./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.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/uthash-2.0.2/uthash_FNV_test10-1.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 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-13 01:17:16,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 01:17:16,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 01:17:16,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 01:17:16,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 01:17:16,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 01:17:16,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 01:17:16,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 01:17:16,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 01:17:16,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 01:17:16,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 01:17:16,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 01:17:16,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 01:17:16,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 01:17:16,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 01:17:16,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 01:17:16,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 01:17:16,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 01:17:16,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 01:17:16,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 01:17:16,895 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 01:17:16,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 01:17:16,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 01:17:16,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 01:17:16,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 01:17:16,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 01:17:16,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 01:17:16,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 01:17:16,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 01:17:16,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 01:17:16,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 01:17:16,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 01:17:16,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 01:17:16,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 01:17:16,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 01:17:16,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 01:17:16,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 01:17:16,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 01:17:16,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 01:17:16,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 01:17:16,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 01:17:16,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 01:17:16,912 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-13 01:17:16,928 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 01:17:16,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 01:17:16,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 01:17:16,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 01:17:16,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 01:17:16,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 01:17:16,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 01:17:16,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 01:17:16,930 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 01:17:16,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 01:17:16,931 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 01:17:16,931 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-13 01:17:16,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 01:17:16,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 01:17:16,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 01:17:16,931 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-13 01:17:16,932 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-13 01:17:16,932 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-13 01:17:16,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 01:17:16,933 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 01:17:16,933 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 01:17:16,933 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 01:17:16,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 01:17:16,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 01:17:16,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 01:17:16,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 01:17:16,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 01:17:16,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 01:17:16,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 01:17:16,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 01:17:16,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 [2022-07-13 01:17:17,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 01:17:17,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 01:17:17,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 01:17:17,124 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 01:17:17,124 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 01:17:17,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2022-07-13 01:17:17,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7ba5c409/858962c128734d4c8247c4d3bbff6e07/FLAGc53d9d1f4 [2022-07-13 01:17:17,562 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 01:17:17,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2022-07-13 01:17:17,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7ba5c409/858962c128734d4c8247c4d3bbff6e07/FLAGc53d9d1f4 [2022-07-13 01:17:17,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7ba5c409/858962c128734d4c8247c4d3bbff6e07 [2022-07-13 01:17:17,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 01:17:17,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 01:17:17,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 01:17:17,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 01:17:17,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 01:17:17,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:17:17" (1/1) ... [2022-07-13 01:17:17,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447b3b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:17, skipping insertion in model container [2022-07-13 01:17:17,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:17:17" (1/1) ... [2022-07-13 01:17:17,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 01:17:17,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 01:17:17,946 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i[33022,33035] [2022-07-13 01:17:18,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 01:17:18,113 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) [2022-07-13 01:17:18,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1cc8d400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:18, skipping insertion in model container [2022-07-13 01:17:18,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 01:17:18,114 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-13 01:17:18,116 INFO L158 Benchmark]: Toolchain (without parser) took 516.87ms. Allocated memory is still 102.8MB. Free memory was 66.8MB in the beginning and 58.8MB in the end (delta: 8.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 01:17:18,116 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory is still 57.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 01:17:18,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 515.23ms. Allocated memory is still 102.8MB. Free memory was 66.5MB in the beginning and 58.8MB in the end (delta: 7.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 01:17:18,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory is still 57.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 515.23ms. Allocated memory is still 102.8MB. Free memory was 66.5MB in the beginning and 58.8MB in the end (delta: 7.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.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 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-13 01:17:19,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 01:17:19,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 01:17:19,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 01:17:19,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 01:17:19,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 01:17:19,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 01:17:19,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 01:17:19,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 01:17:19,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 01:17:19,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 01:17:19,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 01:17:19,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 01:17:19,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 01:17:19,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 01:17:19,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 01:17:19,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 01:17:19,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 01:17:19,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 01:17:19,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 01:17:19,608 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 01:17:19,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 01:17:19,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 01:17:19,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 01:17:19,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 01:17:19,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 01:17:19,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 01:17:19,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 01:17:19,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 01:17:19,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 01:17:19,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 01:17:19,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 01:17:19,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 01:17:19,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 01:17:19,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 01:17:19,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 01:17:19,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 01:17:19,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 01:17:19,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 01:17:19,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 01:17:19,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 01:17:19,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 01:17:19,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-13 01:17:19,649 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 01:17:19,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 01:17:19,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 01:17:19,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 01:17:19,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 01:17:19,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 01:17:19,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 01:17:19,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 01:17:19,654 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 01:17:19,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 01:17:19,654 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 01:17:19,655 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-13 01:17:19,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 01:17:19,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 01:17:19,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 01:17:19,660 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-13 01:17:19,660 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-13 01:17:19,660 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-13 01:17:19,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 01:17:19,661 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 01:17:19,661 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 01:17:19,661 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 01:17:19,662 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 01:17:19,662 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 01:17:19,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 01:17:19,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 01:17:19,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 01:17:19,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 01:17:19,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 01:17:19,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 01:17:19,663 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 01:17:19,663 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 01:17:19,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 01:17:19,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43c551c05c986c34609f999e25a13e0dbb4f692e7b1d3b7f2939ec615c71d0d0 [2022-07-13 01:17:19,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 01:17:19,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 01:17:19,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 01:17:19,941 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 01:17:19,941 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 01:17:19,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2022-07-13 01:17:19,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e28453e2/58712348f3fe4b6d85a9361d71864531/FLAG93b6af7a2 [2022-07-13 01:17:20,407 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 01:17:20,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i [2022-07-13 01:17:20,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e28453e2/58712348f3fe4b6d85a9361d71864531/FLAG93b6af7a2 [2022-07-13 01:17:20,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e28453e2/58712348f3fe4b6d85a9361d71864531 [2022-07-13 01:17:20,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 01:17:20,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 01:17:20,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 01:17:20,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 01:17:20,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 01:17:20,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:17:20" (1/1) ... [2022-07-13 01:17:20,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41641b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:20, skipping insertion in model container [2022-07-13 01:17:20,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:17:20" (1/1) ... [2022-07-13 01:17:20,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 01:17:20,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 01:17:21,067 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i[33022,33035] [2022-07-13 01:17:21,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 01:17:21,246 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-13 01:17:21,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 01:17:21,266 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i[33022,33035] [2022-07-13 01:17:21,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 01:17:21,349 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 01:17:21,363 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-1.i[33022,33035] [2022-07-13 01:17:21,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 01:17:21,466 INFO L208 MainTranslator]: Completed translation [2022-07-13 01:17:21,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21 WrapperNode [2022-07-13 01:17:21,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 01:17:21,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 01:17:21,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 01:17:21,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 01:17:21,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21" (1/1) ... [2022-07-13 01:17:21,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21" (1/1) ... [2022-07-13 01:17:21,588 INFO L137 Inliner]: procedures = 180, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2184 [2022-07-13 01:17:21,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 01:17:21,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 01:17:21,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 01:17:21,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 01:17:21,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21" (1/1) ... [2022-07-13 01:17:21,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21" (1/1) ... [2022-07-13 01:17:21,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21" (1/1) ... [2022-07-13 01:17:21,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21" (1/1) ... [2022-07-13 01:17:21,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21" (1/1) ... [2022-07-13 01:17:21,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21" (1/1) ... [2022-07-13 01:17:21,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21" (1/1) ... [2022-07-13 01:17:21,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 01:17:21,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 01:17:21,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 01:17:21,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 01:17:21,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21" (1/1) ... [2022-07-13 01:17:21,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 01:17:21,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 01:17:21,744 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) [2022-07-13 01:17:21,773 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 [2022-07-13 01:17:21,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-13 01:17:21,782 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-07-13 01:17:21,782 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-07-13 01:17:21,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-13 01:17:21,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 01:17:21,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 01:17:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-13 01:17:21,784 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-13 01:17:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 01:17:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 01:17:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 01:17:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 01:17:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-13 01:17:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 01:17:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 01:17:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-13 01:17:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 01:17:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 01:17:21,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 01:17:22,029 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 01:17:22,030 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 01:17:22,033 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 01:17:27,346 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 01:17:27,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 01:17:27,361 INFO L299 CfgBuilder]: Removed 151 assume(true) statements. [2022-07-13 01:17:27,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:17:27 BoogieIcfgContainer [2022-07-13 01:17:27,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 01:17:27,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 01:17:27,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 01:17:27,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 01:17:27,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:17:20" (1/3) ... [2022-07-13 01:17:27,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee0b761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:17:27, skipping insertion in model container [2022-07-13 01:17:27,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:17:21" (2/3) ... [2022-07-13 01:17:27,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee0b761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:17:27, skipping insertion in model container [2022-07-13 01:17:27,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:17:27" (3/3) ... [2022-07-13 01:17:27,370 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test10-1.i [2022-07-13 01:17:27,379 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 01:17:27,379 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 990 error locations. [2022-07-13 01:17:27,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 01:17:27,424 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@3c87e997, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15c1f1f4 [2022-07-13 01:17:27,424 INFO L358 AbstractCegarLoop]: Starting to check reachability of 990 error locations. [2022-07-13 01:17:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-13 01:17:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-13 01:17:27,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:27,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-13 01:17:27,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:27,437 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2022-07-13 01:17:27,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:27,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104561155] [2022-07-13 01:17:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:27,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:27,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:27,448 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) [2022-07-13 01:17:27,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 01:17:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:27,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:17:27,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:27,726 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 [2022-07-13 01:17:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:27,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:27,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:27,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104561155] [2022-07-13 01:17:27,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104561155] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:27,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:27,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 01:17:27,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949446642] [2022-07-13 01:17:27,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:27,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:17:27,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:27,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:17:27,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:27,758 INFO L87 Difference]: Start difference. First operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:30,047 INFO L93 Difference]: Finished difference Result 2558 states and 2724 transitions. [2022-07-13 01:17:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:17:30,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-13 01:17:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:30,077 INFO L225 Difference]: With dead ends: 2558 [2022-07-13 01:17:30,077 INFO L226 Difference]: Without dead ends: 2556 [2022-07-13 01:17:30,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:30,081 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 1951 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:30,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1961 Valid, 1646 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 01:17:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-07-13 01:17:30,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2202. [2022-07-13 01:17:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 1224 states have (on average 2.037581699346405) internal successors, (2494), 2186 states have internal predecessors, (2494), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-13 01:17:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2526 transitions. [2022-07-13 01:17:30,176 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2526 transitions. Word has length 3 [2022-07-13 01:17:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:30,177 INFO L495 AbstractCegarLoop]: Abstraction has 2202 states and 2526 transitions. [2022-07-13 01:17:30,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2526 transitions. [2022-07-13 01:17:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-13 01:17:30,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:30,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-13 01:17:30,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-13 01:17:30,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:30,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2022-07-13 01:17:30,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:30,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711245221] [2022-07-13 01:17:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:30,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:30,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:30,386 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) [2022-07-13 01:17:30,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 01:17:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:30,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 01:17:30,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:30,546 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 [2022-07-13 01:17:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:30,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:30,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:30,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711245221] [2022-07-13 01:17:30,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711245221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:30,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:30,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 01:17:30,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610705706] [2022-07-13 01:17:30,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:30,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:17:30,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:17:30,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:30,555 INFO L87 Difference]: Start difference. First operand 2202 states and 2526 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:33,604 INFO L93 Difference]: Finished difference Result 2973 states and 3378 transitions. [2022-07-13 01:17:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:17:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-13 01:17:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:33,613 INFO L225 Difference]: With dead ends: 2973 [2022-07-13 01:17:33,613 INFO L226 Difference]: Without dead ends: 2973 [2022-07-13 01:17:33,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:33,615 INFO L413 NwaCegarLoop]: 1837 mSDtfsCounter, 844 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 3017 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:33,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 3017 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-13 01:17:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2022-07-13 01:17:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2651. [2022-07-13 01:17:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 1671 states have (on average 1.9970077797725914) internal successors, (3337), 2632 states have internal predecessors, (3337), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-13 01:17:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 3375 transitions. [2022-07-13 01:17:33,663 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 3375 transitions. Word has length 3 [2022-07-13 01:17:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:33,663 INFO L495 AbstractCegarLoop]: Abstraction has 2651 states and 3375 transitions. [2022-07-13 01:17:33,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:33,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 3375 transitions. [2022-07-13 01:17:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-13 01:17:33,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:33,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:17:33,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:33,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:33,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:33,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2022-07-13 01:17:33,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:33,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598512535] [2022-07-13 01:17:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:33,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:33,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:33,875 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) [2022-07-13 01:17:33,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 01:17:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:34,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 01:17:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:34,030 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 [2022-07-13 01:17:34,033 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 [2022-07-13 01:17:34,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 01:17:34,063 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 [2022-07-13 01:17:34,070 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 01:17:34,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-13 01:17:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:34,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:34,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598512535] [2022-07-13 01:17:34,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598512535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:34,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:34,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:17:34,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180060776] [2022-07-13 01:17:34,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:34,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:17:34,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:17:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:17:34,090 INFO L87 Difference]: Start difference. First operand 2651 states and 3375 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:39,442 INFO L93 Difference]: Finished difference Result 4906 states and 5782 transitions. [2022-07-13 01:17:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:17:39,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-13 01:17:39,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:39,454 INFO L225 Difference]: With dead ends: 4906 [2022-07-13 01:17:39,455 INFO L226 Difference]: Without dead ends: 4906 [2022-07-13 01:17:39,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:17:39,456 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 4307 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4317 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:39,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4317 Valid, 2067 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-07-13 01:17:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2022-07-13 01:17:39,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 3370. [2022-07-13 01:17:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 2390 states have (on average 2.0351464435146442) internal successors, (4864), 3345 states have internal predecessors, (4864), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 4914 transitions. [2022-07-13 01:17:39,515 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 4914 transitions. Word has length 7 [2022-07-13 01:17:39,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:39,515 INFO L495 AbstractCegarLoop]: Abstraction has 3370 states and 4914 transitions. [2022-07-13 01:17:39,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 4914 transitions. [2022-07-13 01:17:39,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 01:17:39,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:39,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:17:39,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:39,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:39,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2022-07-13 01:17:39,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:39,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15985321] [2022-07-13 01:17:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:39,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:39,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:39,725 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) [2022-07-13 01:17:39,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 01:17:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:17:39,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:39,877 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 [2022-07-13 01:17:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:39,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:39,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:39,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15985321] [2022-07-13 01:17:39,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15985321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:39,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:39,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 01:17:39,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532180460] [2022-07-13 01:17:39,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:39,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:17:39,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:39,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:17:39,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:39,891 INFO L87 Difference]: Start difference. First operand 3370 states and 4914 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:42,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:42,186 INFO L93 Difference]: Finished difference Result 4574 states and 6431 transitions. [2022-07-13 01:17:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:17:42,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-13 01:17:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:42,200 INFO L225 Difference]: With dead ends: 4574 [2022-07-13 01:17:42,202 INFO L226 Difference]: Without dead ends: 4574 [2022-07-13 01:17:42,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:42,204 INFO L413 NwaCegarLoop]: 1967 mSDtfsCounter, 1998 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:42,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 2622 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 01:17:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4574 states. [2022-07-13 01:17:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4574 to 3279. [2022-07-13 01:17:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3279 states, 2390 states have (on average 1.9460251046025105) internal successors, (4651), 3254 states have internal predecessors, (4651), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 4701 transitions. [2022-07-13 01:17:42,291 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 4701 transitions. Word has length 8 [2022-07-13 01:17:42,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:42,294 INFO L495 AbstractCegarLoop]: Abstraction has 3279 states and 4701 transitions. [2022-07-13 01:17:42,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 4701 transitions. [2022-07-13 01:17:42,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 01:17:42,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:42,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:17:42,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:42,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:42,503 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2022-07-13 01:17:42,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:42,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561265547] [2022-07-13 01:17:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:42,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:42,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:42,506 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) [2022-07-13 01:17:42,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 01:17:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:42,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 01:17:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:42,634 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 [2022-07-13 01:17:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:42,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:42,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:42,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561265547] [2022-07-13 01:17:42,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561265547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:42,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:42,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 01:17:42,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138888425] [2022-07-13 01:17:42,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:42,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:17:42,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:42,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:17:42,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:42,649 INFO L87 Difference]: Start difference. First operand 3279 states and 4701 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:45,747 INFO L93 Difference]: Finished difference Result 4996 states and 7060 transitions. [2022-07-13 01:17:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:17:45,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-13 01:17:45,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:45,759 INFO L225 Difference]: With dead ends: 4996 [2022-07-13 01:17:45,759 INFO L226 Difference]: Without dead ends: 4996 [2022-07-13 01:17:45,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:45,760 INFO L413 NwaCegarLoop]: 2347 mSDtfsCounter, 1371 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:45,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1375 Valid, 3335 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-13 01:17:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2022-07-13 01:17:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 3601. [2022-07-13 01:17:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 2722 states have (on average 1.9335047759000734) internal successors, (5263), 3576 states have internal predecessors, (5263), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5313 transitions. [2022-07-13 01:17:45,810 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5313 transitions. Word has length 8 [2022-07-13 01:17:45,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:45,811 INFO L495 AbstractCegarLoop]: Abstraction has 3601 states and 5313 transitions. [2022-07-13 01:17:45,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5313 transitions. [2022-07-13 01:17:45,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 01:17:45,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:45,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:17:45,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:46,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:46,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2022-07-13 01:17:46,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:46,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502829876] [2022-07-13 01:17:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:46,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:46,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:46,021 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) [2022-07-13 01:17:46,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-13 01:17:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:46,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 01:17:46,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:46,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:46,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:46,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502829876] [2022-07-13 01:17:46,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502829876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:46,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:46,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:17:46,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125510861] [2022-07-13 01:17:46,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:46,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:17:46,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:46,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:17:46,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:46,167 INFO L87 Difference]: Start difference. First operand 3601 states and 5313 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:46,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:46,214 INFO L93 Difference]: Finished difference Result 3541 states and 5227 transitions. [2022-07-13 01:17:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:17:46,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 01:17:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:46,228 INFO L225 Difference]: With dead ends: 3541 [2022-07-13 01:17:46,228 INFO L226 Difference]: Without dead ends: 3541 [2022-07-13 01:17:46,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:46,228 INFO L413 NwaCegarLoop]: 2011 mSDtfsCounter, 801 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 3227 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:46,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 3227 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:17:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2022-07-13 01:17:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3541. [2022-07-13 01:17:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2686 states have (on average 1.9274013402829486) internal successors, (5177), 3516 states have internal predecessors, (5177), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5227 transitions. [2022-07-13 01:17:46,265 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5227 transitions. Word has length 11 [2022-07-13 01:17:46,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:46,265 INFO L495 AbstractCegarLoop]: Abstraction has 3541 states and 5227 transitions. [2022-07-13 01:17:46,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:46,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5227 transitions. [2022-07-13 01:17:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 01:17:46,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:46,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:17:46,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:46,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:46,473 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:46,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:46,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2022-07-13 01:17:46,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:46,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125094078] [2022-07-13 01:17:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:46,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:46,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:46,478 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) [2022-07-13 01:17:46,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-13 01:17:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:46,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:17:46,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:46,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:46,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:46,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125094078] [2022-07-13 01:17:46,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125094078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:46,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:46,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:17:46,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326203065] [2022-07-13 01:17:46,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:46,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:17:46,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:46,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:17:46,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:17:46,633 INFO L87 Difference]: Start difference. First operand 3541 states and 5227 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:46,689 INFO L93 Difference]: Finished difference Result 3513 states and 5171 transitions. [2022-07-13 01:17:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:17:46,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-13 01:17:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:46,703 INFO L225 Difference]: With dead ends: 3513 [2022-07-13 01:17:46,703 INFO L226 Difference]: Without dead ends: 3513 [2022-07-13 01:17:46,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:17:46,704 INFO L413 NwaCegarLoop]: 1966 mSDtfsCounter, 772 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 5141 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:46,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 5141 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:17:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-07-13 01:17:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3511. [2022-07-13 01:17:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2670 states have (on average 1.9172284644194757) internal successors, (5119), 3486 states have internal predecessors, (5119), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5169 transitions. [2022-07-13 01:17:46,746 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5169 transitions. Word has length 13 [2022-07-13 01:17:46,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:46,746 INFO L495 AbstractCegarLoop]: Abstraction has 3511 states and 5169 transitions. [2022-07-13 01:17:46,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5169 transitions. [2022-07-13 01:17:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 01:17:46,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:46,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:17:46,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:46,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:46,955 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:46,956 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2022-07-13 01:17:46,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:46,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619960469] [2022-07-13 01:17:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:46,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:46,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:46,957 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) [2022-07-13 01:17:46,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-13 01:17:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:47,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 01:17:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:47,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:47,117 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:47,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619960469] [2022-07-13 01:17:47,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619960469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:47,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:47,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:17:47,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75974880] [2022-07-13 01:17:47,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:47,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:17:47,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:17:47,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:47,119 INFO L87 Difference]: Start difference. First operand 3511 states and 5169 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:47,150 INFO L93 Difference]: Finished difference Result 4760 states and 6526 transitions. [2022-07-13 01:17:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:17:47,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-13 01:17:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:47,159 INFO L225 Difference]: With dead ends: 4760 [2022-07-13 01:17:47,159 INFO L226 Difference]: Without dead ends: 4760 [2022-07-13 01:17:47,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:47,160 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 1892 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 4705 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:47,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1902 Valid, 4705 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:17:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-07-13 01:17:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 3451. [2022-07-13 01:17:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 2634 states have (on average 1.910782080485953) internal successors, (5033), 3426 states have internal predecessors, (5033), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 5083 transitions. [2022-07-13 01:17:47,201 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 5083 transitions. Word has length 20 [2022-07-13 01:17:47,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:47,201 INFO L495 AbstractCegarLoop]: Abstraction has 3451 states and 5083 transitions. [2022-07-13 01:17:47,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 5083 transitions. [2022-07-13 01:17:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 01:17:47,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:47,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:17:47,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:47,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:47,412 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:47,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:47,412 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2022-07-13 01:17:47,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:47,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707507677] [2022-07-13 01:17:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:47,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:47,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:47,414 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) [2022-07-13 01:17:47,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-13 01:17:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:47,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 01:17:47,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:47,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:47,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:47,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707507677] [2022-07-13 01:17:47,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707507677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:47,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:47,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:17:47,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297224957] [2022-07-13 01:17:47,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:47,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:17:47,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:17:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:47,587 INFO L87 Difference]: Start difference. First operand 3451 states and 5083 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:47,619 INFO L93 Difference]: Finished difference Result 4593 states and 6235 transitions. [2022-07-13 01:17:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:17:47,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-13 01:17:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:47,626 INFO L225 Difference]: With dead ends: 4593 [2022-07-13 01:17:47,627 INFO L226 Difference]: Without dead ends: 4593 [2022-07-13 01:17:47,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:17:47,629 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 1849 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 4566 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:47,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1859 Valid, 4566 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:17:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2022-07-13 01:17:47,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3319. [2022-07-13 01:17:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 2526 states have (on average 1.8903404592240696) internal successors, (4775), 3294 states have internal predecessors, (4775), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 4825 transitions. [2022-07-13 01:17:47,686 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 4825 transitions. Word has length 20 [2022-07-13 01:17:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:47,686 INFO L495 AbstractCegarLoop]: Abstraction has 3319 states and 4825 transitions. [2022-07-13 01:17:47,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 4825 transitions. [2022-07-13 01:17:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 01:17:47,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:47,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:17:47,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:47,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:47,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:47,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2022-07-13 01:17:47,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:47,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384477691] [2022-07-13 01:17:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:47,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:47,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:47,897 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) [2022-07-13 01:17:47,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-13 01:17:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:48,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:17:48,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:48,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:48,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:48,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384477691] [2022-07-13 01:17:48,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384477691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:48,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:48,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:17:48,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819913419] [2022-07-13 01:17:48,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:48,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:17:48,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:48,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:17:48,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:17:48,074 INFO L87 Difference]: Start difference. First operand 3319 states and 4825 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:48,141 INFO L93 Difference]: Finished difference Result 4558 states and 6169 transitions. [2022-07-13 01:17:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:17:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-13 01:17:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:48,148 INFO L225 Difference]: With dead ends: 4558 [2022-07-13 01:17:48,148 INFO L226 Difference]: Without dead ends: 4558 [2022-07-13 01:17:48,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:17:48,148 INFO L413 NwaCegarLoop]: 3168 mSDtfsCounter, 1820 mSDsluCounter, 4524 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 7692 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:48,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1830 Valid, 7692 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:17:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2022-07-13 01:17:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 3289. [2022-07-13 01:17:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 2510 states have (on average 1.8792828685258964) internal successors, (4717), 3264 states have internal predecessors, (4717), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4767 transitions. [2022-07-13 01:17:48,191 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4767 transitions. Word has length 22 [2022-07-13 01:17:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:48,191 INFO L495 AbstractCegarLoop]: Abstraction has 3289 states and 4767 transitions. [2022-07-13 01:17:48,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4767 transitions. [2022-07-13 01:17:48,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 01:17:48,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:48,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:17:48,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:48,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:48,408 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2022-07-13 01:17:48,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:48,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750967147] [2022-07-13 01:17:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:48,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:48,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:48,410 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) [2022-07-13 01:17:48,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-13 01:17:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:48,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:17:48,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:48,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:48,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:48,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750967147] [2022-07-13 01:17:48,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750967147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:48,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:48,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:17:48,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933678558] [2022-07-13 01:17:48,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:48,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:17:48,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:48,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:17:48,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:17:48,588 INFO L87 Difference]: Start difference. First operand 3289 states and 4767 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:48,658 INFO L93 Difference]: Finished difference Result 4485 states and 5980 transitions. [2022-07-13 01:17:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:17:48,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-13 01:17:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:48,665 INFO L225 Difference]: With dead ends: 4485 [2022-07-13 01:17:48,665 INFO L226 Difference]: Without dead ends: 4485 [2022-07-13 01:17:48,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:17:48,666 INFO L413 NwaCegarLoop]: 3093 mSDtfsCounter, 1785 mSDsluCounter, 4409 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 7502 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:48,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1795 Valid, 7502 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:17:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2022-07-13 01:17:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 3227. [2022-07-13 01:17:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 2462 states have (on average 1.8452477660438669) internal successors, (4543), 3202 states have internal predecessors, (4543), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 4593 transitions. [2022-07-13 01:17:48,709 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 4593 transitions. Word has length 22 [2022-07-13 01:17:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:48,710 INFO L495 AbstractCegarLoop]: Abstraction has 3227 states and 4593 transitions. [2022-07-13 01:17:48,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 4593 transitions. [2022-07-13 01:17:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 01:17:48,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:48,711 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] [2022-07-13 01:17:48,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:48,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:48,919 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:48,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2022-07-13 01:17:48,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:48,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841316118] [2022-07-13 01:17:48,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:48,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:48,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:48,921 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) [2022-07-13 01:17:48,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-13 01:17:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 01:17:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:49,063 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 [2022-07-13 01:17:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:49,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:49,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:49,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841316118] [2022-07-13 01:17:49,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841316118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:49,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:49,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:17:49,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406862643] [2022-07-13 01:17:49,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:49,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:17:49,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:49,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:17:49,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:17:49,098 INFO L87 Difference]: Start difference. First operand 3227 states and 4593 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:51,094 INFO L93 Difference]: Finished difference Result 3502 states and 4766 transitions. [2022-07-13 01:17:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:17:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-13 01:17:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:51,099 INFO L225 Difference]: With dead ends: 3502 [2022-07-13 01:17:51,099 INFO L226 Difference]: Without dead ends: 3502 [2022-07-13 01:17:51,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:17:51,099 INFO L413 NwaCegarLoop]: 1123 mSDtfsCounter, 2363 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:51,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2369 Valid, 2017 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 01:17:51,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2022-07-13 01:17:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3223. [2022-07-13 01:17:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2462 states have (on average 1.8419983753046303) internal successors, (4535), 3198 states have internal predecessors, (4535), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4585 transitions. [2022-07-13 01:17:51,127 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4585 transitions. Word has length 27 [2022-07-13 01:17:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:51,127 INFO L495 AbstractCegarLoop]: Abstraction has 3223 states and 4585 transitions. [2022-07-13 01:17:51,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4585 transitions. [2022-07-13 01:17:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 01:17:51,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:51,130 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] [2022-07-13 01:17:51,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:51,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:51,337 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:51,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:51,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2022-07-13 01:17:51,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:51,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670752093] [2022-07-13 01:17:51,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:51,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:51,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:51,339 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) [2022-07-13 01:17:51,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-13 01:17:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:51,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 01:17:51,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:51,497 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 [2022-07-13 01:17:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:51,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:51,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:51,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670752093] [2022-07-13 01:17:51,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670752093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:51,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:51,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:17:51,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405922120] [2022-07-13 01:17:51,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:51,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:17:51,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:51,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:17:51,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:17:51,577 INFO L87 Difference]: Start difference. First operand 3223 states and 4585 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:54,777 INFO L93 Difference]: Finished difference Result 3925 states and 5359 transitions. [2022-07-13 01:17:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 01:17:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-13 01:17:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:54,783 INFO L225 Difference]: With dead ends: 3925 [2022-07-13 01:17:54,783 INFO L226 Difference]: Without dead ends: 3925 [2022-07-13 01:17:54,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:17:54,783 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 1487 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:54,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 3475 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-13 01:17:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2022-07-13 01:17:54,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3259. [2022-07-13 01:17:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 2498 states have (on average 1.831865492393915) internal successors, (4576), 3234 states have internal predecessors, (4576), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 4626 transitions. [2022-07-13 01:17:54,819 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 4626 transitions. Word has length 27 [2022-07-13 01:17:54,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:54,819 INFO L495 AbstractCegarLoop]: Abstraction has 3259 states and 4626 transitions. [2022-07-13 01:17:54,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 4626 transitions. [2022-07-13 01:17:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 01:17:54,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:54,822 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] [2022-07-13 01:17:54,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:55,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:55,032 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:55,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2022-07-13 01:17:55,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:55,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519842735] [2022-07-13 01:17:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:55,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:55,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:55,034 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) [2022-07-13 01:17:55,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-13 01:17:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:55,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 01:17:55,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:55,212 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 [2022-07-13 01:17:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:55,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:55,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:55,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519842735] [2022-07-13 01:17:55,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519842735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:55,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:55,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:17:55,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002730544] [2022-07-13 01:17:55,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:55,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:17:55,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:55,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:17:55,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:17:55,254 INFO L87 Difference]: Start difference. First operand 3259 states and 4626 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:58,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:17:58,480 INFO L93 Difference]: Finished difference Result 6304 states and 8790 transitions. [2022-07-13 01:17:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:17:58,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-13 01:17:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:17:58,488 INFO L225 Difference]: With dead ends: 6304 [2022-07-13 01:17:58,488 INFO L226 Difference]: Without dead ends: 6304 [2022-07-13 01:17:58,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:17:58,489 INFO L413 NwaCegarLoop]: 2393 mSDtfsCounter, 3502 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-13 01:17:58,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 4226 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-13 01:17:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2022-07-13 01:17:58,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 3255. [2022-07-13 01:17:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2498 states have (on average 1.8286629303442754) internal successors, (4568), 3230 states have internal predecessors, (4568), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:17:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4618 transitions. [2022-07-13 01:17:58,536 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4618 transitions. Word has length 36 [2022-07-13 01:17:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:17:58,537 INFO L495 AbstractCegarLoop]: Abstraction has 3255 states and 4618 transitions. [2022-07-13 01:17:58,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:17:58,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4618 transitions. [2022-07-13 01:17:58,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 01:17:58,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:17:58,538 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] [2022-07-13 01:17:58,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-13 01:17:58,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:17:58,746 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:17:58,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:17:58,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2022-07-13 01:17:58,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:17:58,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872801690] [2022-07-13 01:17:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:17:58,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:17:58,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:17:58,750 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) [2022-07-13 01:17:58,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-13 01:17:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:17:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 01:17:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:17:58,934 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 [2022-07-13 01:17:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:17:59,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:17:59,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:17:59,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872801690] [2022-07-13 01:17:59,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872801690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:17:59,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:17:59,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:17:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478323651] [2022-07-13 01:17:59,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:17:59,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:17:59,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:17:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:17:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:17:59,030 INFO L87 Difference]: Start difference. First operand 3255 states and 4618 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:03,413 INFO L93 Difference]: Finished difference Result 5973 states and 8166 transitions. [2022-07-13 01:18:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:18:03,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-13 01:18:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:03,419 INFO L225 Difference]: With dead ends: 5973 [2022-07-13 01:18:03,419 INFO L226 Difference]: Without dead ends: 5973 [2022-07-13 01:18:03,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:03,420 INFO L413 NwaCegarLoop]: 2332 mSDtfsCounter, 2860 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2864 SdHoareTripleChecker+Valid, 4625 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:03,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2864 Valid, 4625 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 01:18:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2022-07-13 01:18:03,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 3251. [2022-07-13 01:18:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2498 states have (on average 1.8254603682946358) internal successors, (4560), 3226 states have internal predecessors, (4560), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:18:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4610 transitions. [2022-07-13 01:18:03,454 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4610 transitions. Word has length 36 [2022-07-13 01:18:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:03,454 INFO L495 AbstractCegarLoop]: Abstraction has 3251 states and 4610 transitions. [2022-07-13 01:18:03,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4610 transitions. [2022-07-13 01:18:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 01:18:03,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:03,455 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] [2022-07-13 01:18:03,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-13 01:18:03,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:03,663 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2022-07-13 01:18:03,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:03,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423925450] [2022-07-13 01:18:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:03,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:03,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:03,664 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) [2022-07-13 01:18:03,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-13 01:18:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 01:18:03,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:03,829 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 [2022-07-13 01:18:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:03,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:03,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:03,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423925450] [2022-07-13 01:18:03,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423925450] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:03,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:03,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:18:03,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844823785] [2022-07-13 01:18:03,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:03,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:18:03,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:03,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:18:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:18:03,887 INFO L87 Difference]: Start difference. First operand 3251 states and 4610 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:07,420 INFO L93 Difference]: Finished difference Result 6748 states and 9302 transitions. [2022-07-13 01:18:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 01:18:07,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-13 01:18:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:07,427 INFO L225 Difference]: With dead ends: 6748 [2022-07-13 01:18:07,427 INFO L226 Difference]: Without dead ends: 6748 [2022-07-13 01:18:07,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:07,429 INFO L413 NwaCegarLoop]: 1965 mSDtfsCounter, 4494 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 3990 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:07,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4504 Valid, 3990 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-13 01:18:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2022-07-13 01:18:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 3248. [2022-07-13 01:18:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2498 states have (on average 1.8166533226581265) internal successors, (4538), 3223 states have internal predecessors, (4538), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:18:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4588 transitions. [2022-07-13 01:18:07,470 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4588 transitions. Word has length 36 [2022-07-13 01:18:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:07,470 INFO L495 AbstractCegarLoop]: Abstraction has 3248 states and 4588 transitions. [2022-07-13 01:18:07,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4588 transitions. [2022-07-13 01:18:07,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 01:18:07,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:07,471 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] [2022-07-13 01:18:07,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:07,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:07,679 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:07,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2022-07-13 01:18:07,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:07,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643414129] [2022-07-13 01:18:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:07,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:07,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:07,681 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) [2022-07-13 01:18:07,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-13 01:18:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:07,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 01:18:07,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:07,852 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 [2022-07-13 01:18:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:07,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:07,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:07,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643414129] [2022-07-13 01:18:07,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643414129] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:07,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:07,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:18:07,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733084449] [2022-07-13 01:18:07,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:07,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:18:07,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:18:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:18:07,960 INFO L87 Difference]: Start difference. First operand 3248 states and 4588 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:11,645 INFO L93 Difference]: Finished difference Result 4807 states and 6551 transitions. [2022-07-13 01:18:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:18:11,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-13 01:18:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:11,650 INFO L225 Difference]: With dead ends: 4807 [2022-07-13 01:18:11,650 INFO L226 Difference]: Without dead ends: 4807 [2022-07-13 01:18:11,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:11,650 INFO L413 NwaCegarLoop]: 2238 mSDtfsCounter, 2208 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2208 SdHoareTripleChecker+Valid, 4103 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:11,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2208 Valid, 4103 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-07-13 01:18:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2022-07-13 01:18:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 3248. [2022-07-13 01:18:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2498 states have (on average 1.8134507606084869) internal successors, (4530), 3223 states have internal predecessors, (4530), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:18:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4580 transitions. [2022-07-13 01:18:11,684 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4580 transitions. Word has length 36 [2022-07-13 01:18:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:11,684 INFO L495 AbstractCegarLoop]: Abstraction has 3248 states and 4580 transitions. [2022-07-13 01:18:11,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4580 transitions. [2022-07-13 01:18:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 01:18:11,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:11,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:11,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:11,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:11,888 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:11,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2022-07-13 01:18:11,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:11,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649483174] [2022-07-13 01:18:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:11,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:11,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:11,890 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) [2022-07-13 01:18:11,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-13 01:18:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:12,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:18:12,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:12,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:12,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649483174] [2022-07-13 01:18:12,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649483174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:12,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:12,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:18:12,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724055055] [2022-07-13 01:18:12,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:12,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:18:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:12,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:18:12,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:18:12,078 INFO L87 Difference]: Start difference. First operand 3248 states and 4580 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:12,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:12,120 INFO L93 Difference]: Finished difference Result 3236 states and 4556 transitions. [2022-07-13 01:18:12,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:18:12,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-13 01:18:12,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:12,123 INFO L225 Difference]: With dead ends: 3236 [2022-07-13 01:18:12,124 INFO L226 Difference]: Without dead ends: 3236 [2022-07-13 01:18:12,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:12,124 INFO L413 NwaCegarLoop]: 1797 mSDtfsCounter, 756 mSDsluCounter, 2825 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 4622 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:12,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 4622 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:18:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2022-07-13 01:18:12,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3236. [2022-07-13 01:18:12,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 2486 states have (on average 1.8125502815768302) internal successors, (4506), 3211 states have internal predecessors, (4506), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 01:18:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 4556 transitions. [2022-07-13 01:18:12,149 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 4556 transitions. Word has length 40 [2022-07-13 01:18:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:12,149 INFO L495 AbstractCegarLoop]: Abstraction has 3236 states and 4556 transitions. [2022-07-13 01:18:12,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:12,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 4556 transitions. [2022-07-13 01:18:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 01:18:12,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:12,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:12,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-07-13 01:18:12,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:12,357 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:12,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:12,358 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2022-07-13 01:18:12,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:12,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764072292] [2022-07-13 01:18:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:12,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:12,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:12,359 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) [2022-07-13 01:18:12,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-13 01:18:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:12,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:18:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:12,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:12,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764072292] [2022-07-13 01:18:12,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764072292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:12,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:12,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:18:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336993901] [2022-07-13 01:18:12,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:12,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:18:12,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:18:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:18:12,635 INFO L87 Difference]: Start difference. First operand 3236 states and 4556 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:12,742 INFO L93 Difference]: Finished difference Result 4684 states and 6375 transitions. [2022-07-13 01:18:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:18:12,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-13 01:18:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:12,746 INFO L225 Difference]: With dead ends: 4684 [2022-07-13 01:18:12,746 INFO L226 Difference]: Without dead ends: 4684 [2022-07-13 01:18:12,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:18:12,746 INFO L413 NwaCegarLoop]: 1820 mSDtfsCounter, 1180 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 3502 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:12,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 3502 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 01:18:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2022-07-13 01:18:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4020. [2022-07-13 01:18:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 3266 states have (on average 1.7988364972443356) internal successors, (5875), 3988 states have internal predecessors, (5875), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-13 01:18:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 5939 transitions. [2022-07-13 01:18:12,778 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 5939 transitions. Word has length 48 [2022-07-13 01:18:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:12,778 INFO L495 AbstractCegarLoop]: Abstraction has 4020 states and 5939 transitions. [2022-07-13 01:18:12,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 5939 transitions. [2022-07-13 01:18:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 01:18:12,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:12,779 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] [2022-07-13 01:18:12,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:12,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:12,987 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:12,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:12,988 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2022-07-13 01:18:12,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:12,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228346151] [2022-07-13 01:18:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:12,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:12,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:12,990 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) [2022-07-13 01:18:12,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-13 01:18:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:13,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:18:13,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:13,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:13,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:13,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228346151] [2022-07-13 01:18:13,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228346151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:13,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:13,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:18:13,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885164750] [2022-07-13 01:18:13,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:13,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:18:13,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:13,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:18:13,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:18:13,244 INFO L87 Difference]: Start difference. First operand 4020 states and 5939 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:13,293 INFO L93 Difference]: Finished difference Result 4959 states and 6922 transitions. [2022-07-13 01:18:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:18:13,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-13 01:18:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:13,299 INFO L225 Difference]: With dead ends: 4959 [2022-07-13 01:18:13,299 INFO L226 Difference]: Without dead ends: 4959 [2022-07-13 01:18:13,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:13,300 INFO L413 NwaCegarLoop]: 2867 mSDtfsCounter, 1755 mSDsluCounter, 3959 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 6826 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:13,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 6826 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:18:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2022-07-13 01:18:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3978. [2022-07-13 01:18:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3224 states have (on average 1.8005583126550868) internal successors, (5805), 3946 states have internal predecessors, (5805), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-13 01:18:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5869 transitions. [2022-07-13 01:18:13,338 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5869 transitions. Word has length 51 [2022-07-13 01:18:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:13,338 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 5869 transitions. [2022-07-13 01:18:13,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5869 transitions. [2022-07-13 01:18:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 01:18:13,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:13,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:13,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:13,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:13,553 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2022-07-13 01:18:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:13,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826301696] [2022-07-13 01:18:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:13,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:13,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:13,555 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) [2022-07-13 01:18:13,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-13 01:18:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:13,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:18:13,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:13,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:13,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:13,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826301696] [2022-07-13 01:18:13,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826301696] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:13,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:13,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:18:13,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479211065] [2022-07-13 01:18:13,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:13,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:18:13,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:13,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:18:13,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:18:13,794 INFO L87 Difference]: Start difference. First operand 3978 states and 5869 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:13,842 INFO L93 Difference]: Finished difference Result 4695 states and 6408 transitions. [2022-07-13 01:18:13,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:18:13,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-13 01:18:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:13,847 INFO L225 Difference]: With dead ends: 4695 [2022-07-13 01:18:13,847 INFO L226 Difference]: Without dead ends: 4695 [2022-07-13 01:18:13,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:13,848 INFO L413 NwaCegarLoop]: 2907 mSDtfsCounter, 1746 mSDsluCounter, 4048 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 6955 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:13,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 6955 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:18:13,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-07-13 01:18:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 3960. [2022-07-13 01:18:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3206 states have (on average 1.8013100436681222) internal successors, (5775), 3928 states have internal predecessors, (5775), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-13 01:18:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5839 transitions. [2022-07-13 01:18:13,903 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5839 transitions. Word has length 54 [2022-07-13 01:18:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:13,903 INFO L495 AbstractCegarLoop]: Abstraction has 3960 states and 5839 transitions. [2022-07-13 01:18:13,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5839 transitions. [2022-07-13 01:18:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 01:18:13,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:13,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:13,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:14,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:14,111 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:14,112 INFO L85 PathProgramCache]: Analyzing trace with hash -495130849, now seen corresponding path program 1 times [2022-07-13 01:18:14,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:14,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821010360] [2022-07-13 01:18:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:14,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:14,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:14,113 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) [2022-07-13 01:18:14,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-13 01:18:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:14,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 01:18:14,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:14,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 01:18:14,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 01:18:14,353 INFO L356 Elim1Store]: treesize reduction 165, result has 13.6 percent of original size [2022-07-13 01:18:14,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 36 [2022-07-13 01:18:14,379 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-13 01:18:14,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 20 [2022-07-13 01:18:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:14,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:14,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:14,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821010360] [2022-07-13 01:18:14,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821010360] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:14,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:14,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:18:14,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098299916] [2022-07-13 01:18:14,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:14,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:18:14,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:14,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:18:14,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:18:14,396 INFO L87 Difference]: Start difference. First operand 3960 states and 5839 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:15,378 INFO L93 Difference]: Finished difference Result 3926 states and 5804 transitions. [2022-07-13 01:18:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:18:15,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-13 01:18:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:15,400 INFO L225 Difference]: With dead ends: 3926 [2022-07-13 01:18:15,400 INFO L226 Difference]: Without dead ends: 3926 [2022-07-13 01:18:15,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:15,401 INFO L413 NwaCegarLoop]: 1695 mSDtfsCounter, 759 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 4259 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:15,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 4259 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 112 Unchecked, 0.9s Time] [2022-07-13 01:18:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2022-07-13 01:18:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3926. [2022-07-13 01:18:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3172 states have (on average 1.8095838587641866) internal successors, (5740), 3894 states have internal predecessors, (5740), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-13 01:18:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 5804 transitions. [2022-07-13 01:18:15,432 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 5804 transitions. Word has length 57 [2022-07-13 01:18:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:15,433 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 5804 transitions. [2022-07-13 01:18:15,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 5804 transitions. [2022-07-13 01:18:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 01:18:15,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:15,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:15,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:15,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:15,642 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:15,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:15,643 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2022-07-13 01:18:15,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:15,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192891894] [2022-07-13 01:18:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:15,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:15,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:15,645 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) [2022-07-13 01:18:15,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-13 01:18:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:15,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:18:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:16,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:16,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:16,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192891894] [2022-07-13 01:18:16,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192891894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:16,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:16,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:18:16,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101633626] [2022-07-13 01:18:16,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:16,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 01:18:16,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:16,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 01:18:16,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:18:16,054 INFO L87 Difference]: Start difference. First operand 3926 states and 5804 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:16,169 INFO L93 Difference]: Finished difference Result 5186 states and 7398 transitions. [2022-07-13 01:18:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 01:18:16,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-13 01:18:16,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:16,176 INFO L225 Difference]: With dead ends: 5186 [2022-07-13 01:18:16,176 INFO L226 Difference]: Without dead ends: 5186 [2022-07-13 01:18:16,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 01:18:16,179 INFO L413 NwaCegarLoop]: 1948 mSDtfsCounter, 870 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 3621 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:16,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 3621 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 01:18:16,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5186 states. [2022-07-13 01:18:16,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5186 to 4843. [2022-07-13 01:18:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4083 states have (on average 1.7891256429096252) internal successors, (7305), 4802 states have internal predecessors, (7305), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-13 01:18:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 7387 transitions. [2022-07-13 01:18:16,219 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 7387 transitions. Word has length 59 [2022-07-13 01:18:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:16,219 INFO L495 AbstractCegarLoop]: Abstraction has 4843 states and 7387 transitions. [2022-07-13 01:18:16,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:16,219 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 7387 transitions. [2022-07-13 01:18:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 01:18:16,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:16,220 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:16,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:16,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:16,429 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:16,430 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2022-07-13 01:18:16,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:16,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946045354] [2022-07-13 01:18:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:16,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:16,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:16,431 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) [2022-07-13 01:18:16,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-13 01:18:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:16,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 01:18:16,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:16,766 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 [2022-07-13 01:18:16,769 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 [2022-07-13 01:18:17,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 01:18:17,022 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 [2022-07-13 01:18:17,028 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 01:18:17,029 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 [2022-07-13 01:18:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:17,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:17,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:17,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946045354] [2022-07-13 01:18:17,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946045354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:17,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:17,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 01:18:17,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004160031] [2022-07-13 01:18:17,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:17,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:18:17,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:17,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:18:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:18:17,037 INFO L87 Difference]: Start difference. First operand 4843 states and 7387 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:19,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:19,913 INFO L93 Difference]: Finished difference Result 6874 states and 10400 transitions. [2022-07-13 01:18:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:18:19,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-13 01:18:19,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:19,921 INFO L225 Difference]: With dead ends: 6874 [2022-07-13 01:18:19,921 INFO L226 Difference]: Without dead ends: 6874 [2022-07-13 01:18:19,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:18:19,921 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 4069 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4083 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:19,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4083 Valid, 1047 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-13 01:18:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6874 states. [2022-07-13 01:18:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6874 to 4603. [2022-07-13 01:18:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 3927 states have (on average 1.7122485357779476) internal successors, (6724), 4562 states have internal predecessors, (6724), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-13 01:18:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 6806 transitions. [2022-07-13 01:18:19,964 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 6806 transitions. Word has length 62 [2022-07-13 01:18:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:19,964 INFO L495 AbstractCegarLoop]: Abstraction has 4603 states and 6806 transitions. [2022-07-13 01:18:19,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 6806 transitions. [2022-07-13 01:18:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 01:18:19,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:19,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:19,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:20,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:20,176 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:20,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2022-07-13 01:18:20,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:20,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256824724] [2022-07-13 01:18:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:20,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:20,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:20,179 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) [2022-07-13 01:18:20,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-13 01:18:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:20,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 01:18:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:20,440 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 [2022-07-13 01:18:20,447 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 [2022-07-13 01:18:20,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-13 01:18:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:20,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:20,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:20,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256824724] [2022-07-13 01:18:20,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256824724] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:20,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:20,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:18:20,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76691724] [2022-07-13 01:18:20,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:20,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 01:18:20,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:20,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 01:18:20,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:20,468 INFO L87 Difference]: Start difference. First operand 4603 states and 6806 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:23,034 INFO L93 Difference]: Finished difference Result 4602 states and 6803 transitions. [2022-07-13 01:18:23,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 01:18:23,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-13 01:18:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:23,039 INFO L225 Difference]: With dead ends: 4602 [2022-07-13 01:18:23,040 INFO L226 Difference]: Without dead ends: 4602 [2022-07-13 01:18:23,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 01:18:23,040 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 4 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4589 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:23,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4589 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 01:18:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-07-13 01:18:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2022-07-13 01:18:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 3927 states have (on average 1.711484593837535) internal successors, (6721), 4561 states have internal predecessors, (6721), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-13 01:18:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 6803 transitions. [2022-07-13 01:18:23,072 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 6803 transitions. Word has length 67 [2022-07-13 01:18:23,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:23,072 INFO L495 AbstractCegarLoop]: Abstraction has 4602 states and 6803 transitions. [2022-07-13 01:18:23,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 6803 transitions. [2022-07-13 01:18:23,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 01:18:23,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:23,073 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:23,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:23,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:23,283 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2022-07-13 01:18:23,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:23,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960883768] [2022-07-13 01:18:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:23,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:23,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:23,285 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) [2022-07-13 01:18:23,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-13 01:18:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:23,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 01:18:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:23,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 01:18:23,574 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 [2022-07-13 01:18:23,580 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 [2022-07-13 01:18:23,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-13 01:18:23,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 01:18:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:23,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:23,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:23,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960883768] [2022-07-13 01:18:23,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960883768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:23,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:23,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:18:23,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029235485] [2022-07-13 01:18:23,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:23,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 01:18:23,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:23,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 01:18:23,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:23,630 INFO L87 Difference]: Start difference. First operand 4602 states and 6803 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:27,187 INFO L93 Difference]: Finished difference Result 4601 states and 6800 transitions. [2022-07-13 01:18:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 01:18:27,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-13 01:18:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:27,192 INFO L225 Difference]: With dead ends: 4601 [2022-07-13 01:18:27,192 INFO L226 Difference]: Without dead ends: 4601 [2022-07-13 01:18:27,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 01:18:27,193 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 2 mSDsluCounter, 2846 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4562 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:27,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4562 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-13 01:18:27,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-07-13 01:18:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 4601. [2022-07-13 01:18:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 3924 states have (on average 1.7120285423037718) internal successors, (6718), 4560 states have internal predecessors, (6718), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-13 01:18:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 6800 transitions. [2022-07-13 01:18:27,226 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 6800 transitions. Word has length 67 [2022-07-13 01:18:27,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:27,226 INFO L495 AbstractCegarLoop]: Abstraction has 4601 states and 6800 transitions. [2022-07-13 01:18:27,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:27,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 6800 transitions. [2022-07-13 01:18:27,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 01:18:27,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:27,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:27,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:27,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:27,438 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:27,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2022-07-13 01:18:27,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:27,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935804359] [2022-07-13 01:18:27,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:27,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:27,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:27,439 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) [2022-07-13 01:18:27,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-13 01:18:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 01:18:27,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:27,715 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 [2022-07-13 01:18:27,722 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 [2022-07-13 01:18:27,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-13 01:18:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:27,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:27,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:27,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935804359] [2022-07-13 01:18:27,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935804359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:27,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:27,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:18:27,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607857914] [2022-07-13 01:18:27,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:27,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 01:18:27,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 01:18:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:27,745 INFO L87 Difference]: Start difference. First operand 4601 states and 6800 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:30,446 INFO L93 Difference]: Finished difference Result 4600 states and 6796 transitions. [2022-07-13 01:18:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 01:18:30,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-13 01:18:30,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:30,451 INFO L225 Difference]: With dead ends: 4600 [2022-07-13 01:18:30,451 INFO L226 Difference]: Without dead ends: 4600 [2022-07-13 01:18:30,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 01:18:30,452 INFO L413 NwaCegarLoop]: 1714 mSDtfsCounter, 4 mSDsluCounter, 2870 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4584 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:30,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4584 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-13 01:18:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2022-07-13 01:18:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 4600. [2022-07-13 01:18:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 3924 states have (on average 1.7110091743119267) internal successors, (6714), 4559 states have internal predecessors, (6714), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-13 01:18:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 6796 transitions. [2022-07-13 01:18:30,484 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 6796 transitions. Word has length 67 [2022-07-13 01:18:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:30,484 INFO L495 AbstractCegarLoop]: Abstraction has 4600 states and 6796 transitions. [2022-07-13 01:18:30,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 6796 transitions. [2022-07-13 01:18:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 01:18:30,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:30,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:30,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:30,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:30,694 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:30,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2022-07-13 01:18:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:30,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446544425] [2022-07-13 01:18:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:30,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:30,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:30,696 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) [2022-07-13 01:18:30,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-13 01:18:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:30,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 01:18:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:30,981 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 [2022-07-13 01:18:30,992 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 [2022-07-13 01:18:30,998 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 [2022-07-13 01:18:31,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-13 01:18:31,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 01:18:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:31,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:31,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:31,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446544425] [2022-07-13 01:18:31,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446544425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:31,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:31,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:18:31,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243116837] [2022-07-13 01:18:31,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:31,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 01:18:31,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:31,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 01:18:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:31,053 INFO L87 Difference]: Start difference. First operand 4600 states and 6796 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:34,531 INFO L93 Difference]: Finished difference Result 4599 states and 6792 transitions. [2022-07-13 01:18:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 01:18:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-13 01:18:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:34,536 INFO L225 Difference]: With dead ends: 4599 [2022-07-13 01:18:34,536 INFO L226 Difference]: Without dead ends: 4599 [2022-07-13 01:18:34,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 01:18:34,536 INFO L413 NwaCegarLoop]: 1714 mSDtfsCounter, 2 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4557 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:34,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4557 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-13 01:18:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2022-07-13 01:18:34,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4599. [2022-07-13 01:18:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 3920 states have (on average 1.711734693877551) internal successors, (6710), 4558 states have internal predecessors, (6710), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-13 01:18:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 6792 transitions. [2022-07-13 01:18:34,564 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 6792 transitions. Word has length 67 [2022-07-13 01:18:34,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:34,564 INFO L495 AbstractCegarLoop]: Abstraction has 4599 states and 6792 transitions. [2022-07-13 01:18:34,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 01:18:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 6792 transitions. [2022-07-13 01:18:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-13 01:18:34,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:34,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:34,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:34,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:34,775 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:34,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2062362287, now seen corresponding path program 1 times [2022-07-13 01:18:34,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:34,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500579445] [2022-07-13 01:18:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:34,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:34,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:34,777 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) [2022-07-13 01:18:34,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-13 01:18:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:35,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 01:18:35,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:35,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 01:18:35,062 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:35,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500579445] [2022-07-13 01:18:35,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500579445] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 01:18:35,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 01:18:35,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 01:18:35,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582397864] [2022-07-13 01:18:35,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 01:18:35,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 01:18:35,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:35,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 01:18:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 01:18:35,064 INFO L87 Difference]: Start difference. First operand 4599 states and 6792 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 01:18:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:35,113 INFO L93 Difference]: Finished difference Result 4602 states and 6801 transitions. [2022-07-13 01:18:35,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 01:18:35,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-07-13 01:18:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:35,130 INFO L225 Difference]: With dead ends: 4602 [2022-07-13 01:18:35,130 INFO L226 Difference]: Without dead ends: 4602 [2022-07-13 01:18:35,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 01:18:35,131 INFO L413 NwaCegarLoop]: 1713 mSDtfsCounter, 2 mSDsluCounter, 3418 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5131 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:35,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5131 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 01:18:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-07-13 01:18:35,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2022-07-13 01:18:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 3922 states have (on average 1.7116267210606833) internal successors, (6713), 4561 states have internal predecessors, (6713), 41 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-13 01:18:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 6801 transitions. [2022-07-13 01:18:35,174 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 6801 transitions. Word has length 75 [2022-07-13 01:18:35,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:35,175 INFO L495 AbstractCegarLoop]: Abstraction has 4602 states and 6801 transitions. [2022-07-13 01:18:35,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 01:18:35,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 6801 transitions. [2022-07-13 01:18:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-13 01:18:35,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:35,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:35,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:35,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:35,390 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:35,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1092552202, now seen corresponding path program 1 times [2022-07-13 01:18:35,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:35,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540230054] [2022-07-13 01:18:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:18:35,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:35,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:35,393 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) [2022-07-13 01:18:35,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-13 01:18:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:18:35,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 01:18:35,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:35,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:18:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:35,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:35,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540230054] [2022-07-13 01:18:35,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540230054] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 01:18:35,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 01:18:35,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-13 01:18:35,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100424006] [2022-07-13 01:18:35,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 01:18:35,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 01:18:35,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:35,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 01:18:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 01:18:35,763 INFO L87 Difference]: Start difference. First operand 4602 states and 6801 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 01:18:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:35,917 INFO L93 Difference]: Finished difference Result 4614 states and 6823 transitions. [2022-07-13 01:18:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 01:18:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2022-07-13 01:18:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:35,925 INFO L225 Difference]: With dead ends: 4614 [2022-07-13 01:18:35,925 INFO L226 Difference]: Without dead ends: 4614 [2022-07-13 01:18:35,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-07-13 01:18:35,926 INFO L413 NwaCegarLoop]: 1713 mSDtfsCounter, 15 mSDsluCounter, 6827 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8540 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:35,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8540 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 01:18:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4614 states. [2022-07-13 01:18:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4614 to 4612. [2022-07-13 01:18:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 3931 states have (on average 1.7115237852963623) internal successors, (6728), 4570 states have internal predecessors, (6728), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-13 01:18:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 6816 transitions. [2022-07-13 01:18:35,961 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 6816 transitions. Word has length 76 [2022-07-13 01:18:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:35,962 INFO L495 AbstractCegarLoop]: Abstraction has 4612 states and 6816 transitions. [2022-07-13 01:18:35,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 01:18:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 6816 transitions. [2022-07-13 01:18:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 01:18:35,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:35,963 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:35,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:36,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:36,175 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:36,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:36,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1024769937, now seen corresponding path program 2 times [2022-07-13 01:18:36,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:36,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567664059] [2022-07-13 01:18:36,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 01:18:36,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:36,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:36,177 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) [2022-07-13 01:18:36,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-13 01:18:36,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 01:18:36,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 01:18:36,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 01:18:36,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:36,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:18:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:36,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:36,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567664059] [2022-07-13 01:18:36,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567664059] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 01:18:36,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 01:18:36,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-13 01:18:36,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666496356] [2022-07-13 01:18:36,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 01:18:36,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 01:18:36,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 01:18:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-13 01:18:36,872 INFO L87 Difference]: Start difference. First operand 4612 states and 6816 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 01:18:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:37,384 INFO L93 Difference]: Finished difference Result 4633 states and 6864 transitions. [2022-07-13 01:18:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 01:18:37,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 79 [2022-07-13 01:18:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:37,391 INFO L225 Difference]: With dead ends: 4633 [2022-07-13 01:18:37,392 INFO L226 Difference]: Without dead ends: 4629 [2022-07-13 01:18:37,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2022-07-13 01:18:37,392 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 50 mSDsluCounter, 10264 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 11980 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:37,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 11980 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 01:18:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2022-07-13 01:18:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 4621. [2022-07-13 01:18:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 3940 states have (on average 1.7106598984771573) internal successors, (6740), 4579 states have internal predecessors, (6740), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-13 01:18:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 6828 transitions. [2022-07-13 01:18:37,426 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 6828 transitions. Word has length 79 [2022-07-13 01:18:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:37,426 INFO L495 AbstractCegarLoop]: Abstraction has 4621 states and 6828 transitions. [2022-07-13 01:18:37,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 01:18:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 6828 transitions. [2022-07-13 01:18:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-13 01:18:37,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:37,427 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:37,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:37,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:37,638 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:37,639 INFO L85 PathProgramCache]: Analyzing trace with hash 876217103, now seen corresponding path program 3 times [2022-07-13 01:18:37,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:37,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497861213] [2022-07-13 01:18:37,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 01:18:37,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:37,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:37,640 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) [2022-07-13 01:18:37,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-13 01:18:38,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-13 01:18:38,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 01:18:38,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 01:18:38,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:38,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:18:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:38,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:38,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497861213] [2022-07-13 01:18:38,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497861213] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 01:18:38,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 01:18:38,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-13 01:18:38,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543713826] [2022-07-13 01:18:38,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 01:18:38,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 01:18:38,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:38,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 01:18:38,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-13 01:18:38,926 INFO L87 Difference]: Start difference. First operand 4621 states and 6828 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 01:18:41,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:41,636 INFO L93 Difference]: Finished difference Result 4663 states and 6965 transitions. [2022-07-13 01:18:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 01:18:41,637 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 85 [2022-07-13 01:18:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:41,643 INFO L225 Difference]: With dead ends: 4663 [2022-07-13 01:18:41,643 INFO L226 Difference]: Without dead ends: 4657 [2022-07-13 01:18:41,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 01:18:41,644 INFO L413 NwaCegarLoop]: 1720 mSDtfsCounter, 125 mSDsluCounter, 20567 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 22287 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:41,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 22287 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 01:18:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2022-07-13 01:18:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 4639. [2022-07-13 01:18:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 3958 states have (on average 1.7086912582112177) internal successors, (6763), 4597 states have internal predecessors, (6763), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-13 01:18:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 6851 transitions. [2022-07-13 01:18:41,699 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 6851 transitions. Word has length 85 [2022-07-13 01:18:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:41,699 INFO L495 AbstractCegarLoop]: Abstraction has 4639 states and 6851 transitions. [2022-07-13 01:18:41,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 01:18:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 6851 transitions. [2022-07-13 01:18:41,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-13 01:18:41,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:41,700 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:41,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:41,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:41,901 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:41,901 INFO L85 PathProgramCache]: Analyzing trace with hash -990633905, now seen corresponding path program 4 times [2022-07-13 01:18:41,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:41,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273074019] [2022-07-13 01:18:41,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 01:18:41,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:41,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:41,903 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) [2022-07-13 01:18:41,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-13 01:18:42,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 01:18:42,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 01:18:42,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 01:18:42,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:42,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:18:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 01:18:44,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:44,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273074019] [2022-07-13 01:18:44,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273074019] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 01:18:44,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 01:18:44,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-13 01:18:44,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092845330] [2022-07-13 01:18:44,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 01:18:44,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 01:18:44,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:18:44,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 01:18:44,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-07-13 01:18:44,053 INFO L87 Difference]: Start difference. First operand 4639 states and 6851 transitions. Second operand has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 01:18:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:18:54,421 INFO L93 Difference]: Finished difference Result 4719 states and 7068 transitions. [2022-07-13 01:18:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-13 01:18:54,436 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 97 [2022-07-13 01:18:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:18:54,444 INFO L225 Difference]: With dead ends: 4719 [2022-07-13 01:18:54,444 INFO L226 Difference]: Without dead ends: 4715 [2022-07-13 01:18:54,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2022-07-13 01:18:54,447 INFO L413 NwaCegarLoop]: 1733 mSDtfsCounter, 419 mSDsluCounter, 41453 mSDsCounter, 0 mSdLazyCounter, 3046 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 43186 SdHoareTripleChecker+Invalid, 3506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 3046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-13 01:18:54,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 43186 Invalid, 3506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 3046 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-13 01:18:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2022-07-13 01:18:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 4673. [2022-07-13 01:18:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 3992 states have (on average 1.7056613226452906) internal successors, (6809), 4631 states have internal predecessors, (6809), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-13 01:18:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 6897 transitions. [2022-07-13 01:18:54,490 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 6897 transitions. Word has length 97 [2022-07-13 01:18:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:18:54,490 INFO L495 AbstractCegarLoop]: Abstraction has 4673 states and 6897 transitions. [2022-07-13 01:18:54,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 01:18:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 6897 transitions. [2022-07-13 01:18:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-13 01:18:54,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:18:54,491 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:18:54,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-13 01:18:54,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:18:54,703 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:18:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:18:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1014357521, now seen corresponding path program 5 times [2022-07-13 01:18:54,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:18:54,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203203229] [2022-07-13 01:18:54,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 01:18:54,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:18:54,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:18:54,705 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 01:18:54,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-13 01:18:55,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-13 01:18:55,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 01:18:56,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-13 01:18:56,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:18:56,017 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 [2022-07-13 01:18:56,106 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-13 01:18:56,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-13 01:18:56,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 01:18:56,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-13 01:18:57,231 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 01:18:57,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-13 01:18:57,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-13 01:18:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-13 01:18:57,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:18:57,463 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2712 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_2712) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-13 01:18:57,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:18:57,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203203229] [2022-07-13 01:18:57,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203203229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 01:18:57,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1638522863] [2022-07-13 01:18:57,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 01:18:57,465 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-13 01:18:57,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-13 01:18:57,466 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-13 01:18:57,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-13 01:20:19,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-13 01:20:19,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 01:20:19,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-13 01:20:19,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:20:19,282 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 [2022-07-13 01:20:19,360 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-13 01:20:19,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-13 01:20:19,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 01:20:19,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-13 01:20:20,372 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 01:20:20,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-13 01:20:20,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-13 01:20:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-13 01:20:20,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:20:20,570 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3175 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3175) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1))) is different from false [2022-07-13 01:20:20,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1638522863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 01:20:20,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 01:20:20,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-13 01:20:20,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327159292] [2022-07-13 01:20:20,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 01:20:20,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 01:20:20,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 01:20:20,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 01:20:20,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=10, NotChecked=38, Total=156 [2022-07-13 01:20:20,573 INFO L87 Difference]: Start difference. First operand 4673 states and 6897 transitions. Second operand has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 01:20:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 01:20:23,796 INFO L93 Difference]: Finished difference Result 6840 states and 10243 transitions. [2022-07-13 01:20:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 01:20:23,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-07-13 01:20:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 01:20:23,803 INFO L225 Difference]: With dead ends: 6840 [2022-07-13 01:20:23,803 INFO L226 Difference]: Without dead ends: 6836 [2022-07-13 01:20:23,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 141 SyntacticMatches, 92 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=43, Invalid=109, Unknown=12, NotChecked=46, Total=210 [2022-07-13 01:20:23,804 INFO L413 NwaCegarLoop]: 972 mSDtfsCounter, 1589 mSDsluCounter, 4270 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 5242 SdHoareTripleChecker+Invalid, 5916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3303 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-13 01:20:23,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1598 Valid, 5242 Invalid, 5916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2601 Invalid, 0 Unknown, 3303 Unchecked, 3.1s Time] [2022-07-13 01:20:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2022-07-13 01:20:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 4721. [2022-07-13 01:20:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4040 states have (on average 1.6967821782178218) internal successors, (6855), 4678 states have internal predecessors, (6855), 41 states have call successors, (41), 5 states have call predecessors, (41), 6 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2022-07-13 01:20:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 6943 transitions. [2022-07-13 01:20:23,848 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 6943 transitions. Word has length 119 [2022-07-13 01:20:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 01:20:23,848 INFO L495 AbstractCegarLoop]: Abstraction has 4721 states and 6943 transitions. [2022-07-13 01:20:23,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 01:20:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 6943 transitions. [2022-07-13 01:20:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-13 01:20:23,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 01:20:23,849 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 01:20:23,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-07-13 01:20:24,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-13 01:20:24,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 01:20:24,271 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2022-07-13 01:20:24,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 01:20:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1014357520, now seen corresponding path program 1 times [2022-07-13 01:20:24,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 01:20:24,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398174678] [2022-07-13 01:20:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:20:24,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 01:20:24,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 01:20:24,273 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 01:20:24,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-13 01:20:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 01:20:25,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-13 01:20:25,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 01:20:25,016 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 [2022-07-13 01:20:25,113 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 01:20:25,114 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 [2022-07-13 01:20:25,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 01:20:25,137 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 [2022-07-13 01:20:25,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 01:20:25,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-13 01:20:25,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-13 01:20:25,349 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3560 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3560))) (exists ((v_ArrVal_3559 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3559)))) is different from true [2022-07-13 01:20:25,356 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3561 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3561))) (exists ((v_ArrVal_3562 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3562))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-13 01:20:25,373 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3564 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3564) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3563 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3563) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-13 01:20:25,479 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3575 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3575) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3576 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3576)))) is different from true [2022-07-13 01:20:25,523 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3581 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3581))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3582 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3582)))) is different from true [2022-07-13 01:20:25,530 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3583 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3583))) (exists ((v_ArrVal_3584 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3584)))) is different from true [2022-07-13 01:20:25,537 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3585 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3585) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3586 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3586)))) is different from true [2022-07-13 01:20:25,562 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3589 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3589))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3590 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3590)))) is different from true [2022-07-13 01:20:25,605 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3595 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3595))) (exists ((v_ArrVal_3596 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3596) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-13 01:20:25,630 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3599 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3599))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3600 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3600) |c_#memory_$Pointer$.base|))) is different from true [2022-07-13 01:20:25,655 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3604 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3604) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3603 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3603) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-13 01:20:25,661 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3605 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3605) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3606 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3606)))) is different from true [2022-07-13 01:20:25,668 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3608 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3608) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3607 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3607) |c_#memory_$Pointer$.base|))) is different from true [2022-07-13 01:20:25,675 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3609 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3609) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3610 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3610)))) is different from true [2022-07-13 01:20:25,700 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3614 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3614) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3613 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3613) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-13 01:20:25,707 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3615 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3615) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3616 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3616)))) is different from true [2022-07-13 01:20:25,713 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3617 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3617) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_3618 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3618)))) is different from true [2022-07-13 01:20:25,739 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3621 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3621))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3622 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3622)))) is different from true [2022-07-13 01:20:25,766 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3625 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3625))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3626 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3626)))) is different from true [2022-07-13 01:20:25,773 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3627 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3627))) (exists ((v_ArrVal_3628 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3628)))) is different from true [2022-07-13 01:20:25,820 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3633 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3633))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3634 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3634)))) is different from true [2022-07-13 01:20:25,828 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3636 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3636))) (exists ((v_ArrVal_3635 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3635) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-13 01:20:25,836 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3637 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3637))) (exists ((v_ArrVal_3638 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3638)))) is different from true [2022-07-13 01:20:25,906 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 01:20:25,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-07-13 01:20:25,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-13 01:20:25,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-13 01:20:25,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 01:20:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 210 trivial. 759 not checked. [2022-07-13 01:20:26,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 01:20:26,644 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3730 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3730) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd .cse0 (_ bv20 32))))) (forall ((v_ArrVal_3730 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3729 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3730) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3729) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2022-07-13 01:20:26,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 01:20:26,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398174678] [2022-07-13 01:20:26,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398174678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 01:20:26,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [209284007] [2022-07-13 01:20:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 01:20:26,649 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-13 01:20:26,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-13 01:20:26,650 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-13 01:20:26,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process