./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test13.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c 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/ldv-memsafety/memleaks_test13.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 e403b28035008257649d82a96310933a0e656461d578ec0892b41718c92e86af --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:51:07,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:51:07,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:51:07,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:51:07,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:51:07,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:51:07,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:51:07,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:51:07,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:51:07,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:51:07,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:51:07,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:51:07,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:51:07,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:51:07,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:51:07,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:51:07,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:51:07,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:51:07,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:51:07,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:51:07,815 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:51:07,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:51:07,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:51:07,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:51:07,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:51:07,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:51:07,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:51:07,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:51:07,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:51:07,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:51:07,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:51:07,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:51:07,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:51:07,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:51:07,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:51:07,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:51:07,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:51:07,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:51:07,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:51:07,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:51:07,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:51:07,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:51:07,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:51:07,852 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:51:07,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:51:07,856 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:51:07,856 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:51:07,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:51:07,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:51:07,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:51:07,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:51:07,858 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:51:07,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:51:07,858 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:51:07,859 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:51:07,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:51:07,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:51:07,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:51:07,859 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:51:07,859 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:51:07,859 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:51:07,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:51:07,860 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:51:07,860 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:51:07,860 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:51:07,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:51:07,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:51:07,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:51:07,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:51:07,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:51:07,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:51:07,861 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:51:07,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:51:07,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e403b28035008257649d82a96310933a0e656461d578ec0892b41718c92e86af [2022-07-12 18:51:08,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:51:08,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:51:08,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:51:08,057 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:51:08,058 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:51:08,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test13.i [2022-07-12 18:51:08,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/093adfd48/d642fad575ab4a3584f44d7c83259b18/FLAG0ec7c1329 [2022-07-12 18:51:08,519 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:51:08,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test13.i [2022-07-12 18:51:08,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/093adfd48/d642fad575ab4a3584f44d7c83259b18/FLAG0ec7c1329 [2022-07-12 18:51:08,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/093adfd48/d642fad575ab4a3584f44d7c83259b18 [2022-07-12 18:51:08,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:51:08,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:51:08,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:51:08,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:51:08,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:51:08,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:51:08" (1/1) ... [2022-07-12 18:51:08,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23521a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:08, skipping insertion in model container [2022-07-12 18:51:08,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:51:08" (1/1) ... [2022-07-12 18:51:08,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:51:08,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:51:08,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:51:08,927 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) [2022-07-12 18:51:08,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34aa6f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:08, skipping insertion in model container [2022-07-12 18:51:08,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:51:08,929 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 18:51:08,931 INFO L158 Benchmark]: Toolchain (without parser) took 383.14ms. Allocated memory is still 123.7MB. Free memory was 89.7MB in the beginning and 93.9MB in the end (delta: -4.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 18:51:08,932 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 83.9MB. Free memory is still 43.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:51:08,933 INFO L158 Benchmark]: CACSL2BoogieTranslator took 380.31ms. Allocated memory is still 123.7MB. Free memory was 89.5MB in the beginning and 93.9MB in the end (delta: -4.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 18:51:08,934 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 83.9MB. Free memory is still 43.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 380.31ms. Allocated memory is still 123.7MB. Free memory was 89.5MB in the beginning and 93.9MB in the end (delta: -4.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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/ldv-memsafety/memleaks_test13.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 e403b28035008257649d82a96310933a0e656461d578ec0892b41718c92e86af --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:51:10,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:51:10,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:51:10,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:51:10,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:51:10,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:51:10,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:51:10,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:51:10,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:51:10,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:51:10,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:51:10,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:51:10,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:51:10,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:51:10,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:51:10,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:51:10,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:51:10,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:51:10,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:51:10,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:51:10,685 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:51:10,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:51:10,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:51:10,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:51:10,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:51:10,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:51:10,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:51:10,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:51:10,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:51:10,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:51:10,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:51:10,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:51:10,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:51:10,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:51:10,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:51:10,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:51:10,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:51:10,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:51:10,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:51:10,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:51:10,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:51:10,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:51:10,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 18:51:10,730 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:51:10,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:51:10,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:51:10,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:51:10,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:51:10,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:51:10,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:51:10,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:51:10,733 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:51:10,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:51:10,734 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:51:10,734 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:51:10,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:51:10,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:51:10,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:51:10,735 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:51:10,735 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:51:10,735 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:51:10,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:51:10,735 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:51:10,735 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:51:10,736 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:51:10,736 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:51:10,736 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:51:10,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:51:10,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:51:10,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:51:10,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:51:10,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:51:10,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:51:10,737 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:51:10,737 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:51:10,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:51:10,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e403b28035008257649d82a96310933a0e656461d578ec0892b41718c92e86af [2022-07-12 18:51:10,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:51:11,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:51:11,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:51:11,008 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:51:11,009 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:51:11,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test13.i [2022-07-12 18:51:11,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cf051a0f/7938d88cc78c40278a8ccfec965a3aed/FLAGc1df143f4 [2022-07-12 18:51:11,463 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:51:11,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test13.i [2022-07-12 18:51:11,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cf051a0f/7938d88cc78c40278a8ccfec965a3aed/FLAGc1df143f4 [2022-07-12 18:51:11,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cf051a0f/7938d88cc78c40278a8ccfec965a3aed [2022-07-12 18:51:11,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:51:11,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:51:11,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:51:11,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:51:11,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:51:11,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:51:11" (1/1) ... [2022-07-12 18:51:11,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9285ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:11, skipping insertion in model container [2022-07-12 18:51:11,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:51:11" (1/1) ... [2022-07-12 18:51:11,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:51:11,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:51:12,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:51:12,229 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:51:12,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:51:12,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:51:12,302 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:51:12,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:51:12,393 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:51:12,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12 WrapperNode [2022-07-12 18:51:12,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:51:12,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:51:12,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:51:12,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:51:12,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12" (1/1) ... [2022-07-12 18:51:12,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12" (1/1) ... [2022-07-12 18:51:12,438 INFO L137 Inliner]: procedures = 167, calls = 80, calls flagged for inlining = 21, calls inlined = 6, statements flattened = 57 [2022-07-12 18:51:12,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:51:12,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:51:12,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:51:12,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:51:12,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12" (1/1) ... [2022-07-12 18:51:12,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12" (1/1) ... [2022-07-12 18:51:12,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12" (1/1) ... [2022-07-12 18:51:12,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12" (1/1) ... [2022-07-12 18:51:12,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12" (1/1) ... [2022-07-12 18:51:12,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12" (1/1) ... [2022-07-12 18:51:12,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12" (1/1) ... [2022-07-12 18:51:12,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:51:12,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:51:12,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:51:12,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:51:12,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12" (1/1) ... [2022-07-12 18:51:12,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:51:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:51:12,512 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) [2022-07-12 18:51:12,514 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 [2022-07-12 18:51:12,582 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2022-07-12 18:51:12,583 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2022-07-12 18:51:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-07-12 18:51:12,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-07-12 18:51:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-12 18:51:12,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-12 18:51:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2022-07-12 18:51:12,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2022-07-12 18:51:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:51:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:51:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:51:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:51:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:51:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:51:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2022-07-12 18:51:12,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2022-07-12 18:51:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:51:12,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:51:12,709 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:51:12,711 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:51:13,015 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:51:13,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:51:13,026 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 18:51:13,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:51:13 BoogieIcfgContainer [2022-07-12 18:51:13,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:51:13,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:51:13,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:51:13,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:51:13,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:51:11" (1/3) ... [2022-07-12 18:51:13,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81134aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:51:13, skipping insertion in model container [2022-07-12 18:51:13,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:51:12" (2/3) ... [2022-07-12 18:51:13,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81134aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:51:13, skipping insertion in model container [2022-07-12 18:51:13,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:51:13" (3/3) ... [2022-07-12 18:51:13,035 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test13.i [2022-07-12 18:51:13,044 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:51:13,044 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-07-12 18:51:13,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:51:13,078 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@78972c39, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6edb1820 [2022-07-12 18:51:13,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-07-12 18:51:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 45 states have (on average 1.8) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:51:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:51:13,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:13,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:13,086 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:13,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2002543009, now seen corresponding path program 1 times [2022-07-12 18:51:13,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:13,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395387758] [2022-07-12 18:51:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:13,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:13,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:13,100 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) [2022-07-12 18:51:13,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 18:51:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:13,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:51:13,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:13,299 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:51:13,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-12 18:51:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:13,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:13,340 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:13,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395387758] [2022-07-12 18:51:13,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395387758] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:13,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:13,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:51:13,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830864613] [2022-07-12 18:51:13,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:13,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:51:13,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:13,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:51:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:51:13,364 INFO L87 Difference]: Start difference. First operand has 88 states, 45 states have (on average 1.8) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:13,706 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2022-07-12 18:51:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:51:13,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-12 18:51:13,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:13,713 INFO L225 Difference]: With dead ends: 129 [2022-07-12 18:51:13,713 INFO L226 Difference]: Without dead ends: 125 [2022-07-12 18:51:13,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:51:13,717 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 170 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:13,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 162 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 224 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-07-12 18:51:13,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-12 18:51:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2022-07-12 18:51:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 74 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:51:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-07-12 18:51:13,741 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 12 [2022-07-12 18:51:13,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:13,742 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-07-12 18:51:13,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-07-12 18:51:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:51:13,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:13,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:13,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:13,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:13,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:13,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2002543010, now seen corresponding path program 1 times [2022-07-12 18:51:13,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:13,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735793224] [2022-07-12 18:51:13,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:13,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:13,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:13,953 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) [2022-07-12 18:51:13,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 18:51:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:14,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 18:51:14,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:51:16,144 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 [2022-07-12 18:51:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:16,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:16,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:16,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735793224] [2022-07-12 18:51:16,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735793224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:16,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:16,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:51:16,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81346324] [2022-07-12 18:51:16,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:16,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:51:16,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:51:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2022-07-12 18:51:16,231 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:22,690 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-07-12 18:51:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:51:22,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-12 18:51:22,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:22,693 INFO L225 Difference]: With dead ends: 130 [2022-07-12 18:51:22,693 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 18:51:22,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=64, Invalid=142, Unknown=4, NotChecked=0, Total=210 [2022-07-12 18:51:22,694 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 190 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:22,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 142 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 247 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-07-12 18:51:22,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 18:51:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2022-07-12 18:51:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 72 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:51:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-07-12 18:51:22,701 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 12 [2022-07-12 18:51:22,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:22,702 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-07-12 18:51:22,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:22,703 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-07-12 18:51:22,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:51:22,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:22,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:22,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:22,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:22,904 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:22,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash 663113707, now seen corresponding path program 1 times [2022-07-12 18:51:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:22,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704967652] [2022-07-12 18:51:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:22,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:22,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:22,908 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) [2022-07-12 18:51:22,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 18:51:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:22,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:51:22,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:23,015 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 15 treesize of output 7 [2022-07-12 18:51:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:23,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:23,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:23,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704967652] [2022-07-12 18:51:23,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704967652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:23,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:23,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:51:23,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535725466] [2022-07-12 18:51:23,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:23,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:51:23,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:51:23,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:51:23,057 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:23,411 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2022-07-12 18:51:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:51:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-12 18:51:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:23,412 INFO L225 Difference]: With dead ends: 115 [2022-07-12 18:51:23,412 INFO L226 Difference]: Without dead ends: 115 [2022-07-12 18:51:23,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:51:23,413 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:23,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 350 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:51:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-12 18:51:23,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2022-07-12 18:51:23,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 71 states have internal predecessors, (73), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:51:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-07-12 18:51:23,418 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 15 [2022-07-12 18:51:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:23,419 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-07-12 18:51:23,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-07-12 18:51:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:51:23,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:23,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:23,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:23,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:23,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:23,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:23,621 INFO L85 PathProgramCache]: Analyzing trace with hash 663113708, now seen corresponding path program 1 times [2022-07-12 18:51:23,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:23,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521112301] [2022-07-12 18:51:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:23,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:23,628 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) [2022-07-12 18:51:23,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 18:51:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:23,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:51:23,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:51:25,831 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 [2022-07-12 18:51:25,947 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 15 treesize of output 7 [2022-07-12 18:51:25,953 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 15 treesize of output 7 [2022-07-12 18:51:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:26,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:26,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:26,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521112301] [2022-07-12 18:51:26,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521112301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:26,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:26,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:51:26,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886706150] [2022-07-12 18:51:26,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:26,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:51:26,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:26,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:51:26,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=89, Unknown=1, NotChecked=0, Total=110 [2022-07-12 18:51:26,020 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:30,926 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-07-12 18:51:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:51:30,926 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-12 18:51:30,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:30,927 INFO L225 Difference]: With dead ends: 118 [2022-07-12 18:51:30,927 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 18:51:30,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=95, Invalid=322, Unknown=3, NotChecked=0, Total=420 [2022-07-12 18:51:30,928 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 90 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:30,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 341 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 420 Invalid, 0 Unknown, 90 Unchecked, 0.5s Time] [2022-07-12 18:51:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 18:51:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 80. [2022-07-12 18:51:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 70 states have internal predecessors, (72), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:51:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-07-12 18:51:30,933 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 15 [2022-07-12 18:51:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:30,933 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-07-12 18:51:30,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-07-12 18:51:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:51:30,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:30,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:30,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:31,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:31,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:31,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:31,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1949585109, now seen corresponding path program 1 times [2022-07-12 18:51:31,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:31,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974908607] [2022-07-12 18:51:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:31,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:31,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:31,137 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) [2022-07-12 18:51:31,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 18:51:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:31,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:51:31,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:31,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:31,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:31,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974908607] [2022-07-12 18:51:31,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974908607] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:31,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:31,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:51:31,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280441041] [2022-07-12 18:51:31,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:31,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:51:31,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:31,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:51:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:51:31,227 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-12 18:51:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:31,244 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2022-07-12 18:51:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:51:31,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 13 [2022-07-12 18:51:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:31,246 INFO L225 Difference]: With dead ends: 110 [2022-07-12 18:51:31,246 INFO L226 Difference]: Without dead ends: 110 [2022-07-12 18:51:31,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:51:31,251 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 24 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:31,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 397 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:51:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-12 18:51:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 84. [2022-07-12 18:51:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 73 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:51:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-07-12 18:51:31,264 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 13 [2022-07-12 18:51:31,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:31,264 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-07-12 18:51:31,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-12 18:51:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-07-12 18:51:31,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:51:31,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:31,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:31,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:31,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:31,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:31,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:31,472 INFO L85 PathProgramCache]: Analyzing trace with hash 142130646, now seen corresponding path program 1 times [2022-07-12 18:51:31,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:31,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655968350] [2022-07-12 18:51:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:31,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:31,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:31,474 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) [2022-07-12 18:51:31,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 18:51:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:31,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 18:51:31,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:31,648 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 15 treesize of output 7 [2022-07-12 18:51:31,653 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 15 treesize of output 7 [2022-07-12 18:51:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:31,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:31,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:31,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655968350] [2022-07-12 18:51:31,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655968350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:31,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:31,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:51:31,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599088489] [2022-07-12 18:51:31,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:51:31,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:51:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:51:31,693 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-07-12 18:51:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:32,011 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2022-07-12 18:51:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:51:32,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-07-12 18:51:32,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:32,012 INFO L225 Difference]: With dead ends: 109 [2022-07-12 18:51:32,012 INFO L226 Difference]: Without dead ends: 109 [2022-07-12 18:51:32,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:51:32,013 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 35 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:32,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 242 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:51:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-12 18:51:32,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2022-07-12 18:51:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 78 states have internal predecessors, (82), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:51:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-07-12 18:51:32,017 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 13 [2022-07-12 18:51:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:32,017 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-07-12 18:51:32,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-07-12 18:51:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-07-12 18:51:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:51:32,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:32,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:32,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-12 18:51:32,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:32,218 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:32,219 INFO L85 PathProgramCache]: Analyzing trace with hash 142130645, now seen corresponding path program 1 times [2022-07-12 18:51:32,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:32,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366371387] [2022-07-12 18:51:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:32,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:32,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:32,221 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) [2022-07-12 18:51:32,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 18:51:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:32,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:51:32,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:32,334 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 15 treesize of output 7 [2022-07-12 18:51:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:32,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:32,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:32,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366371387] [2022-07-12 18:51:32,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366371387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:32,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:32,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:51:32,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986424677] [2022-07-12 18:51:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:32,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:51:32,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:51:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:51:32,356 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-07-12 18:51:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:32,600 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2022-07-12 18:51:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:51:32,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-07-12 18:51:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:32,601 INFO L225 Difference]: With dead ends: 104 [2022-07-12 18:51:32,601 INFO L226 Difference]: Without dead ends: 104 [2022-07-12 18:51:32,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:51:32,601 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 38 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:32,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 189 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:51:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-12 18:51:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2022-07-12 18:51:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.528301886792453) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:51:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-07-12 18:51:32,606 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 13 [2022-07-12 18:51:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:32,606 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-07-12 18:51:32,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-07-12 18:51:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-07-12 18:51:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:51:32,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:32,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:32,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:32,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:32,813 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __ldv_list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:32,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:32,814 INFO L85 PathProgramCache]: Analyzing trace with hash -918311498, now seen corresponding path program 1 times [2022-07-12 18:51:32,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:32,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494304958] [2022-07-12 18:51:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:32,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:32,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:32,818 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) [2022-07-12 18:51:32,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 18:51:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:32,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:51:32,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:32,893 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 [2022-07-12 18:51:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:32,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:32,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:32,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494304958] [2022-07-12 18:51:32,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494304958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:32,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:32,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:51:32,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794994841] [2022-07-12 18:51:32,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:32,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:51:32,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:32,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:51:32,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:51:32,973 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:33,375 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-07-12 18:51:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:51:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-12 18:51:33,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:33,376 INFO L225 Difference]: With dead ends: 127 [2022-07-12 18:51:33,376 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 18:51:33,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:51:33,378 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 47 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:33,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 419 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:51:33,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 18:51:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 103. [2022-07-12 18:51:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.492063492063492) internal successors, (94), 88 states have internal predecessors, (94), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:51:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2022-07-12 18:51:33,396 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 16 [2022-07-12 18:51:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:33,396 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2022-07-12 18:51:33,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2022-07-12 18:51:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:51:33,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:33,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:33,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:33,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:33,599 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __ldv_list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:33,600 INFO L85 PathProgramCache]: Analyzing trace with hash -918311497, now seen corresponding path program 1 times [2022-07-12 18:51:33,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:33,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831427664] [2022-07-12 18:51:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:33,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:33,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:33,602 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) [2022-07-12 18:51:33,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 18:51:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:33,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:51:33,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:33,672 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 [2022-07-12 18:51:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:33,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:33,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:33,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831427664] [2022-07-12 18:51:33,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831427664] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:33,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:33,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:51:33,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576056313] [2022-07-12 18:51:33,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:33,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:51:33,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:51:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:51:33,806 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:34,170 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-07-12 18:51:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:51:34,170 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-12 18:51:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:34,171 INFO L225 Difference]: With dead ends: 130 [2022-07-12 18:51:34,171 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 18:51:34,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:51:34,171 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 47 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:34,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 503 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:51:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 18:51:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 103. [2022-07-12 18:51:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.4603174603174602) internal successors, (92), 88 states have internal predecessors, (92), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:51:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-07-12 18:51:34,174 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 16 [2022-07-12 18:51:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:34,175 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-07-12 18:51:34,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-07-12 18:51:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:51:34,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:34,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:34,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:34,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:34,376 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __ldv_list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:34,376 INFO L85 PathProgramCache]: Analyzing trace with hash -789228779, now seen corresponding path program 1 times [2022-07-12 18:51:34,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:34,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070041950] [2022-07-12 18:51:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:34,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:34,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:34,378 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) [2022-07-12 18:51:34,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 18:51:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:34,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:51:34,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:34,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:34,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:34,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070041950] [2022-07-12 18:51:34,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070041950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:34,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:34,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:51:34,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664688930] [2022-07-12 18:51:34,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:34,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:51:34,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:34,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:51:34,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:51:34,464 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:34,477 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-07-12 18:51:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:51:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-12 18:51:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:34,479 INFO L225 Difference]: With dead ends: 91 [2022-07-12 18:51:34,479 INFO L226 Difference]: Without dead ends: 91 [2022-07-12 18:51:34,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:51:34,479 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 10 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:34,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 308 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:51:34,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-12 18:51:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-07-12 18:51:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 74 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:51:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-07-12 18:51:34,486 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 16 [2022-07-12 18:51:34,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:34,486 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-07-12 18:51:34,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-07-12 18:51:34,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:51:34,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:34,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:34,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-07-12 18:51:34,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:34,698 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __ldv_list_addErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2029051719, now seen corresponding path program 1 times [2022-07-12 18:51:34,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:34,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710300098] [2022-07-12 18:51:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:34,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:34,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:34,700 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) [2022-07-12 18:51:34,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 18:51:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:34,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:51:34,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:34,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:34,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:34,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710300098] [2022-07-12 18:51:34,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710300098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:34,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:34,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:51:34,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399668517] [2022-07-12 18:51:34,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:34,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:51:34,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:34,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:51:34,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:51:34,791 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:34,900 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-07-12 18:51:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:51:34,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-12 18:51:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:34,902 INFO L225 Difference]: With dead ends: 85 [2022-07-12 18:51:34,902 INFO L226 Difference]: Without dead ends: 85 [2022-07-12 18:51:34,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:51:34,902 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 12 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:34,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 197 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:51:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-12 18:51:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-12 18:51:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 73 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:51:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-12 18:51:34,904 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 18 [2022-07-12 18:51:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:34,905 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-12 18:51:34,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-12 18:51:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:51:34,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:34,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:34,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:35,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:35,112 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __ldv_list_addErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2029051718, now seen corresponding path program 1 times [2022-07-12 18:51:35,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:35,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021899330] [2022-07-12 18:51:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:35,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:35,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:35,115 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) [2022-07-12 18:51:35,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 18:51:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:35,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:51:35,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:35,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:35,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:35,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021899330] [2022-07-12 18:51:35,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021899330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:35,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:35,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:51:35,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704405663] [2022-07-12 18:51:35,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:35,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:51:35,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:35,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:51:35,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:51:35,272 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:35,502 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2022-07-12 18:51:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:51:35,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-12 18:51:35,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:35,503 INFO L225 Difference]: With dead ends: 84 [2022-07-12 18:51:35,503 INFO L226 Difference]: Without dead ends: 84 [2022-07-12 18:51:35,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:51:35,504 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 81 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:35,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 273 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:51:35,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-12 18:51:35,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-12 18:51:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 72 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:51:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-07-12 18:51:35,506 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 18 [2022-07-12 18:51:35,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:35,506 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-07-12 18:51:35,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-07-12 18:51:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 18:51:35,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:35,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:35,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:35,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:35,708 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:35,708 INFO L85 PathProgramCache]: Analyzing trace with hash -781083149, now seen corresponding path program 1 times [2022-07-12 18:51:35,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:35,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435365960] [2022-07-12 18:51:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:35,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:35,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:35,710 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) [2022-07-12 18:51:35,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 18:51:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:35,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:51:35,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:35,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:35,853 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:35,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435365960] [2022-07-12 18:51:35,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435365960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:35,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:35,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:51:35,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285811638] [2022-07-12 18:51:35,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:35,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:51:35,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:51:35,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:51:35,854 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:36,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:36,119 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-07-12 18:51:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:51:36,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-07-12 18:51:36,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:36,120 INFO L225 Difference]: With dead ends: 121 [2022-07-12 18:51:36,120 INFO L226 Difference]: Without dead ends: 121 [2022-07-12 18:51:36,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:51:36,121 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 94 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:36,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 139 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:51:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-12 18:51:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2022-07-12 18:51:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 79 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-12 18:51:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-07-12 18:51:36,123 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 19 [2022-07-12 18:51:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:36,124 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-07-12 18:51:36,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-07-12 18:51:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 18:51:36,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:36,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:51:36,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:36,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:36,330 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:36,331 INFO L85 PathProgramCache]: Analyzing trace with hash -781083148, now seen corresponding path program 1 times [2022-07-12 18:51:36,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:36,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366075124] [2022-07-12 18:51:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:36,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:36,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:36,332 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) [2022-07-12 18:51:36,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 18:51:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:36,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 18:51:36,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:36,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:36,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:36,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366075124] [2022-07-12 18:51:36,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366075124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:36,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:36,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:51:36,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545129688] [2022-07-12 18:51:36,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:36,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:51:36,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:36,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:51:36,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:51:36,488 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:36,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:36,694 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2022-07-12 18:51:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:51:36,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-07-12 18:51:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:36,695 INFO L225 Difference]: With dead ends: 102 [2022-07-12 18:51:36,695 INFO L226 Difference]: Without dead ends: 102 [2022-07-12 18:51:36,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:51:36,696 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 22 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:36,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 238 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:51:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-12 18:51:36,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2022-07-12 18:51:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 64 states have (on average 1.375) internal successors, (88), 85 states have internal predecessors, (88), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-12 18:51:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2022-07-12 18:51:36,698 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 19 [2022-07-12 18:51:36,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:36,698 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2022-07-12 18:51:36,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:51:36,698 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2022-07-12 18:51:36,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:51:36,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:36,699 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] [2022-07-12 18:51:36,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:36,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:36,905 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:36,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:36,906 INFO L85 PathProgramCache]: Analyzing trace with hash -151348929, now seen corresponding path program 1 times [2022-07-12 18:51:36,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:36,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144301728] [2022-07-12 18:51:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:36,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:36,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:36,908 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) [2022-07-12 18:51:36,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 18:51:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:36,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:51:36,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:37,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:37,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:37,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144301728] [2022-07-12 18:51:37,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144301728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:37,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:37,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:51:37,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283064861] [2022-07-12 18:51:37,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:37,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:51:37,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:37,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:51:37,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:51:37,005 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:51:37,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:37,117 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-07-12 18:51:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:51:37,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-12 18:51:37,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:37,118 INFO L225 Difference]: With dead ends: 101 [2022-07-12 18:51:37,118 INFO L226 Difference]: Without dead ends: 82 [2022-07-12 18:51:37,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:51:37,119 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 34 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:37,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 101 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:51:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-12 18:51:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-07-12 18:51:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.46) internal successors, (73), 70 states have internal predecessors, (73), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:51:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-07-12 18:51:37,122 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 24 [2022-07-12 18:51:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:37,122 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-07-12 18:51:37,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:51:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-07-12 18:51:37,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:51:37,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:37,123 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] [2022-07-12 18:51:37,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:37,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:37,330 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:37,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:37,331 INFO L85 PathProgramCache]: Analyzing trace with hash 345895671, now seen corresponding path program 1 times [2022-07-12 18:51:37,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:37,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033612829] [2022-07-12 18:51:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:37,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:37,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:37,333 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) [2022-07-12 18:51:37,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-12 18:51:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:37,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 18:51:37,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:37,419 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 [2022-07-12 18:51:37,656 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 11 treesize of output 7 [2022-07-12 18:51:37,660 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 11 treesize of output 7 [2022-07-12 18:51:37,769 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 15 treesize of output 7 [2022-07-12 18:51:37,772 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 17 treesize of output 9 [2022-07-12 18:51:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:37,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:37,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:37,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033612829] [2022-07-12 18:51:37,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033612829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:37,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:37,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 18:51:37,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319076336] [2022-07-12 18:51:37,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:37,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:51:37,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:37,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:51:37,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:51:37,820 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:38,080 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2022-07-12 18:51:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:51:38,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-07-12 18:51:38,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:38,081 INFO L225 Difference]: With dead ends: 105 [2022-07-12 18:51:38,081 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 18:51:38,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:51:38,081 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 42 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:38,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 394 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-07-12 18:51:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 18:51:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2022-07-12 18:51:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 70 states have internal predecessors, (73), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 18:51:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-07-12 18:51:38,084 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 27 [2022-07-12 18:51:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:38,084 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-07-12 18:51:38,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-07-12 18:51:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:51:38,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:38,084 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] [2022-07-12 18:51:38,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:38,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:38,291 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash 345895670, now seen corresponding path program 1 times [2022-07-12 18:51:38,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:38,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429440494] [2022-07-12 18:51:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:38,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:38,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:38,294 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) [2022-07-12 18:51:38,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 18:51:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:38,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:51:38,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:38,372 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 [2022-07-12 18:51:38,510 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 11 treesize of output 7 [2022-07-12 18:51:38,595 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 20 treesize of output 12 [2022-07-12 18:51:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:38,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:38,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:38,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429440494] [2022-07-12 18:51:38,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429440494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:38,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:38,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 18:51:38,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194062357] [2022-07-12 18:51:38,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:38,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:51:38,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:38,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:51:38,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:51:38,631 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:38,958 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2022-07-12 18:51:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:51:38,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-07-12 18:51:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:38,959 INFO L225 Difference]: With dead ends: 101 [2022-07-12 18:51:38,959 INFO L226 Difference]: Without dead ends: 101 [2022-07-12 18:51:38,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:51:38,960 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 45 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:38,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 380 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 236 Invalid, 0 Unknown, 216 Unchecked, 0.2s Time] [2022-07-12 18:51:38,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-12 18:51:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2022-07-12 18:51:38,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 71 states have internal predecessors, (75), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 18:51:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-07-12 18:51:38,962 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 27 [2022-07-12 18:51:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:38,962 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-07-12 18:51:38,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-07-12 18:51:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:51:38,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:38,962 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] [2022-07-12 18:51:38,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-12 18:51:39,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:39,169 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash -566103308, now seen corresponding path program 1 times [2022-07-12 18:51:39,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:39,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437084650] [2022-07-12 18:51:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:39,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:39,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:39,172 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) [2022-07-12 18:51:39,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-12 18:51:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:39,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:51:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:39,258 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 [2022-07-12 18:51:39,357 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 11 treesize of output 7 [2022-07-12 18:51:39,437 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 20 treesize of output 12 [2022-07-12 18:51:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:39,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:39,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:39,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437084650] [2022-07-12 18:51:39,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437084650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:39,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:39,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 18:51:39,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57185103] [2022-07-12 18:51:39,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:39,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:51:39,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:39,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:51:39,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:51:39,504 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:39,646 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-07-12 18:51:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:51:39,646 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-07-12 18:51:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:39,647 INFO L225 Difference]: With dead ends: 98 [2022-07-12 18:51:39,647 INFO L226 Difference]: Without dead ends: 98 [2022-07-12 18:51:39,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:51:39,647 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 80 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:39,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 221 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2022-07-12 18:51:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-12 18:51:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2022-07-12 18:51:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 78 states have internal predecessors, (88), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 18:51:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2022-07-12 18:51:39,650 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 32 [2022-07-12 18:51:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:39,650 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2022-07-12 18:51:39,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:39,650 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2022-07-12 18:51:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:51:39,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:39,650 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] [2022-07-12 18:51:39,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:39,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:39,858 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:39,858 INFO L85 PathProgramCache]: Analyzing trace with hash -566103307, now seen corresponding path program 1 times [2022-07-12 18:51:39,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:39,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971984655] [2022-07-12 18:51:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:39,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:39,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:39,860 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) [2022-07-12 18:51:39,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 18:51:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:39,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 18:51:39,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:39,954 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 [2022-07-12 18:51:40,102 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 11 treesize of output 7 [2022-07-12 18:51:40,107 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 11 treesize of output 7 [2022-07-12 18:51:40,219 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 15 treesize of output 7 [2022-07-12 18:51:40,222 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 17 treesize of output 9 [2022-07-12 18:51:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:40,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:40,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:40,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971984655] [2022-07-12 18:51:40,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971984655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:40,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:40,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-12 18:51:40,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582381362] [2022-07-12 18:51:40,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:40,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:51:40,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:40,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:51:40,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:51:40,326 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:40,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:40,700 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2022-07-12 18:51:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:51:40,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-07-12 18:51:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:40,701 INFO L225 Difference]: With dead ends: 104 [2022-07-12 18:51:40,701 INFO L226 Difference]: Without dead ends: 104 [2022-07-12 18:51:40,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:51:40,702 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 54 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:40,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 425 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 273 Invalid, 0 Unknown, 167 Unchecked, 0.3s Time] [2022-07-12 18:51:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-12 18:51:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2022-07-12 18:51:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 78 states have internal predecessors, (86), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 18:51:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-07-12 18:51:40,704 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 32 [2022-07-12 18:51:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:40,704 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-07-12 18:51:40,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-07-12 18:51:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:51:40,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:40,705 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] [2022-07-12 18:51:40,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:40,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:40,906 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:40,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:40,906 INFO L85 PathProgramCache]: Analyzing trace with hash -372722091, now seen corresponding path program 1 times [2022-07-12 18:51:40,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:40,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914999060] [2022-07-12 18:51:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:40,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:40,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:40,907 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) [2022-07-12 18:51:40,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-12 18:51:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:40,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 18:51:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:41,049 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:41,049 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 [2022-07-12 18:51:41,196 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 11 treesize of output 7 [2022-07-12 18:51:41,277 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 16 treesize of output 8 [2022-07-12 18:51:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:41,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:41,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:41,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914999060] [2022-07-12 18:51:41,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914999060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:41,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:41,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 18:51:41,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994456106] [2022-07-12 18:51:41,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:41,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:51:41,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:41,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:51:41,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:51:41,324 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:42,192 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2022-07-12 18:51:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:51:42,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-07-12 18:51:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:42,193 INFO L225 Difference]: With dead ends: 131 [2022-07-12 18:51:42,193 INFO L226 Difference]: Without dead ends: 131 [2022-07-12 18:51:42,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:51:42,194 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 186 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:42,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 147 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:51:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-12 18:51:42,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 85. [2022-07-12 18:51:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 72 states have internal predecessors, (78), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:51:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2022-07-12 18:51:42,196 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 33 [2022-07-12 18:51:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:42,197 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2022-07-12 18:51:42,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2022-07-12 18:51:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 18:51:42,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:42,197 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] [2022-07-12 18:51:42,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-07-12 18:51:42,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:42,428 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_list_delErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:42,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1552970525, now seen corresponding path program 1 times [2022-07-12 18:51:42,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:42,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986026147] [2022-07-12 18:51:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:42,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:42,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:42,430 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) [2022-07-12 18:51:42,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 18:51:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:42,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-12 18:51:42,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:42,624 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:42,625 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 14 treesize of output 14 [2022-07-12 18:51:42,677 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 7 treesize of output 3 [2022-07-12 18:51:42,873 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 11 treesize of output 7 [2022-07-12 18:51:42,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:51:42,940 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 21 treesize of output 20 [2022-07-12 18:51:42,950 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 11 treesize of output 7 [2022-07-12 18:51:42,977 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:51:42,978 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-07-12 18:51:43,181 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 43 treesize of output 35 [2022-07-12 18:51:43,243 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 32 treesize of output 20 [2022-07-12 18:51:43,466 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:51:43,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-07-12 18:51:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:43,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:43,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:43,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986026147] [2022-07-12 18:51:43,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986026147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:43,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:43,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 18:51:43,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128111586] [2022-07-12 18:51:43,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:43,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 18:51:43,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 18:51:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:51:43,520 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 22 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:44,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:44,063 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2022-07-12 18:51:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:51:44,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2022-07-12 18:51:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:44,064 INFO L225 Difference]: With dead ends: 88 [2022-07-12 18:51:44,064 INFO L226 Difference]: Without dead ends: 88 [2022-07-12 18:51:44,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:51:44,066 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 29 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:44,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 460 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 289 Invalid, 0 Unknown, 271 Unchecked, 0.3s Time] [2022-07-12 18:51:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-12 18:51:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2022-07-12 18:51:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.375) internal successors, (77), 72 states have internal predecessors, (77), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:51:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-07-12 18:51:44,072 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 35 [2022-07-12 18:51:44,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:44,072 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-07-12 18:51:44,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:44,072 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-07-12 18:51:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 18:51:44,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:44,073 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] [2022-07-12 18:51:44,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:44,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:44,281 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_list_delErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:44,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1552970526, now seen corresponding path program 1 times [2022-07-12 18:51:44,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:44,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698382032] [2022-07-12 18:51:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:44,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:44,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:44,283 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) [2022-07-12 18:51:44,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-12 18:51:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-12 18:51:44,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:44,538 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:44,538 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 14 treesize of output 14 [2022-07-12 18:51:44,603 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 7 treesize of output 3 [2022-07-12 18:51:44,611 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 7 treesize of output 3 [2022-07-12 18:51:44,894 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 11 treesize of output 7 [2022-07-12 18:51:44,901 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 11 treesize of output 7 [2022-07-12 18:51:44,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:51:44,992 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 21 treesize of output 20 [2022-07-12 18:51:45,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:51:45,001 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 21 treesize of output 20 [2022-07-12 18:51:45,048 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:51:45,049 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-07-12 18:51:45,089 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:51:45,089 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-07-12 18:51:45,417 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 58 treesize of output 46 [2022-07-12 18:51:45,421 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 54 treesize of output 42 [2022-07-12 18:51:45,815 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:51:45,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-07-12 18:51:45,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 15 [2022-07-12 18:51:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:45,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:45,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:45,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698382032] [2022-07-12 18:51:45,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698382032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:45,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:45,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 18:51:45,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550786119] [2022-07-12 18:51:45,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:45,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 18:51:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 18:51:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:51:45,923 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:48,980 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2022-07-12 18:51:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 18:51:48,982 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2022-07-12 18:51:48,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:48,982 INFO L225 Difference]: With dead ends: 87 [2022-07-12 18:51:48,983 INFO L226 Difference]: Without dead ends: 87 [2022-07-12 18:51:48,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 18:51:48,984 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 126 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:48,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 548 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-12 18:51:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-12 18:51:48,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-07-12 18:51:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 72 states have internal predecessors, (76), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:51:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-07-12 18:51:48,988 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 35 [2022-07-12 18:51:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:48,988 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-07-12 18:51:48,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-07-12 18:51:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 18:51:48,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:48,990 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] [2022-07-12 18:51:48,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-12 18:51:49,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:49,201 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_list_delErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:49,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash 897446074, now seen corresponding path program 1 times [2022-07-12 18:51:49,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:49,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067924256] [2022-07-12 18:51:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:49,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:49,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:49,203 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) [2022-07-12 18:51:49,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-12 18:51:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:49,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 18:51:49,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:49,403 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:49,403 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 14 treesize of output 14 [2022-07-12 18:51:49,593 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 [2022-07-12 18:51:49,657 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-12 18:51:49,657 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:51:49,669 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 11 treesize of output 7 [2022-07-12 18:51:49,856 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 34 treesize of output 22 [2022-07-12 18:51:50,035 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:51:50,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-07-12 18:51:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:50,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:50,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:50,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067924256] [2022-07-12 18:51:50,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067924256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:50,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:50,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 18:51:50,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705572751] [2022-07-12 18:51:50,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:50,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 18:51:50,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 18:51:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:51:50,090 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 22 states, 20 states have (on average 1.45) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:50,779 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2022-07-12 18:51:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:51:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-07-12 18:51:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:50,779 INFO L225 Difference]: With dead ends: 86 [2022-07-12 18:51:50,779 INFO L226 Difference]: Without dead ends: 86 [2022-07-12 18:51:50,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:51:50,780 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 41 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:50,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 374 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 243 Invalid, 0 Unknown, 254 Unchecked, 0.2s Time] [2022-07-12 18:51:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-12 18:51:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-07-12 18:51:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 72 states have internal predecessors, (75), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:51:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-07-12 18:51:50,782 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 36 [2022-07-12 18:51:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:50,782 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-07-12 18:51:50,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-07-12 18:51:50,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 18:51:50,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:50,783 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] [2022-07-12 18:51:50,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-12 18:51:50,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:50,983 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_list_delErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:50,983 INFO L85 PathProgramCache]: Analyzing trace with hash 897446075, now seen corresponding path program 1 times [2022-07-12 18:51:50,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:50,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867532624] [2022-07-12 18:51:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:50,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:50,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:50,986 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) [2022-07-12 18:51:50,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 18:51:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:51,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-12 18:51:51,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:51,167 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:51,167 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 14 treesize of output 14 [2022-07-12 18:51:51,379 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 [2022-07-12 18:51:51,390 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 [2022-07-12 18:51:51,466 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-07-12 18:51:51,466 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 44 treesize of output 44 [2022-07-12 18:51:51,483 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-12 18:51:51,484 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:51:52,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 43 [2022-07-12 18:51:52,062 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:51:52,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-07-12 18:51:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:52,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:52,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:52,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867532624] [2022-07-12 18:51:52,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867532624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:52,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:52,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-12 18:51:52,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909474286] [2022-07-12 18:51:52,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:52,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:51:52,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:52,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:51:52,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:51:52,138 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:54,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:54,246 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-07-12 18:51:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:51:54,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-07-12 18:51:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:54,247 INFO L225 Difference]: With dead ends: 86 [2022-07-12 18:51:54,247 INFO L226 Difference]: Without dead ends: 86 [2022-07-12 18:51:54,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 18:51:54,248 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 117 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:54,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 296 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 18:51:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-12 18:51:54,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-07-12 18:51:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 72 states have internal predecessors, (74), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:51:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-12 18:51:54,250 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 36 [2022-07-12 18:51:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:54,250 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-12 18:51:54,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:51:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-12 18:51:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 18:51:54,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:54,251 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] [2022-07-12 18:51:54,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:54,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:54,451 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2088327703, now seen corresponding path program 1 times [2022-07-12 18:51:54,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126422944] [2022-07-12 18:51:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:54,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:54,453 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) [2022-07-12 18:51:54,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 18:51:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:54,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:51:54,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:54,793 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 11 treesize of output 7 [2022-07-12 18:51:54,938 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 23 treesize of output 11 [2022-07-12 18:51:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:55,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:55,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:55,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126422944] [2022-07-12 18:51:55,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126422944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:55,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:55,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 18:51:55,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720092533] [2022-07-12 18:51:55,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:55,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:51:55,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:55,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:51:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:51:55,072 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:51:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:55,216 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-07-12 18:51:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:51:55,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-07-12 18:51:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:55,217 INFO L225 Difference]: With dead ends: 86 [2022-07-12 18:51:55,217 INFO L226 Difference]: Without dead ends: 86 [2022-07-12 18:51:55,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:51:55,217 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 63 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:55,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 446 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2022-07-12 18:51:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-12 18:51:55,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-07-12 18:51:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 72 states have internal predecessors, (73), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:51:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-07-12 18:51:55,219 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 41 [2022-07-12 18:51:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:55,219 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-07-12 18:51:55,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:51:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-07-12 18:51:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:51:55,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:55,220 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] [2022-07-12 18:51:55,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-12 18:51:55,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:55,420 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:55,421 INFO L85 PathProgramCache]: Analyzing trace with hash 769395034, now seen corresponding path program 1 times [2022-07-12 18:51:55,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:55,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736930018] [2022-07-12 18:51:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:55,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:55,422 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) [2022-07-12 18:51:55,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 18:51:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:55,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-12 18:51:55,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:55,679 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:51:55,679 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 20 treesize of output 27 [2022-07-12 18:51:55,749 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 7 treesize of output 3 [2022-07-12 18:51:55,967 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 11 treesize of output 7 [2022-07-12 18:51:56,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:51:56,026 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 21 treesize of output 20 [2022-07-12 18:51:56,037 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 11 treesize of output 7 [2022-07-12 18:51:56,060 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:51:56,060 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-07-12 18:51:56,279 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 43 treesize of output 35 [2022-07-12 18:51:56,386 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 30 treesize of output 18 [2022-07-12 18:51:56,724 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-07-12 18:51:56,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 20 [2022-07-12 18:51:56,771 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 14 treesize of output 16 [2022-07-12 18:51:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:56,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:56,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:56,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736930018] [2022-07-12 18:51:56,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736930018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:56,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:56,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-07-12 18:51:56,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440634345] [2022-07-12 18:51:56,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:56,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:51:56,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:51:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:51:56,805 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 26 states, 24 states have (on average 1.5) internal successors, (36), 21 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:51:57,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:57,028 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-07-12 18:51:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 18:51:57,029 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5) internal successors, (36), 21 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 44 [2022-07-12 18:51:57,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:57,029 INFO L225 Difference]: With dead ends: 104 [2022-07-12 18:51:57,029 INFO L226 Difference]: Without dead ends: 104 [2022-07-12 18:51:57,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:51:57,030 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 56 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:57,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 294 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 133 Invalid, 0 Unknown, 311 Unchecked, 0.1s Time] [2022-07-12 18:51:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-12 18:51:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2022-07-12 18:51:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 74 states have internal predecessors, (76), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:51:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-07-12 18:51:57,032 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 44 [2022-07-12 18:51:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:57,032 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-07-12 18:51:57,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5) internal successors, (36), 21 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:51:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-07-12 18:51:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:51:57,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:57,032 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] [2022-07-12 18:51:57,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-12 18:51:57,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:51:57,233 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:51:57,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:57,233 INFO L85 PathProgramCache]: Analyzing trace with hash 769395035, now seen corresponding path program 1 times [2022-07-12 18:51:57,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:57,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689078854] [2022-07-12 18:51:57,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:57,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:57,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:57,235 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) [2022-07-12 18:51:57,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-12 18:51:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:57,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-12 18:51:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:57,517 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:57,517 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 14 treesize of output 14 [2022-07-12 18:51:57,571 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 7 treesize of output 3 [2022-07-12 18:51:57,575 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 7 treesize of output 3 [2022-07-12 18:51:57,789 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 11 treesize of output 7 [2022-07-12 18:51:57,797 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 11 treesize of output 7 [2022-07-12 18:51:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:51:57,849 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 21 treesize of output 20 [2022-07-12 18:51:57,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:51:57,867 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 21 treesize of output 20 [2022-07-12 18:51:57,894 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:51:57,894 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-07-12 18:51:57,930 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:51:57,930 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-07-12 18:51:58,153 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 43 treesize of output 35 [2022-07-12 18:51:58,165 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 43 treesize of output 35 [2022-07-12 18:51:58,724 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:51:58,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 53 [2022-07-12 18:51:58,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 24 [2022-07-12 18:51:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:58,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:51:58,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:58,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689078854] [2022-07-12 18:51:58,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689078854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:51:58,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:51:58,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-07-12 18:51:58,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314897459] [2022-07-12 18:51:58,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:51:58,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:51:58,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:58,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:51:58,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:51:58,793 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 26 states, 24 states have (on average 1.5) internal successors, (36), 21 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:52:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:01,142 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-07-12 18:52:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 18:52:01,143 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5) internal successors, (36), 21 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 44 [2022-07-12 18:52:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:01,143 INFO L225 Difference]: With dead ends: 88 [2022-07-12 18:52:01,143 INFO L226 Difference]: Without dead ends: 88 [2022-07-12 18:52:01,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=242, Invalid=2208, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 18:52:01,144 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 111 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:01,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 516 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-12 18:52:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-12 18:52:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-07-12 18:52:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.293103448275862) internal successors, (75), 74 states have internal predecessors, (75), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:52:01,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-07-12 18:52:01,146 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 44 [2022-07-12 18:52:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:01,146 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-07-12 18:52:01,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5) internal successors, (36), 21 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:52:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-07-12 18:52:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:52:01,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:01,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:01,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:01,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:01,357 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:52:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:01,357 INFO L85 PathProgramCache]: Analyzing trace with hash 305014949, now seen corresponding path program 1 times [2022-07-12 18:52:01,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:01,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307722349] [2022-07-12 18:52:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:01,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:01,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:01,359 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) [2022-07-12 18:52:01,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-12 18:52:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:01,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:52:01,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:52:01,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:52:01,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:01,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307722349] [2022-07-12 18:52:01,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307722349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:52:01,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:52:01,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:52:01,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802719455] [2022-07-12 18:52:01,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:01,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:52:01,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:01,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:52:01,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:52:01,509 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:52:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:01,645 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-07-12 18:52:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:52:01,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-07-12 18:52:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:01,646 INFO L225 Difference]: With dead ends: 85 [2022-07-12 18:52:01,646 INFO L226 Difference]: Without dead ends: 85 [2022-07-12 18:52:01,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:52:01,646 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 39 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:01,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 172 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:52:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-12 18:52:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-12 18:52:01,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 72 states have internal predecessors, (73), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:52:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-07-12 18:52:01,648 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 49 [2022-07-12 18:52:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:01,648 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-07-12 18:52:01,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:52:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-07-12 18:52:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:52:01,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:01,649 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:01,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:01,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:01,849 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:52:01,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:01,849 INFO L85 PathProgramCache]: Analyzing trace with hash 305014950, now seen corresponding path program 1 times [2022-07-12 18:52:01,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:01,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267690604] [2022-07-12 18:52:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:01,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:01,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:01,851 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) [2022-07-12 18:52:01,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-12 18:52:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:02,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:52:02,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:02,205 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 29 treesize of output 17 [2022-07-12 18:52:02,206 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 44 treesize of output 20 [2022-07-12 18:52:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:52:02,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:03,365 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:52:03,366 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 44 treesize of output 46 [2022-07-12 18:52:10,179 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:52:10,525 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:52:10,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 151 [2022-07-12 18:52:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:52:13,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:13,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267690604] [2022-07-12 18:52:13,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267690604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:52:13,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:13,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-07-12 18:52:13,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877898177] [2022-07-12 18:52:13,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:13,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:52:13,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:13,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:52:13,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:52:13,212 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:17,322 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-07-12 18:52:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:52:17,324 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2022-07-12 18:52:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:17,325 INFO L225 Difference]: With dead ends: 96 [2022-07-12 18:52:17,325 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 18:52:17,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:52:17,326 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 99 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:17,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 576 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 627 Invalid, 0 Unknown, 213 Unchecked, 2.3s Time] [2022-07-12 18:52:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 18:52:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-07-12 18:52:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.253968253968254) internal successors, (79), 77 states have internal predecessors, (79), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 18:52:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-07-12 18:52:17,328 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 49 [2022-07-12 18:52:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:17,328 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-07-12 18:52:17,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:52:17,328 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-07-12 18:52:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:52:17,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:17,329 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] [2022-07-12 18:52:17,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:17,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:17,536 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:52:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:17,536 INFO L85 PathProgramCache]: Analyzing trace with hash 862140099, now seen corresponding path program 1 times [2022-07-12 18:52:17,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:17,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189792410] [2022-07-12 18:52:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:17,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:17,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:17,537 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) [2022-07-12 18:52:17,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-12 18:52:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:17,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:52:17,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:52:17,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:52:17,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:17,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189792410] [2022-07-12 18:52:17,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189792410] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:52:17,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:52:17,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:52:17,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151609245] [2022-07-12 18:52:17,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:17,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:52:17,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:52:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:52:17,693 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:52:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:17,949 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2022-07-12 18:52:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:52:17,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-07-12 18:52:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:17,950 INFO L225 Difference]: With dead ends: 89 [2022-07-12 18:52:17,951 INFO L226 Difference]: Without dead ends: 89 [2022-07-12 18:52:17,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:52:17,951 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 73 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:17,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 153 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:52:17,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-12 18:52:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-12 18:52:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 75 states have internal predecessors, (77), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 18:52:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-07-12 18:52:17,955 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 50 [2022-07-12 18:52:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:17,955 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-07-12 18:52:17,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:52:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-07-12 18:52:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:52:17,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:17,956 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] [2022-07-12 18:52:17,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:18,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:18,167 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:52:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash 862140100, now seen corresponding path program 1 times [2022-07-12 18:52:18,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:18,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696039324] [2022-07-12 18:52:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:18,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:18,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:18,170 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) [2022-07-12 18:52:18,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-12 18:52:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:18,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:52:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:52:18,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:52:18,508 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:18,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696039324] [2022-07-12 18:52:18,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696039324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:52:18,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:52:18,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:52:18,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822530945] [2022-07-12 18:52:18,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:18,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:52:18,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:18,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:52:18,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:52:18,509 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:52:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:18,777 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-07-12 18:52:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:52:18,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 50 [2022-07-12 18:52:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:18,778 INFO L225 Difference]: With dead ends: 88 [2022-07-12 18:52:18,778 INFO L226 Difference]: Without dead ends: 88 [2022-07-12 18:52:18,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:52:18,779 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:18,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 172 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:52:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-12 18:52:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-12 18:52:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 74 states have internal predecessors, (76), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 18:52:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-07-12 18:52:18,781 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 50 [2022-07-12 18:52:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:18,781 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-07-12 18:52:18,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:52:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-07-12 18:52:18,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 18:52:18,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:18,781 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] [2022-07-12 18:52:18,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:18,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:18,982 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:52:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:18,982 INFO L85 PathProgramCache]: Analyzing trace with hash 956539334, now seen corresponding path program 1 times [2022-07-12 18:52:18,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:18,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974221585] [2022-07-12 18:52:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:18,984 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) [2022-07-12 18:52:18,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-12 18:52:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:19,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:52:19,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:19,173 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 7 treesize of output 3 [2022-07-12 18:52:19,179 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 7 treesize of output 3 [2022-07-12 18:52:19,356 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 23 treesize of output 15 [2022-07-12 18:52:19,360 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 11 [2022-07-12 18:52:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:52:19,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:52:19,498 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:19,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974221585] [2022-07-12 18:52:19,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974221585] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:52:19,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:52:19,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:52:19,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090644939] [2022-07-12 18:52:19,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:52:19,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:52:19,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:19,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:52:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:52:19,499 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 13 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:52:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:20,144 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2022-07-12 18:52:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:52:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 51 [2022-07-12 18:52:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:20,146 INFO L225 Difference]: With dead ends: 87 [2022-07-12 18:52:20,146 INFO L226 Difference]: Without dead ends: 87 [2022-07-12 18:52:20,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:52:20,147 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 82 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:20,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 262 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:52:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-12 18:52:20,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-12 18:52:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 73 states have internal predecessors, (75), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 18:52:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-07-12 18:52:20,154 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 51 [2022-07-12 18:52:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:20,154 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-07-12 18:52:20,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:52:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-07-12 18:52:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:52:20,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:20,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:52:20,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:20,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:52:20,365 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_list_delErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-12 18:52:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1450404916, now seen corresponding path program 1 times [2022-07-12 18:52:20,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:20,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550368864] [2022-07-12 18:52:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:20,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:20,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:20,367 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) [2022-07-12 18:52:20,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-12 18:52:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:20,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-12 18:52:20,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:20,669 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:52:20,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-12 18:52:20,681 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:20,681 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 14 treesize of output 14 [2022-07-12 18:52:20,746 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 7 treesize of output 3 [2022-07-12 18:52:20,954 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 11 treesize of output 7 [2022-07-12 18:52:21,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:21,034 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 21 treesize of output 20 [2022-07-12 18:52:21,087 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:52:21,088 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-07-12 18:52:21,098 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 11 treesize of output 7 [2022-07-12 18:52:21,296 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 43 treesize of output 35 [2022-07-12 18:52:21,346 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 32 treesize of output 20 [2022-07-12 18:52:21,436 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:52:21,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-07-12 18:52:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:52:21,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:23,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:23,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550368864] [2022-07-12 18:52:23,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550368864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:23,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [353172561] [2022-07-12 18:52:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:23,136 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:52:23,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:52:23,137 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:52:23,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-12 18:52:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:23,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-12 18:52:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:23,943 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:23,943 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 [2022-07-12 18:52:24,165 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 7 treesize of output 3 [2022-07-12 18:52:24,169 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 7 treesize of output 3 [2022-07-12 18:52:24,772 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 11 treesize of output 7 [2022-07-12 18:52:24,782 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 11 treesize of output 7 [2022-07-12 18:52:25,016 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-12 18:52:25,016 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:52:25,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:52:25,035 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 21 treesize of output 20 [2022-07-12 18:52:25,233 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:52:25,233 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-07-12 18:52:25,268 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:52:25,268 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-12 18:52:25,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:52:25,721 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 23 treesize of output 15 [2022-07-12 18:52:25,729 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 23 [2022-07-12 18:52:26,569 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:52:26,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 18 [2022-07-12 18:52:26,574 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 7 treesize of output 3 [2022-07-12 18:52:26,972 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-12 18:52:26,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 40 [2022-07-12 18:52:26,982 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:52:26,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-12 18:52:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:52:27,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:29,280 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 602 treesize of output 586 [2022-07-12 18:52:29,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:52:29,622 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:52:29,623 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2022-07-12 18:52:29,633 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:52:29,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 36 [2022-07-12 18:52:29,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-12 18:52:30,576 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 1374 treesize of output 1358 [2022-07-12 18:52:30,609 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-07-12 18:52:30,610 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 1358 treesize of output 960 [2022-07-12 18:52:30,787 INFO L356 Elim1Store]: treesize reduction 33, result has 63.3 percent of original size [2022-07-12 18:52:30,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1334 treesize of output 1258 [2022-07-12 18:52:30,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1198 treesize of output 1134