./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-memleak_nexttime.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/memsafety/test-memleak_nexttime.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 0176377c3fa036d8b42b70bf41d842353f196a854b997aa0bf5f176a7ad1942b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:04:06,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:04:06,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:04:06,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:04:06,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:04:06,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:04:06,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:04:06,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:04:06,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:04:06,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:04:06,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:04:06,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:04:06,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:04:06,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:04:06,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:04:06,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:04:06,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:04:06,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:04:06,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:04:06,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:04:06,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:04:06,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:04:06,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:04:06,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:04:06,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:04:06,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:04:06,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:04:06,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:04:06,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:04:06,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:04:06,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:04:06,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:04:06,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:04:06,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:04:06,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:04:06,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:04:06,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:04:06,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:04:06,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:04:06,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:04:06,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:04:06,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 00:04:06,923 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:04:06,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:04:06,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:04:06,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:04:06,925 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:04:06,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:04:06,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:04:06,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:04:06,926 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:04:06,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:04:06,927 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:04:06,927 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:04:06,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:04:06,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:04:06,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:04:06,927 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:04:06,928 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:04:06,928 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:04:06,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:04:06,928 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:04:06,928 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:04:06,928 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:04:06,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:04:06,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:04:06,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:04:06,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:04:06,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:04:06,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:04:06,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 00:04:06,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 00:04:06,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:04:06,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0176377c3fa036d8b42b70bf41d842353f196a854b997aa0bf5f176a7ad1942b [2021-12-22 00:04:07,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:04:07,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:04:07,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:04:07,188 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:04:07,189 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:04:07,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-memleak_nexttime.i [2021-12-22 00:04:07,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43a624f2e/04c29aa68bae40d8bd5a2a82c70d9c43/FLAG2a4e60c09 [2021-12-22 00:04:07,605 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:04:07,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-memleak_nexttime.i [2021-12-22 00:04:07,613 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43a624f2e/04c29aa68bae40d8bd5a2a82c70d9c43/FLAG2a4e60c09 [2021-12-22 00:04:08,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43a624f2e/04c29aa68bae40d8bd5a2a82c70d9c43 [2021-12-22 00:04:08,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:04:08,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:04:08,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:04:08,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:04:08,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:04:08,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:04:08" (1/1) ... [2021-12-22 00:04:08,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a39bdf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:08, skipping insertion in model container [2021-12-22 00:04:08,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:04:08" (1/1) ... [2021-12-22 00:04:08,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:04:08,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:04:08,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:04:08,370 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-22 00:04:08,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39490845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:08, skipping insertion in model container [2021-12-22 00:04:08,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:04:08,373 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 00:04:08,374 INFO L158 Benchmark]: Toolchain (without parser) took 347.63ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 67.7MB in the beginning and 92.0MB in the end (delta: -24.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 00:04:08,376 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 98.6MB. Free memory was 55.7MB in the beginning and 55.6MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 00:04:08,377 INFO L158 Benchmark]: CACSL2BoogieTranslator took 329.25ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 67.3MB in the beginning and 92.0MB in the end (delta: -24.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 00:04:08,379 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 98.6MB. Free memory was 55.7MB in the beginning and 55.6MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 329.25ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 67.3MB in the beginning and 92.0MB in the end (delta: -24.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 643]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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/memsafety/test-memleak_nexttime.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 0176377c3fa036d8b42b70bf41d842353f196a854b997aa0bf5f176a7ad1942b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:04:09,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:04:09,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:04:10,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:04:10,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:04:10,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:04:10,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:04:10,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:04:10,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:04:10,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:04:10,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:04:10,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:04:10,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:04:10,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:04:10,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:04:10,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:04:10,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:04:10,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:04:10,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:04:10,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:04:10,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:04:10,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:04:10,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:04:10,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:04:10,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:04:10,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:04:10,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:04:10,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:04:10,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:04:10,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:04:10,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:04:10,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:04:10,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:04:10,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:04:10,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:04:10,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:04:10,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:04:10,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:04:10,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:04:10,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:04:10,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:04:10,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 00:04:10,083 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:04:10,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:04:10,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:04:10,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:04:10,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:04:10,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:04:10,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:04:10,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:04:10,086 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:04:10,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:04:10,087 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:04:10,087 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:04:10,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:04:10,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:04:10,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:04:10,088 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:04:10,088 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:04:10,088 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:04:10,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:04:10,088 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:04:10,088 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 00:04:10,089 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 00:04:10,089 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:04:10,089 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:04:10,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:04:10,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:04:10,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:04:10,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:04:10,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:04:10,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:04:10,090 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 00:04:10,090 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 00:04:10,090 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:04:10,090 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 00:04:10,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0176377c3fa036d8b42b70bf41d842353f196a854b997aa0bf5f176a7ad1942b [2021-12-22 00:04:10,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:04:10,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:04:10,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:04:10,390 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:04:10,391 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:04:10,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-memleak_nexttime.i [2021-12-22 00:04:10,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f062f608/7ec6eb3ef7b14b5dbefbc940f528b9ce/FLAG7515da029 [2021-12-22 00:04:10,834 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:04:10,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-memleak_nexttime.i [2021-12-22 00:04:10,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f062f608/7ec6eb3ef7b14b5dbefbc940f528b9ce/FLAG7515da029 [2021-12-22 00:04:11,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f062f608/7ec6eb3ef7b14b5dbefbc940f528b9ce [2021-12-22 00:04:11,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:04:11,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:04:11,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:04:11,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:04:11,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:04:11,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eada31c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11, skipping insertion in model container [2021-12-22 00:04:11,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:04:11,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:04:11,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:04:11,562 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 00:04:11,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:04:11,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:04:11,589 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:04:11,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:04:11,674 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:04:11,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11 WrapperNode [2021-12-22 00:04:11,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:04:11,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:04:11,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:04:11,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:04:11,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,727 INFO L137 Inliner]: procedures = 182, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2021-12-22 00:04:11,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:04:11,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:04:11,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:04:11,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:04:11,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:04:11,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:04:11,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:04:11,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:04:11,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11" (1/1) ... [2021-12-22 00:04:11,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:04:11,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:04:11,783 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) [2021-12-22 00:04:11,789 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 [2021-12-22 00:04:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 00:04:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 00:04:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 00:04:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 00:04:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-12-22 00:04:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:04:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 00:04:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 00:04:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 00:04:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:04:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 00:04:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 00:04:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-12-22 00:04:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:04:11,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:04:11,890 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:04:11,891 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:04:11,893 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 00:04:12,110 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:04:12,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:04:12,115 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 00:04:12,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:04:12 BoogieIcfgContainer [2021-12-22 00:04:12,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:04:12,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:04:12,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:04:12,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:04:12,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:04:11" (1/3) ... [2021-12-22 00:04:12,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbcb4d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:04:12, skipping insertion in model container [2021-12-22 00:04:12,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:11" (2/3) ... [2021-12-22 00:04:12,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbcb4d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:04:12, skipping insertion in model container [2021-12-22 00:04:12,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:04:12" (3/3) ... [2021-12-22 00:04:12,122 INFO L111 eAbstractionObserver]: Analyzing ICFG test-memleak_nexttime.i [2021-12-22 00:04:12,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:04:12,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-12-22 00:04:12,155 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:04:12,162 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 00:04:12,162 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-12-22 00:04:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 00:04:12,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:12,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 00:04:12,187 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:12,193 INFO L85 PathProgramCache]: Analyzing trace with hash 44752, now seen corresponding path program 1 times [2021-12-22 00:04:12,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:12,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183420368] [2021-12-22 00:04:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:12,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:12,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:12,221 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) [2021-12-22 00:04:12,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 00:04:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:12,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 00:04:12,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:12,504 INFO L387 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 13 treesize of output 9 [2021-12-22 00:04:12,537 INFO L353 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2021-12-22 00:04:12,538 INFO L387 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 4 case distinctions, treesize of input 20 treesize of output 32 [2021-12-22 00:04:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:12,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:04:12,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:12,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183420368] [2021-12-22 00:04:12,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183420368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:12,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:12,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:12,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668541350] [2021-12-22 00:04:12,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:12,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:04:12,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:04:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:04:12,617 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.0) 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) [2021-12-22 00:04:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:12,670 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-12-22 00:04:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:04:12,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) 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 [2021-12-22 00:04:12,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:12,677 INFO L225 Difference]: With dead ends: 33 [2021-12-22 00:04:12,677 INFO L226 Difference]: Without dead ends: 31 [2021-12-22 00:04:12,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:04:12,681 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:12,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 5 Unchecked, 0.0s Time] [2021-12-22 00:04:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-22 00:04:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-22 00:04:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-12-22 00:04:12,712 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 3 [2021-12-22 00:04:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:12,713 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-12-22 00:04:12,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) 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) [2021-12-22 00:04:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-12-22 00:04:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 00:04:12,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:12,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 00:04:12,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-22 00:04:12,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:12,921 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:12,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:12,923 INFO L85 PathProgramCache]: Analyzing trace with hash 44753, now seen corresponding path program 1 times [2021-12-22 00:04:12,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:12,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837312525] [2021-12-22 00:04:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:12,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:12,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:12,926 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) [2021-12-22 00:04:12,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 00:04:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:12,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 00:04:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:12,985 INFO L387 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 13 treesize of output 9 [2021-12-22 00:04:12,995 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-22 00:04:12,995 INFO L387 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-12-22 00:04:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:13,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:04:13,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:13,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837312525] [2021-12-22 00:04:13,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837312525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:13,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:13,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:13,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402120355] [2021-12-22 00:04:13,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:13,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:04:13,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:04:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:13,017 INFO L87 Difference]: Start difference. First operand 31 states and 33 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) [2021-12-22 00:04:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:13,054 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-22 00:04:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:04:13,054 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 [2021-12-22 00:04:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:13,055 INFO L225 Difference]: With dead ends: 30 [2021-12-22 00:04:13,055 INFO L226 Difference]: Without dead ends: 30 [2021-12-22 00:04:13,057 INFO L932 BasicCegarLoop]: 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 [2021-12-22 00:04:13,058 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:13,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 46 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:13,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-22 00:04:13,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-22 00:04:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-12-22 00:04:13,067 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 3 [2021-12-22 00:04:13,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:13,067 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-12-22 00:04:13,067 INFO L471 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) [2021-12-22 00:04:13,068 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-12-22 00:04:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 00:04:13,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:13,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 00:04:13,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-22 00:04:13,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:13,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:13,275 INFO L85 PathProgramCache]: Analyzing trace with hash 44754, now seen corresponding path program 1 times [2021-12-22 00:04:13,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:13,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289935701] [2021-12-22 00:04:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:13,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:13,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:13,282 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) [2021-12-22 00:04:13,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 00:04:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:13,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 00:04:13,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:13,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:13,412 INFO L353 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-12-22 00:04:13,412 INFO L387 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 2 case distinctions, treesize of input 19 treesize of output 39 [2021-12-22 00:04:13,421 INFO L387 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 36 treesize of output 24 [2021-12-22 00:04:13,431 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:13,432 INFO L387 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 [2021-12-22 00:04:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:13,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:04:13,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:13,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289935701] [2021-12-22 00:04:13,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289935701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:13,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:13,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:13,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067529973] [2021-12-22 00:04:13,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:13,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:04:13,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:04:13,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:04:13,502 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 4 states, 3 states have (on average 1.0) 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) [2021-12-22 00:04:13,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:13,544 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-12-22 00:04:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:04:13,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) 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 [2021-12-22 00:04:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:13,545 INFO L225 Difference]: With dead ends: 29 [2021-12-22 00:04:13,545 INFO L226 Difference]: Without dead ends: 29 [2021-12-22 00:04:13,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:13,547 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:13,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-22 00:04:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-22 00:04:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-22 00:04:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.588235294117647) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-22 00:04:13,550 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 3 [2021-12-22 00:04:13,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:13,550 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-22 00:04:13,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) 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) [2021-12-22 00:04:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-22 00:04:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 00:04:13,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:13,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 00:04:13,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:13,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:13,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:13,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:13,758 INFO L85 PathProgramCache]: Analyzing trace with hash 44755, now seen corresponding path program 1 times [2021-12-22 00:04:13,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:13,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278165688] [2021-12-22 00:04:13,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:13,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:13,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:13,760 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) [2021-12-22 00:04:13,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 00:04:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:13,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 00:04:13,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:13,804 INFO L387 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 26 treesize of output 18 [2021-12-22 00:04:13,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:13,808 INFO L387 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 9 treesize of output 11 [2021-12-22 00:04:13,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 00:04:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:13,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:04:13,821 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:13,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278165688] [2021-12-22 00:04:13,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278165688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:13,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:13,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:13,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818706998] [2021-12-22 00:04:13,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:13,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:04:13,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:13,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:04:13,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:13,823 INFO L87 Difference]: Start difference. First operand 29 states and 31 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) [2021-12-22 00:04:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:13,849 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-12-22 00:04:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:04:13,850 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 [2021-12-22 00:04:13,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:13,850 INFO L225 Difference]: With dead ends: 28 [2021-12-22 00:04:13,850 INFO L226 Difference]: Without dead ends: 28 [2021-12-22 00:04:13,850 INFO L932 BasicCegarLoop]: 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 [2021-12-22 00:04:13,851 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:13,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-22 00:04:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-22 00:04:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.625) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-22 00:04:13,854 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 3 [2021-12-22 00:04:13,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:13,854 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-22 00:04:13,854 INFO L471 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) [2021-12-22 00:04:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-22 00:04:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 00:04:13,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:13,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:13,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:14,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:14,062 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:14,062 INFO L85 PathProgramCache]: Analyzing trace with hash 658165672, now seen corresponding path program 1 times [2021-12-22 00:04:14,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:14,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908244143] [2021-12-22 00:04:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:14,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:14,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:14,070 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) [2021-12-22 00:04:14,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 00:04:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:14,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 00:04:14,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:14,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:04:14,154 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:14,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908244143] [2021-12-22 00:04:14,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908244143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:14,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:14,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:04:14,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306802002] [2021-12-22 00:04:14,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:14,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:04:14,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:14,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:04:14,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:04:14,156 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-22 00:04:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:14,193 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-12-22 00:04:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:04:14,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2021-12-22 00:04:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:14,194 INFO L225 Difference]: With dead ends: 32 [2021-12-22 00:04:14,194 INFO L226 Difference]: Without dead ends: 29 [2021-12-22 00:04:14,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:14,195 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:14,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 77 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-22 00:04:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-22 00:04:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.588235294117647) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-22 00:04:14,199 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 12 [2021-12-22 00:04:14,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:14,199 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-22 00:04:14,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-22 00:04:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-22 00:04:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 00:04:14,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:14,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:14,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:14,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:14,407 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:14,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1349907399, now seen corresponding path program 1 times [2021-12-22 00:04:14,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:14,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178840494] [2021-12-22 00:04:14,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:14,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:14,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:14,409 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) [2021-12-22 00:04:14,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 00:04:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:14,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 00:04:14,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:14,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:04:14,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:14,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178840494] [2021-12-22 00:04:14,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178840494] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:14,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:04:14,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-22 00:04:14,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116394495] [2021-12-22 00:04:14,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:14,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:04:14,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:14,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:04:14,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:14,600 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2021-12-22 00:04:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:14,706 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-12-22 00:04:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:04:14,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 13 [2021-12-22 00:04:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:14,707 INFO L225 Difference]: With dead ends: 38 [2021-12-22 00:04:14,707 INFO L226 Difference]: Without dead ends: 32 [2021-12-22 00:04:14,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:04:14,708 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:14,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 120 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-22 00:04:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-22 00:04:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.5) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:14,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-12-22 00:04:14,711 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 13 [2021-12-22 00:04:14,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:14,711 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-12-22 00:04:14,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2021-12-22 00:04:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-12-22 00:04:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 00:04:14,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:14,712 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:14,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-22 00:04:14,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:14,919 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:14,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:14,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1601039336, now seen corresponding path program 2 times [2021-12-22 00:04:14,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:14,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898729262] [2021-12-22 00:04:14,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:04:14,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:14,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:14,921 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) [2021-12-22 00:04:14,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 00:04:14,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 00:04:14,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:04:14,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 00:04:14,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 00:04:15,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:04:15,023 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:15,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898729262] [2021-12-22 00:04:15,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898729262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:15,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:15,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:04:15,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409854257] [2021-12-22 00:04:15,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:15,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:04:15,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:15,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:04:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:04:15,024 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:04:15,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:15,053 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-12-22 00:04:15,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:04:15,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-22 00:04:15,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:15,055 INFO L225 Difference]: With dead ends: 35 [2021-12-22 00:04:15,055 INFO L226 Difference]: Without dead ends: 33 [2021-12-22 00:04:15,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:04:15,055 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:15,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:15,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-22 00:04:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-22 00:04:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-22 00:04:15,058 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 16 [2021-12-22 00:04:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:15,058 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-22 00:04:15,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:04:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-22 00:04:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 00:04:15,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:15,059 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:15,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:15,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:15,268 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:15,269 INFO L85 PathProgramCache]: Analyzing trace with hash 555073211, now seen corresponding path program 1 times [2021-12-22 00:04:15,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:15,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84581395] [2021-12-22 00:04:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:15,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:15,272 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) [2021-12-22 00:04:15,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-22 00:04:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 00:04:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:15,393 INFO L387 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 [2021-12-22 00:04:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 00:04:15,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:04:15,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:15,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84581395] [2021-12-22 00:04:15,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84581395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:15,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:15,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:15,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308536137] [2021-12-22 00:04:15,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:15,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:04:15,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:15,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:04:15,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:15,400 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-22 00:04:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:15,422 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-12-22 00:04:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:04:15,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 17 [2021-12-22 00:04:15,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:15,423 INFO L225 Difference]: With dead ends: 31 [2021-12-22 00:04:15,423 INFO L226 Difference]: Without dead ends: 31 [2021-12-22 00:04:15,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:15,424 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:15,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 30 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-22 00:04:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-22 00:04:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-12-22 00:04:15,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2021-12-22 00:04:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:15,428 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-12-22 00:04:15,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-22 00:04:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-12-22 00:04:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 00:04:15,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:15,429 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:15,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:15,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:15,636 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:15,637 INFO L85 PathProgramCache]: Analyzing trace with hash 555073212, now seen corresponding path program 1 times [2021-12-22 00:04:15,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:15,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682421905] [2021-12-22 00:04:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:15,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:15,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:15,638 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) [2021-12-22 00:04:15,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-22 00:04:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 00:04:15,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:15,808 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:15,809 INFO L387 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 [2021-12-22 00:04:15,913 INFO L387 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 [2021-12-22 00:04:15,948 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-22 00:04:15,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2021-12-22 00:04:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 00:04:15,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:04:15,956 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:15,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682421905] [2021-12-22 00:04:15,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682421905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:15,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:15,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:04:15,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332013248] [2021-12-22 00:04:15,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:15,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:04:15,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:15,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:04:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:04:15,957 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-22 00:04:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:16,044 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-12-22 00:04:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:04:16,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 17 [2021-12-22 00:04:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:16,045 INFO L225 Difference]: With dead ends: 31 [2021-12-22 00:04:16,045 INFO L226 Difference]: Without dead ends: 31 [2021-12-22 00:04:16,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:16,045 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:16,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 32 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-22 00:04:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-12-22 00:04:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-12-22 00:04:16,047 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-12-22 00:04:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:16,048 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-12-22 00:04:16,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-22 00:04:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-12-22 00:04:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 00:04:16,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:16,048 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:16,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-22 00:04:16,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:16,256 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:16,257 INFO L85 PathProgramCache]: Analyzing trace with hash 555073213, now seen corresponding path program 1 times [2021-12-22 00:04:16,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:16,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352666327] [2021-12-22 00:04:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:16,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:16,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:16,259 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) [2021-12-22 00:04:16,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-22 00:04:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:16,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 00:04:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:16,392 INFO L387 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 [2021-12-22 00:04:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 00:04:16,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:04:16,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352666327] [2021-12-22 00:04:16,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352666327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:16,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:16,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:04:16,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133543477] [2021-12-22 00:04:16,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:16,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:04:16,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:04:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:16,401 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-22 00:04:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:16,420 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-12-22 00:04:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:04:16,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 17 [2021-12-22 00:04:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:16,421 INFO L225 Difference]: With dead ends: 28 [2021-12-22 00:04:16,421 INFO L226 Difference]: Without dead ends: 28 [2021-12-22 00:04:16,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:04:16,421 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:16,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:04:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-22 00:04:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-22 00:04:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-22 00:04:16,424 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2021-12-22 00:04:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:16,424 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-22 00:04:16,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-22 00:04:16,424 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-22 00:04:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 00:04:16,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:16,425 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:16,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:16,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:16,633 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:16,633 INFO L85 PathProgramCache]: Analyzing trace with hash 555073214, now seen corresponding path program 1 times [2021-12-22 00:04:16,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:16,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573241770] [2021-12-22 00:04:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:16,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:16,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:16,635 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) [2021-12-22 00:04:16,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-22 00:04:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:16,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 00:04:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:16,770 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 00:04:16,770 INFO L387 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 1 case distinctions, treesize of input 13 treesize of output 23 [2021-12-22 00:04:16,993 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 00:04:16,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 00:04:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 00:04:17,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:04:17,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:17,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573241770] [2021-12-22 00:04:17,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573241770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:04:17,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:04:17,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:04:17,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215246142] [2021-12-22 00:04:17,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:04:17,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:04:17,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:17,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:04:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:04:17,029 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-12-22 00:04:17,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:17,105 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-12-22 00:04:17,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:04:17,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 17 [2021-12-22 00:04:17,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:17,108 INFO L225 Difference]: With dead ends: 38 [2021-12-22 00:04:17,108 INFO L226 Difference]: Without dead ends: 38 [2021-12-22 00:04:17,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:04:17,108 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:17,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 13 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-12-22 00:04:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-22 00:04:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-22 00:04:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-12-22 00:04:17,111 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 17 [2021-12-22 00:04:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:17,112 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-12-22 00:04:17,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-12-22 00:04:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-12-22 00:04:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 00:04:17,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:17,113 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:17,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:17,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:17,321 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:17,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1978376583, now seen corresponding path program 1 times [2021-12-22 00:04:17,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:17,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754473818] [2021-12-22 00:04:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:17,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:17,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:17,340 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) [2021-12-22 00:04:17,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-22 00:04:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:17,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-22 00:04:17,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:17,635 INFO L353 Elim1Store]: treesize reduction 46, result has 44.6 percent of original size [2021-12-22 00:04:17,635 INFO L387 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 4 case distinctions, treesize of input 24 treesize of output 52 [2021-12-22 00:04:17,645 INFO L387 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 33 treesize of output 25 [2021-12-22 00:04:18,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:18,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-22 00:04:18,018 INFO L387 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 12 treesize of output 11 [2021-12-22 00:04:18,059 INFO L387 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 [2021-12-22 00:04:18,139 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:18,140 INFO L387 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 [2021-12-22 00:04:18,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 00:04:18,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:18,775 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-22 00:04:18,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 37 [2021-12-22 00:04:18,781 INFO L387 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 12 treesize of output 11 [2021-12-22 00:04:18,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 00:04:18,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-12-22 00:04:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 00:04:18,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:19,069 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_336 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#p~1#1.base| v_ArrVal_336) |c_~#a~0.base|) |c_~#a~0.offset|) (_ bv0 32))) is different from false [2021-12-22 00:04:19,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:19,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754473818] [2021-12-22 00:04:19,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754473818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:19,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [783548055] [2021-12-22 00:04:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:19,071 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 00:04:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 00:04:19,073 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-22 00:04:19,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-22 00:04:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:19,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-22 00:04:19,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:19,538 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:19,538 INFO L387 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 [2021-12-22 00:04:19,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:19,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-22 00:04:19,772 INFO L387 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 12 treesize of output 11 [2021-12-22 00:04:19,795 INFO L387 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 [2021-12-22 00:04:19,848 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:19,849 INFO L387 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 [2021-12-22 00:04:19,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 00:04:20,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:20,092 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-22 00:04:20,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 37 [2021-12-22 00:04:20,097 INFO L387 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 12 treesize of output 11 [2021-12-22 00:04:20,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 00:04:20,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-12-22 00:04:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 00:04:20,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:20,301 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_425 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#p~1#1.base| v_ArrVal_425) |c_~#a~0.base|) |c_~#a~0.offset|) (_ bv0 32))) is different from false [2021-12-22 00:04:20,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [783548055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:20,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:04:20,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-12-22 00:04:20,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173151991] [2021-12-22 00:04:20,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:20,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 00:04:20,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:20,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 00:04:20,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=239, Unknown=24, NotChecked=66, Total=380 [2021-12-22 00:04:20,308 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:20,542 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-12-22 00:04:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 00:04:20,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-12-22 00:04:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:20,547 INFO L225 Difference]: With dead ends: 62 [2021-12-22 00:04:20,547 INFO L226 Difference]: Without dead ends: 62 [2021-12-22 00:04:20,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 17 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=70, Invalid=367, Unknown=33, NotChecked=82, Total=552 [2021-12-22 00:04:20,548 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:20,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 101 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2021-12-22 00:04:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-22 00:04:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-12-22 00:04:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 50 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 00:04:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-12-22 00:04:20,558 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 31 [2021-12-22 00:04:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:20,558 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-12-22 00:04:20,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-12-22 00:04:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 00:04:20,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:20,560 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:20,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-12-22 00:04:20,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:20,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:20,975 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash -459313580, now seen corresponding path program 2 times [2021-12-22 00:04:20,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:20,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903779266] [2021-12-22 00:04:20,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:04:20,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:20,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:20,978 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) [2021-12-22 00:04:20,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-22 00:04:21,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 00:04:21,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:04:21,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 00:04:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 00:04:21,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 00:04:21,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:21,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903779266] [2021-12-22 00:04:21,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903779266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:04:21,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:04:21,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-22 00:04:21,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870045342] [2021-12-22 00:04:21,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:21,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:04:21,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:04:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:21,281 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 00:04:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:21,337 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-12-22 00:04:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:04:21,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-12-22 00:04:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:21,338 INFO L225 Difference]: With dead ends: 43 [2021-12-22 00:04:21,338 INFO L226 Difference]: Without dead ends: 37 [2021-12-22 00:04:21,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:04:21,339 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:21,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 125 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:04:21,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-22 00:04:21,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-22 00:04:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-12-22 00:04:21,341 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2021-12-22 00:04:21,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:21,341 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-12-22 00:04:21,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 00:04:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-12-22 00:04:21,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 00:04:21,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:21,342 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:21,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-22 00:04:21,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:21,551 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:21,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1200131997, now seen corresponding path program 1 times [2021-12-22 00:04:21,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:21,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252976421] [2021-12-22 00:04:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:21,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:21,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:21,571 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) [2021-12-22 00:04:21,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-22 00:04:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:21,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-22 00:04:21,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:21,899 INFO L353 Elim1Store]: treesize reduction 46, result has 44.6 percent of original size [2021-12-22 00:04:21,900 INFO L387 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 4 case distinctions, treesize of input 24 treesize of output 52 [2021-12-22 00:04:21,990 INFO L387 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 24 treesize of output 16 [2021-12-22 00:04:22,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:22,501 INFO L387 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 37 treesize of output 35 [2021-12-22 00:04:22,507 INFO L387 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 12 treesize of output 11 [2021-12-22 00:04:22,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:22,627 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:22,627 INFO L387 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 [2021-12-22 00:04:22,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 00:04:23,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:23,158 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-22 00:04:23,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 37 [2021-12-22 00:04:23,165 INFO L387 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 12 treesize of output 11 [2021-12-22 00:04:23,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 00:04:23,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-12-22 00:04:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 00:04:23,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:23,399 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_590 (Array (_ BitVec 32) (_ BitVec 32)))) (bvult (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#p~1#1.base| v_ArrVal_590) |c_~#a~0.base|) |c_~#a~0.offset|) |c_#StackHeapBarrier|)) is different from false [2021-12-22 00:04:23,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:23,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252976421] [2021-12-22 00:04:23,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252976421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:23,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [951277604] [2021-12-22 00:04:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:23,401 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 00:04:23,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 00:04:23,402 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-22 00:04:23,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-22 00:04:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:23,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-22 00:04:23,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:23,869 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:23,869 INFO L387 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 [2021-12-22 00:04:23,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 00:04:24,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:24,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-22 00:04:24,752 INFO L387 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 12 treesize of output 11 [2021-12-22 00:04:24,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 00:04:24,820 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 00:04:24,820 INFO L387 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 [2021-12-22 00:04:24,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 00:04:25,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:25,106 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-22 00:04:25,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 37 [2021-12-22 00:04:25,112 INFO L387 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 12 treesize of output 11 [2021-12-22 00:04:25,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 00:04:25,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-12-22 00:04:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 00:04:25,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:25,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [951277604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:25,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:04:25,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 21 [2021-12-22 00:04:25,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404893381] [2021-12-22 00:04:25,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:25,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 00:04:25,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:25,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 00:04:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=465, Unknown=58, NotChecked=46, Total=650 [2021-12-22 00:04:25,336 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:04:25,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:04:25,754 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-22 00:04:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 00:04:25,754 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-12-22 00:04:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:04:25,755 INFO L225 Difference]: With dead ends: 36 [2021-12-22 00:04:25,755 INFO L226 Difference]: Without dead ends: 36 [2021-12-22 00:04:25,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=104, Invalid=639, Unknown=73, NotChecked=54, Total=870 [2021-12-22 00:04:25,756 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:04:25,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 76 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2021-12-22 00:04:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-22 00:04:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-22 00:04:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:04:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-22 00:04:25,757 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2021-12-22 00:04:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:04:25,758 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-22 00:04:25,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 00:04:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-22 00:04:25,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 00:04:25,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:04:25,758 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:04:25,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-12-22 00:04:25,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-22 00:04:26,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:04:26,159 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:04:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:04:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1450613687, now seen corresponding path program 1 times [2021-12-22 00:04:26,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:04:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270114357] [2021-12-22 00:04:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:26,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:04:26,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:04:26,172 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) [2021-12-22 00:04:26,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-22 00:04:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:26,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-22 00:04:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:26,479 INFO L353 Elim1Store]: treesize reduction 78, result has 27.1 percent of original size [2021-12-22 00:04:26,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 55 [2021-12-22 00:04:26,524 INFO L387 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 26 treesize of output 14 [2021-12-22 00:04:27,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:27,076 INFO L387 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 39 treesize of output 35 [2021-12-22 00:04:27,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-22 00:04:27,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 33 [2021-12-22 00:04:29,274 INFO L353 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-22 00:04:29,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 54 [2021-12-22 00:04:29,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2021-12-22 00:04:34,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:34,070 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-22 00:04:34,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2021-12-22 00:04:34,077 INFO L387 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 12 treesize of output 11 [2021-12-22 00:04:34,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-12-22 00:04:34,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-12-22 00:04:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 00:04:34,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:34,560 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_772 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#p~1#1.base| v_ArrVal_772) |c_~#a~0.base|) |c_~#a~0.offset|)) (_ bv1 1))) is different from false [2021-12-22 00:04:34,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:04:34,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270114357] [2021-12-22 00:04:34,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270114357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:34,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1786761501] [2021-12-22 00:04:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:04:34,562 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 00:04:34,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 00:04:34,563 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-22 00:04:34,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-12-22 00:04:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:04:35,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-22 00:04:35,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:04:35,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:35,074 INFO L353 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-12-22 00:04:35,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 33 [2021-12-22 00:04:35,158 INFO L387 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 17 treesize of output 9 [2021-12-22 00:04:37,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:37,808 INFO L387 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 30 treesize of output 28 [2021-12-22 00:04:37,813 INFO L387 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 12 treesize of output 11 [2021-12-22 00:04:38,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:38,011 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:04:38,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 31 [2021-12-22 00:04:42,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:42,271 INFO L353 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-12-22 00:04:42,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 41 [2021-12-22 00:04:42,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-12-22 00:04:55,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:04:55,366 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-22 00:04:55,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 47 [2021-12-22 00:04:55,402 INFO L387 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 12 treesize of output 11 [2021-12-22 00:04:55,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-12-22 00:04:55,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-12-22 00:04:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 00:04:55,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:04:56,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1786761501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:04:56,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:04:56,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-12-22 00:04:56,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776231931] [2021-12-22 00:04:56,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:04:56,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 00:04:56,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 00:04:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 00:04:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1432, Unknown=64, NotChecked=78, Total=1722 [2021-12-22 00:04:56,157 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 36 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 32 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:05:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:05:08,199 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-12-22 00:05:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 00:05:08,200 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 32 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2021-12-22 00:05:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:05:08,200 INFO L225 Difference]: With dead ends: 35 [2021-12-22 00:05:08,200 INFO L226 Difference]: Without dead ends: 35 [2021-12-22 00:05:08,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=350, Invalid=3508, Unknown=178, NotChecked=124, Total=4160 [2021-12-22 00:05:08,202 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:05:08,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 126 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 117 Unchecked, 0.0s Time] [2021-12-22 00:05:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-22 00:05:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-22 00:05:08,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:05:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-22 00:05:08,204 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2021-12-22 00:05:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:05:08,204 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-22 00:05:08,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 32 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 00:05:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-22 00:05:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 00:05:08,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:05:08,205 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:05:08,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-12-22 00:05:08,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-22 00:05:08,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 00:05:08,605 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-22 00:05:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:05:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2019351264, now seen corresponding path program 1 times [2021-12-22 00:05:08,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 00:05:08,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288884272] [2021-12-22 00:05:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:08,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 00:05:08,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 00:05:08,607 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) [2021-12-22 00:05:08,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-22 00:05:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-22 00:05:08,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:05:09,057 INFO L353 Elim1Store]: treesize reduction 78, result has 27.1 percent of original size [2021-12-22 00:05:09,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 55 [2021-12-22 00:05:09,061 INFO L387 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 17 treesize of output 9 [2021-12-22 00:05:09,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:09,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:09,640 INFO L387 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 39 treesize of output 37 [2021-12-22 00:05:09,646 INFO L387 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 12 treesize of output 11 [2021-12-22 00:05:09,974 INFO L353 Elim1Store]: treesize reduction 153, result has 26.8 percent of original size [2021-12-22 00:05:09,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 139 treesize of output 168 [2021-12-22 00:05:09,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:10,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 80 [2021-12-22 00:05:10,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:10,773 INFO L353 Elim1Store]: treesize reduction 68, result has 29.9 percent of original size [2021-12-22 00:05:10,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 115 [2021-12-22 00:05:10,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-12-22 00:05:10,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 00:05:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:10,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-12-22 00:05:10,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2021-12-22 00:05:11,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:11,256 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-22 00:05:11,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 80 [2021-12-22 00:05:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 00:05:11,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:05:12,061 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_961 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#p~1#1.base| v_ArrVal_961) |c_~#a~0.base|) |c_~#a~0.offset|) (_ bv0 1)) |c_ULTIMATE.start_main_~#p~1#1.base| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2021-12-22 00:05:12,062 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 00:05:12,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288884272] [2021-12-22 00:05:12,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288884272] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:05:12,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1590544410] [2021-12-22 00:05:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:05:12,063 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-22 00:05:12,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-22 00:05:12,064 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-22 00:05:12,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-12-22 00:05:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:05:12,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-22 00:05:12,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:05:13,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:13,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:13,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:13,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:13,263 INFO L353 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2021-12-22 00:05:13,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 67 [2021-12-22 00:05:13,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-12-22 00:05:14,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:14,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:14,559 INFO L387 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 54 treesize of output 48 [2021-12-22 00:05:14,570 INFO L387 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 12 treesize of output 11 [2021-12-22 00:05:16,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:16,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:16,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:16,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:16,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:16,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:16,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:16,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:16,711 INFO L353 Elim1Store]: treesize reduction 109, result has 30.6 percent of original size [2021-12-22 00:05:16,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 131 treesize of output 160 [2021-12-22 00:05:16,749 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-22 00:05:16,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 27 [2021-12-22 00:05:17,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:17,881 INFO L353 Elim1Store]: treesize reduction 68, result has 29.9 percent of original size [2021-12-22 00:05:17,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 126 [2021-12-22 00:05:17,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-12-22 00:05:18,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 00:05:18,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:18,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-12-22 00:05:18,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2021-12-22 00:05:19,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 00:05:19,741 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-22 00:05:19,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 94