:35,220 INFO L130 PetriNetUnfolder]: 10/161 cut-off events. [2023-08-30 00:27:35,220 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:27:35,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 161 events. 10/161 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2023-08-30 00:27:35,222 INFO L119 LiptonReduction]: Number of co-enabled transitions 1742 [2023-08-30 00:27:52,239 INFO L134 LiptonReduction]: Checked pairs total: 2488 [2023-08-30 00:27:52,239 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-08-30 00:27:52,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:27:52,252 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;@79e6f22b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:27:52,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-08-30 00:27:52,254 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:27:52,254 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:27:52,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:52,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:27:52,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:27:52,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:52,258 INFO L85 PathProgramCache]: Analyzing trace with hash 20859, now seen corresponding path program 1 times [2023-08-30 00:27:52,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:52,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708486720] [2023-08-30 00:27:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:27:52,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:52,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:52,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:52,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:27:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:27:52,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:27:52,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:52,451 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:27:52,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:27:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:52,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:27:52,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:52,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708486720] [2023-08-30 00:27:52,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708486720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:27:52,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:27:52,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:27:52,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852311174] [2023-08-30 00:27:52,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:27:52,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:27:52,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:27:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:27:52,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 00:27:52,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:52,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:52,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 00:27:52,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:52,812 INFO L130 PetriNetUnfolder]: 1098/1474 cut-off events. [2023-08-30 00:27:52,812 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 00:27:52,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3023 conditions, 1474 events. 1098/1474 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6057 event pairs, 584 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 2711. Up to 1469 conditions per place. [2023-08-30 00:27:52,823 INFO L137 encePairwiseOnDemand]: 323/333 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 00:27:52,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 174 flow [2023-08-30 00:27:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:27:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:27:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-30 00:27:52,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47047047047047047 [2023-08-30 00:27:52,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-30 00:27:52,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-30 00:27:52,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:52,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-30 00:27:52,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:52,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:52,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:52,852 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 116 flow. Second operand 3 states and 470 transitions. [2023-08-30 00:27:52,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 174 flow [2023-08-30 00:27:52,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:27:52,856 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 88 flow [2023-08-30 00:27:52,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-30 00:27:52,859 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -13 predicate places. [2023-08-30 00:27:52,860 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 88 flow [2023-08-30 00:27:52,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:52,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:52,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:27:52,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:27:53,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:53,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:27:53,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash 20920, now seen corresponding path program 1 times [2023-08-30 00:27:53,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:53,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662443230] [2023-08-30 00:27:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:27:53,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:53,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:53,069 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:53,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:27:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:27:53,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:27:53,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:53,212 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:27:53,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:27:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:53,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:27:53,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:53,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662443230] [2023-08-30 00:27:53,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662443230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:27:53,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:27:53,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:27:53,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278504002] [2023-08-30 00:27:53,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:27:53,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:27:53,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:53,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:27:53,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:27:53,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 00:27:53,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:53,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:53,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 00:27:53,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:53,553 INFO L130 PetriNetUnfolder]: 1098/1473 cut-off events. [2023-08-30 00:27:53,554 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:27:53,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2976 conditions, 1473 events. 1098/1473 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6038 event pairs, 584 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 2970. Up to 1468 conditions per place. [2023-08-30 00:27:53,559 INFO L137 encePairwiseOnDemand]: 331/333 looper letters, 36 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-30 00:27:53,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 160 flow [2023-08-30 00:27:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:27:53,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:27:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-30 00:27:53,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45845845845845845 [2023-08-30 00:27:53,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-30 00:27:53,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-30 00:27:53,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:53,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-30 00:27:53,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:53,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:53,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:53,565 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 88 flow. Second operand 3 states and 458 transitions. [2023-08-30 00:27:53,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 160 flow [2023-08-30 00:27:53,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:27:53,567 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 87 flow [2023-08-30 00:27:53,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-08-30 00:27:53,568 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -13 predicate places. [2023-08-30 00:27:53,568 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 87 flow [2023-08-30 00:27:53,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:53,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:53,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:27:53,577 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 (3)] Ended with exit code 0 [2023-08-30 00:27:53,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:53,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:27:53,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:53,777 INFO L85 PathProgramCache]: Analyzing trace with hash 20924, now seen corresponding path program 1 times [2023-08-30 00:27:53,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:53,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234423060] [2023-08-30 00:27:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:27:53,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:53,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:53,779 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:53,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:27:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:27:53,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:27:53,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:53,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:27:53,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:53,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234423060] [2023-08-30 00:27:53,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234423060] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:27:53,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:27:53,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:27:53,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763923954] [2023-08-30 00:27:53,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:27:53,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:27:53,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:53,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:27:53,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:27:53,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 333 [2023-08-30 00:27:53,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:53,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:53,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 333 [2023-08-30 00:27:53,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:54,120 INFO L130 PetriNetUnfolder]: 1098/1475 cut-off events. [2023-08-30 00:27:54,121 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:27:54,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2981 conditions, 1475 events. 1098/1475 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6041 event pairs, 584 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 2974. Up to 1469 conditions per place. [2023-08-30 00:27:54,127 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-30 00:27:54,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 169 flow [2023-08-30 00:27:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:27:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:27:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-30 00:27:54,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47147147147147145 [2023-08-30 00:27:54,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-30 00:27:54,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-30 00:27:54,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:54,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-30 00:27:54,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:54,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:54,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:54,132 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 87 flow. Second operand 3 states and 471 transitions. [2023-08-30 00:27:54,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 169 flow [2023-08-30 00:27:54,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:27:54,136 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 102 flow [2023-08-30 00:27:54,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-08-30 00:27:54,137 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-30 00:27:54,137 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 102 flow [2023-08-30 00:27:54,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:54,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:54,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:27:54,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:27:54,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:54,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:27:54,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:54,345 INFO L85 PathProgramCache]: Analyzing trace with hash 20860, now seen corresponding path program 1 times [2023-08-30 00:27:54,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:54,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036005503] [2023-08-30 00:27:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:27:54,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:54,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:54,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:54,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:27:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:27:54,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:27:54,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:54,463 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:27:54,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:27:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:54,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:27:54,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:54,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036005503] [2023-08-30 00:27:54,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036005503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:27:54,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:27:54,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:27:54,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445308036] [2023-08-30 00:27:54,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:27:54,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:27:54,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:54,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:27:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:27:54,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 00:27:54,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:54,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:54,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 00:27:54,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:54,776 INFO L130 PetriNetUnfolder]: 1098/1474 cut-off events. [2023-08-30 00:27:54,776 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:27:54,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2987 conditions, 1474 events. 1098/1474 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6046 event pairs, 584 based on Foata normal form. 1/521 useless extension candidates. Maximal degree in co-relation 2978. Up to 1469 conditions per place. [2023-08-30 00:27:54,782 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-30 00:27:54,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 178 flow [2023-08-30 00:27:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:27:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:27:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-30 00:27:54,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624624624624625 [2023-08-30 00:27:54,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-30 00:27:54,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-30 00:27:54,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:54,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-30 00:27:54,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:54,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:54,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:54,792 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 102 flow. Second operand 3 states and 462 transitions. [2023-08-30 00:27:54,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 178 flow [2023-08-30 00:27:54,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 00:27:54,793 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 106 flow [2023-08-30 00:27:54,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-08-30 00:27:54,794 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -9 predicate places. [2023-08-30 00:27:54,794 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 106 flow [2023-08-30 00:27:54,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:54,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:54,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:27:54,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:27:55,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:55,001 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:27:55,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:55,001 INFO L85 PathProgramCache]: Analyzing trace with hash 648798, now seen corresponding path program 1 times [2023-08-30 00:27:55,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:55,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901572440] [2023-08-30 00:27:55,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:27:55,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:55,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:55,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:55,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:27:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:27:55,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:27:55,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:55,118 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2023-08-30 00:27:55,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2023-08-30 00:27:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:27:55,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:27:55,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:55,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901572440] [2023-08-30 00:27:55,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901572440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:27:55,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:27:55,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:27:55,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008129987] [2023-08-30 00:27:55,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:27:55,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:27:55,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:55,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:27:55,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:27:55,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 00:27:55,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:55,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:55,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 00:27:55,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:55,447 INFO L130 PetriNetUnfolder]: 913/1238 cut-off events. [2023-08-30 00:27:55,448 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:27:55,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 1238 events. 913/1238 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4995 event pairs, 479 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 2506. Up to 1233 conditions per place. [2023-08-30 00:27:55,453 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 00:27:55,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 172 flow [2023-08-30 00:27:55,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:27:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:27:55,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-08-30 00:27:55,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46046046046046046 [2023-08-30 00:27:55,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-08-30 00:27:55,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-08-30 00:27:55,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:55,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-08-30 00:27:55,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:55,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:55,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:55,458 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 106 flow. Second operand 3 states and 460 transitions. [2023-08-30 00:27:55,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 172 flow [2023-08-30 00:27:55,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:27:55,459 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 98 flow [2023-08-30 00:27:55,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-08-30 00:27:55,461 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-30 00:27:55,461 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 98 flow [2023-08-30 00:27:55,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:55,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:55,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:27:55,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:27:55,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:55,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:27:55,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:55,669 INFO L85 PathProgramCache]: Analyzing trace with hash 648795, now seen corresponding path program 1 times [2023-08-30 00:27:55,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:55,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717729293] [2023-08-30 00:27:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:27:55,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:55,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:55,670 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:55,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:27:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:27:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:27:55,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:27:55,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:27:55,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:27:55,825 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 00:27:55,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 00:27:55,841 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:27:55,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:27:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:56,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:27:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:56,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:56,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717729293] [2023-08-30 00:27:56,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717729293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:27:56,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:27:56,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:27:56,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016426511] [2023-08-30 00:27:56,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:27:56,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:27:56,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:56,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:27:56,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:27:56,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:27:56,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:56,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:56,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:27:56,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:57,331 INFO L130 PetriNetUnfolder]: 1633/2234 cut-off events. [2023-08-30 00:27:57,331 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:27:57,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4542 conditions, 2234 events. 1633/2234 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 10144 event pairs, 850 based on Foata normal form. 0/848 useless extension candidates. Maximal degree in co-relation 4531. Up to 1221 conditions per place. [2023-08-30 00:27:57,340 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 65 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2023-08-30 00:27:57,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 346 flow [2023-08-30 00:27:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:27:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:27:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1002 transitions. [2023-08-30 00:27:57,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42985842985842987 [2023-08-30 00:27:57,343 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1002 transitions. [2023-08-30 00:27:57,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1002 transitions. [2023-08-30 00:27:57,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:57,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1002 transitions. [2023-08-30 00:27:57,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.14285714285714) internal successors, (1002), 7 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:57,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:57,348 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:57,348 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 98 flow. Second operand 7 states and 1002 transitions. [2023-08-30 00:27:57,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 346 flow [2023-08-30 00:27:57,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:27:57,350 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 160 flow [2023-08-30 00:27:57,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=160, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-30 00:27:57,350 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2023-08-30 00:27:57,350 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 160 flow [2023-08-30 00:27:57,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:57,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:57,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:27:57,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:27:57,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:57,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:27:57,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash 648734, now seen corresponding path program 1 times [2023-08-30 00:27:57,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:57,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280077759] [2023-08-30 00:27:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:27:57,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:57,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:57,560 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:57,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:27:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:27:57,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:27:57,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:57,681 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:27:57,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:27:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:57,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:27:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:57,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:57,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280077759] [2023-08-30 00:27:57,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280077759] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:27:57,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:27:57,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:27:57,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180100290] [2023-08-30 00:27:57,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:27:57,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:27:57,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:57,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:27:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:27:58,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-08-30 00:27:58,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:58,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:27:58,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-08-30 00:27:58,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:27:58,834 INFO L130 PetriNetUnfolder]: 1632/2231 cut-off events. [2023-08-30 00:27:58,834 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 00:27:58,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4606 conditions, 2231 events. 1632/2231 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 10035 event pairs, 850 based on Foata normal form. 3/901 useless extension candidates. Maximal degree in co-relation 4591. Up to 1221 conditions per place. [2023-08-30 00:27:58,843 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 63 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2023-08-30 00:27:58,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 368 flow [2023-08-30 00:27:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:27:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:27:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 890 transitions. [2023-08-30 00:27:58,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44544544544544545 [2023-08-30 00:27:58,846 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 890 transitions. [2023-08-30 00:27:58,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 890 transitions. [2023-08-30 00:27:58,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:27:58,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 890 transitions. [2023-08-30 00:27:58,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.33333333333334) internal successors, (890), 6 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:58,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:58,851 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:58,851 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 160 flow. Second operand 6 states and 890 transitions. [2023-08-30 00:27:58,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 368 flow [2023-08-30 00:27:58,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 352 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 00:27:58,854 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 154 flow [2023-08-30 00:27:58,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-08-30 00:27:58,855 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2023-08-30 00:27:58,855 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 154 flow [2023-08-30 00:27:58,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:27:58,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:27:58,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:27:58,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:27:59,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:59,062 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:27:59,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:27:59,063 INFO L85 PathProgramCache]: Analyzing trace with hash 623508582, now seen corresponding path program 1 times [2023-08-30 00:27:59,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:27:59,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145328076] [2023-08-30 00:27:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:27:59,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:27:59,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:27:59,064 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:27:59,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:27:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:27:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:27:59,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:27:59,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:27:59,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:27:59,216 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-30 00:27:59,217 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 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-30 00:27:59,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 00:27:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:59,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:27:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:27:59,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:27:59,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145328076] [2023-08-30 00:27:59,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145328076] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:27:59,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:27:59,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:27:59,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177371109] [2023-08-30 00:27:59,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:27:59,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:27:59,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:27:59,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:27:59,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:28:00,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:28:00,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 154 flow. Second operand has 8 states, 8 states have (on average 133.25) internal successors, (1066), 8 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:00,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:00,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:28:00,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:00,598 INFO L130 PetriNetUnfolder]: 1576/2145 cut-off events. [2023-08-30 00:28:00,598 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 00:28:00,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4434 conditions, 2145 events. 1576/2145 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 9568 event pairs, 818 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 4419. Up to 1182 conditions per place. [2023-08-30 00:28:00,606 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 64 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-30 00:28:00,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 352 flow [2023-08-30 00:28:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:28:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:28:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 727 transitions. [2023-08-30 00:28:00,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43663663663663665 [2023-08-30 00:28:00,608 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 727 transitions. [2023-08-30 00:28:00,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 727 transitions. [2023-08-30 00:28:00,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:00,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 727 transitions. [2023-08-30 00:28:00,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.4) internal successors, (727), 5 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 00:28:00,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:00,611 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:00,611 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 154 flow. Second operand 5 states and 727 transitions. [2023-08-30 00:28:00,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 352 flow [2023-08-30 00:28:00,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 69 transitions, 333 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 00:28:00,613 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 137 flow [2023-08-30 00:28:00,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-08-30 00:28:00,613 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2023-08-30 00:28:00,613 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 137 flow [2023-08-30 00:28:00,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.25) internal successors, (1066), 8 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:00,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:00,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:28:00,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:00,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:00,821 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:00,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:00,822 INFO L85 PathProgramCache]: Analyzing trace with hash 623508581, now seen corresponding path program 1 times [2023-08-30 00:28:00,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:00,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88258001] [2023-08-30 00:28:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:28:00,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:00,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:00,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:00,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:28:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:28:00,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:28:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:00,938 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:28:00,938 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 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-30 00:28:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:28:01,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:28:01,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:01,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88258001] [2023-08-30 00:28:01,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88258001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:28:01,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:28:01,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:28:01,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178271500] [2023-08-30 00:28:01,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:28:01,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:28:01,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:01,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:28:01,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:28:01,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 333 [2023-08-30 00:28:01,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:01,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:01,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 333 [2023-08-30 00:28:01,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:01,295 INFO L130 PetriNetUnfolder]: 1530/2069 cut-off events. [2023-08-30 00:28:01,295 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 00:28:01,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4276 conditions, 2069 events. 1530/2069 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9316 event pairs, 789 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 4261. Up to 2059 conditions per place. [2023-08-30 00:28:01,304 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 36 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-30 00:28:01,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 39 transitions, 207 flow [2023-08-30 00:28:01,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:28:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:28:01,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-08-30 00:28:01,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45645645645645644 [2023-08-30 00:28:01,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-08-30 00:28:01,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-08-30 00:28:01,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:01,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-08-30 00:28:01,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:01,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:01,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:01,309 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 137 flow. Second operand 3 states and 456 transitions. [2023-08-30 00:28:01,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 39 transitions, 207 flow [2023-08-30 00:28:01,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 39 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:28:01,310 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 130 flow [2023-08-30 00:28:01,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-08-30 00:28:01,311 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -6 predicate places. [2023-08-30 00:28:01,311 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 130 flow [2023-08-30 00:28:01,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:01,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:01,312 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:28:01,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:01,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:01,518 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:01,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:01,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2146342343, now seen corresponding path program 2 times [2023-08-30 00:28:01,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:01,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344635573] [2023-08-30 00:28:01,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:28:01,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:01,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:01,520 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:01,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:28:01,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:28:01,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:28:01,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:28:01,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:01,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:28:01,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:28:01,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:28:01,651 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 00:28:01,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 00:28:01,670 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:28:01,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:28:01,745 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 00:28:01,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:28:01,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:01,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344635573] [2023-08-30 00:28:01,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344635573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:28:01,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:28:01,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:28:01,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771761701] [2023-08-30 00:28:01,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:28:01,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:28:01,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:01,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:28:01,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:28:01,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 00:28:01,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:01,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:01,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 00:28:01,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:02,061 INFO L130 PetriNetUnfolder]: 1530/2068 cut-off events. [2023-08-30 00:28:02,061 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 00:28:02,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4271 conditions, 2068 events. 1530/2068 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9259 event pairs, 789 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 4256. Up to 2058 conditions per place. [2023-08-30 00:28:02,068 INFO L137 encePairwiseOnDemand]: 331/333 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 00:28:02,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 38 transitions, 197 flow [2023-08-30 00:28:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:28:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:28:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-08-30 00:28:02,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44544544544544545 [2023-08-30 00:28:02,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-08-30 00:28:02,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-08-30 00:28:02,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:02,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-08-30 00:28:02,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:02,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:02,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:02,073 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 130 flow. Second operand 3 states and 445 transitions. [2023-08-30 00:28:02,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 38 transitions, 197 flow [2023-08-30 00:28:02,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 38 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:28:02,078 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 126 flow [2023-08-30 00:28:02,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-30 00:28:02,079 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -7 predicate places. [2023-08-30 00:28:02,079 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 126 flow [2023-08-30 00:28:02,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:02,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:02,079 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:28:02,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:02,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:02,286 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:02,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2146342404, now seen corresponding path program 2 times [2023-08-30 00:28:02,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:02,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794992804] [2023-08-30 00:28:02,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:28:02,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:02,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:02,287 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:02,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:28:02,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:28:02,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:28:02,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:28:02,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:02,417 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:28:02,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:28:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:02,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:28:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:02,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:02,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794992804] [2023-08-30 00:28:02,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794992804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:28:02,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:28:02,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:28:02,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476650541] [2023-08-30 00:28:02,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:28:02,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:28:02,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:28:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:28:05,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 00:28:05,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 126 flow. Second operand has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:05,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:05,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 00:28:05,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:08,077 INFO L130 PetriNetUnfolder]: 6596/8886 cut-off events. [2023-08-30 00:28:08,077 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2023-08-30 00:28:08,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18375 conditions, 8886 events. 6596/8886 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 46971 event pairs, 3450 based on Foata normal form. 6/3748 useless extension candidates. Maximal degree in co-relation 18359. Up to 1134 conditions per place. [2023-08-30 00:28:08,105 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 217 selfloop transitions, 13 changer transitions 0/232 dead transitions. [2023-08-30 00:28:08,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 232 transitions, 1064 flow [2023-08-30 00:28:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:28:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:28:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1880 transitions. [2023-08-30 00:28:08,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47047047047047047 [2023-08-30 00:28:08,110 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1880 transitions. [2023-08-30 00:28:08,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1880 transitions. [2023-08-30 00:28:08,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:08,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1880 transitions. [2023-08-30 00:28:08,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:08,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:08,117 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:08,117 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 126 flow. Second operand 12 states and 1880 transitions. [2023-08-30 00:28:08,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 232 transitions, 1064 flow [2023-08-30 00:28:08,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 232 transitions, 1063 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:28:08,126 INFO L231 Difference]: Finished difference. Result has 66 places, 46 transitions, 221 flow [2023-08-30 00:28:08,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=221, PETRI_PLACES=66, PETRI_TRANSITIONS=46} [2023-08-30 00:28:08,127 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-30 00:28:08,127 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 46 transitions, 221 flow [2023-08-30 00:28:08,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:08,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:08,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:28:08,136 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 (12)] Ended with exit code 0 [2023-08-30 00:28:08,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:08,334 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:08,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:08,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2146075218, now seen corresponding path program 1 times [2023-08-30 00:28:08,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:08,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817402746] [2023-08-30 00:28:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:28:08,335 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 00:28:08,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:08,336 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:08,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:28:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:28:08,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:28:08,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:28:08,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:28:08,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:08,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817402746] [2023-08-30 00:28:08,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817402746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:28:08,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:28:08,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:28:08,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702127225] [2023-08-30 00:28:08,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:28:08,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:28:08,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:08,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:28:08,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:28:08,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 00:28:08,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 46 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:08,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:08,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 00:28:08,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:09,468 INFO L130 PetriNetUnfolder]: 9131/12879 cut-off events. [2023-08-30 00:28:09,469 INFO L131 PetriNetUnfolder]: For 477/477 co-relation queries the response was YES. [2023-08-30 00:28:09,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26791 conditions, 12879 events. 9131/12879 cut-off events. For 477/477 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 77220 event pairs, 2863 based on Foata normal form. 0/6121 useless extension candidates. Maximal degree in co-relation 26767. Up to 7837 conditions per place. [2023-08-30 00:28:09,511 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 61 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2023-08-30 00:28:09,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 414 flow [2023-08-30 00:28:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:28:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:28:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 746 transitions. [2023-08-30 00:28:09,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44804804804804804 [2023-08-30 00:28:09,514 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 746 transitions. [2023-08-30 00:28:09,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 746 transitions. [2023-08-30 00:28:09,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:09,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 746 transitions. [2023-08-30 00:28:09,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:09,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:09,517 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:09,517 INFO L175 Difference]: Start difference. First operand has 66 places, 46 transitions, 221 flow. Second operand 5 states and 746 transitions. [2023-08-30 00:28:09,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 414 flow [2023-08-30 00:28:09,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 398 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 00:28:09,522 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 229 flow [2023-08-30 00:28:09,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2023-08-30 00:28:09,522 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2023-08-30 00:28:09,522 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 229 flow [2023-08-30 00:28:09,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:09,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:09,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:28:09,531 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 (13)] Ended with exit code 0 [2023-08-30 00:28:09,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:09,730 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:09,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:09,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2146075219, now seen corresponding path program 1 times [2023-08-30 00:28:09,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:09,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731495028] [2023-08-30 00:28:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:28:09,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:09,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:09,731 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:09,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:28:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:28:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:28:09,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:09,865 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:28:09,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:28:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:28:09,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:28:09,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:09,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731495028] [2023-08-30 00:28:09,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731495028] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:28:09,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:28:09,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:28:09,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683501383] [2023-08-30 00:28:09,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:28:09,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:28:09,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:09,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:28:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:28:10,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-08-30 00:28:10,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:10,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:10,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-08-30 00:28:10,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:10,537 INFO L130 PetriNetUnfolder]: 4547/6631 cut-off events. [2023-08-30 00:28:10,537 INFO L131 PetriNetUnfolder]: For 828/1132 co-relation queries the response was YES. [2023-08-30 00:28:10,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15102 conditions, 6631 events. 4547/6631 cut-off events. For 828/1132 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38934 event pairs, 2910 based on Foata normal form. 304/4487 useless extension candidates. Maximal degree in co-relation 15076. Up to 6586 conditions per place. [2023-08-30 00:28:10,563 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 37 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2023-08-30 00:28:10,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 45 transitions, 311 flow [2023-08-30 00:28:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:28:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:28:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 562 transitions. [2023-08-30 00:28:10,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219219219219219 [2023-08-30 00:28:10,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 562 transitions. [2023-08-30 00:28:10,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 562 transitions. [2023-08-30 00:28:10,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:10,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 562 transitions. [2023-08-30 00:28:10,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:10,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:10,568 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:10,568 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 229 flow. Second operand 4 states and 562 transitions. [2023-08-30 00:28:10,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 45 transitions, 311 flow [2023-08-30 00:28:10,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 45 transitions, 297 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:28:10,570 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 223 flow [2023-08-30 00:28:10,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2023-08-30 00:28:10,571 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2023-08-30 00:28:10,571 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 223 flow [2023-08-30 00:28:10,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:10,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:10,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:28:10,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:10,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:10,782 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:10,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:10,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2103661452, now seen corresponding path program 1 times [2023-08-30 00:28:10,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:10,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157050350] [2023-08-30 00:28:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:28:10,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:10,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:10,785 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:10,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:28:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:28:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:28:10,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:10,958 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:28:10,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:28:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:11,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:28:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:11,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:11,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157050350] [2023-08-30 00:28:11,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157050350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:28:11,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:28:11,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:28:11,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561552629] [2023-08-30 00:28:11,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:28:11,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:28:11,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:11,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:28:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:28:12,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:28:12,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 223 flow. Second operand has 8 states, 8 states have (on average 133.75) internal successors, (1070), 8 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:12,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:12,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:28:12,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:12,594 INFO L130 PetriNetUnfolder]: 4123/6015 cut-off events. [2023-08-30 00:28:12,594 INFO L131 PetriNetUnfolder]: For 764/1044 co-relation queries the response was YES. [2023-08-30 00:28:12,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13446 conditions, 6015 events. 4123/6015 cut-off events. For 764/1044 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34914 event pairs, 2654 based on Foata normal form. 280/4254 useless extension candidates. Maximal degree in co-relation 13420. Up to 5368 conditions per place. [2023-08-30 00:28:12,611 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 61 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-08-30 00:28:12,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 413 flow [2023-08-30 00:28:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:28:12,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:28:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 714 transitions. [2023-08-30 00:28:12,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42882882882882883 [2023-08-30 00:28:12,614 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 714 transitions. [2023-08-30 00:28:12,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 714 transitions. [2023-08-30 00:28:12,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:12,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 714 transitions. [2023-08-30 00:28:12,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.8) internal successors, (714), 5 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 00:28:12,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:12,617 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:12,617 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 223 flow. Second operand 5 states and 714 transitions. [2023-08-30 00:28:12,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 413 flow [2023-08-30 00:28:12,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:28:12,619 INFO L231 Difference]: Finished difference. Result has 65 places, 43 transitions, 218 flow [2023-08-30 00:28:12,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=65, PETRI_TRANSITIONS=43} [2023-08-30 00:28:12,620 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2023-08-30 00:28:12,620 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 43 transitions, 218 flow [2023-08-30 00:28:12,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.75) internal successors, (1070), 8 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:12,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:12,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:28:12,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:12,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:12,829 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:12,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:12,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2103819565, now seen corresponding path program 1 times [2023-08-30 00:28:12,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:12,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377017655] [2023-08-30 00:28:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:28:12,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:12,831 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:12,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:28:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:28:12,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:28:12,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:12,971 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:28:12,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:28:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:28:13,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:28:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:28:13,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:13,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377017655] [2023-08-30 00:28:13,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377017655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:28:13,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:28:13,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:28:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446252673] [2023-08-30 00:28:13,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:28:13,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:28:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:13,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:28:13,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:28:14,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:28:14,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 43 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 133.4) internal successors, (1334), 10 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:14,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:14,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:28:14,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:16,336 INFO L130 PetriNetUnfolder]: 7763/10831 cut-off events. [2023-08-30 00:28:16,337 INFO L131 PetriNetUnfolder]: For 1231/1231 co-relation queries the response was YES. [2023-08-30 00:28:16,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24664 conditions, 10831 events. 7763/10831 cut-off events. For 1231/1231 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 64121 event pairs, 846 based on Foata normal form. 296/7791 useless extension candidates. Maximal degree in co-relation 24638. Up to 3136 conditions per place. [2023-08-30 00:28:16,368 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 86 selfloop transitions, 13 changer transitions 0/100 dead transitions. [2023-08-30 00:28:16,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 555 flow [2023-08-30 00:28:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:28:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:28:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1145 transitions. [2023-08-30 00:28:16,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298048048048048 [2023-08-30 00:28:16,371 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1145 transitions. [2023-08-30 00:28:16,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1145 transitions. [2023-08-30 00:28:16,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:16,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1145 transitions. [2023-08-30 00:28:16,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 143.125) internal successors, (1145), 8 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:16,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:16,376 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:16,376 INFO L175 Difference]: Start difference. First operand has 65 places, 43 transitions, 218 flow. Second operand 8 states and 1145 transitions. [2023-08-30 00:28:16,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 555 flow [2023-08-30 00:28:16,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 548 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 00:28:16,380 INFO L231 Difference]: Finished difference. Result has 74 places, 48 transitions, 286 flow [2023-08-30 00:28:16,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=286, PETRI_PLACES=74, PETRI_TRANSITIONS=48} [2023-08-30 00:28:16,380 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2023-08-30 00:28:16,380 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 48 transitions, 286 flow [2023-08-30 00:28:16,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 133.4) internal successors, (1334), 10 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:16,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:16,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:28:16,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:16,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:16,590 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:16,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2103661454, now seen corresponding path program 1 times [2023-08-30 00:28:16,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:16,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446755690] [2023-08-30 00:28:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:28:16,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:16,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:16,592 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:16,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:28:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:28:16,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:28:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:16,723 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:28:16,724 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 29 [2023-08-30 00:28:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:28:16,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:28:16,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:16,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446755690] [2023-08-30 00:28:16,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446755690] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:28:16,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:28:16,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:28:16,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367730718] [2023-08-30 00:28:16,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:28:16,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:28:16,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:16,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:28:16,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:28:16,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 00:28:16,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 48 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:16,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:16,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 00:28:16,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:17,410 INFO L130 PetriNetUnfolder]: 6323/8815 cut-off events. [2023-08-30 00:28:17,410 INFO L131 PetriNetUnfolder]: For 9953/10913 co-relation queries the response was YES. [2023-08-30 00:28:17,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25582 conditions, 8815 events. 6323/8815 cut-off events. For 9953/10913 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 48196 event pairs, 3880 based on Foata normal form. 960/7559 useless extension candidates. Maximal degree in co-relation 25551. Up to 8791 conditions per place. [2023-08-30 00:28:17,441 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 43 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-30 00:28:17,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 46 transitions, 370 flow [2023-08-30 00:28:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:28:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:28:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-30 00:28:17,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44044044044044045 [2023-08-30 00:28:17,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-30 00:28:17,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-30 00:28:17,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:17,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-30 00:28:17,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:17,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:17,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:17,445 INFO L175 Difference]: Start difference. First operand has 74 places, 48 transitions, 286 flow. Second operand 3 states and 440 transitions. [2023-08-30 00:28:17,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 46 transitions, 370 flow [2023-08-30 00:28:17,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 46 transitions, 353 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 00:28:17,452 INFO L231 Difference]: Finished difference. Result has 71 places, 46 transitions, 267 flow [2023-08-30 00:28:17,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=71, PETRI_TRANSITIONS=46} [2023-08-30 00:28:17,453 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2023-08-30 00:28:17,453 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 46 transitions, 267 flow [2023-08-30 00:28:17,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:17,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:17,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:28:17,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:17,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:17,657 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:17,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:17,657 INFO L85 PathProgramCache]: Analyzing trace with hash -789000095, now seen corresponding path program 1 times [2023-08-30 00:28:17,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:17,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794734373] [2023-08-30 00:28:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:28:17,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:17,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:17,658 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:17,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:28:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:28:17,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:28:17,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:28:17,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:28:17,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:17,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794734373] [2023-08-30 00:28:17,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794734373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:28:17,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:28:17,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:28:17,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453737449] [2023-08-30 00:28:17,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:28:17,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:28:17,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:17,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:28:17,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:28:17,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 333 [2023-08-30 00:28:17,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 46 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:17,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:17,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 333 [2023-08-30 00:28:17,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:18,783 INFO L130 PetriNetUnfolder]: 7843/11551 cut-off events. [2023-08-30 00:28:18,783 INFO L131 PetriNetUnfolder]: For 14754/16242 co-relation queries the response was YES. [2023-08-30 00:28:18,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33274 conditions, 11551 events. 7843/11551 cut-off events. For 14754/16242 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 67296 event pairs, 3920 based on Foata normal form. 1488/11351 useless extension candidates. Maximal degree in co-relation 33243. Up to 7746 conditions per place. [2023-08-30 00:28:18,828 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 59 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2023-08-30 00:28:18,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 68 transitions, 490 flow [2023-08-30 00:28:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:28:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:28:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 732 transitions. [2023-08-30 00:28:18,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43963963963963965 [2023-08-30 00:28:18,830 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 732 transitions. [2023-08-30 00:28:18,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 732 transitions. [2023-08-30 00:28:18,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:18,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 732 transitions. [2023-08-30 00:28:18,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.4) internal successors, (732), 5 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 00:28:18,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:18,833 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:18,833 INFO L175 Difference]: Start difference. First operand has 71 places, 46 transitions, 267 flow. Second operand 5 states and 732 transitions. [2023-08-30 00:28:18,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 68 transitions, 490 flow [2023-08-30 00:28:18,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 68 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:28:18,843 INFO L231 Difference]: Finished difference. Result has 75 places, 47 transitions, 290 flow [2023-08-30 00:28:18,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=75, PETRI_TRANSITIONS=47} [2023-08-30 00:28:18,843 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2023-08-30 00:28:18,843 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 47 transitions, 290 flow [2023-08-30 00:28:18,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:18,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:18,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:28:18,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:28:19,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:19,050 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:19,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:19,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1310804027, now seen corresponding path program 1 times [2023-08-30 00:28:19,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:19,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110032441] [2023-08-30 00:28:19,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:28:19,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:19,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:19,052 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:28:19,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:28:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:28:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:28:19,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:19,190 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:28:19,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:28:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:28:19,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:28:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:28:19,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110032441] [2023-08-30 00:28:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110032441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:28:19,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:28:19,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:28:19,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928186270] [2023-08-30 00:28:19,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:28:19,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:28:19,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:28:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:28:20,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:28:20,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 47 transitions, 290 flow. Second operand has 10 states, 10 states have (on average 133.8) internal successors, (1338), 10 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:20,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:20,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:28:20,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:22,892 INFO L130 PetriNetUnfolder]: 12767/18155 cut-off events. [2023-08-30 00:28:22,892 INFO L131 PetriNetUnfolder]: For 26051/28283 co-relation queries the response was YES. [2023-08-30 00:28:22,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55780 conditions, 18155 events. 12767/18155 cut-off events. For 26051/28283 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 105875 event pairs, 2806 based on Foata normal form. 2792/20379 useless extension candidates. Maximal degree in co-relation 55747. Up to 5790 conditions per place. [2023-08-30 00:28:22,969 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 107 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2023-08-30 00:28:22,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 858 flow [2023-08-30 00:28:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:28:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:28:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1136 transitions. [2023-08-30 00:28:22,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264264264264264 [2023-08-30 00:28:22,973 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1136 transitions. [2023-08-30 00:28:22,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1136 transitions. [2023-08-30 00:28:22,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:22,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1136 transitions. [2023-08-30 00:28:22,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:22,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:22,977 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 333.0) internal successors, (2997), 9 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:22,977 INFO L175 Difference]: Start difference. First operand has 75 places, 47 transitions, 290 flow. Second operand 8 states and 1136 transitions. [2023-08-30 00:28:22,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 858 flow [2023-08-30 00:28:22,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 842 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 00:28:22,991 INFO L231 Difference]: Finished difference. Result has 84 places, 52 transitions, 349 flow [2023-08-30 00:28:22,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=349, PETRI_PLACES=84, PETRI_TRANSITIONS=52} [2023-08-30 00:28:22,992 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 28 predicate places. [2023-08-30 00:28:22,992 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 52 transitions, 349 flow [2023-08-30 00:28:22,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 133.8) internal successors, (1338), 10 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:22,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:22,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:28:22,999 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 (19)] Ended with exit code 0 [2023-08-30 00:28:23,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:23,199 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:23,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash -865475016, now seen corresponding path program 1 times [2023-08-30 00:28:23,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:23,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689440527] [2023-08-30 00:28:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:28:23,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:23,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:23,201 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 00:28:23,203 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 00:28:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:28:23,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:28:23,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:28:23,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:28:23,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:23,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689440527] [2023-08-30 00:28:23,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689440527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:28:23,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:28:23,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:28:23,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876139975] [2023-08-30 00:28:23,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:28:23,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:28:23,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:23,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:28:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:28:23,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-08-30 00:28:23,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 52 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:23,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:23,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-08-30 00:28:23,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:24,360 INFO L130 PetriNetUnfolder]: 8811/12759 cut-off events. [2023-08-30 00:28:24,361 INFO L131 PetriNetUnfolder]: For 30462/33726 co-relation queries the response was YES. [2023-08-30 00:28:24,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47567 conditions, 12759 events. 8811/12759 cut-off events. For 30462/33726 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 71047 event pairs, 6264 based on Foata normal form. 4160/16911 useless extension candidates. Maximal degree in co-relation 47529. Up to 12735 conditions per place. [2023-08-30 00:28:24,430 INFO L137 encePairwiseOnDemand]: 331/333 looper letters, 48 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 00:28:24,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 51 transitions, 443 flow [2023-08-30 00:28:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:28:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:28:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-08-30 00:28:24,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-30 00:28:24,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-08-30 00:28:24,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-08-30 00:28:24,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:24,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-08-30 00:28:24,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:24,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:24,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:24,434 INFO L175 Difference]: Start difference. First operand has 84 places, 52 transitions, 349 flow. Second operand 3 states and 444 transitions. [2023-08-30 00:28:24,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 51 transitions, 443 flow [2023-08-30 00:28:24,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 51 transitions, 424 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 00:28:24,462 INFO L231 Difference]: Finished difference. Result has 81 places, 51 transitions, 328 flow [2023-08-30 00:28:24,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=79, 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=328, PETRI_PLACES=81, PETRI_TRANSITIONS=51} [2023-08-30 00:28:24,463 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2023-08-30 00:28:24,463 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 51 transitions, 328 flow [2023-08-30 00:28:24,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:24,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:24,463 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:28:24,474 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 00:28:24,670 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 00:28:24,670 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:24,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1571823342, now seen corresponding path program 2 times [2023-08-30 00:28:24,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:24,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438332188] [2023-08-30 00:28:24,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:28:24,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:24,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:24,672 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 00:28:24,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:28:24,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:28:24,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:28:24,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:28:24,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:24,847 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:28:24,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:28:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:25,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:28:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:25,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:25,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438332188] [2023-08-30 00:28:25,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438332188] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:28:25,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:28:25,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:28:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259955400] [2023-08-30 00:28:25,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:28:25,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:28:25,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:25,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:28:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:28:33,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 00:28:33,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 51 transitions, 328 flow. Second operand has 18 states, 18 states have (on average 129.11111111111111) internal successors, (2324), 18 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:33,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:33,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 00:28:33,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:41,080 INFO L130 PetriNetUnfolder]: 9731/14252 cut-off events. [2023-08-30 00:28:41,080 INFO L131 PetriNetUnfolder]: For 32629/34613 co-relation queries the response was YES. [2023-08-30 00:28:41,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50633 conditions, 14252 events. 9731/14252 cut-off events. For 32629/34613 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 83310 event pairs, 3376 based on Foata normal form. 2134/16386 useless extension candidates. Maximal degree in co-relation 50596. Up to 5621 conditions per place. [2023-08-30 00:28:41,147 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 270 selfloop transitions, 24 changer transitions 0/295 dead transitions. [2023-08-30 00:28:41,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 295 transitions, 2037 flow [2023-08-30 00:28:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:28:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:28:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2630 transitions. [2023-08-30 00:28:41,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156788367314683 [2023-08-30 00:28:41,152 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2630 transitions. [2023-08-30 00:28:41,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2630 transitions. [2023-08-30 00:28:41,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:41,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2630 transitions. [2023-08-30 00:28:41,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 138.42105263157896) internal successors, (2630), 19 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:41,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:41,161 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 333.0) internal successors, (6660), 20 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:41,161 INFO L175 Difference]: Start difference. First operand has 81 places, 51 transitions, 328 flow. Second operand 19 states and 2630 transitions. [2023-08-30 00:28:41,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 295 transitions, 2037 flow [2023-08-30 00:28:41,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 295 transitions, 2036 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:28:41,197 INFO L231 Difference]: Finished difference. Result has 103 places, 66 transitions, 509 flow [2023-08-30 00:28:41,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=509, PETRI_PLACES=103, PETRI_TRANSITIONS=66} [2023-08-30 00:28:41,198 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2023-08-30 00:28:41,198 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 66 transitions, 509 flow [2023-08-30 00:28:41,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 129.11111111111111) internal successors, (2324), 18 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:41,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:41,199 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-08-30 00:28:41,206 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 00:28:41,403 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 00:28:41,403 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:41,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:41,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1581927217, now seen corresponding path program 3 times [2023-08-30 00:28:41,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:41,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497657904] [2023-08-30 00:28:41,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:28:41,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:41,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:41,405 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 00:28:41,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:28:41,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:28:41,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:28:41,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:28:41,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:41,630 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:28:41,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:28:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:41,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:28:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:42,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:42,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497657904] [2023-08-30 00:28:42,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497657904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:28:42,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:28:42,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 00:28:42,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348127367] [2023-08-30 00:28:42,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:28:42,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:28:42,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:28:42,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:28:48,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-08-30 00:28:48,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 66 transitions, 509 flow. Second operand has 20 states, 20 states have (on average 131.15) internal successors, (2623), 20 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:48,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:28:48,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-08-30 00:28:48,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:28:56,794 INFO L130 PetriNetUnfolder]: 8721/12939 cut-off events. [2023-08-30 00:28:56,794 INFO L131 PetriNetUnfolder]: For 38051/39907 co-relation queries the response was YES. [2023-08-30 00:28:56,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49936 conditions, 12939 events. 8721/12939 cut-off events. For 38051/39907 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 75608 event pairs, 3304 based on Foata normal form. 2006/14945 useless extension candidates. Maximal degree in co-relation 49893. Up to 6370 conditions per place. [2023-08-30 00:28:56,855 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 307 selfloop transitions, 27 changer transitions 0/335 dead transitions. [2023-08-30 00:28:56,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 335 transitions, 2417 flow [2023-08-30 00:28:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 00:28:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 00:28:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2954 transitions. [2023-08-30 00:28:56,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42242242242242245 [2023-08-30 00:28:56,860 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2954 transitions. [2023-08-30 00:28:56,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2954 transitions. [2023-08-30 00:28:56,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:28:56,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2954 transitions. [2023-08-30 00:28:56,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 140.66666666666666) internal successors, (2954), 21 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:56,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:56,868 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:56,869 INFO L175 Difference]: Start difference. First operand has 103 places, 66 transitions, 509 flow. Second operand 21 states and 2954 transitions. [2023-08-30 00:28:56,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 335 transitions, 2417 flow [2023-08-30 00:28:56,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 335 transitions, 2338 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-08-30 00:28:56,967 INFO L231 Difference]: Finished difference. Result has 124 places, 74 transitions, 616 flow [2023-08-30 00:28:56,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=616, PETRI_PLACES=124, PETRI_TRANSITIONS=74} [2023-08-30 00:28:56,967 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2023-08-30 00:28:56,967 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 74 transitions, 616 flow [2023-08-30 00:28:56,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 131.15) internal successors, (2623), 20 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:28:56,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:28:56,968 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:28:56,977 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 00:28:57,170 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 00:28:57,170 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:28:57,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:28:57,173 INFO L85 PathProgramCache]: Analyzing trace with hash 323286753, now seen corresponding path program 2 times [2023-08-30 00:28:57,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:28:57,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653450976] [2023-08-30 00:28:57,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:28:57,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:28:57,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:28:57,177 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 00:28:57,178 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 00:28:57,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:28:57,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:28:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:28:57,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:28:57,350 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:28:57,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:28:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:57,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:28:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:28:58,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:28:58,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653450976] [2023-08-30 00:28:58,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653450976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:28:58,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:28:58,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:28:58,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760991338] [2023-08-30 00:28:58,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:28:58,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 00:28:58,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:28:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 00:28:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-30 00:29:06,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 00:29:06,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 74 transitions, 616 flow. Second operand has 17 states, 17 states have (on average 129.41176470588235) internal successors, (2200), 17 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:06,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:29:06,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 00:29:06,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:29:10,980 INFO L130 PetriNetUnfolder]: 9051/13735 cut-off events. [2023-08-30 00:29:10,980 INFO L131 PetriNetUnfolder]: For 52385/54745 co-relation queries the response was YES. [2023-08-30 00:29:11,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54094 conditions, 13735 events. 9051/13735 cut-off events. For 52385/54745 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 84036 event pairs, 5458 based on Foata normal form. 1626/15354 useless extension candidates. Maximal degree in co-relation 54045. Up to 9257 conditions per place. [2023-08-30 00:29:11,071 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 212 selfloop transitions, 19 changer transitions 0/236 dead transitions. [2023-08-30 00:29:11,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 236 transitions, 1910 flow [2023-08-30 00:29:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 00:29:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 00:29:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2207 transitions. [2023-08-30 00:29:11,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142267267267267 [2023-08-30 00:29:11,075 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2207 transitions. [2023-08-30 00:29:11,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2207 transitions. [2023-08-30 00:29:11,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:29:11,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2207 transitions. [2023-08-30 00:29:11,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 137.9375) internal successors, (2207), 16 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:11,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 333.0) internal successors, (5661), 17 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:11,082 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 333.0) internal successors, (5661), 17 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:11,082 INFO L175 Difference]: Start difference. First operand has 124 places, 74 transitions, 616 flow. Second operand 16 states and 2207 transitions. [2023-08-30 00:29:11,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 236 transitions, 1910 flow [2023-08-30 00:29:11,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 236 transitions, 1883 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-30 00:29:11,158 INFO L231 Difference]: Finished difference. Result has 138 places, 84 transitions, 720 flow [2023-08-30 00:29:11,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=720, PETRI_PLACES=138, PETRI_TRANSITIONS=84} [2023-08-30 00:29:11,158 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2023-08-30 00:29:11,158 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 84 transitions, 720 flow [2023-08-30 00:29:11,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 129.41176470588235) internal successors, (2200), 17 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:11,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:29:11,159 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:29:11,166 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 00:29:11,360 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 00:29:11,361 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:29:11,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:29:11,361 INFO L85 PathProgramCache]: Analyzing trace with hash 962369212, now seen corresponding path program 3 times [2023-08-30 00:29:11,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:29:11,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943922042] [2023-08-30 00:29:11,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:29:11,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:29:11,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:29:11,362 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 00:29:11,362 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 00:29:11,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:29:11,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:29:11,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:29:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:29:11,600 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:29:11,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:29:11,831 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 00:29:11,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:29:13,409 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 00:29:13,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:29:13,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943922042] [2023-08-30 00:29:13,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943922042] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:29:13,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:29:13,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:29:13,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142336947] [2023-08-30 00:29:13,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:29:13,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:29:13,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:29:13,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:29:13,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:29:24,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 00:29:24,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 84 transitions, 720 flow. Second operand has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:24,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:29:24,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 00:29:24,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:29:39,541 INFO L130 PetriNetUnfolder]: 21423/31609 cut-off events. [2023-08-30 00:29:39,541 INFO L131 PetriNetUnfolder]: For 152879/164288 co-relation queries the response was YES. [2023-08-30 00:29:39,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135807 conditions, 31609 events. 21423/31609 cut-off events. For 152879/164288 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 195245 event pairs, 15980 based on Foata normal form. 7942/39543 useless extension candidates. Maximal degree in co-relation 135752. Up to 5423 conditions per place. [2023-08-30 00:29:39,774 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 625 selfloop transitions, 25 changer transitions 0/658 dead transitions. [2023-08-30 00:29:39,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 658 transitions, 5511 flow [2023-08-30 00:29:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:29:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:29:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3723 transitions. [2023-08-30 00:29:39,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658408408408408 [2023-08-30 00:29:39,779 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3723 transitions. [2023-08-30 00:29:39,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3723 transitions. [2023-08-30 00:29:39,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:29:39,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3723 transitions. [2023-08-30 00:29:39,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 155.125) internal successors, (3723), 24 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:39,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:39,787 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:39,788 INFO L175 Difference]: Start difference. First operand has 138 places, 84 transitions, 720 flow. Second operand 24 states and 3723 transitions. [2023-08-30 00:29:39,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 658 transitions, 5511 flow [2023-08-30 00:29:40,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 658 transitions, 5495 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 00:29:40,258 INFO L231 Difference]: Finished difference. Result has 170 places, 98 transitions, 912 flow [2023-08-30 00:29:40,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=912, PETRI_PLACES=170, PETRI_TRANSITIONS=98} [2023-08-30 00:29:40,258 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 114 predicate places. [2023-08-30 00:29:40,258 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 98 transitions, 912 flow [2023-08-30 00:29:40,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 138.0) internal successors, (3312), 24 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:40,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:29:40,259 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-08-30 00:29:40,357 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 00:29:40,554 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 00:29:40,555 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:29:40,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:29:40,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1728324944, now seen corresponding path program 4 times [2023-08-30 00:29:40,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:29:40,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020136073] [2023-08-30 00:29:40,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:29:40,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:29:40,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:29:40,556 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 00:29:40,557 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 00:29:40,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:29:40,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:29:40,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:29:40,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:29:40,729 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:29:40,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:29:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:29:40,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:29:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:29:41,650 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:29:41,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020136073] [2023-08-30 00:29:41,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020136073] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:29:41,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:29:41,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-08-30 00:29:41,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094651289] [2023-08-30 00:29:41,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:29:41,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:29:41,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:29:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:29:41,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:29:47,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 333 [2023-08-30 00:29:47,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 98 transitions, 912 flow. Second operand has 16 states, 16 states have (on average 133.25) internal successors, (2132), 16 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:29:47,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:29:47,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 333 [2023-08-30 00:29:47,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:30:02,266 INFO L130 PetriNetUnfolder]: 52307/78755 cut-off events. [2023-08-30 00:30:02,266 INFO L131 PetriNetUnfolder]: For 298821/312896 co-relation queries the response was YES. [2023-08-30 00:30:03,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323753 conditions, 78755 events. 52307/78755 cut-off events. For 298821/312896 co-relation queries the response was YES. Maximal size of possible extension queue 1588. Compared 572268 event pairs, 3822 based on Foata normal form. 16211/94940 useless extension candidates. Maximal degree in co-relation 323684. Up to 14449 conditions per place. [2023-08-30 00:30:03,307 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 294 selfloop transitions, 38 changer transitions 0/335 dead transitions. [2023-08-30 00:30:03,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 335 transitions, 2883 flow [2023-08-30 00:30:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:30:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:30:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2035 transitions. [2023-08-30 00:30:03,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2023-08-30 00:30:03,310 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2035 transitions. [2023-08-30 00:30:03,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2035 transitions. [2023-08-30 00:30:03,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:30:03,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2035 transitions. [2023-08-30 00:30:03,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 145.35714285714286) internal successors, (2035), 14 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:03,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:03,315 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 333.0) internal successors, (4995), 15 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:03,315 INFO L175 Difference]: Start difference. First operand has 170 places, 98 transitions, 912 flow. Second operand 14 states and 2035 transitions. [2023-08-30 00:30:03,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 335 transitions, 2883 flow [2023-08-30 00:30:04,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 335 transitions, 2847 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-08-30 00:30:04,943 INFO L231 Difference]: Finished difference. Result has 179 places, 104 transitions, 1053 flow [2023-08-30 00:30:04,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1053, PETRI_PLACES=179, PETRI_TRANSITIONS=104} [2023-08-30 00:30:04,944 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 123 predicate places. [2023-08-30 00:30:04,944 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 104 transitions, 1053 flow [2023-08-30 00:30:04,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 133.25) internal successors, (2132), 16 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:04,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:30:04,944 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:30:04,952 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 00:30:05,145 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 00:30:05,145 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:30:05,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:30:05,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1212775463, now seen corresponding path program 3 times [2023-08-30 00:30:05,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:30:05,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637316511] [2023-08-30 00:30:05,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:30:05,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:30:05,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:30:05,147 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 00:30:05,147 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 00:30:05,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:30:05,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:30:05,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:30:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:30:05,404 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:30:05,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:30:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:30:05,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:30:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:30:05,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:30:05,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637316511] [2023-08-30 00:30:05,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637316511] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:30:05,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:30:05,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-30 00:30:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790551150] [2023-08-30 00:30:05,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:30:05,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:30:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:30:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:30:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:30:08,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 333 [2023-08-30 00:30:08,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 104 transitions, 1053 flow. Second operand has 16 states, 16 states have (on average 130.5) internal successors, (2088), 16 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:08,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:30:08,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 333 [2023-08-30 00:30:08,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:30:21,330 INFO L130 PetriNetUnfolder]: 54941/82855 cut-off events. [2023-08-30 00:30:21,330 INFO L131 PetriNetUnfolder]: For 330539/338994 co-relation queries the response was YES. [2023-08-30 00:30:22,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367301 conditions, 82855 events. 54941/82855 cut-off events. For 330539/338994 co-relation queries the response was YES. Maximal size of possible extension queue 1565. Compared 591623 event pairs, 44618 based on Foata normal form. 4767/87603 useless extension candidates. Maximal degree in co-relation 367225. Up to 81924 conditions per place. [2023-08-30 00:30:22,598 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 169 selfloop transitions, 13 changer transitions 0/187 dead transitions. [2023-08-30 00:30:22,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 187 transitions, 1745 flow [2023-08-30 00:30:22,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 00:30:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 00:30:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1789 transitions. [2023-08-30 00:30:22,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41325941325941323 [2023-08-30 00:30:22,601 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1789 transitions. [2023-08-30 00:30:22,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1789 transitions. [2023-08-30 00:30:22,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:30:22,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1789 transitions. [2023-08-30 00:30:22,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 137.6153846153846) internal successors, (1789), 13 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:22,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 333.0) internal successors, (4662), 14 states have internal predecessors, (4662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:22,605 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 333.0) internal successors, (4662), 14 states have internal predecessors, (4662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:22,605 INFO L175 Difference]: Start difference. First operand has 179 places, 104 transitions, 1053 flow. Second operand 13 states and 1789 transitions. [2023-08-30 00:30:22,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 187 transitions, 1745 flow [2023-08-30 00:30:25,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 187 transitions, 1645 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-08-30 00:30:25,798 INFO L231 Difference]: Finished difference. Result has 189 places, 107 transitions, 1035 flow [2023-08-30 00:30:25,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1035, PETRI_PLACES=189, PETRI_TRANSITIONS=107} [2023-08-30 00:30:25,798 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 133 predicate places. [2023-08-30 00:30:25,798 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 107 transitions, 1035 flow [2023-08-30 00:30:25,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 130.5) internal successors, (2088), 16 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:25,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:30:25,799 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:30:25,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 00:30:26,000 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 00:30:26,001 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:30:26,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:30:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1595132549, now seen corresponding path program 4 times [2023-08-30 00:30:26,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:30:26,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050666150] [2023-08-30 00:30:26,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:30:26,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:30:26,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:30:26,003 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 00:30:26,004 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 00:30:26,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:30:26,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:30:26,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:30:26,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:30:26,190 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:30:26,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:30:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:30:26,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:30:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:30:27,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:30:27,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050666150] [2023-08-30 00:30:27,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050666150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:30:27,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:30:27,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2023-08-30 00:30:27,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902747033] [2023-08-30 00:30:27,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:30:27,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:30:27,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:30:27,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:30:27,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:30:41,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 00:30:41,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 107 transitions, 1035 flow. Second operand has 22 states, 22 states have (on average 128.36363636363637) internal successors, (2824), 22 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:41,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:30:41,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 00:30:41,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:30:55,931 INFO L130 PetriNetUnfolder]: 54393/82005 cut-off events. [2023-08-30 00:30:55,931 INFO L131 PetriNetUnfolder]: For 329414/337839 co-relation queries the response was YES. [2023-08-30 00:30:57,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337814 conditions, 82005 events. 54393/82005 cut-off events. For 329414/337839 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 583510 event pairs, 43066 based on Foata normal form. 4769/86755 useless extension candidates. Maximal degree in co-relation 337734. Up to 79179 conditions per place. [2023-08-30 00:30:57,336 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 263 selfloop transitions, 28 changer transitions 0/296 dead transitions. [2023-08-30 00:30:57,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 296 transitions, 2470 flow [2023-08-30 00:30:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 00:30:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 00:30:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2996 transitions. [2023-08-30 00:30:57,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40895440895440893 [2023-08-30 00:30:57,339 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2996 transitions. [2023-08-30 00:30:57,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2996 transitions. [2023-08-30 00:30:57,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:30:57,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2996 transitions. [2023-08-30 00:30:57,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 136.1818181818182) internal successors, (2996), 22 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:57,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 333.0) internal successors, (7659), 23 states have internal predecessors, (7659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:57,345 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 333.0) internal successors, (7659), 23 states have internal predecessors, (7659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:30:57,345 INFO L175 Difference]: Start difference. First operand has 189 places, 107 transitions, 1035 flow. Second operand 22 states and 2996 transitions. [2023-08-30 00:30:57,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 296 transitions, 2470 flow [2023-08-30 00:31:00,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 296 transitions, 2450 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-30 00:31:00,277 INFO L231 Difference]: Finished difference. Result has 204 places, 113 transitions, 1170 flow [2023-08-30 00:31:00,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1170, PETRI_PLACES=204, PETRI_TRANSITIONS=113} [2023-08-30 00:31:00,278 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 148 predicate places. [2023-08-30 00:31:00,278 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 113 transitions, 1170 flow [2023-08-30 00:31:00,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 128.36363636363637) internal successors, (2824), 22 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:00,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:31:00,278 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:31:00,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 00:31:00,480 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 00:31:00,481 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:31:00,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:31:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash 397470915, now seen corresponding path program 5 times [2023-08-30 00:31:00,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:31:00,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252189179] [2023-08-30 00:31:00,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:31:00,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:31:00,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:31:00,482 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 00:31:00,483 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 00:31:00,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:31:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:31:00,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:31:00,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:31:00,692 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:31:00,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:31:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:31:00,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:31:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:31:02,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:31:02,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252189179] [2023-08-30 00:31:02,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252189179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:31:02,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:31:02,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:31:02,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77649403] [2023-08-30 00:31:02,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:31:02,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:31:02,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:31:02,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:31:02,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:31:14,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 333 [2023-08-30 00:31:14,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 113 transitions, 1170 flow. Second operand has 24 states, 24 states have (on average 129.25) internal successors, (3102), 24 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:14,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:31:14,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 333 [2023-08-30 00:31:14,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:31:49,141 INFO L130 PetriNetUnfolder]: 93087/136671 cut-off events. [2023-08-30 00:31:49,141 INFO L131 PetriNetUnfolder]: For 567916/581885 co-relation queries the response was YES. [2023-08-30 00:31:50,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536463 conditions, 136671 events. 93087/136671 cut-off events. For 567916/581885 co-relation queries the response was YES. Maximal size of possible extension queue 2386. Compared 1008071 event pairs, 7992 based on Foata normal form. 31717/168369 useless extension candidates. Maximal degree in co-relation 536382. Up to 30054 conditions per place. [2023-08-30 00:31:51,364 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 587 selfloop transitions, 49 changer transitions 0/641 dead transitions. [2023-08-30 00:31:51,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 641 transitions, 6114 flow [2023-08-30 00:31:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 00:31:51,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 00:31:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5087 transitions. [2023-08-30 00:31:51,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128723317912507 [2023-08-30 00:31:51,370 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5087 transitions. [2023-08-30 00:31:51,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5087 transitions. [2023-08-30 00:31:51,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:31:51,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5087 transitions. [2023-08-30 00:31:51,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 137.48648648648648) internal successors, (5087), 37 states have internal predecessors, (5087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:51,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 333.0) internal successors, (12654), 38 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:51,381 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 333.0) internal successors, (12654), 38 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:51,381 INFO L175 Difference]: Start difference. First operand has 204 places, 113 transitions, 1170 flow. Second operand 37 states and 5087 transitions. [2023-08-30 00:31:51,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 641 transitions, 6114 flow [2023-08-30 00:31:58,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 641 transitions, 6047 flow, removed 5 selfloop flow, removed 19 redundant places. [2023-08-30 00:31:58,510 INFO L231 Difference]: Finished difference. Result has 221 places, 129 transitions, 1311 flow [2023-08-30 00:31:58,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1311, PETRI_PLACES=221, PETRI_TRANSITIONS=129} [2023-08-30 00:31:58,511 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 165 predicate places. [2023-08-30 00:31:58,511 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 129 transitions, 1311 flow [2023-08-30 00:31:58,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 129.25) internal successors, (3102), 24 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:31:58,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:31:58,512 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 1, 1, 1, 1, 1] [2023-08-30 00:31:58,521 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 00:31:58,719 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 00:31:58,719 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:31:58,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:31:58,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2029101746, now seen corresponding path program 5 times [2023-08-30 00:31:58,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:31:58,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910427494] [2023-08-30 00:31:58,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:31:58,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:31:58,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:31:58,720 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 00:31:58,721 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 00:31:58,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 00:31:58,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:31:58,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 00:31:58,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:31:59,007 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:31:59,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:31:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:31:59,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:32:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:32:02,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:32:02,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910427494] [2023-08-30 00:32:02,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910427494] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:32:02,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:32:02,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 34 [2023-08-30 00:32:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521030421] [2023-08-30 00:32:02,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:32:02,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 00:32:02,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:32:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 00:32:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 00:32:27,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 00:32:27,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 129 transitions, 1311 flow. Second operand has 35 states, 35 states have (on average 128.11428571428573) internal successors, (4484), 35 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:32:27,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:32:27,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 00:32:27,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:33:08,229 INFO L130 PetriNetUnfolder]: 90705/132996 cut-off events. [2023-08-30 00:33:08,230 INFO L131 PetriNetUnfolder]: For 537622/548449 co-relation queries the response was YES. [2023-08-30 00:33:10,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575250 conditions, 132996 events. 90705/132996 cut-off events. For 537622/548449 co-relation queries the response was YES. Maximal size of possible extension queue 2329. Compared 954001 event pairs, 57170 based on Foata normal form. 8373/141361 useless extension candidates. Maximal degree in co-relation 575173. Up to 103551 conditions per place. [2023-08-30 00:33:10,578 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 1071 selfloop transitions, 90 changer transitions 0/1165 dead transitions. [2023-08-30 00:33:10,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1165 transitions, 10165 flow [2023-08-30 00:33:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 00:33:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 00:33:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 7367 transitions. [2023-08-30 00:33:10,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174174174174174 [2023-08-30 00:33:10,586 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 7367 transitions. [2023-08-30 00:33:10,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 7367 transitions. [2023-08-30 00:33:10,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:33:10,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 7367 transitions. [2023-08-30 00:33:10,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 139.0) internal successors, (7367), 53 states have internal predecessors, (7367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:10,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 333.0) internal successors, (17982), 54 states have internal predecessors, (17982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:10,601 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 333.0) internal successors, (17982), 54 states have internal predecessors, (17982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:10,601 INFO L175 Difference]: Start difference. First operand has 221 places, 129 transitions, 1311 flow. Second operand 53 states and 7367 transitions. [2023-08-30 00:33:10,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1165 transitions, 10165 flow [2023-08-30 00:33:14,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1165 transitions, 7325 flow, removed 858 selfloop flow, removed 28 redundant places. [2023-08-30 00:33:14,309 INFO L231 Difference]: Finished difference. Result has 257 places, 183 transitions, 1773 flow [2023-08-30 00:33:14,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=1773, PETRI_PLACES=257, PETRI_TRANSITIONS=183} [2023-08-30 00:33:14,310 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 201 predicate places. [2023-08-30 00:33:14,310 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 183 transitions, 1773 flow [2023-08-30 00:33:14,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 128.11428571428573) internal successors, (4484), 35 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:14,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:33:14,310 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:33:14,320 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 00:33:14,513 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 00:33:14,513 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:33:14,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:33:14,513 INFO L85 PathProgramCache]: Analyzing trace with hash 557456643, now seen corresponding path program 6 times [2023-08-30 00:33:14,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:33:14,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686935125] [2023-08-30 00:33:14,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:33:14,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:33:14,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:33:14,515 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 00:33:14,515 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 00:33:14,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-30 00:33:14,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:33:14,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 00:33:14,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:33:14,952 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:33:14,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:33:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:33:15,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:33:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:33:17,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:33:17,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686935125] [2023-08-30 00:33:17,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686935125] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:33:17,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:33:17,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2023-08-30 00:33:17,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034767359] [2023-08-30 00:33:17,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:33:17,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 00:33:17,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:33:17,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 00:33:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 00:33:35,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-08-30 00:33:35,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 183 transitions, 1773 flow. Second operand has 34 states, 34 states have (on average 131.2058823529412) internal successors, (4461), 34 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:33:35,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:33:35,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-08-30 00:33:35,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:15,709 INFO L130 PetriNetUnfolder]: 89523/135113 cut-off events. [2023-08-30 00:34:15,709 INFO L131 PetriNetUnfolder]: For 553520/568054 co-relation queries the response was YES. [2023-08-30 00:34:17,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522049 conditions, 135113 events. 89523/135113 cut-off events. For 553520/568054 co-relation queries the response was YES. Maximal size of possible extension queue 2593. Compared 1029381 event pairs, 46330 based on Foata normal form. 8309/143413 useless extension candidates. Maximal degree in co-relation 521970. Up to 84475 conditions per place. [2023-08-30 00:34:17,978 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 819 selfloop transitions, 68 changer transitions 0/894 dead transitions. [2023-08-30 00:34:17,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 894 transitions, 9534 flow [2023-08-30 00:34:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 00:34:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 00:34:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 5861 transitions. [2023-08-30 00:34:17,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190619190619191 [2023-08-30 00:34:17,985 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 5861 transitions. [2023-08-30 00:34:17,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 5861 transitions. [2023-08-30 00:34:17,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:17,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 5861 transitions. [2023-08-30 00:34:17,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 139.54761904761904) internal successors, (5861), 42 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:17,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 333.0) internal successors, (14319), 43 states have internal predecessors, (14319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:17,999 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 333.0) internal successors, (14319), 43 states have internal predecessors, (14319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:18,000 INFO L175 Difference]: Start difference. First operand has 257 places, 183 transitions, 1773 flow. Second operand 42 states and 5861 transitions. [2023-08-30 00:34:18,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 894 transitions, 9534 flow [2023-08-30 00:34:21,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 894 transitions, 8260 flow, removed 430 selfloop flow, removed 35 redundant places. [2023-08-30 00:34:21,235 INFO L231 Difference]: Finished difference. Result has 270 places, 189 transitions, 1683 flow [2023-08-30 00:34:21,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1683, PETRI_PLACES=270, PETRI_TRANSITIONS=189} [2023-08-30 00:34:21,236 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 214 predicate places. [2023-08-30 00:34:21,236 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 189 transitions, 1683 flow [2023-08-30 00:34:21,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 131.2058823529412) internal successors, (4461), 34 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:21,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:21,237 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] [2023-08-30 00:34:21,249 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 00:34:21,441 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 00:34:21,442 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:34:21,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:21,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1794722650, now seen corresponding path program 1 times [2023-08-30 00:34:21,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:21,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378580467] [2023-08-30 00:34:21,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:34:21,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:21,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:21,443 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 00:34:21,443 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 00:34:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:34:21,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 00:34:21,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:21,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:34:21,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 19 [2023-08-30 00:34:21,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:34:21,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 160 treesize of output 55 [2023-08-30 00:34:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:34:21,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:23,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 00:34:23,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 145 treesize of output 40 [2023-08-30 00:34:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:34:25,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:25,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378580467] [2023-08-30 00:34:25,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378580467] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 00:34:25,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 00:34:25,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-30 00:34:25,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743139209] [2023-08-30 00:34:25,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:34:25,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:34:25,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:25,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:34:25,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2023-08-30 00:34:25,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 333 [2023-08-30 00:34:25,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 189 transitions, 1683 flow. Second operand has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 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 00:34:25,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:34:25,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 333 [2023-08-30 00:34:25,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:34:45,255 INFO L130 PetriNetUnfolder]: 84291/126624 cut-off events. [2023-08-30 00:34:45,255 INFO L131 PetriNetUnfolder]: For 535210/558614 co-relation queries the response was YES. [2023-08-30 00:34:46,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496450 conditions, 126624 events. 84291/126624 cut-off events. For 535210/558614 co-relation queries the response was YES. Maximal size of possible extension queue 2555. Compared 992487 event pairs, 37421 based on Foata normal form. 14304/140830 useless extension candidates. Maximal degree in co-relation 496377. Up to 72380 conditions per place. [2023-08-30 00:34:47,398 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 152 selfloop transitions, 2 changer transitions 161/319 dead transitions. [2023-08-30 00:34:47,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 319 transitions, 3386 flow [2023-08-30 00:34:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:34:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:34:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 602 transitions. [2023-08-30 00:34:47,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519519519519519 [2023-08-30 00:34:47,400 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 602 transitions. [2023-08-30 00:34:47,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 602 transitions. [2023-08-30 00:34:47,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:34:47,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 602 transitions. [2023-08-30 00:34:47,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:47,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:47,402 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:34:47,402 INFO L175 Difference]: Start difference. First operand has 270 places, 189 transitions, 1683 flow. Second operand 4 states and 602 transitions. [2023-08-30 00:34:47,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 319 transitions, 3386 flow [2023-08-30 00:34:50,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 319 transitions, 3231 flow, removed 28 selfloop flow, removed 23 redundant places. [2023-08-30 00:34:50,188 INFO L231 Difference]: Finished difference. Result has 249 places, 100 transitions, 862 flow [2023-08-30 00:34:50,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=862, PETRI_PLACES=249, PETRI_TRANSITIONS=100} [2023-08-30 00:34:50,188 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 193 predicate places. [2023-08-30 00:34:50,188 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 100 transitions, 862 flow [2023-08-30 00:34:50,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 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 00:34:50,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:34:50,189 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 6, 1, 1, 1, 1, 1] [2023-08-30 00:34:50,196 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 00:34:50,389 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 00:34:50,389 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:34:50,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:34:50,389 INFO L85 PathProgramCache]: Analyzing trace with hash 141355857, now seen corresponding path program 6 times [2023-08-30 00:34:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:34:50,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799943248] [2023-08-30 00:34:50,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:34:50,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:34:50,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:34:50,391 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 00:34:50,393 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 00:34:50,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-30 00:34:50,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:34:50,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 00:34:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:34:50,741 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:34:50,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:34:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:51,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:34:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:34:55,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:34:55,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799943248] [2023-08-30 00:34:55,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799943248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:34:55,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:34:55,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2023-08-30 00:34:55,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664826939] [2023-08-30 00:34:55,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:34:55,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-30 00:34:55,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:34:55,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-30 00:34:55,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2023-08-30 00:35:34,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 00:35:34,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 100 transitions, 862 flow. Second operand has 41 states, 41 states have (on average 128.0731707317073) internal successors, (5251), 41 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:35:34,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:35:34,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 00:35:34,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:36:10,157 INFO L130 PetriNetUnfolder]: 76690/112391 cut-off events. [2023-08-30 00:36:10,157 INFO L131 PetriNetUnfolder]: For 459289/469616 co-relation queries the response was YES. [2023-08-30 00:36:11,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460205 conditions, 112391 events. 76690/112391 cut-off events. For 459289/469616 co-relation queries the response was YES. Maximal size of possible extension queue 2226. Compared 805615 event pairs, 42198 based on Foata normal form. 6993/119383 useless extension candidates. Maximal degree in co-relation 460146. Up to 75356 conditions per place. [2023-08-30 00:36:12,176 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 565 selfloop transitions, 44 changer transitions 214/825 dead transitions. [2023-08-30 00:36:12,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 825 transitions, 7060 flow [2023-08-30 00:36:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 00:36:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 00:36:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4886 transitions. [2023-08-30 00:36:12,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075742409075742 [2023-08-30 00:36:12,183 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4886 transitions. [2023-08-30 00:36:12,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4886 transitions. [2023-08-30 00:36:12,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:36:12,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4886 transitions. [2023-08-30 00:36:12,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 135.72222222222223) internal successors, (4886), 36 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:12,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 333.0) internal successors, (12321), 37 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:12,196 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 333.0) internal successors, (12321), 37 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:12,196 INFO L175 Difference]: Start difference. First operand has 249 places, 100 transitions, 862 flow. Second operand 36 states and 4886 transitions. [2023-08-30 00:36:12,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 825 transitions, 7060 flow [2023-08-30 00:36:17,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 825 transitions, 6066 flow, removed 484 selfloop flow, removed 7 redundant places. [2023-08-30 00:36:17,549 INFO L231 Difference]: Finished difference. Result has 211 places, 115 transitions, 1160 flow [2023-08-30 00:36:17,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1160, PETRI_PLACES=211, PETRI_TRANSITIONS=115} [2023-08-30 00:36:17,549 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 155 predicate places. [2023-08-30 00:36:17,549 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 115 transitions, 1160 flow [2023-08-30 00:36:17,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 128.0731707317073) internal successors, (5251), 41 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:36:17,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:36:17,550 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1] [2023-08-30 00:36:17,561 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 00:36:17,759 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 00:36:17,759 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:36:17,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:36:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1394561328, now seen corresponding path program 7 times [2023-08-30 00:36:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:36:17,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844084213] [2023-08-30 00:36:17,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:36:17,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:36:17,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:36:17,761 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 00:36:17,762 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 (33)] Waiting until timeout for monitored process [2023-08-30 00:36:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:36:17,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 00:36:17,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:36:18,048 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:36:18,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:36:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:36:18,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:36:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:36:24,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:36:24,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844084213] [2023-08-30 00:36:24,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844084213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:36:24,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:36:24,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2023-08-30 00:36:24,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602199088] [2023-08-30 00:36:24,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:36:24,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 00:36:24,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:36:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 00:36:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2023-08-30 00:37:05,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 333 [2023-08-30 00:37:05,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 115 transitions, 1160 flow. Second operand has 43 states, 43 states have (on average 128.06976744186048) internal successors, (5507), 43 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:05,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:37:05,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 333 [2023-08-30 00:37:05,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:37:46,354 INFO L130 PetriNetUnfolder]: 75543/110698 cut-off events. [2023-08-30 00:37:46,354 INFO L131 PetriNetUnfolder]: For 374569/384795 co-relation queries the response was YES. [2023-08-30 00:37:47,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431536 conditions, 110698 events. 75543/110698 cut-off events. For 374569/384795 co-relation queries the response was YES. Maximal size of possible extension queue 2251. Compared 793919 event pairs, 49008 based on Foata normal form. 6816/117489 useless extension candidates. Maximal degree in co-relation 431467. Up to 87947 conditions per place. [2023-08-30 00:37:48,140 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 333 selfloop transitions, 25 changer transitions 561/921 dead transitions. [2023-08-30 00:37:48,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 921 transitions, 7648 flow [2023-08-30 00:37:48,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 00:37:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 00:37:48,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 6264 transitions. [2023-08-30 00:37:48,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408930669800235 [2023-08-30 00:37:48,149 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 6264 transitions. [2023-08-30 00:37:48,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 6264 transitions. [2023-08-30 00:37:48,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:37:48,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 6264 transitions. [2023-08-30 00:37:48,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 136.17391304347825) internal successors, (6264), 46 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:48,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 333.0) internal successors, (15651), 47 states have internal predecessors, (15651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:48,161 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 333.0) internal successors, (15651), 47 states have internal predecessors, (15651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:37:48,161 INFO L175 Difference]: Start difference. First operand has 211 places, 115 transitions, 1160 flow. Second operand 46 states and 6264 transitions. [2023-08-30 00:37:48,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 921 transitions, 7648 flow [2023-08-30 00:38:14,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 921 transitions, 6882 flow, removed 350 selfloop flow, removed 16 redundant places. [2023-08-30 00:38:14,829 INFO L231 Difference]: Finished difference. Result has 253 places, 113 transitions, 1152 flow [2023-08-30 00:38:14,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1152, PETRI_PLACES=253, PETRI_TRANSITIONS=113} [2023-08-30 00:38:14,829 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 197 predicate places. [2023-08-30 00:38:14,830 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 113 transitions, 1152 flow [2023-08-30 00:38:14,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 128.06976744186048) internal successors, (5507), 43 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:38:14,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:38:14,830 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-08-30 00:38:14,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2023-08-30 00:38:15,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:38:15,033 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 00:38:15,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:38:15,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1433485372, now seen corresponding path program 4 times [2023-08-30 00:38:15,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:38:15,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817438328] [2023-08-30 00:38:15,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:38:15,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:38:15,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:38:15,035 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:38:15,037 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 (34)] Waiting until timeout for monitored process [2023-08-30 00:38:15,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:38:15,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:38:15,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 00:38:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:38:15,269 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:38:15,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:38:15,994 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 00:38:15,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:38:23,331 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 00:38:23,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:38:23,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817438328] [2023-08-30 00:38:23,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817438328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:38:23,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:38:23,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-08-30 00:38:23,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757121860] [2023-08-30 00:38:23,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:38:23,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 00:38:23,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:38:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 00:38:23,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-08-30 00:39:19,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-08-30 00:39:19,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 113 transitions, 1152 flow. Second operand has 48 states, 48 states have (on average 138.0) internal successors, (6624), 48 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:19,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:19,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-08-30 00:39:19,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:33,474 WARN L222 SmtUtils]: Spent 10.62s 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 00:39:40,604 WARN L222 SmtUtils]: Spent 5.87s 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 00:39:47,551 WARN L222 SmtUtils]: Spent 5.71s 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 00:39:56,297 WARN L222 SmtUtils]: Spent 7.35s 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)