./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-three-array-min.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-three-array-min.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 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 --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 01:07:29,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:07:29,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:07:29,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:07:29,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:07:29,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:07:29,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:07:29,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:07:29,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:07:29,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:07:29,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:07:29,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:07:29,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:07:29,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:07:29,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:07:29,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:07:29,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:07:29,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:07:29,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:07:29,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:07:29,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:07:29,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:07:29,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:07:29,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:07:29,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:07:29,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:07:29,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:07:29,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:07:29,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:07:29,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:07:29,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:07:29,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:07:29,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:07:29,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:07:29,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:07:29,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:07:29,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:07:29,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:07:29,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:07:29,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:07:29,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:07:29,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 01:07:29,655 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:07:29,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:07:29,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:07:29,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:07:29,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:07:29,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:07:29,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:07:29,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:07:29,660 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:07:29,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:07:29,661 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:07:29,662 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:07:29,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:07:29,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:07:29,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:07:29,662 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:07:29,663 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:07:29,663 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:07:29,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:07:29,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:07:29,664 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:07:29,664 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:07:29,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:07:29,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:07:29,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:07:29,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:07:29,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:07:29,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:07:29,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 01:07:29,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 01:07:29,666 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:07:29,666 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:07:29,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:07:29,667 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:07:29,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:07:29,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:07:30,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:07:30,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:07:30,011 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:07:30,011 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:07:30,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-08-30 01:07:31,308 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:07:31,515 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:07:31,515 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-08-30 01:07:31,527 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f3bf2fe4/c21f0e4623434383b55501391a2102ae/FLAG7a4761853 [2023-08-30 01:07:31,553 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f3bf2fe4/c21f0e4623434383b55501391a2102ae [2023-08-30 01:07:31,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:07:31,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:07:31,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:07:31,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:07:31,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:07:31,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:07:31" (1/1) ... [2023-08-30 01:07:31,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c200909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:31, skipping insertion in model container [2023-08-30 01:07:31,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:07:31" (1/1) ... [2023-08-30 01:07:31,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:07:31,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:07:31,791 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-three-array-min.wvr.c[2815,2828] [2023-08-30 01:07:31,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:07:31,820 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 01:07:31,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15080575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:31, skipping insertion in model container [2023-08-30 01:07:31,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:07:31,823 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 01:07:31,825 INFO L158 Benchmark]: Toolchain (without parser) took 266.72ms. Allocated memory is still 90.2MB. Free memory was 67.8MB in the beginning and 57.7MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:07:31,825 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 60.8MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 01:07:31,826 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.92ms. Allocated memory is still 90.2MB. Free memory was 67.5MB in the beginning and 57.8MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:07:31,827 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 60.8MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.92ms. Allocated memory is still 90.2MB. Free memory was 67.5MB in the beginning and 57.8MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 123]: 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-three-array-min.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 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 --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 01:07:33,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:07:33,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:07:33,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:07:33,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:07:33,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:07:33,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:07:33,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:07:33,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:07:33,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:07:33,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:07:33,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:07:33,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:07:33,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:07:33,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:07:33,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:07:33,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:07:33,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:07:33,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:07:33,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:07:33,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:07:33,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:07:33,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:07:33,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:07:33,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:07:33,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:07:33,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:07:33,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:07:33,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:07:33,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:07:33,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:07:33,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:07:33,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:07:33,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:07:33,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:07:33,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:07:33,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:07:33,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:07:33,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:07:33,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:07:33,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:07:33,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 01:07:33,688 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:07:33,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:07:33,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:07:33,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:07:33,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:07:33,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:07:33,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:07:33,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:07:33,692 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:07:33,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:07:33,693 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:07:33,693 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:07:33,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:07:33,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:07:33,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:07:33,694 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:07:33,694 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:07:33,695 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:07:33,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:07:33,695 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:07:33,695 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 01:07:33,695 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 01:07:33,696 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:07:33,696 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:07:33,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:07:33,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:07:33,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:07:33,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:07:33,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:07:33,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:07:33,697 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 01:07:33,697 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 01:07:33,698 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:07:33,698 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:07:33,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:07:33,698 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 01:07:33,699 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:07:33,699 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:07:33,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:07:34,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:07:34,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:07:34,014 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:07:34,014 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:07:34,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-08-30 01:07:35,159 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:07:35,382 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:07:35,383 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-08-30 01:07:35,389 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20a45e5ff/3099a724cede4f058cad034aeaf8e608/FLAG74ad51e32 [2023-08-30 01:07:35,400 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20a45e5ff/3099a724cede4f058cad034aeaf8e608 [2023-08-30 01:07:35,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:07:35,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:07:35,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:07:35,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:07:35,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:07:35,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43560c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35, skipping insertion in model container [2023-08-30 01:07:35,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:07:35,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:07:35,631 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-three-array-min.wvr.c[2815,2828] [2023-08-30 01:07:35,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:07:35,671 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 01:07:35,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:07:35,713 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-three-array-min.wvr.c[2815,2828] [2023-08-30 01:07:35,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:07:35,725 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 01:07:35,762 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-three-array-min.wvr.c[2815,2828] [2023-08-30 01:07:35,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:07:35,780 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 01:07:35,781 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 01:07:35,788 INFO L208 MainTranslator]: Completed translation [2023-08-30 01:07:35,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35 WrapperNode [2023-08-30 01:07:35,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:07:35,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 01:07:35,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 01:07:35,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 01:07:35,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,864 INFO L138 Inliner]: procedures = 28, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 229 [2023-08-30 01:07:35,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 01:07:35,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 01:07:35,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 01:07:35,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 01:07:35,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,920 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 01:07:35,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 01:07:35,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 01:07:35,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 01:07:35,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (1/1) ... [2023-08-30 01:07:35,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:07:35,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:07:35,965 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 01:07:35,973 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 01:07:35,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 01:07:35,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 01:07:35,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 01:07:35,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 01:07:35,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 01:07:35,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 01:07:35,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 01:07:35,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 01:07:35,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 01:07:35,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 01:07:35,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 01:07:35,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 01:07:35,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 01:07:35,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 01:07:35,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 01:07:35,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 01:07:36,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 01:07:36,001 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 01:07:36,100 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 01:07:36,102 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 01:07:36,939 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 01:07:37,139 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 01:07:37,139 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 01:07:37,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:07:37 BoogieIcfgContainer [2023-08-30 01:07:37,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 01:07:37,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 01:07:37,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 01:07:37,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 01:07:37,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:07:35" (1/3) ... [2023-08-30 01:07:37,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3365c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:07:37, skipping insertion in model container [2023-08-30 01:07:37,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:07:35" (2/3) ... [2023-08-30 01:07:37,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3365c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:07:37, skipping insertion in model container [2023-08-30 01:07:37,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:07:37" (3/3) ... [2023-08-30 01:07:37,150 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2023-08-30 01:07:37,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 01:07:37,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-08-30 01:07:37,167 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 01:07:37,296 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 01:07:37,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 326 transitions, 676 flow [2023-08-30 01:07:37,477 INFO L130 PetriNetUnfolder]: 27/323 cut-off events. [2023-08-30 01:07:37,478 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 01:07:37,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 323 events. 27/323 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 428 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-08-30 01:07:37,485 INFO L82 GeneralOperation]: Start removeDead. Operand has 309 places, 326 transitions, 676 flow [2023-08-30 01:07:37,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 319 transitions, 656 flow [2023-08-30 01:07:37,498 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 01:07:37,511 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 302 places, 319 transitions, 656 flow [2023-08-30 01:07:37,515 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 302 places, 319 transitions, 656 flow [2023-08-30 01:07:37,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 319 transitions, 656 flow [2023-08-30 01:07:37,587 INFO L130 PetriNetUnfolder]: 27/319 cut-off events. [2023-08-30 01:07:37,587 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 01:07:37,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 319 events. 27/319 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 434 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-08-30 01:07:37,594 INFO L119 LiptonReduction]: Number of co-enabled transitions 5194 [2023-08-30 01:08:19,007 INFO L134 LiptonReduction]: Checked pairs total: 9038 [2023-08-30 01:08:19,007 INFO L136 LiptonReduction]: Total number of compositions: 375 [2023-08-30 01:08:19,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 01:08:19,027 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;@34481785, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 01:08:19,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-08-30 01:08:19,030 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 01:08:19,030 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:08:19,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:08:19,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:08:19,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 01:08:19,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:08:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 42350, now seen corresponding path program 1 times [2023-08-30 01:08:19,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:08:19,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169875870] [2023-08-30 01:08:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:08:19,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:08:19,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:08:19,053 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 01:08:19,058 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 01:08:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:08:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:08:19,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:08:19,460 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:08:19,461 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 01:08:19,527 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 01:08:19,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:08:19,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:08:19,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169875870] [2023-08-30 01:08:19,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169875870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:08:19,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:08:19,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:08:19,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501534220] [2023-08-30 01:08:19,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:08:19,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:08:19,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:08:19,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:08:19,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:08:19,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 701 [2023-08-30 01:08:19,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:19,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:08:19,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 701 [2023-08-30 01:08:19,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:08:22,066 INFO L130 PetriNetUnfolder]: 9900/12210 cut-off events. [2023-08-30 01:08:22,066 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2023-08-30 01:08:22,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24567 conditions, 12210 events. 9900/12210 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 53948 event pairs, 4614 based on Foata normal form. 0/3120 useless extension candidates. Maximal degree in co-relation 22321. Up to 12128 conditions per place. [2023-08-30 01:08:22,158 INFO L137 encePairwiseOnDemand]: 686/701 looper letters, 64 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-08-30 01:08:22,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 72 transitions, 296 flow [2023-08-30 01:08:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:08:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:08:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-08-30 01:08:22,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414170233000476 [2023-08-30 01:08:22,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-08-30 01:08:22,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-08-30 01:08:22,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:08:22,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-08-30 01:08:22,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:22,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:22,192 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:22,193 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 178 flow. Second operand 3 states and 913 transitions. [2023-08-30 01:08:22,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 72 transitions, 296 flow [2023-08-30 01:08:22,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 284 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 01:08:22,202 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 163 flow [2023-08-30 01:08:22,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2023-08-30 01:08:22,207 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -14 predicate places. [2023-08-30 01:08:22,207 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 163 flow [2023-08-30 01:08:22,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:22,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:08:22,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:08:22,222 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 01:08:22,422 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 01:08:22,423 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 01:08:22,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:08:22,423 INFO L85 PathProgramCache]: Analyzing trace with hash 42349, now seen corresponding path program 1 times [2023-08-30 01:08:22,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:08:22,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121731526] [2023-08-30 01:08:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:08:22,425 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 01:08:22,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:08:22,426 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 01:08:22,430 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 01:08:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:08:22,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:08:22,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:08:22,559 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 01:08:22,559 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 01:08:22,574 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 01:08:22,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:08:22,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:08:22,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121731526] [2023-08-30 01:08:22,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121731526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:08:22,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:08:22,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:08:22,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641258572] [2023-08-30 01:08:22,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:08:22,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:08:22,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:08:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:08:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:08:22,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 701 [2023-08-30 01:08:22,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:22,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:08:22,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 701 [2023-08-30 01:08:22,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:08:24,293 INFO L130 PetriNetUnfolder]: 9900/12206 cut-off events. [2023-08-30 01:08:24,294 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 01:08:24,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24424 conditions, 12206 events. 9900/12206 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 53927 event pairs, 4614 based on Foata normal form. 2/3122 useless extension candidates. Maximal degree in co-relation 24400. Up to 12125 conditions per place. [2023-08-30 01:08:24,365 INFO L137 encePairwiseOnDemand]: 697/701 looper letters, 62 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-08-30 01:08:24,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 68 transitions, 283 flow [2023-08-30 01:08:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:08:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:08:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 898 transitions. [2023-08-30 01:08:24,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270090347123157 [2023-08-30 01:08:24,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 898 transitions. [2023-08-30 01:08:24,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 898 transitions. [2023-08-30 01:08:24,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:08:24,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 898 transitions. [2023-08-30 01:08:24,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:24,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:24,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:24,378 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 163 flow. Second operand 3 states and 898 transitions. [2023-08-30 01:08:24,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 68 transitions, 283 flow [2023-08-30 01:08:24,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 278 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 01:08:24,382 INFO L231 Difference]: Finished difference. Result has 65 places, 68 transitions, 154 flow [2023-08-30 01:08:24,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=65, PETRI_TRANSITIONS=68} [2023-08-30 01:08:24,383 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -16 predicate places. [2023-08-30 01:08:24,383 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 68 transitions, 154 flow [2023-08-30 01:08:24,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:24,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:08:24,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:08:24,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 01:08:24,595 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 01:08:24,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 01:08:24,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:08:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1317318, now seen corresponding path program 1 times [2023-08-30 01:08:24,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:08:24,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342715258] [2023-08-30 01:08:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:08:24,597 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 01:08:24,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:08:24,601 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 01:08:24,603 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 01:08:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:08:24,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:08:24,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:08:24,773 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:08:24,774 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 01:08:24,834 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 01:08:24,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:08:25,014 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 01:08:25,015 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:08:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342715258] [2023-08-30 01:08:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342715258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:08:25,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:08:25,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 01:08:25,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064769748] [2023-08-30 01:08:25,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:08:25,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:08:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:08:25,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:08:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:08:25,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 701 [2023-08-30 01:08:26,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:26,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:08:26,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 701 [2023-08-30 01:08:26,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:08:28,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:08:31,617 INFO L130 PetriNetUnfolder]: 29713/36628 cut-off events. [2023-08-30 01:08:31,617 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 01:08:31,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73272 conditions, 36628 events. 29713/36628 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 2618. Compared 181270 event pairs, 13842 based on Foata normal form. 0/9798 useless extension candidates. Maximal degree in co-relation 73264. Up to 12131 conditions per place. [2023-08-30 01:08:31,796 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 164 selfloop transitions, 35 changer transitions 0/204 dead transitions. [2023-08-30 01:08:31,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 204 transitions, 848 flow [2023-08-30 01:08:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:08:31,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:08:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1788 transitions. [2023-08-30 01:08:31,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42510699001426533 [2023-08-30 01:08:31,803 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1788 transitions. [2023-08-30 01:08:31,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1788 transitions. [2023-08-30 01:08:31,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:08:31,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1788 transitions. [2023-08-30 01:08:31,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:31,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 701.0) internal successors, (4907), 7 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:31,817 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 701.0) internal successors, (4907), 7 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:31,817 INFO L175 Difference]: Start difference. First operand has 65 places, 68 transitions, 154 flow. Second operand 6 states and 1788 transitions. [2023-08-30 01:08:31,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 204 transitions, 848 flow [2023-08-30 01:08:31,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 204 transitions, 847 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:08:31,821 INFO L231 Difference]: Finished difference. Result has 74 places, 100 transitions, 427 flow [2023-08-30 01:08:31,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=74, PETRI_TRANSITIONS=100} [2023-08-30 01:08:31,823 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -7 predicate places. [2023-08-30 01:08:31,823 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 100 transitions, 427 flow [2023-08-30 01:08:31,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:31,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:08:31,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 01:08:31,837 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 01:08:32,037 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 01:08:32,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 01:08:32,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:08:32,038 INFO L85 PathProgramCache]: Analyzing trace with hash 40874337, now seen corresponding path program 1 times [2023-08-30 01:08:32,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:08:32,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161217782] [2023-08-30 01:08:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:08:32,039 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 01:08:32,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:08:32,041 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 01:08:32,043 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 01:08:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:08:32,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:08:32,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:08:32,166 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 01:08:32,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:08:32,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:08:32,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161217782] [2023-08-30 01:08:32,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161217782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:08:32,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:08:32,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:08:32,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517460342] [2023-08-30 01:08:32,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:08:32,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:08:32,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:08:32,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:08:32,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:08:32,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 701 [2023-08-30 01:08:32,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 100 transitions, 427 flow. Second operand has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:32,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:08:32,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 701 [2023-08-30 01:08:32,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:08:35,417 INFO L130 PetriNetUnfolder]: 29712/36627 cut-off events. [2023-08-30 01:08:35,417 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-30 01:08:35,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73400 conditions, 36627 events. 29712/36627 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 3053. Compared 183085 event pairs, 13842 based on Foata normal form. 1/9379 useless extension candidates. Maximal degree in co-relation 73386. Up to 36384 conditions per place. [2023-08-30 01:08:35,626 INFO L137 encePairwiseOnDemand]: 698/701 looper letters, 92 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-30 01:08:35,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 611 flow [2023-08-30 01:08:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:08:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:08:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-30 01:08:35,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43081312410841655 [2023-08-30 01:08:35,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-30 01:08:35,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-30 01:08:35,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:08:35,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-30 01:08:35,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:35,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:35,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:35,638 INFO L175 Difference]: Start difference. First operand has 74 places, 100 transitions, 427 flow. Second operand 3 states and 906 transitions. [2023-08-30 01:08:35,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 611 flow [2023-08-30 01:08:35,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 599 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 01:08:35,646 INFO L231 Difference]: Finished difference. Result has 76 places, 99 transitions, 415 flow [2023-08-30 01:08:35,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=76, PETRI_TRANSITIONS=99} [2023-08-30 01:08:35,647 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2023-08-30 01:08:35,648 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 99 transitions, 415 flow [2023-08-30 01:08:35,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:35,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:08:35,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:08:35,659 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 01:08:35,858 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 01:08:35,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 01:08:35,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:08:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1266118544, now seen corresponding path program 1 times [2023-08-30 01:08:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:08:35,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793604593] [2023-08-30 01:08:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:08:35,859 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 01:08:35,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:08:35,861 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 01:08:35,864 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 01:08:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:08:35,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 01:08:35,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:08:36,023 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 01:08:36,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:08:36,092 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 01:08:36,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:08:36,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793604593] [2023-08-30 01:08:36,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793604593] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:08:36,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:08:36,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 01:08:36,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43258194] [2023-08-30 01:08:36,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:08:36,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:08:36,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:08:36,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:08:36,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:08:36,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 701 [2023-08-30 01:08:36,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 99 transitions, 415 flow. Second operand has 8 states, 8 states have (on average 274.125) internal successors, (2193), 8 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:36,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:08:36,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 701 [2023-08-30 01:08:36,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:08:42,527 INFO L130 PetriNetUnfolder]: 49514/61037 cut-off events. [2023-08-30 01:08:42,527 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-30 01:08:42,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122285 conditions, 61037 events. 49514/61037 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 4670. Compared 320135 event pairs, 23070 based on Foata normal form. 4/16500 useless extension candidates. Maximal degree in co-relation 122269. Up to 36377 conditions per place. [2023-08-30 01:08:42,858 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 187 selfloop transitions, 31 changer transitions 0/223 dead transitions. [2023-08-30 01:08:42,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 223 transitions, 1247 flow [2023-08-30 01:08:42,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 01:08:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 01:08:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2392 transitions. [2023-08-30 01:08:42,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42653352353780316 [2023-08-30 01:08:42,867 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2392 transitions. [2023-08-30 01:08:42,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2392 transitions. [2023-08-30 01:08:42,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:08:42,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2392 transitions. [2023-08-30 01:08:42,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 299.0) internal successors, (2392), 8 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:42,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 701.0) internal successors, (6309), 9 states have internal predecessors, (6309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:42,882 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 701.0) internal successors, (6309), 9 states have internal predecessors, (6309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:42,883 INFO L175 Difference]: Start difference. First operand has 76 places, 99 transitions, 415 flow. Second operand 8 states and 2392 transitions. [2023-08-30 01:08:42,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 223 transitions, 1247 flow [2023-08-30 01:08:42,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 223 transitions, 1243 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:08:42,890 INFO L231 Difference]: Finished difference. Result has 86 places, 119 transitions, 713 flow [2023-08-30 01:08:42,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=713, PETRI_PLACES=86, PETRI_TRANSITIONS=119} [2023-08-30 01:08:42,894 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 5 predicate places. [2023-08-30 01:08:42,894 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 119 transitions, 713 flow [2023-08-30 01:08:42,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 274.125) internal successors, (2193), 8 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:42,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:08:42,896 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 01:08:42,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 01:08:43,099 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 01:08:43,099 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 01:08:43,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:08:43,100 INFO L85 PathProgramCache]: Analyzing trace with hash 593951598, now seen corresponding path program 2 times [2023-08-30 01:08:43,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:08:43,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734801538] [2023-08-30 01:08:43,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:08:43,101 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 01:08:43,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:08:43,102 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 01:08:43,104 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 01:08:43,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:08:43,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:08:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 01:08:43,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:08:43,284 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:08:43,284 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 01:08:43,421 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 01:08:43,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:08:43,900 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 01:08:43,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:08:43,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734801538] [2023-08-30 01:08:43,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734801538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:08:43,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:08:43,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:08:43,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024813922] [2023-08-30 01:08:43,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:08:43,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:08:43,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:08:43,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:08:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:08:50,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 701 [2023-08-30 01:08:50,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 119 transitions, 713 flow. Second operand has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:08:50,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:08:50,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 701 [2023-08-30 01:08:50,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:08:54,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:08:56,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:08:57,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:08:59,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:02,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:03,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:05,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:06,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:07,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:09,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:11,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:12,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:14,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:15,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:17,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:18,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:20,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:22,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:24,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:09:39,827 INFO L130 PetriNetUnfolder]: 128680/158615 cut-off events. [2023-08-30 01:09:39,827 INFO L131 PetriNetUnfolder]: For 332/332 co-relation queries the response was YES. [2023-08-30 01:09:40,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317740 conditions, 158615 events. 128680/158615 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 8338. Compared 888860 event pairs, 59982 based on Foata normal form. 16/42996 useless extension candidates. Maximal degree in co-relation 317719. Up to 24235 conditions per place. [2023-08-30 01:09:40,774 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 536 selfloop transitions, 71 changer transitions 0/612 dead transitions. [2023-08-30 01:09:40,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 612 transitions, 3375 flow [2023-08-30 01:09:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 01:09:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 01:09:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4593 transitions. [2023-08-30 01:09:40,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368045649072753 [2023-08-30 01:09:40,787 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4593 transitions. [2023-08-30 01:09:40,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4593 transitions. [2023-08-30 01:09:40,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:09:40,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4593 transitions. [2023-08-30 01:09:40,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 306.2) internal successors, (4593), 15 states have internal predecessors, (4593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:40,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 701.0) internal successors, (11216), 16 states have internal predecessors, (11216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:40,814 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 701.0) internal successors, (11216), 16 states have internal predecessors, (11216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:40,814 INFO L175 Difference]: Start difference. First operand has 86 places, 119 transitions, 713 flow. Second operand 15 states and 4593 transitions. [2023-08-30 01:09:40,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 612 transitions, 3375 flow [2023-08-30 01:09:40,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 612 transitions, 3375 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 01:09:40,998 INFO L231 Difference]: Finished difference. Result has 108 places, 156 transitions, 1181 flow [2023-08-30 01:09:40,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1181, PETRI_PLACES=108, PETRI_TRANSITIONS=156} [2023-08-30 01:09:41,000 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 27 predicate places. [2023-08-30 01:09:41,000 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 156 transitions, 1181 flow [2023-08-30 01:09:41,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:41,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:09:41,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:09:41,010 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 01:09:41,202 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 01:09:41,202 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 01:09:41,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:09:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1263115871, now seen corresponding path program 1 times [2023-08-30 01:09:41,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:09:41,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197969784] [2023-08-30 01:09:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:09:41,204 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 01:09:41,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:09:41,205 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 01:09:41,208 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 01:09:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:09:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 01:09:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:09:41,444 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:09:41,444 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 01:09:41,530 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 01:09:41,530 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 01:09:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:09:41,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 01:09:41,685 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 01:09:41,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 01:09:41,751 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 01:09:41,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 01:09:41,810 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 01:09:41,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:09:46,254 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 01:09:46,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:09:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197969784] [2023-08-30 01:09:46,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197969784] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:09:46,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:09:46,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 01:09:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789875703] [2023-08-30 01:09:46,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:09:46,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:09:46,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:09:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:09:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:09:48,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:09:53,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:09:58,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 701 [2023-08-30 01:09:58,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 156 transitions, 1181 flow. Second operand has 10 states, 10 states have (on average 250.4) internal successors, (2504), 10 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:09:58,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:09:58,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 701 [2023-08-30 01:09:58,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:10:10,635 WARN L222 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:10:12,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:10:14,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:10:16,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:10:18,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:10:21,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:10:23,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:10:25,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:10:27,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 01:10:29,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:10:31,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:10:33,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 01:11:17,212 INFO L130 PetriNetUnfolder]: 237548/292782 cut-off events. [2023-08-30 01:11:17,212 INFO L131 PetriNetUnfolder]: For 614/614 co-relation queries the response was YES. [2023-08-30 01:11:18,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586616 conditions, 292782 events. 237548/292782 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 12232. Compared 1729078 event pairs, 110736 based on Foata normal form. 3/79908 useless extension candidates. Maximal degree in co-relation 586585. Up to 72684 conditions per place. [2023-08-30 01:11:19,436 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 467 selfloop transitions, 127 changer transitions 0/599 dead transitions. [2023-08-30 01:11:19,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 599 transitions, 3927 flow [2023-08-30 01:11:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 01:11:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 01:11:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5766 transitions. [2023-08-30 01:11:19,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39168534746280825 [2023-08-30 01:11:19,453 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5766 transitions. [2023-08-30 01:11:19,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5766 transitions. [2023-08-30 01:11:19,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:11:19,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5766 transitions. [2023-08-30 01:11:19,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 274.57142857142856) internal successors, (5766), 21 states have internal predecessors, (5766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:19,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 701.0) internal successors, (15422), 22 states have internal predecessors, (15422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:19,491 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 701.0) internal successors, (15422), 22 states have internal predecessors, (15422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:19,491 INFO L175 Difference]: Start difference. First operand has 108 places, 156 transitions, 1181 flow. Second operand 21 states and 5766 transitions. [2023-08-30 01:11:19,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 599 transitions, 3927 flow [2023-08-30 01:11:19,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 599 transitions, 3740 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-08-30 01:11:19,676 INFO L231 Difference]: Finished difference. Result has 132 places, 213 transitions, 1981 flow [2023-08-30 01:11:19,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1981, PETRI_PLACES=132, PETRI_TRANSITIONS=213} [2023-08-30 01:11:19,677 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 51 predicate places. [2023-08-30 01:11:19,677 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 213 transitions, 1981 flow [2023-08-30 01:11:19,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 250.4) internal successors, (2504), 10 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:11:19,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:11:19,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:11:19,701 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 (8)] Ended with exit code 0 [2023-08-30 01:11:19,888 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 01:11:19,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-08-30 01:11:19,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:11:19,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1263115909, now seen corresponding path program 1 times [2023-08-30 01:11:19,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:11:19,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453168397] [2023-08-30 01:11:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:11:19,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:11:19,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:11:19,891 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 01:11:19,892 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 01:11:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:11:20,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:11:20,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:11:20,143 INFO L321 Elim1Store]: treesize reduction 103, result has 24.8 percent of original size [2023-08-30 01:11:20,143 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 59 [2023-08-30 01:11:20,574 INFO L321 Elim1Store]: treesize reduction 48, result has 68.6 percent of original size [2023-08-30 01:11:20,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 163 [2023-08-30 01:11:31,797 INFO L321 Elim1Store]: treesize reduction 72, result has 75.1 percent of original size [2023-08-30 01:11:31,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 329 Killed by 15