./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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 ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i -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 fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 13:06:23,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 13:06:23,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 13:06:23,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 13:06:23,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 13:06:23,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 13:06:23,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 13:06:23,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 13:06:23,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 13:06:23,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 13:06:23,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 13:06:23,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 13:06:23,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 13:06:23,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 13:06:23,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 13:06:23,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 13:06:23,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 13:06:23,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 13:06:23,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 13:06:23,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 13:06:23,518 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 13:06:23,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 13:06:23,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 13:06:23,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 13:06:23,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 13:06:23,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 13:06:23,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 13:06:23,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 13:06:23,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 13:06:23,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 13:06:23,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 13:06:23,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 13:06:23,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 13:06:23,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 13:06:23,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 13:06:23,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 13:06:23,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 13:06:23,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 13:06:23,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 13:06:23,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 13:06:23,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 13:06:23,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 13:06:23,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 13:06:23,561 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 13:06:23,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 13:06:23,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 13:06:23,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 13:06:23,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 13:06:23,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 13:06:23,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 13:06:23,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 13:06:23,563 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 13:06:23,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 13:06:23,564 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 13:06:23,564 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 13:06:23,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 13:06:23,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 13:06:23,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 13:06:23,565 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 13:06:23,565 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 13:06:23,565 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 13:06:23,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 13:06:23,565 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 13:06:23,565 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 13:06:23,565 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 13:06:23,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 13:06:23,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 13:06:23,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 13:06:23,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 13:06:23,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 13:06:23,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 13:06:23,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 13:06:23,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 13:06:23,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae [2022-07-23 13:06:23,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 13:06:23,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 13:06:23,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 13:06:23,806 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 13:06:23,806 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 13:06:23,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2022-07-23 13:06:23,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10adff9a5/ff7f04ef44d749d49fd1acf43345b439/FLAG1a407d533 [2022-07-23 13:06:24,264 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 13:06:24,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2022-07-23 13:06:24,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10adff9a5/ff7f04ef44d749d49fd1acf43345b439/FLAG1a407d533 [2022-07-23 13:06:24,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10adff9a5/ff7f04ef44d749d49fd1acf43345b439 [2022-07-23 13:06:24,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 13:06:24,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 13:06:24,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 13:06:24,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 13:06:24,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 13:06:24,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:06:24" (1/1) ... [2022-07-23 13:06:24,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45a29ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:24, skipping insertion in model container [2022-07-23 13:06:24,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:06:24" (1/1) ... [2022-07-23 13:06:24,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 13:06:24,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 13:06:24,926 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2022-07-23 13:06:25,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:06:25,052 ERROR L326 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) [2022-07-23 13:06:25,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@65ad5ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:25, skipping insertion in model container [2022-07-23 13:06:25,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 13:06:25,053 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-23 13:06:25,054 INFO L158 Benchmark]: Toolchain (without parser) took 436.16ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 67.8MB in the beginning and 78.5MB in the end (delta: -10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-23 13:06:25,055 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory was 56.8MB in the beginning and 56.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 13:06:25,055 INFO L158 Benchmark]: CACSL2BoogieTranslator took 434.44ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 67.6MB in the beginning and 78.5MB in the end (delta: -10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-23 13:06:25,057 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory was 56.8MB in the beginning and 56.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 434.44ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 67.6MB in the beginning and 78.5MB in the end (delta: -10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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 ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i -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 fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 13:06:26,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 13:06:26,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 13:06:26,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 13:06:26,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 13:06:26,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 13:06:26,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 13:06:26,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 13:06:26,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 13:06:26,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 13:06:26,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 13:06:26,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 13:06:26,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 13:06:26,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 13:06:26,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 13:06:26,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 13:06:26,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 13:06:26,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 13:06:26,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 13:06:26,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 13:06:26,667 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 13:06:26,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 13:06:26,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 13:06:26,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 13:06:26,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 13:06:26,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 13:06:26,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 13:06:26,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 13:06:26,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 13:06:26,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 13:06:26,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 13:06:26,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 13:06:26,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 13:06:26,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 13:06:26,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 13:06:26,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 13:06:26,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 13:06:26,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 13:06:26,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 13:06:26,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 13:06:26,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 13:06:26,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 13:06:26,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 13:06:26,728 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 13:06:26,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 13:06:26,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 13:06:26,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 13:06:26,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 13:06:26,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 13:06:26,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 13:06:26,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 13:06:26,730 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 13:06:26,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 13:06:26,730 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 13:06:26,731 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 13:06:26,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 13:06:26,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 13:06:26,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 13:06:26,738 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 13:06:26,739 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 13:06:26,739 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 13:06:26,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 13:06:26,739 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 13:06:26,739 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 13:06:26,739 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 13:06:26,740 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 13:06:26,740 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 13:06:26,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 13:06:26,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 13:06:26,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 13:06:26,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 13:06:26,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 13:06:26,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 13:06:26,741 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 13:06:26,741 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 13:06:26,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 13:06:26,742 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae [2022-07-23 13:06:27,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 13:06:27,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 13:06:27,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 13:06:27,034 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 13:06:27,035 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 13:06:27,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2022-07-23 13:06:27,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e8dd21bb/67730542a78f4779b50603303a03ac07/FLAG30a5b5027 [2022-07-23 13:06:27,534 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 13:06:27,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2022-07-23 13:06:27,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e8dd21bb/67730542a78f4779b50603303a03ac07/FLAG30a5b5027 [2022-07-23 13:06:27,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e8dd21bb/67730542a78f4779b50603303a03ac07 [2022-07-23 13:06:27,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 13:06:27,882 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 13:06:27,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 13:06:27,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 13:06:27,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 13:06:27,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:06:27" (1/1) ... [2022-07-23 13:06:27,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5467ba96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:27, skipping insertion in model container [2022-07-23 13:06:27,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:06:27" (1/1) ... [2022-07-23 13:06:27,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 13:06:27,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 13:06:28,264 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2022-07-23 13:06:28,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:06:28,465 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-23 13:06:28,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 13:06:28,511 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2022-07-23 13:06:28,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:06:28,651 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 13:06:28,676 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2022-07-23 13:06:28,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:06:28,799 INFO L208 MainTranslator]: Completed translation [2022-07-23 13:06:28,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28 WrapperNode [2022-07-23 13:06:28,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 13:06:28,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 13:06:28,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 13:06:28,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 13:06:28,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28" (1/1) ... [2022-07-23 13:06:28,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28" (1/1) ... [2022-07-23 13:06:28,943 INFO L137 Inliner]: procedures = 180, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2491 [2022-07-23 13:06:28,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 13:06:28,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 13:06:28,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 13:06:28,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 13:06:28,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28" (1/1) ... [2022-07-23 13:06:28,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28" (1/1) ... [2022-07-23 13:06:28,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28" (1/1) ... [2022-07-23 13:06:28,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28" (1/1) ... [2022-07-23 13:06:29,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28" (1/1) ... [2022-07-23 13:06:29,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28" (1/1) ... [2022-07-23 13:06:29,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28" (1/1) ... [2022-07-23 13:06:29,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 13:06:29,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 13:06:29,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 13:06:29,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 13:06:29,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28" (1/1) ... [2022-07-23 13:06:29,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 13:06:29,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:06:29,117 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) [2022-07-23 13:06:29,149 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 [2022-07-23 13:06:29,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-23 13:06:29,162 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-07-23 13:06:29,163 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-07-23 13:06:29,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-23 13:06:29,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-23 13:06:29,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-23 13:06:29,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-23 13:06:29,163 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-23 13:06:29,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 13:06:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 13:06:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 13:06:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 13:06:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-23 13:06:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 13:06:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 13:06:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-23 13:06:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-23 13:06:29,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 13:06:29,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 13:06:29,441 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 13:06:29,442 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 13:06:29,445 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-23 13:06:35,735 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 13:06:35,772 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 13:06:35,772 INFO L299 CfgBuilder]: Removed 168 assume(true) statements. [2022-07-23 13:06:35,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 01:06:35 BoogieIcfgContainer [2022-07-23 13:06:35,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 13:06:35,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 13:06:35,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 13:06:35,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 13:06:35,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 01:06:27" (1/3) ... [2022-07-23 13:06:35,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bea7d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 01:06:35, skipping insertion in model container [2022-07-23 13:06:35,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:06:28" (2/3) ... [2022-07-23 13:06:35,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bea7d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 01:06:35, skipping insertion in model container [2022-07-23 13:06:35,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 01:06:35" (3/3) ... [2022-07-23 13:06:35,797 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-3.i [2022-07-23 13:06:35,822 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 13:06:35,822 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1193 error locations. [2022-07-23 13:06:35,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 13:06:35,896 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f85adf3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1c83171a [2022-07-23 13:06:35,897 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1193 error locations. [2022-07-23 13:06:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-23 13:06:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-23 13:06:35,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:06:35,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-23 13:06:35,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:06:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:06:35,916 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2022-07-23 13:06:35,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:06:35,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353121874] [2022-07-23 13:06:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:06:35,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:06:35,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:06:35,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:06:35,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 13:06:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:06:36,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:06:36,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:06:36,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:06:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:06:36,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:06:36,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:06:36,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353121874] [2022-07-23 13:06:36,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353121874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:06:36,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:06:36,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 13:06:36,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910049494] [2022-07-23 13:06:36,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:06:36,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:06:36,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:06:36,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:06:36,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:06:36,321 INFO L87 Difference]: Start difference. First operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:06:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:06:39,616 INFO L93 Difference]: Finished difference Result 3281 states and 3483 transitions. [2022-07-23 13:06:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:06:39,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-23 13:06:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:06:39,638 INFO L225 Difference]: With dead ends: 3281 [2022-07-23 13:06:39,639 INFO L226 Difference]: Without dead ends: 3279 [2022-07-23 13:06:39,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:06:39,642 INFO L413 NwaCegarLoop]: 1665 mSDtfsCounter, 2318 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:06:39,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2328 Valid, 2230 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-23 13:06:39,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2022-07-23 13:06:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2579. [2022-07-23 13:06:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 1398 states have (on average 2.067238912732475) internal successors, (2890), 2563 states have internal predecessors, (2890), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-23 13:06:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 2922 transitions. [2022-07-23 13:06:39,734 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 2922 transitions. Word has length 3 [2022-07-23 13:06:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:06:39,734 INFO L495 AbstractCegarLoop]: Abstraction has 2579 states and 2922 transitions. [2022-07-23 13:06:39,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:06:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 2922 transitions. [2022-07-23 13:06:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-23 13:06:39,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:06:39,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-23 13:06:39,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-23 13:06:39,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:06:39,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:06:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:06:39,944 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2022-07-23 13:06:39,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:06:39,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222851523] [2022-07-23 13:06:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:06:39,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:06:39,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:06:39,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:06:39,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 13:06:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:06:40,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 13:06:40,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:06:40,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:06:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:06:40,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:06:40,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:06:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222851523] [2022-07-23 13:06:40,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222851523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:06:40,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:06:40,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 13:06:40,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209078889] [2022-07-23 13:06:40,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:06:40,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:06:40,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:06:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:06:40,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:06:40,184 INFO L87 Difference]: Start difference. First operand 2579 states and 2922 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:06:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:06:44,359 INFO L93 Difference]: Finished difference Result 3727 states and 4170 transitions. [2022-07-23 13:06:44,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:06:44,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-23 13:06:44,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:06:44,368 INFO L225 Difference]: With dead ends: 3727 [2022-07-23 13:06:44,368 INFO L226 Difference]: Without dead ends: 3727 [2022-07-23 13:06:44,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:06:44,369 INFO L413 NwaCegarLoop]: 2045 mSDtfsCounter, 1240 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 3433 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:06:44,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1244 Valid, 3433 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-23 13:06:44,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2022-07-23 13:06:44,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3028. [2022-07-23 13:06:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 1845 states have (on average 2.0233062330623306) internal successors, (3733), 3009 states have internal predecessors, (3733), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-23 13:06:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 3771 transitions. [2022-07-23 13:06:44,431 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 3771 transitions. Word has length 3 [2022-07-23 13:06:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:06:44,432 INFO L495 AbstractCegarLoop]: Abstraction has 3028 states and 3771 transitions. [2022-07-23 13:06:44,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:06:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 3771 transitions. [2022-07-23 13:06:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 13:06:44,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:06:44,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:06:44,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-23 13:06:44,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:06:44,641 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:06:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:06:44,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2022-07-23 13:06:44,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:06:44,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868347550] [2022-07-23 13:06:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:06:44,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:06:44,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:06:44,644 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:06:44,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 13:06:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:06:44,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 13:06:44,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:06:44,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:06:44,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:06:44,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 13:06:44,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 13:06:44,925 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 13:06:44,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-23 13:06:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:06:44,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:06:44,945 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:06:44,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868347550] [2022-07-23 13:06:44,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868347550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:06:44,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:06:44,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:06:44,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385899538] [2022-07-23 13:06:44,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:06:44,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:06:44,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:06:44,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:06:44,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:06:44,950 INFO L87 Difference]: Start difference. First operand 3028 states and 3771 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:06:54,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:06:54,021 INFO L93 Difference]: Finished difference Result 6006 states and 6937 transitions. [2022-07-23 13:06:54,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:06:54,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 13:06:54,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:06:54,037 INFO L225 Difference]: With dead ends: 6006 [2022-07-23 13:06:54,037 INFO L226 Difference]: Without dead ends: 6006 [2022-07-23 13:06:54,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:06:54,040 INFO L413 NwaCegarLoop]: 981 mSDtfsCounter, 3127 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 4719 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3137 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 4747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-07-23 13:06:54,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3137 Valid, 3162 Invalid, 4747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4719 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-07-23 13:06:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6006 states. [2022-07-23 13:06:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6006 to 3747. [2022-07-23 13:06:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 2564 states have (on average 2.0514820592823715) internal successors, (5260), 3722 states have internal predecessors, (5260), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:06:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 5310 transitions. [2022-07-23 13:06:54,139 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 5310 transitions. Word has length 7 [2022-07-23 13:06:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:06:54,140 INFO L495 AbstractCegarLoop]: Abstraction has 3747 states and 5310 transitions. [2022-07-23 13:06:54,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:06:54,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 5310 transitions. [2022-07-23 13:06:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 13:06:54,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:06:54,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:06:54,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-23 13:06:54,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:06:54,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:06:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:06:54,351 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2022-07-23 13:06:54,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:06:54,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256867240] [2022-07-23 13:06:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:06:54,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:06:54,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:06:54,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:06:54,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 13:06:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:06:54,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:06:54,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:06:54,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:06:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:06:54,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:06:54,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:06:54,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256867240] [2022-07-23 13:06:54,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256867240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:06:54,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:06:54,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 13:06:54,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734332393] [2022-07-23 13:06:54,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:06:54,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:06:54,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:06:54,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:06:54,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:06:54,522 INFO L87 Difference]: Start difference. First operand 3747 states and 5310 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:06:57,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:06:57,275 INFO L93 Difference]: Finished difference Result 4951 states and 6827 transitions. [2022-07-23 13:06:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:06:57,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 13:06:57,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:06:57,289 INFO L225 Difference]: With dead ends: 4951 [2022-07-23 13:06:57,289 INFO L226 Difference]: Without dead ends: 4951 [2022-07-23 13:06:57,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:06:57,290 INFO L413 NwaCegarLoop]: 2366 mSDtfsCounter, 1998 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 3212 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-23 13:06:57,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 3212 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-23 13:06:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2022-07-23 13:06:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3656. [2022-07-23 13:06:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 2564 states have (on average 1.968408736349454) internal successors, (5047), 3631 states have internal predecessors, (5047), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:06:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 5097 transitions. [2022-07-23 13:06:57,379 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 5097 transitions. Word has length 8 [2022-07-23 13:06:57,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:06:57,379 INFO L495 AbstractCegarLoop]: Abstraction has 3656 states and 5097 transitions. [2022-07-23 13:06:57,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:06:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 5097 transitions. [2022-07-23 13:06:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 13:06:57,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:06:57,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:06:57,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-23 13:06:57,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:06:57,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:06:57,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:06:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2022-07-23 13:06:57,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:06:57,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273845880] [2022-07-23 13:06:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:06:57,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:06:57,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:06:57,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:06:57,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 13:06:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:06:57,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 13:06:57,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:06:57,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:06:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:06:57,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:06:57,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:06:57,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273845880] [2022-07-23 13:06:57,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273845880] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:06:57,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:06:57,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 13:06:57,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597622129] [2022-07-23 13:06:57,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:06:57,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:06:57,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:06:57,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:06:57,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:06:57,777 INFO L87 Difference]: Start difference. First operand 3656 states and 5097 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:02,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:02,049 INFO L93 Difference]: Finished difference Result 5371 states and 7455 transitions. [2022-07-23 13:07:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:07:02,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 13:07:02,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:02,065 INFO L225 Difference]: With dead ends: 5371 [2022-07-23 13:07:02,065 INFO L226 Difference]: Without dead ends: 5371 [2022-07-23 13:07:02,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:07:02,066 INFO L413 NwaCegarLoop]: 2746 mSDtfsCounter, 1369 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 3931 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:02,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 3931 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-23 13:07:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2022-07-23 13:07:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 3978. [2022-07-23 13:07:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 2896 states have (on average 1.9540745856353592) internal successors, (5659), 3953 states have internal predecessors, (5659), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5709 transitions. [2022-07-23 13:07:02,148 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5709 transitions. Word has length 8 [2022-07-23 13:07:02,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:02,148 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 5709 transitions. [2022-07-23 13:07:02,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5709 transitions. [2022-07-23 13:07:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 13:07:02,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:02,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:02,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-23 13:07:02,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:02,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2022-07-23 13:07:02,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:02,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828270414] [2022-07-23 13:07:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:02,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:02,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:02,360 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:02,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 13:07:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 13:07:02,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:02,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:02,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:02,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828270414] [2022-07-23 13:07:02,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828270414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:02,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:02,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:02,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830458202] [2022-07-23 13:07:02,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:02,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:07:02,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:07:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:07:02,503 INFO L87 Difference]: Start difference. First operand 3978 states and 5709 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:02,532 INFO L93 Difference]: Finished difference Result 3918 states and 5623 transitions. [2022-07-23 13:07:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:07:02,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-23 13:07:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:02,541 INFO L225 Difference]: With dead ends: 3918 [2022-07-23 13:07:02,541 INFO L226 Difference]: Without dead ends: 3918 [2022-07-23 13:07:02,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:07:02,542 INFO L413 NwaCegarLoop]: 2407 mSDtfsCounter, 1197 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 3623 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:02,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1201 Valid, 3623 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:07:02,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2022-07-23 13:07:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3918. [2022-07-23 13:07:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 2860 states have (on average 1.9486013986013986) internal successors, (5573), 3893 states have internal predecessors, (5573), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 5623 transitions. [2022-07-23 13:07:02,597 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 5623 transitions. Word has length 11 [2022-07-23 13:07:02,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:02,598 INFO L495 AbstractCegarLoop]: Abstraction has 3918 states and 5623 transitions. [2022-07-23 13:07:02,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:02,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 5623 transitions. [2022-07-23 13:07:02,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 13:07:02,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:02,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:02,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:02,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:02,807 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2022-07-23 13:07:02,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:02,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921691976] [2022-07-23 13:07:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:02,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:02,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:02,824 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:02,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 13:07:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:02,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:07:03,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:03,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:03,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:03,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921691976] [2022-07-23 13:07:03,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921691976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:03,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:03,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:07:03,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658376088] [2022-07-23 13:07:03,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:03,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:03,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:03,018 INFO L87 Difference]: Start difference. First operand 3918 states and 5623 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:03,085 INFO L93 Difference]: Finished difference Result 3890 states and 5567 transitions. [2022-07-23 13:07:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:07:03,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-23 13:07:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:03,099 INFO L225 Difference]: With dead ends: 3890 [2022-07-23 13:07:03,100 INFO L226 Difference]: Without dead ends: 3890 [2022-07-23 13:07:03,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:03,101 INFO L413 NwaCegarLoop]: 2362 mSDtfsCounter, 1168 mSDsluCounter, 3571 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 5933 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:03,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 5933 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:07:03,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2022-07-23 13:07:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3888. [2022-07-23 13:07:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 2844 states have (on average 1.939170182841069) internal successors, (5515), 3863 states have internal predecessors, (5515), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 5565 transitions. [2022-07-23 13:07:03,166 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 5565 transitions. Word has length 13 [2022-07-23 13:07:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:03,166 INFO L495 AbstractCegarLoop]: Abstraction has 3888 states and 5565 transitions. [2022-07-23 13:07:03,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:03,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 5565 transitions. [2022-07-23 13:07:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 13:07:03,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:03,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:03,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:03,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:03,376 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:03,377 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2022-07-23 13:07:03,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:03,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041496490] [2022-07-23 13:07:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:03,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:03,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:03,384 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:03,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 13:07:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:03,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 13:07:03,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:03,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:03,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:03,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041496490] [2022-07-23 13:07:03,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041496490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:03,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:03,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:03,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122295852] [2022-07-23 13:07:03,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:03,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:07:03,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:03,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:07:03,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:07:03,580 INFO L87 Difference]: Start difference. First operand 3888 states and 5565 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:03,641 INFO L93 Difference]: Finished difference Result 5514 states and 7318 transitions. [2022-07-23 13:07:03,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:07:03,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-23 13:07:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:03,651 INFO L225 Difference]: With dead ends: 5514 [2022-07-23 13:07:03,651 INFO L226 Difference]: Without dead ends: 5514 [2022-07-23 13:07:03,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:07:03,653 INFO L413 NwaCegarLoop]: 4091 mSDtfsCounter, 2288 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 5893 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:03,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2298 Valid, 5893 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:07:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5514 states. [2022-07-23 13:07:03,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5514 to 3828. [2022-07-23 13:07:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 2808 states have (on average 1.9334045584045585) internal successors, (5429), 3803 states have internal predecessors, (5429), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:03,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 5479 transitions. [2022-07-23 13:07:03,702 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 5479 transitions. Word has length 20 [2022-07-23 13:07:03,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:03,703 INFO L495 AbstractCegarLoop]: Abstraction has 3828 states and 5479 transitions. [2022-07-23 13:07:03,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 5479 transitions. [2022-07-23 13:07:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 13:07:03,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:03,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:03,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:03,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:03,912 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:03,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:03,913 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2022-07-23 13:07:03,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:03,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715893966] [2022-07-23 13:07:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:03,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:03,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:03,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:03,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 13:07:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:04,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 13:07:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:04,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:04,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:04,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715893966] [2022-07-23 13:07:04,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715893966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:04,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:04,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:04,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182572664] [2022-07-23 13:07:04,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:04,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:07:04,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:07:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:07:04,138 INFO L87 Difference]: Start difference. First operand 3828 states and 5479 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:04,176 INFO L93 Difference]: Finished difference Result 5347 states and 7027 transitions. [2022-07-23 13:07:04,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:07:04,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-23 13:07:04,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:04,184 INFO L225 Difference]: With dead ends: 5347 [2022-07-23 13:07:04,185 INFO L226 Difference]: Without dead ends: 5347 [2022-07-23 13:07:04,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:07:04,186 INFO L413 NwaCegarLoop]: 3778 mSDtfsCounter, 2245 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2255 SdHoareTripleChecker+Valid, 5532 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:04,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2255 Valid, 5532 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:07:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5347 states. [2022-07-23 13:07:04,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5347 to 3696. [2022-07-23 13:07:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 2700 states have (on average 1.915185185185185) internal successors, (5171), 3671 states have internal predecessors, (5171), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 5221 transitions. [2022-07-23 13:07:04,229 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 5221 transitions. Word has length 20 [2022-07-23 13:07:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:04,230 INFO L495 AbstractCegarLoop]: Abstraction has 3696 states and 5221 transitions. [2022-07-23 13:07:04,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 5221 transitions. [2022-07-23 13:07:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 13:07:04,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:04,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:04,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:04,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:04,452 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:04,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:04,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2022-07-23 13:07:04,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:04,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961628536] [2022-07-23 13:07:04,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:04,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:04,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:04,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:04,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 13:07:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:04,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:07:04,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:04,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:04,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:04,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961628536] [2022-07-23 13:07:04,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961628536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:04,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:04,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:07:04,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640081948] [2022-07-23 13:07:04,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:04,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:04,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:04,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:04,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:04,680 INFO L87 Difference]: Start difference. First operand 3696 states and 5221 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:04,756 INFO L93 Difference]: Finished difference Result 5312 states and 6961 transitions. [2022-07-23 13:07:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:07:04,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-23 13:07:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:04,765 INFO L225 Difference]: With dead ends: 5312 [2022-07-23 13:07:04,766 INFO L226 Difference]: Without dead ends: 5312 [2022-07-23 13:07:04,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:04,767 INFO L413 NwaCegarLoop]: 3960 mSDtfsCounter, 2216 mSDsluCounter, 5712 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 9672 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:04,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2226 Valid, 9672 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:07:04,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2022-07-23 13:07:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 3666. [2022-07-23 13:07:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2684 states have (on average 1.9049925484351713) internal successors, (5113), 3641 states have internal predecessors, (5113), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5163 transitions. [2022-07-23 13:07:04,832 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5163 transitions. Word has length 22 [2022-07-23 13:07:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:04,833 INFO L495 AbstractCegarLoop]: Abstraction has 3666 states and 5163 transitions. [2022-07-23 13:07:04,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5163 transitions. [2022-07-23 13:07:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 13:07:04,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:04,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:04,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:05,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:05,045 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:05,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:05,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2022-07-23 13:07:05,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:05,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273290070] [2022-07-23 13:07:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:05,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:05,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:05,060 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:05,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 13:07:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:05,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:07:05,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:05,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:05,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:05,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273290070] [2022-07-23 13:07:05,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273290070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:05,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:05,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:07:05,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533751506] [2022-07-23 13:07:05,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:05,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:05,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:05,317 INFO L87 Difference]: Start difference. First operand 3666 states and 5163 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:05,392 INFO L93 Difference]: Finished difference Result 5239 states and 6772 transitions. [2022-07-23 13:07:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:07:05,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-23 13:07:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:05,400 INFO L225 Difference]: With dead ends: 5239 [2022-07-23 13:07:05,401 INFO L226 Difference]: Without dead ends: 5239 [2022-07-23 13:07:05,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:05,401 INFO L413 NwaCegarLoop]: 3885 mSDtfsCounter, 2181 mSDsluCounter, 5597 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 9482 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:05,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2191 Valid, 9482 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:07:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2022-07-23 13:07:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 3604. [2022-07-23 13:07:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 2636 states have (on average 1.8736722306525038) internal successors, (4939), 3579 states have internal predecessors, (4939), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 4989 transitions. [2022-07-23 13:07:05,441 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 4989 transitions. Word has length 22 [2022-07-23 13:07:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:05,441 INFO L495 AbstractCegarLoop]: Abstraction has 3604 states and 4989 transitions. [2022-07-23 13:07:05,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 4989 transitions. [2022-07-23 13:07:05,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 13:07:05,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:05,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:05,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:05,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:05,655 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:05,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2022-07-23 13:07:05,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:05,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981110694] [2022-07-23 13:07:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:05,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:05,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:05,657 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:05,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 13:07:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:05,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 13:07:05,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:05,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:07:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:05,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:05,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981110694] [2022-07-23 13:07:05,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981110694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:05,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:05,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:05,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428026996] [2022-07-23 13:07:05,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:05,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:05,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:05,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:05,870 INFO L87 Difference]: Start difference. First operand 3604 states and 4989 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:09,113 INFO L93 Difference]: Finished difference Result 4225 states and 5525 transitions. [2022-07-23 13:07:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:07:09,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 13:07:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:09,121 INFO L225 Difference]: With dead ends: 4225 [2022-07-23 13:07:09,121 INFO L226 Difference]: Without dead ends: 4225 [2022-07-23 13:07:09,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:09,122 INFO L413 NwaCegarLoop]: 1515 mSDtfsCounter, 3097 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3103 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:09,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3103 Valid, 2793 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-23 13:07:09,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2022-07-23 13:07:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 3600. [2022-07-23 13:07:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 2636 states have (on average 1.8706373292867982) internal successors, (4931), 3575 states have internal predecessors, (4931), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 4981 transitions. [2022-07-23 13:07:09,158 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 4981 transitions. Word has length 27 [2022-07-23 13:07:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:09,158 INFO L495 AbstractCegarLoop]: Abstraction has 3600 states and 4981 transitions. [2022-07-23 13:07:09,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 4981 transitions. [2022-07-23 13:07:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 13:07:09,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:09,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:09,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:09,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:09,366 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:09,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:09,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2022-07-23 13:07:09,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:09,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141755696] [2022-07-23 13:07:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:09,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:09,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:09,380 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:09,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 13:07:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:07:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:09,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:07:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:09,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:09,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:09,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141755696] [2022-07-23 13:07:09,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141755696] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:09,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:09,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:09,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875233046] [2022-07-23 13:07:09,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:09,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:09,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:09,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:09,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:09,664 INFO L87 Difference]: Start difference. First operand 3600 states and 4981 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:14,799 INFO L93 Difference]: Finished difference Result 4679 states and 6151 transitions. [2022-07-23 13:07:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 13:07:14,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 13:07:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:14,806 INFO L225 Difference]: With dead ends: 4679 [2022-07-23 13:07:14,807 INFO L226 Difference]: Without dead ends: 4679 [2022-07-23 13:07:14,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:14,808 INFO L413 NwaCegarLoop]: 1748 mSDtfsCounter, 2279 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2279 SdHoareTripleChecker+Valid, 4099 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:14,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2279 Valid, 4099 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-23 13:07:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2022-07-23 13:07:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 3636. [2022-07-23 13:07:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 2672 states have (on average 1.8607784431137724) internal successors, (4972), 3611 states have internal predecessors, (4972), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 5022 transitions. [2022-07-23 13:07:14,849 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 5022 transitions. Word has length 27 [2022-07-23 13:07:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:14,849 INFO L495 AbstractCegarLoop]: Abstraction has 3636 states and 5022 transitions. [2022-07-23 13:07:14,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 5022 transitions. [2022-07-23 13:07:14,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 13:07:14,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:14,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:14,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:15,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:15,060 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:15,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2022-07-23 13:07:15,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:15,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589534323] [2022-07-23 13:07:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:15,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:15,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:15,075 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:15,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 13:07:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:15,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 13:07:15,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:15,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:07:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:15,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:15,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:15,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589534323] [2022-07-23 13:07:15,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589534323] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:15,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:15,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:15,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990332097] [2022-07-23 13:07:15,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:15,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:15,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:15,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:15,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:15,324 INFO L87 Difference]: Start difference. First operand 3636 states and 5022 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:19,296 INFO L93 Difference]: Finished difference Result 7033 states and 9556 transitions. [2022-07-23 13:07:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 13:07:19,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-23 13:07:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:19,304 INFO L225 Difference]: With dead ends: 7033 [2022-07-23 13:07:19,305 INFO L226 Difference]: Without dead ends: 7033 [2022-07-23 13:07:19,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:19,306 INFO L413 NwaCegarLoop]: 2580 mSDtfsCounter, 4500 mSDsluCounter, 2398 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4507 SdHoareTripleChecker+Valid, 4978 SdHoareTripleChecker+Invalid, 3122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:19,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4507 Valid, 4978 Invalid, 3122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3079 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-23 13:07:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2022-07-23 13:07:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 3632. [2022-07-23 13:07:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 2672 states have (on average 1.8577844311377245) internal successors, (4964), 3607 states have internal predecessors, (4964), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 5014 transitions. [2022-07-23 13:07:19,342 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 5014 transitions. Word has length 36 [2022-07-23 13:07:19,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:19,343 INFO L495 AbstractCegarLoop]: Abstraction has 3632 states and 5014 transitions. [2022-07-23 13:07:19,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 5014 transitions. [2022-07-23 13:07:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 13:07:19,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:19,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:19,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:19,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:19,553 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:19,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2022-07-23 13:07:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:19,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122414673] [2022-07-23 13:07:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:19,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:19,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:19,556 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:19,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 13:07:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:19,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:07:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:19,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:07:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:19,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:19,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:19,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122414673] [2022-07-23 13:07:19,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122414673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:19,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:19,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:19,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36988593] [2022-07-23 13:07:19,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:19,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:19,898 INFO L87 Difference]: Start difference. First operand 3632 states and 5014 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:25,860 INFO L93 Difference]: Finished difference Result 6725 states and 8957 transitions. [2022-07-23 13:07:25,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 13:07:25,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-23 13:07:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:25,869 INFO L225 Difference]: With dead ends: 6725 [2022-07-23 13:07:25,869 INFO L226 Difference]: Without dead ends: 6725 [2022-07-23 13:07:25,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:25,870 INFO L413 NwaCegarLoop]: 2937 mSDtfsCounter, 3252 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 3320 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3256 SdHoareTripleChecker+Valid, 5833 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:25,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3256 Valid, 5833 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3320 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-07-23 13:07:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6725 states. [2022-07-23 13:07:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6725 to 3628. [2022-07-23 13:07:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 2672 states have (on average 1.8547904191616766) internal successors, (4956), 3603 states have internal predecessors, (4956), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 5006 transitions. [2022-07-23 13:07:25,917 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 5006 transitions. Word has length 36 [2022-07-23 13:07:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:25,918 INFO L495 AbstractCegarLoop]: Abstraction has 3628 states and 5006 transitions. [2022-07-23 13:07:25,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 5006 transitions. [2022-07-23 13:07:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 13:07:25,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:25,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:25,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:26,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:26,127 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:26,128 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2022-07-23 13:07:26,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:26,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425396219] [2022-07-23 13:07:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:26,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:26,152 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:26,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 13:07:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:26,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 13:07:26,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:26,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:07:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:26,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:26,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:26,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425396219] [2022-07-23 13:07:26,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425396219] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:26,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:26,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:26,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146548859] [2022-07-23 13:07:26,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:26,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:26,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:26,457 INFO L87 Difference]: Start difference. First operand 3628 states and 5006 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:31,679 INFO L93 Difference]: Finished difference Result 7477 states and 10068 transitions. [2022-07-23 13:07:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 13:07:31,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-23 13:07:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:31,687 INFO L225 Difference]: With dead ends: 7477 [2022-07-23 13:07:31,688 INFO L226 Difference]: Without dead ends: 7477 [2022-07-23 13:07:31,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:31,688 INFO L413 NwaCegarLoop]: 2542 mSDtfsCounter, 4861 mSDsluCounter, 2591 mSDsCounter, 0 mSdLazyCounter, 3342 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4871 SdHoareTripleChecker+Valid, 5133 SdHoareTripleChecker+Invalid, 3393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:31,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4871 Valid, 5133 Invalid, 3393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3342 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-23 13:07:31,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7477 states. [2022-07-23 13:07:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7477 to 3625. [2022-07-23 13:07:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 2672 states have (on average 1.846556886227545) internal successors, (4934), 3600 states have internal predecessors, (4934), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 4984 transitions. [2022-07-23 13:07:31,741 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 4984 transitions. Word has length 36 [2022-07-23 13:07:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:31,741 INFO L495 AbstractCegarLoop]: Abstraction has 3625 states and 4984 transitions. [2022-07-23 13:07:31,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 4984 transitions. [2022-07-23 13:07:31,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 13:07:31,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:31,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:31,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:31,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:31,951 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2022-07-23 13:07:31,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:31,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273805325] [2022-07-23 13:07:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:31,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:31,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:31,954 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:31,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 13:07:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:32,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:07:32,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:32,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:07:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:32,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:32,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:32,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273805325] [2022-07-23 13:07:32,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273805325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:32,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:32,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:32,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109294548] [2022-07-23 13:07:32,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:32,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:32,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:32,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:32,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:32,311 INFO L87 Difference]: Start difference. First operand 3625 states and 4984 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:37,360 INFO L93 Difference]: Finished difference Result 5561 states and 7343 transitions. [2022-07-23 13:07:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 13:07:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-23 13:07:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:37,366 INFO L225 Difference]: With dead ends: 5561 [2022-07-23 13:07:37,366 INFO L226 Difference]: Without dead ends: 5561 [2022-07-23 13:07:37,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:37,367 INFO L413 NwaCegarLoop]: 2838 mSDtfsCounter, 2602 mSDsluCounter, 2469 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2602 SdHoareTripleChecker+Valid, 5307 SdHoareTripleChecker+Invalid, 3003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:37,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2602 Valid, 5307 Invalid, 3003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2991 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-23 13:07:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2022-07-23 13:07:37,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3625. [2022-07-23 13:07:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 2672 states have (on average 1.843562874251497) internal successors, (4926), 3600 states have internal predecessors, (4926), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 4976 transitions. [2022-07-23 13:07:37,399 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 4976 transitions. Word has length 36 [2022-07-23 13:07:37,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:37,399 INFO L495 AbstractCegarLoop]: Abstraction has 3625 states and 4976 transitions. [2022-07-23 13:07:37,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:37,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 4976 transitions. [2022-07-23 13:07:37,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 13:07:37,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:37,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:37,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-23 13:07:37,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:37,608 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:37,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2022-07-23 13:07:37,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:37,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578993713] [2022-07-23 13:07:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:37,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:37,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:37,610 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:37,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 13:07:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:07:37,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:37,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:37,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:37,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578993713] [2022-07-23 13:07:37,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578993713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:37,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:37,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:07:37,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337657386] [2022-07-23 13:07:37,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:37,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:37,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:37,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:37,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:37,831 INFO L87 Difference]: Start difference. First operand 3625 states and 4976 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:37,890 INFO L93 Difference]: Finished difference Result 3613 states and 4952 transitions. [2022-07-23 13:07:37,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:07:37,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-23 13:07:37,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:37,894 INFO L225 Difference]: With dead ends: 3613 [2022-07-23 13:07:37,894 INFO L226 Difference]: Without dead ends: 3613 [2022-07-23 13:07:37,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:37,895 INFO L413 NwaCegarLoop]: 2193 mSDtfsCounter, 1152 mSDsluCounter, 3221 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 5414 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:37,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 5414 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:07:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2022-07-23 13:07:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3613. [2022-07-23 13:07:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 2660 states have (on average 1.8428571428571427) internal successors, (4902), 3588 states have internal predecessors, (4902), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-23 13:07:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 4952 transitions. [2022-07-23 13:07:37,920 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 4952 transitions. Word has length 40 [2022-07-23 13:07:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:37,920 INFO L495 AbstractCegarLoop]: Abstraction has 3613 states and 4952 transitions. [2022-07-23 13:07:37,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 4952 transitions. [2022-07-23 13:07:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 13:07:37,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:37,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:37,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:38,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:38,129 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2022-07-23 13:07:38,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:38,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697642040] [2022-07-23 13:07:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:38,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:38,152 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:38,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 13:07:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:38,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:07:38,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:38,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:38,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:38,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697642040] [2022-07-23 13:07:38,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697642040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:38,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:38,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:38,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011971894] [2022-07-23 13:07:38,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:38,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:07:38,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:38,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:07:38,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:07:38,496 INFO L87 Difference]: Start difference. First operand 3613 states and 4952 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:38,695 INFO L93 Difference]: Finished difference Result 5433 states and 7161 transitions. [2022-07-23 13:07:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:07:38,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-23 13:07:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:38,701 INFO L225 Difference]: With dead ends: 5433 [2022-07-23 13:07:38,701 INFO L226 Difference]: Without dead ends: 5433 [2022-07-23 13:07:38,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:07:38,702 INFO L413 NwaCegarLoop]: 2282 mSDtfsCounter, 1568 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 4321 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:38,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1577 Valid, 4321 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 13:07:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5433 states. [2022-07-23 13:07:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5433 to 4630. [2022-07-23 13:07:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4630 states, 3670 states have (on average 1.8258855585831062) internal successors, (6701), 4595 states have internal predecessors, (6701), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-23 13:07:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4630 states to 4630 states and 6771 transitions. [2022-07-23 13:07:38,737 INFO L78 Accepts]: Start accepts. Automaton has 4630 states and 6771 transitions. Word has length 48 [2022-07-23 13:07:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:38,738 INFO L495 AbstractCegarLoop]: Abstraction has 4630 states and 6771 transitions. [2022-07-23 13:07:38,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4630 states and 6771 transitions. [2022-07-23 13:07:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 13:07:38,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:38,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:38,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:38,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:38,947 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:38,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:38,948 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2022-07-23 13:07:38,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:38,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203280338] [2022-07-23 13:07:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:38,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:38,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:38,949 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:38,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 13:07:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:07:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:39,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:39,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:39,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203280338] [2022-07-23 13:07:39,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203280338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:39,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:39,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:07:39,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305264255] [2022-07-23 13:07:39,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:39,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:39,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:39,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:39,222 INFO L87 Difference]: Start difference. First operand 4630 states and 6771 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:39,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:39,301 INFO L93 Difference]: Finished difference Result 5942 states and 8145 transitions. [2022-07-23 13:07:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:07:39,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-23 13:07:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:39,307 INFO L225 Difference]: With dead ends: 5942 [2022-07-23 13:07:39,307 INFO L226 Difference]: Without dead ends: 5942 [2022-07-23 13:07:39,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:39,309 INFO L413 NwaCegarLoop]: 3432 mSDtfsCounter, 2151 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2161 SdHoareTripleChecker+Valid, 8347 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:39,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2161 Valid, 8347 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:07:39,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2022-07-23 13:07:39,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 4588. [2022-07-23 13:07:39,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 3628 states have (on average 1.8277287761852261) internal successors, (6631), 4553 states have internal predecessors, (6631), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-23 13:07:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 6701 transitions. [2022-07-23 13:07:39,349 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 6701 transitions. Word has length 51 [2022-07-23 13:07:39,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:39,350 INFO L495 AbstractCegarLoop]: Abstraction has 4588 states and 6701 transitions. [2022-07-23 13:07:39,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:39,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 6701 transitions. [2022-07-23 13:07:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 13:07:39,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:39,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:39,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:39,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:39,560 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:39,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:39,561 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2022-07-23 13:07:39,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:39,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876942695] [2022-07-23 13:07:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:39,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:39,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:39,562 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:39,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 13:07:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:39,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:07:39,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:39,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:39,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:39,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876942695] [2022-07-23 13:07:39,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876942695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:39,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:39,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:07:39,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956115049] [2022-07-23 13:07:39,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:39,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:39,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:39,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:39,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:39,850 INFO L87 Difference]: Start difference. First operand 4588 states and 6701 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:39,905 INFO L93 Difference]: Finished difference Result 5678 states and 7631 transitions. [2022-07-23 13:07:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:07:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-23 13:07:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:39,911 INFO L225 Difference]: With dead ends: 5678 [2022-07-23 13:07:39,911 INFO L226 Difference]: Without dead ends: 5678 [2022-07-23 13:07:39,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:39,912 INFO L413 NwaCegarLoop]: 3694 mSDtfsCounter, 2142 mSDsluCounter, 5226 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 8920 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:39,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2152 Valid, 8920 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:07:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2022-07-23 13:07:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 4570. [2022-07-23 13:07:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 3610 states have (on average 1.8285318559556787) internal successors, (6601), 4535 states have internal predecessors, (6601), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-23 13:07:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 6671 transitions. [2022-07-23 13:07:39,952 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 6671 transitions. Word has length 54 [2022-07-23 13:07:39,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:39,952 INFO L495 AbstractCegarLoop]: Abstraction has 4570 states and 6671 transitions. [2022-07-23 13:07:39,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 6671 transitions. [2022-07-23 13:07:39,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 13:07:39,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:39,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:39,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:40,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:40,163 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:40,164 INFO L85 PathProgramCache]: Analyzing trace with hash -345082942, now seen corresponding path program 1 times [2022-07-23 13:07:40,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:40,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660961894] [2022-07-23 13:07:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:40,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:40,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:40,166 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:40,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-23 13:07:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:40,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 13:07:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:40,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 13:07:40,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 13:07:40,460 INFO L356 Elim1Store]: treesize reduction 165, result has 13.6 percent of original size [2022-07-23 13:07:40,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 36 [2022-07-23 13:07:40,493 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-23 13:07:40,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 20 [2022-07-23 13:07:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:40,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:40,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:40,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660961894] [2022-07-23 13:07:40,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660961894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:40,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:40,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:07:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457408851] [2022-07-23 13:07:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:40,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:40,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:40,522 INFO L87 Difference]: Start difference. First operand 4570 states and 6671 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:42,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:42,014 INFO L93 Difference]: Finished difference Result 4797 states and 6909 transitions. [2022-07-23 13:07:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:07:42,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-23 13:07:42,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:42,022 INFO L225 Difference]: With dead ends: 4797 [2022-07-23 13:07:42,022 INFO L226 Difference]: Without dead ends: 4797 [2022-07-23 13:07:42,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:42,023 INFO L413 NwaCegarLoop]: 2071 mSDtfsCounter, 1031 mSDsluCounter, 3298 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 5369 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:42,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 5369 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 327 Invalid, 0 Unknown, 132 Unchecked, 1.4s Time] [2022-07-23 13:07:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2022-07-23 13:07:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 4536. [2022-07-23 13:07:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4536 states, 3576 states have (on average 1.8361297539149888) internal successors, (6566), 4501 states have internal predecessors, (6566), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-23 13:07:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4536 states to 4536 states and 6636 transitions. [2022-07-23 13:07:42,062 INFO L78 Accepts]: Start accepts. Automaton has 4536 states and 6636 transitions. Word has length 57 [2022-07-23 13:07:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:42,062 INFO L495 AbstractCegarLoop]: Abstraction has 4536 states and 6636 transitions. [2022-07-23 13:07:42,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:42,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4536 states and 6636 transitions. [2022-07-23 13:07:42,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-23 13:07:42,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:42,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:42,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-23 13:07:42,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:42,272 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:42,272 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2022-07-23 13:07:42,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:42,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560230135] [2022-07-23 13:07:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:42,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:42,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:42,288 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:42,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 13:07:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:42,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:07:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:42,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:42,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:42,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560230135] [2022-07-23 13:07:42,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560230135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:42,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:42,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:42,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591465675] [2022-07-23 13:07:42,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:42,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 13:07:42,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:42,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 13:07:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:07:42,726 INFO L87 Difference]: Start difference. First operand 4536 states and 6636 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:42,883 INFO L93 Difference]: Finished difference Result 6338 states and 8912 transitions. [2022-07-23 13:07:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 13:07:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-23 13:07:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:42,893 INFO L225 Difference]: With dead ends: 6338 [2022-07-23 13:07:42,894 INFO L226 Difference]: Without dead ends: 6338 [2022-07-23 13:07:42,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 13:07:42,894 INFO L413 NwaCegarLoop]: 2414 mSDtfsCounter, 1265 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 4482 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:42,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 4482 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:07:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6338 states. [2022-07-23 13:07:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6338 to 5609. [2022-07-23 13:07:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5609 states, 4641 states have (on average 1.810385692738634) internal successors, (8402), 5563 states have internal predecessors, (8402), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-23 13:07:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5609 states to 5609 states and 8494 transitions. [2022-07-23 13:07:42,972 INFO L78 Accepts]: Start accepts. Automaton has 5609 states and 8494 transitions. Word has length 59 [2022-07-23 13:07:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:42,972 INFO L495 AbstractCegarLoop]: Abstraction has 5609 states and 8494 transitions. [2022-07-23 13:07:42,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5609 states and 8494 transitions. [2022-07-23 13:07:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-23 13:07:42,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:42,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:42,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-23 13:07:43,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:43,183 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:43,183 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2022-07-23 13:07:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:43,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633523604] [2022-07-23 13:07:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:43,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:43,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:43,185 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:43,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 13:07:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:43,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 13:07:43,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:43,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:07:43,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:07:43,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 13:07:43,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 13:07:43,851 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 13:07:43,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-07-23 13:07:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:43,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:43,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:43,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633523604] [2022-07-23 13:07:43,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633523604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:43,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:43,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 13:07:43,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584857756] [2022-07-23 13:07:43,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:43,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:07:43,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:43,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:07:43,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:43,860 INFO L87 Difference]: Start difference. First operand 5609 states and 8494 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:47,636 INFO L93 Difference]: Finished difference Result 8028 states and 12217 transitions. [2022-07-23 13:07:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:07:47,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-23 13:07:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:47,645 INFO L225 Difference]: With dead ends: 8028 [2022-07-23 13:07:47,645 INFO L226 Difference]: Without dead ends: 8028 [2022-07-23 13:07:47,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:07:47,646 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 2474 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:47,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 1766 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-23 13:07:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2022-07-23 13:07:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 5369. [2022-07-23 13:07:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5369 states, 4485 states have (on average 1.7438127090301003) internal successors, (7821), 5323 states have internal predecessors, (7821), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-23 13:07:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5369 states to 5369 states and 7913 transitions. [2022-07-23 13:07:47,738 INFO L78 Accepts]: Start accepts. Automaton has 5369 states and 7913 transitions. Word has length 62 [2022-07-23 13:07:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:47,739 INFO L495 AbstractCegarLoop]: Abstraction has 5369 states and 7913 transitions. [2022-07-23 13:07:47,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 5369 states and 7913 transitions. [2022-07-23 13:07:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 13:07:47,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:47,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:47,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:47,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:47,951 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:47,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2022-07-23 13:07:47,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:47,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883547027] [2022-07-23 13:07:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:47,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:47,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:47,954 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:47,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 13:07:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:48,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 13:07:48,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:48,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:07:48,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 13:07:48,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-23 13:07:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:48,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:48,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:48,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883547027] [2022-07-23 13:07:48,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883547027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:48,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:48,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:07:48,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198321820] [2022-07-23 13:07:48,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:48,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:07:48,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:48,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:07:48,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:48,316 INFO L87 Difference]: Start difference. First operand 5369 states and 7913 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:51,456 INFO L93 Difference]: Finished difference Result 5368 states and 7910 transitions. [2022-07-23 13:07:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 13:07:51,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-23 13:07:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:51,463 INFO L225 Difference]: With dead ends: 5368 [2022-07-23 13:07:51,463 INFO L226 Difference]: Without dead ends: 5368 [2022-07-23 13:07:51,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 13:07:51,464 INFO L413 NwaCegarLoop]: 2112 mSDtfsCounter, 4 mSDsluCounter, 3458 mSDsCounter, 0 mSdLazyCounter, 2883 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5570 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:51,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5570 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2883 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-23 13:07:51,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2022-07-23 13:07:51,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 5368. [2022-07-23 13:07:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 4485 states have (on average 1.7431438127090302) internal successors, (7818), 5322 states have internal predecessors, (7818), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-23 13:07:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 7910 transitions. [2022-07-23 13:07:51,523 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 7910 transitions. Word has length 67 [2022-07-23 13:07:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:51,523 INFO L495 AbstractCegarLoop]: Abstraction has 5368 states and 7910 transitions. [2022-07-23 13:07:51,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 7910 transitions. [2022-07-23 13:07:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 13:07:51,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:51,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:51,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:51,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:51,734 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:51,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:51,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2022-07-23 13:07:51,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:51,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438184927] [2022-07-23 13:07:51,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:51,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:51,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:51,737 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:51,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 13:07:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 13:07:52,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:52,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:07:52,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 13:07:52,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 13:07:52,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-23 13:07:52,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-23 13:07:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:52,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:52,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:52,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438184927] [2022-07-23 13:07:52,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438184927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:52,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:52,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:07:52,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627318335] [2022-07-23 13:07:52,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:52,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:07:52,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:52,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:07:52,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:52,118 INFO L87 Difference]: Start difference. First operand 5368 states and 7910 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:56,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:07:56,574 INFO L93 Difference]: Finished difference Result 5367 states and 7907 transitions. [2022-07-23 13:07:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 13:07:56,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-23 13:07:56,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:07:56,580 INFO L225 Difference]: With dead ends: 5367 [2022-07-23 13:07:56,581 INFO L226 Difference]: Without dead ends: 5367 [2022-07-23 13:07:56,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 13:07:56,581 INFO L413 NwaCegarLoop]: 2112 mSDtfsCounter, 2 mSDsluCounter, 3459 mSDsCounter, 0 mSdLazyCounter, 2880 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5571 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-23 13:07:56,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5571 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2880 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-07-23 13:07:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2022-07-23 13:07:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 5367. [2022-07-23 13:07:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 4482 states have (on average 1.7436412315930387) internal successors, (7815), 5321 states have internal predecessors, (7815), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-23 13:07:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 7907 transitions. [2022-07-23 13:07:56,625 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 7907 transitions. Word has length 67 [2022-07-23 13:07:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:07:56,625 INFO L495 AbstractCegarLoop]: Abstraction has 5367 states and 7907 transitions. [2022-07-23 13:07:56,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:07:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 7907 transitions. [2022-07-23 13:07:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 13:07:56,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:07:56,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:07:56,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-23 13:07:56,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:07:56,836 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:07:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:07:56,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2022-07-23 13:07:56,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:07:56,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283543677] [2022-07-23 13:07:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:07:56,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:07:56,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:07:56,838 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:07:56,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 13:07:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:07:57,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 13:07:57,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:07:57,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:07:57,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 13:07:57,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-23 13:07:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:07:57,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:07:57,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:07:57,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283543677] [2022-07-23 13:07:57,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283543677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:07:57,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:07:57,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:07:57,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363166160] [2022-07-23 13:07:57,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:07:57,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:07:57,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:07:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:07:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:07:57,163 INFO L87 Difference]: Start difference. First operand 5367 states and 7907 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:08:00,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:08:00,316 INFO L93 Difference]: Finished difference Result 5366 states and 7903 transitions. [2022-07-23 13:08:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 13:08:00,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-23 13:08:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:08:00,322 INFO L225 Difference]: With dead ends: 5366 [2022-07-23 13:08:00,322 INFO L226 Difference]: Without dead ends: 5366 [2022-07-23 13:08:00,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 13:08:00,323 INFO L413 NwaCegarLoop]: 2110 mSDtfsCounter, 4 mSDsluCounter, 3455 mSDsCounter, 0 mSdLazyCounter, 2880 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5565 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:08:00,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5565 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2880 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-23 13:08:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5366 states. [2022-07-23 13:08:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5366 to 5366. [2022-07-23 13:08:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5366 states, 4482 states have (on average 1.7427487728692548) internal successors, (7811), 5320 states have internal predecessors, (7811), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-23 13:08:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5366 states to 5366 states and 7903 transitions. [2022-07-23 13:08:00,377 INFO L78 Accepts]: Start accepts. Automaton has 5366 states and 7903 transitions. Word has length 67 [2022-07-23 13:08:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:08:00,377 INFO L495 AbstractCegarLoop]: Abstraction has 5366 states and 7903 transitions. [2022-07-23 13:08:00,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:08:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 5366 states and 7903 transitions. [2022-07-23 13:08:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 13:08:00,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:08:00,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:08:00,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 13:08:00,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:08:00,588 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:08:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:08:00,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2022-07-23 13:08:00,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:08:00,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951753295] [2022-07-23 13:08:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:08:00,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:08:00,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:08:00,591 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:08:00,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-23 13:08:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:08:00,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 13:08:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:08:00,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:08:00,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 13:08:00,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 13:08:00,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-23 13:08:00,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-23 13:08:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:08:00,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:08:00,987 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:08:00,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951753295] [2022-07-23 13:08:00,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951753295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:08:00,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:08:00,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:08:00,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115253465] [2022-07-23 13:08:00,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:08:00,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:08:00,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:08:00,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:08:00,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:08:00,989 INFO L87 Difference]: Start difference. First operand 5366 states and 7903 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:08:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:08:06,057 INFO L93 Difference]: Finished difference Result 5365 states and 7899 transitions. [2022-07-23 13:08:06,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 13:08:06,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-23 13:08:06,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:08:06,062 INFO L225 Difference]: With dead ends: 5365 [2022-07-23 13:08:06,062 INFO L226 Difference]: Without dead ends: 5365 [2022-07-23 13:08:06,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 13:08:06,063 INFO L413 NwaCegarLoop]: 2110 mSDtfsCounter, 2 mSDsluCounter, 3456 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5566 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:08:06,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5566 Invalid, 2878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-23 13:08:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2022-07-23 13:08:06,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 5365. [2022-07-23 13:08:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5365 states, 4478 states have (on average 1.7434122376060741) internal successors, (7807), 5319 states have internal predecessors, (7807), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-23 13:08:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5365 states to 5365 states and 7899 transitions. [2022-07-23 13:08:06,104 INFO L78 Accepts]: Start accepts. Automaton has 5365 states and 7899 transitions. Word has length 67 [2022-07-23 13:08:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:08:06,104 INFO L495 AbstractCegarLoop]: Abstraction has 5365 states and 7899 transitions. [2022-07-23 13:08:06,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:08:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 5365 states and 7899 transitions. [2022-07-23 13:08:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-23 13:08:06,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:08:06,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:08:06,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-23 13:08:06,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:08:06,316 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:08:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:08:06,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1243544783, now seen corresponding path program 1 times [2022-07-23 13:08:06,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:08:06,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426976135] [2022-07-23 13:08:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:08:06,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:08:06,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:08:06,319 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:08:06,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 13:08:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:08:06,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 13:08:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:08:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:08:06,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:08:06,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:08:06,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426976135] [2022-07-23 13:08:06,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426976135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:08:06,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:08:06,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:08:06,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058368917] [2022-07-23 13:08:06,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:08:06,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 13:08:06,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:08:06,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 13:08:06,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 13:08:06,667 INFO L87 Difference]: Start difference. First operand 5365 states and 7899 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 13:08:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:08:06,733 INFO L93 Difference]: Finished difference Result 5368 states and 7908 transitions. [2022-07-23 13:08:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 13:08:06,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-07-23 13:08:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:08:06,748 INFO L225 Difference]: With dead ends: 5368 [2022-07-23 13:08:06,749 INFO L226 Difference]: Without dead ends: 5368 [2022-07-23 13:08:06,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:08:06,750 INFO L413 NwaCegarLoop]: 2109 mSDtfsCounter, 2 mSDsluCounter, 4210 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6319 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:08:06,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6319 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:08:06,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2022-07-23 13:08:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 5368. [2022-07-23 13:08:06,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 4480 states have (on average 1.7433035714285714) internal successors, (7810), 5322 states have internal predecessors, (7810), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-23 13:08:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 7908 transitions. [2022-07-23 13:08:06,802 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 7908 transitions. Word has length 75 [2022-07-23 13:08:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:08:06,802 INFO L495 AbstractCegarLoop]: Abstraction has 5368 states and 7908 transitions. [2022-07-23 13:08:06,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 13:08:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 7908 transitions. [2022-07-23 13:08:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-23 13:08:06,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:08:06,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:08:06,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-23 13:08:07,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:08:07,014 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:08:07,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:08:07,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1194961360, now seen corresponding path program 1 times [2022-07-23 13:08:07,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:08:07,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640721559] [2022-07-23 13:08:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:08:07,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:08:07,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:08:07,016 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:08:07,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-23 13:08:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:08:07,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 13:08:07,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:08:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:08:07,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:08:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:08:07,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:08:07,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640721559] [2022-07-23 13:08:07,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640721559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:08:07,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:08:07,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-23 13:08:07,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141606836] [2022-07-23 13:08:07,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 13:08:07,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 13:08:07,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:08:07,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 13:08:07,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 13:08:07,430 INFO L87 Difference]: Start difference. First operand 5368 states and 7908 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 13:08:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:08:07,602 INFO L93 Difference]: Finished difference Result 5380 states and 7930 transitions. [2022-07-23 13:08:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 13:08:07,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2022-07-23 13:08:07,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:08:07,614 INFO L225 Difference]: With dead ends: 5380 [2022-07-23 13:08:07,614 INFO L226 Difference]: Without dead ends: 5380 [2022-07-23 13:08:07,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-07-23 13:08:07,615 INFO L413 NwaCegarLoop]: 2109 mSDtfsCounter, 12 mSDsluCounter, 12611 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14720 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:08:07,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 14720 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:08:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2022-07-23 13:08:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 5378. [2022-07-23 13:08:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5378 states, 4489 states have (on average 1.7431499220316329) internal successors, (7825), 5331 states have internal predecessors, (7825), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-23 13:08:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5378 states to 5378 states and 7923 transitions. [2022-07-23 13:08:07,661 INFO L78 Accepts]: Start accepts. Automaton has 5378 states and 7923 transitions. Word has length 76 [2022-07-23 13:08:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:08:07,662 INFO L495 AbstractCegarLoop]: Abstraction has 5378 states and 7923 transitions. [2022-07-23 13:08:07,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 13:08:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 5378 states and 7923 transitions. [2022-07-23 13:08:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-23 13:08:07,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:08:07,663 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:08:07,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-23 13:08:07,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:08:07,873 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:08:07,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:08:07,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1708838159, now seen corresponding path program 2 times [2022-07-23 13:08:07,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:08:07,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66165271] [2022-07-23 13:08:07,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:08:07,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:08:07,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:08:07,876 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:08:07,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-23 13:08:08,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:08:08,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:08:08,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 13:08:08,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:08:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:08:08,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:08:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:08:08,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:08:08,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66165271] [2022-07-23 13:08:08,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66165271] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:08:08,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:08:08,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-23 13:08:08,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944870417] [2022-07-23 13:08:08,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 13:08:08,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 13:08:08,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:08:08,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 13:08:08,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-23 13:08:08,673 INFO L87 Difference]: Start difference. First operand 5378 states and 7923 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 13:08:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:08:09,265 INFO L93 Difference]: Finished difference Result 5399 states and 7971 transitions. [2022-07-23 13:08:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-23 13:08:09,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 79 [2022-07-23 13:08:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:08:09,281 INFO L225 Difference]: With dead ends: 5399 [2022-07-23 13:08:09,282 INFO L226 Difference]: Without dead ends: 5395 [2022-07-23 13:08:09,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2022-07-23 13:08:09,283 INFO L413 NwaCegarLoop]: 2112 mSDtfsCounter, 56 mSDsluCounter, 16839 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 18951 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 13:08:09,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 18951 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 13:08:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-07-23 13:08:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 5387. [2022-07-23 13:08:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5387 states, 4498 states have (on average 1.7423299244108492) internal successors, (7837), 5340 states have internal predecessors, (7837), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-23 13:08:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 7935 transitions. [2022-07-23 13:08:09,347 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 7935 transitions. Word has length 79 [2022-07-23 13:08:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:08:09,348 INFO L495 AbstractCegarLoop]: Abstraction has 5387 states and 7935 transitions. [2022-07-23 13:08:09,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 13:08:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 7935 transitions. [2022-07-23 13:08:09,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-23 13:08:09,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:08:09,349 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:08:09,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-23 13:08:09,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:08:09,560 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:08:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:08:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1472099985, now seen corresponding path program 3 times [2022-07-23 13:08:09,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:08:09,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864043118] [2022-07-23 13:08:09,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 13:08:09,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:08:09,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:08:09,563 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:08:09,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-23 13:08:10,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-23 13:08:10,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:08:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 13:08:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:08:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:08:10,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:08:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:08:11,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:08:11,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864043118] [2022-07-23 13:08:11,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864043118] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:08:11,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:08:11,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-23 13:08:11,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741519820] [2022-07-23 13:08:11,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 13:08:11,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 13:08:11,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:08:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 13:08:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-23 13:08:11,050 INFO L87 Difference]: Start difference. First operand 5387 states and 7935 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 13:08:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:08:13,966 INFO L93 Difference]: Finished difference Result 5429 states and 8072 transitions. [2022-07-23 13:08:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-23 13:08:13,967 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 85 [2022-07-23 13:08:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:08:13,983 INFO L225 Difference]: With dead ends: 5429 [2022-07-23 13:08:13,984 INFO L226 Difference]: Without dead ends: 5423 [2022-07-23 13:08:13,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2022-07-23 13:08:13,985 INFO L413 NwaCegarLoop]: 2116 mSDtfsCounter, 189 mSDsluCounter, 23219 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 25335 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:08:13,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 25335 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-23 13:08:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5423 states. [2022-07-23 13:08:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5423 to 5405. [2022-07-23 13:08:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 4516 states have (on average 1.7404782993799823) internal successors, (7860), 5358 states have internal predecessors, (7860), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-23 13:08:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 7958 transitions. [2022-07-23 13:08:14,053 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 7958 transitions. Word has length 85 [2022-07-23 13:08:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:08:14,053 INFO L495 AbstractCegarLoop]: Abstraction has 5405 states and 7958 transitions. [2022-07-23 13:08:14,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 13:08:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 7958 transitions. [2022-07-23 13:08:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-23 13:08:14,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:08:14,054 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:08:14,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-23 13:08:14,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:08:14,266 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:08:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:08:14,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1934666287, now seen corresponding path program 4 times [2022-07-23 13:08:14,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:08:14,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330566507] [2022-07-23 13:08:14,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 13:08:14,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:08:14,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:08:14,269 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:08:14,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-23 13:08:14,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 13:08:14,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:08:14,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 13:08:14,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:08:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:08:14,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:08:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:08:16,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:08:16,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330566507] [2022-07-23 13:08:16,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330566507] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:08:16,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:08:16,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-23 13:08:16,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682200408] [2022-07-23 13:08:16,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 13:08:16,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-23 13:08:16,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:08:16,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-23 13:08:16,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-07-23 13:08:16,045 INFO L87 Difference]: Start difference. First operand 5405 states and 7958 transitions. Second operand has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 13:08:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:08:26,533 INFO L93 Difference]: Finished difference Result 5485 states and 8175 transitions. [2022-07-23 13:08:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-23 13:08:26,534 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 97 [2022-07-23 13:08:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:08:26,540 INFO L225 Difference]: With dead ends: 5485 [2022-07-23 13:08:26,541 INFO L226 Difference]: Without dead ends: 5481 [2022-07-23 13:08:26,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2022-07-23 13:08:26,543 INFO L413 NwaCegarLoop]: 2129 mSDtfsCounter, 406 mSDsluCounter, 48856 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 50985 SdHoareTripleChecker+Invalid, 3467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-23 13:08:26,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 50985 Invalid, 3467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-23 13:08:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2022-07-23 13:08:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5439. [2022-07-23 13:08:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 4550 states have (on average 1.7375824175824175) internal successors, (7906), 5392 states have internal predecessors, (7906), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-23 13:08:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 8004 transitions. [2022-07-23 13:08:26,584 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 8004 transitions. Word has length 97 [2022-07-23 13:08:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:08:26,585 INFO L495 AbstractCegarLoop]: Abstraction has 5439 states and 8004 transitions. [2022-07-23 13:08:26,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 13:08:26,585 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 8004 transitions. [2022-07-23 13:08:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-23 13:08:26,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:08:26,586 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:08:26,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-07-23 13:08:26,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:08:26,799 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:08:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:08:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1997795441, now seen corresponding path program 5 times [2022-07-23 13:08:26,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:08:26,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822432045] [2022-07-23 13:08:26,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 13:08:26,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:08:26,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:08:26,802 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:08:26,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-23 13:08:28,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-23 13:08:28,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:08:28,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-23 13:08:28,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:08:28,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:08:28,361 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 13:08:28,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 13:08:28,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 13:08:28,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-23 13:08:29,603 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 13:08:29,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-23 13:08:29,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-23 13:08:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-23 13:08:29,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:08:29,853 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2712 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_2712) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-23 13:08:29,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:08:29,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822432045] [2022-07-23 13:08:29,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822432045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:08:29,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [483036198] [2022-07-23 13:08:29,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 13:08:29,855 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 13:08:29,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 13:08:29,857 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 13:08:29,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-23 13:09:55,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-23 13:09:55,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:09:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-23 13:09:55,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:09:55,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:09:55,482 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 13:09:55,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 13:09:55,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 13:09:55,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-23 13:09:56,523 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 13:09:56,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-23 13:09:56,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-23 13:09:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-23 13:09:56,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:09:56,731 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3175 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3175) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-23 13:09:56,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [483036198] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:09:56,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 13:09:56,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-23 13:09:56,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078410759] [2022-07-23 13:09:56,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 13:09:56,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 13:09:56,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 13:09:56,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 13:09:56,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=10, NotChecked=38, Total=156 [2022-07-23 13:09:56,734 INFO L87 Difference]: Start difference. First operand 5439 states and 8004 transitions. Second operand has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 13:10:01,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:10:01,242 INFO L93 Difference]: Finished difference Result 7994 states and 12060 transitions. [2022-07-23 13:10:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 13:10:01,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-07-23 13:10:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:10:01,254 INFO L225 Difference]: With dead ends: 7994 [2022-07-23 13:10:01,254 INFO L226 Difference]: Without dead ends: 7990 [2022-07-23 13:10:01,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 143 SyntacticMatches, 90 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=43, Invalid=109, Unknown=12, NotChecked=46, Total=210 [2022-07-23 13:10:01,255 INFO L413 NwaCegarLoop]: 1369 mSDtfsCounter, 1592 mSDsluCounter, 6460 mSDsCounter, 0 mSdLazyCounter, 3531 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1601 SdHoareTripleChecker+Valid, 7829 SdHoareTripleChecker+Invalid, 8322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4779 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-23 13:10:01,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1601 Valid, 7829 Invalid, 8322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3531 Invalid, 0 Unknown, 4779 Unchecked, 4.4s Time] [2022-07-23 13:10:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2022-07-23 13:10:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 5487. [2022-07-23 13:10:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 4598 states have (on average 1.729447585906916) internal successors, (7952), 5439 states have internal predecessors, (7952), 46 states have call successors, (46), 5 states have call predecessors, (46), 6 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-23 13:10:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 8050 transitions. [2022-07-23 13:10:01,312 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 8050 transitions. Word has length 119 [2022-07-23 13:10:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:10:01,313 INFO L495 AbstractCegarLoop]: Abstraction has 5487 states and 8050 transitions. [2022-07-23 13:10:01,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 13:10:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 8050 transitions. [2022-07-23 13:10:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-23 13:10:01,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:10:01,314 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:10:01,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-07-23 13:10:01,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-23 13:10:01,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 13:10:01,740 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1190 more)] === [2022-07-23 13:10:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:10:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1997795440, now seen corresponding path program 1 times [2022-07-23 13:10:01,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 13:10:01,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988082888] [2022-07-23 13:10:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:10:01,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 13:10:01,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 13:10:01,742 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 13:10:01,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-23 13:10:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:10:02,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-23 13:10:02,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:10:02,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:10:02,670 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 13:10:02,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 11 [2022-07-23 13:10:02,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 13:10:02,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 13:10:02,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 13:10:02,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-23 13:10:02,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-07-23 13:10:02,819 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3552 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3552) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_3551 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3551))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-23 13:10:02,827 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3554 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3554))) (exists ((v_ArrVal_3553 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3553)))) is different from true [2022-07-23 13:10:02,867 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3557 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3557) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3558 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3558))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-23 13:10:02,875 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3559 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3559))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3560 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3560)))) is different from true [2022-07-23 13:10:02,966 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3567 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3567))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3568 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3568)))) is different from true [2022-07-23 13:10:02,995 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3572 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3572))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3571 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3571)))) is different from true [2022-07-23 13:10:03,022 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3576 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3576))) (exists ((v_ArrVal_3575 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3575)))) is different from true [2022-07-23 13:10:03,049 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3580 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3580))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3579 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3579) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 13:10:03,116 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3588 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3588))) (exists ((v_ArrVal_3587 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3587)))) is different from true [2022-07-23 13:10:03,144 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3591 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3591) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3592 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3592)))) is different from true [2022-07-23 13:10:03,152 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3594 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3594) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3593 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3593) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 13:10:03,160 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3595 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3595))) (exists ((v_ArrVal_3596 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3596) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 13:10:03,208 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3602 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3602))) (exists ((v_ArrVal_3601 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3601))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-23 13:10:03,216 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3604 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3604) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3603 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3603) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 13:10:03,224 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3605 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3605) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3606 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3606)))) is different from true [2022-07-23 13:10:03,232 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3608 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3608) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3607 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3607) |c_#memory_$Pointer$.base|))) is different from true [2022-07-23 13:10:03,262 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3611 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3611))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3612 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3612) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 13:10:03,289 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3615 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3615))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3616 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3616) |c_#memory_$Pointer$.base|))) is different from true [2022-07-23 13:10:03,316 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3620 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3620) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3619 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3619)))) is different from true [2022-07-23 13:10:03,325 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3621 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3621))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3622 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3622)))) is different from true [2022-07-23 13:10:03,332 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3623 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3623) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3624 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3624)))) is different from true [2022-07-23 13:10:03,360 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3627 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3627))) (exists ((v_ArrVal_3628 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3628)))) is different from true [2022-07-23 13:10:03,389 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3632 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3632))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3631 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3631) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-23 13:10:03,476 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 13:10:03,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-07-23 13:10:03,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-23 13:10:03,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-23 13:10:03,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-07-23 13:10:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 210 trivial. 759 not checked. [2022-07-23 13:10:03,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:10:04,237 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3730 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3729 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3729) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3730) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))) (forall ((v_ArrVal_3729 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3729) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse1) (bvadd .cse1 (_ bv20 32)))))) is different from false [2022-07-23 13:10:04,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 13:10:04,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988082888] [2022-07-23 13:10:04,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988082888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:10:04,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1183852971] [2022-07-23 13:10:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:10:04,244 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 13:10:04,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 13:10:04,245 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 13:10:04,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process