./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/list-ext3-properties/sll_shallow_copy-2.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 6b0035e4df062aac8021cee981905a3c98f2d4e312e33b913ded157af60b9640 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:07:06,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:07:06,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:07:06,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:07:06,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:07:06,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:07:06,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:07:06,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:07:06,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:07:06,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:07:06,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:07:06,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:07:06,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:07:06,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:07:06,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:07:06,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:07:06,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:07:06,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:07:06,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:07:06,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:07:06,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:07:06,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:07:06,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:07:06,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:07:06,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:07:06,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:07:06,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:07:06,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:07:06,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:07:06,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:07:06,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:07:06,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:07:06,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:07:06,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:07:06,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:07:06,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:07:06,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:07:06,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:07:06,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:07:06,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:07:06,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:07:06,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 06:07:06,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:07:06,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:07:06,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:07:06,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:07:06,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:07:06,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:07:06,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:07:06,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:07:06,715 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:07:06,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:07:06,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:07:06,716 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:07:06,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:07:06,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:07:06,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:07:06,717 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:07:06,717 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:07:06,717 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:07:06,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:07:06,717 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:07:06,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:07:06,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:07:06,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:07:06,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:07:06,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:07:06,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:07:06,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:07:06,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:07:06,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 06:07:06,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 06:07:06,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:07:06,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b0035e4df062aac8021cee981905a3c98f2d4e312e33b913ded157af60b9640 [2021-12-16 06:07:06,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:07:06,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:07:06,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:07:06,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:07:06,967 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:07:06,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i [2021-12-16 06:07:07,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b81eedf2b/2ce95cda6e76445f9a79da1131f836d4/FLAGd74411dad [2021-12-16 06:07:07,405 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:07:07,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i [2021-12-16 06:07:07,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b81eedf2b/2ce95cda6e76445f9a79da1131f836d4/FLAGd74411dad [2021-12-16 06:07:07,428 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b81eedf2b/2ce95cda6e76445f9a79da1131f836d4 [2021-12-16 06:07:07,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:07:07,431 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:07:07,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:07:07,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:07:07,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:07:07,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:07:07" (1/1) ... [2021-12-16 06:07:07,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4311e690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:07, skipping insertion in model container [2021-12-16 06:07:07,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:07:07" (1/1) ... [2021-12-16 06:07:07,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:07:07,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:07:07,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:07:07,711 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) [2021-12-16 06:07:07,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3d21e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:07, skipping insertion in model container [2021-12-16 06:07:07,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:07:07,718 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 06:07:07,719 INFO L158 Benchmark]: Toolchain (without parser) took 287.49ms. Allocated memory is still 104.9MB. Free memory was 67.4MB in the beginning and 79.0MB in the end (delta: -11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 06:07:07,719 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 104.9MB. Free memory is still 84.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:07:07,720 INFO L158 Benchmark]: CACSL2BoogieTranslator took 285.29ms. Allocated memory is still 104.9MB. Free memory was 67.2MB in the beginning and 79.0MB in the end (delta: -11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 06:07:07,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 104.9MB. Free memory is still 84.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 285.29ms. Allocated memory is still 104.9MB. Free memory was 67.2MB in the beginning and 79.0MB in the end (delta: -11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 562]: 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/list-ext3-properties/sll_shallow_copy-2.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 6b0035e4df062aac8021cee981905a3c98f2d4e312e33b913ded157af60b9640 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:07:09,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:07:09,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:07:09,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:07:09,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:07:09,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:07:09,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:07:09,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:07:09,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:07:09,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:07:09,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:07:09,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:07:09,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:07:09,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:07:09,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:07:09,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:07:09,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:07:09,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:07:09,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:07:09,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:07:09,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:07:09,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:07:09,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:07:09,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:07:09,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:07:09,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:07:09,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:07:09,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:07:09,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:07:09,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:07:09,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:07:09,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:07:09,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:07:09,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:07:09,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:07:09,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:07:09,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:07:09,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:07:09,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:07:09,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:07:09,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:07:09,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 06:07:09,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:07:09,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:07:09,438 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:07:09,438 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:07:09,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:07:09,439 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:07:09,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:07:09,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:07:09,440 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:07:09,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:07:09,441 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:07:09,441 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:07:09,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:07:09,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:07:09,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:07:09,442 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:07:09,442 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:07:09,442 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:07:09,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:07:09,442 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:07:09,442 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 06:07:09,443 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 06:07:09,443 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:07:09,443 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:07:09,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:07:09,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:07:09,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:07:09,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:07:09,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:07:09,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:07:09,444 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 06:07:09,444 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 06:07:09,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:07:09,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 06:07:09,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b0035e4df062aac8021cee981905a3c98f2d4e312e33b913ded157af60b9640 [2021-12-16 06:07:09,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:07:09,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:07:09,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:07:09,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:07:09,727 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:07:09,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i [2021-12-16 06:07:09,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203b15137/dab80ed56cf24e82818baaea9035607d/FLAG8626f232c [2021-12-16 06:07:10,224 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:07:10,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i [2021-12-16 06:07:10,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203b15137/dab80ed56cf24e82818baaea9035607d/FLAG8626f232c [2021-12-16 06:07:10,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203b15137/dab80ed56cf24e82818baaea9035607d [2021-12-16 06:07:10,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:07:10,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:07:10,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:07:10,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:07:10,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:07:10,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45839dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10, skipping insertion in model container [2021-12-16 06:07:10,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:07:10,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:07:10,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:07:10,593 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 06:07:10,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:07:10,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:07:10,624 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:07:10,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:07:10,675 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:07:10,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10 WrapperNode [2021-12-16 06:07:10,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:07:10,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:07:10,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:07:10,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:07:10,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,723 INFO L137 Inliner]: procedures = 115, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 33 [2021-12-16 06:07:10,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:07:10,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:07:10,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:07:10,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:07:10,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:07:10,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:07:10,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:07:10,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:07:10,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10" (1/1) ... [2021-12-16 06:07:10,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:07:10,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:07:10,770 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) [2021-12-16 06:07:10,782 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 [2021-12-16 06:07:10,799 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2021-12-16 06:07:10,799 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2021-12-16 06:07:10,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:07:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:07:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:07:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 06:07:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:07:10,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:07:10,896 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:07:10,903 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:07:11,107 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:07:11,112 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:07:11,113 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 06:07:11,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:07:11 BoogieIcfgContainer [2021-12-16 06:07:11,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:07:11,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:07:11,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:07:11,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:07:11,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:07:10" (1/3) ... [2021-12-16 06:07:11,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e63b1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:07:11, skipping insertion in model container [2021-12-16 06:07:11,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:07:10" (2/3) ... [2021-12-16 06:07:11,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e63b1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:07:11, skipping insertion in model container [2021-12-16 06:07:11,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:07:11" (3/3) ... [2021-12-16 06:07:11,122 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy-2.i [2021-12-16 06:07:11,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:07:11,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-12-16 06:07:11,163 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:07:11,169 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 [2021-12-16 06:07:11,169 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-12-16 06:07:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 31 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) [2021-12-16 06:07:11,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 06:07:11,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:07:11,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:07:11,188 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-16 06:07:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:07:11,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1794625018, now seen corresponding path program 1 times [2021-12-16 06:07:11,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:07:11,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253033933] [2021-12-16 06:07:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:07:11,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:07:11,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:07:11,205 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) [2021-12-16 06:07:11,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 06:07:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:07:11,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 06:07:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:07:11,332 INFO L388 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 [2021-12-16 06:07:11,546 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 06:07:11,547 INFO L388 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 15 treesize of output 20 [2021-12-16 06:07:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:07:11,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:07:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:07:11,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:07:11,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253033933] [2021-12-16 06:07:11,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253033933] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:07:11,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:07:11,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-16 06:07:11,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192073274] [2021-12-16 06:07:11,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:07:11,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 06:07:11,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:07:11,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 06:07:11,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 06:07:11,879 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 31 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 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:07:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:07:12,025 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-12-16 06:07:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:07:12,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2021-12-16 06:07:12,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:07:12,033 INFO L225 Difference]: With dead ends: 31 [2021-12-16 06:07:12,033 INFO L226 Difference]: Without dead ends: 28 [2021-12-16 06:07:12,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-16 06:07:12,037 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:07:12,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 67 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2021-12-16 06:07:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-16 06:07:12,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-16 06:07:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 24 states have internal predecessors, (24), 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) [2021-12-16 06:07:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-12-16 06:07:12,063 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 16 [2021-12-16 06:07:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:07:12,064 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-12-16 06:07:12,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:07:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-12-16 06:07:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 06:07:12,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:07:12,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:07:12,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-16 06:07:12,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:07:12,289 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-16 06:07:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:07:12,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1794625017, now seen corresponding path program 1 times [2021-12-16 06:07:12,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:07:12,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204711128] [2021-12-16 06:07:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:07:12,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:07:12,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:07:12,294 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) [2021-12-16 06:07:12,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 06:07:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:07:12,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 06:07:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:07:12,380 INFO L388 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 [2021-12-16 06:07:12,388 INFO L388 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 [2021-12-16 06:07:14,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:07:14,677 INFO L388 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 [2021-12-16 06:07:14,685 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:07:14,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-16 06:07:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:07:14,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:07:14,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:07:14,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204711128] [2021-12-16 06:07:14,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204711128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:07:14,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1118419597] [2021-12-16 06:07:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:07:14,955 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:07:14,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:07:14,967 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:07:14,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-12-16 06:07:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:07:15,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 06:07:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:07:15,056 INFO L388 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 [2021-12-16 06:07:15,063 INFO L388 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 [2021-12-16 06:07:15,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:07:15,237 INFO L388 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 [2021-12-16 06:07:15,248 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:07:15,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-16 06:07:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:07:15,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:07:15,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1118419597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:07:15,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:07:15,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-16 06:07:15,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840914329] [2021-12-16 06:07:15,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:07:15,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 06:07:15,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:07:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 06:07:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2021-12-16 06:07:15,424 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-12-16 06:07:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:07:15,581 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-12-16 06:07:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 06:07:15,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) Word has length 16 [2021-12-16 06:07:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:07:15,582 INFO L225 Difference]: With dead ends: 24 [2021-12-16 06:07:15,582 INFO L226 Difference]: Without dead ends: 24 [2021-12-16 06:07:15,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=31, Invalid=124, Unknown=1, NotChecked=0, Total=156 [2021-12-16 06:07:15,583 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:07:15,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2021-12-16 06:07:15,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-16 06:07:15,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-16 06:07:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 20 states have internal predecessors, (20), 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) [2021-12-16 06:07:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-12-16 06:07:15,589 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 16 [2021-12-16 06:07:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:07:15,589 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-12-16 06:07:15,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-12-16 06:07:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-12-16 06:07:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 06:07:15,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:07:15,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:07:15,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 06:07:15,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-12-16 06:07:15,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-16 06:07:15,997 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-16 06:07:15,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:07:15,998 INFO L85 PathProgramCache]: Analyzing trace with hash 78968552, now seen corresponding path program 1 times [2021-12-16 06:07:15,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:07:15,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652777223] [2021-12-16 06:07:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:07:15,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:07:15,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:07:16,000 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) [2021-12-16 06:07:16,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 06:07:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:07:16,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 06:07:16,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:07:16,050 INFO L388 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 [2021-12-16 06:07:16,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:07:16,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-16 06:07:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:07:16,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:07:16,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:07:16,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652777223] [2021-12-16 06:07:16,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652777223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:07:16,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:07:16,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:07:16,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163602659] [2021-12-16 06:07:16,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:07:16,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:07:16,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:07:16,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:07:16,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:07:16,108 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:07:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:07:16,206 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-12-16 06:07:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 06:07:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-16 06:07:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:07:16,207 INFO L225 Difference]: With dead ends: 23 [2021-12-16 06:07:16,207 INFO L226 Difference]: Without dead ends: 23 [2021-12-16 06:07:16,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 06:07:16,209 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:07:16,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:07:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-16 06:07:16,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-16 06:07:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 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) [2021-12-16 06:07:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-12-16 06:07:16,212 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2021-12-16 06:07:16,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:07:16,212 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-12-16 06:07:16,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:07:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-12-16 06:07:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 06:07:16,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:07:16,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:07:16,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 06:07:16,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:07:16,419 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-16 06:07:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:07:16,420 INFO L85 PathProgramCache]: Analyzing trace with hash 78968553, now seen corresponding path program 1 times [2021-12-16 06:07:16,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:07:16,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508545287] [2021-12-16 06:07:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:07:16,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:07:16,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:07:16,421 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) [2021-12-16 06:07:16,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 06:07:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:07:16,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 06:07:16,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:07:16,486 INFO L388 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 [2021-12-16 06:07:16,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:07:16,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:07:16,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-16 06:07:16,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 06:07:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:07:16,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:07:16,603 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:07:16,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508545287] [2021-12-16 06:07:16,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508545287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:07:16,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:07:16,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:07:16,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990075250] [2021-12-16 06:07:16,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:07:16,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:07:16,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:07:16,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:07:16,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:07:16,604 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:07:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:07:16,702 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-12-16 06:07:16,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 06:07:16,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-16 06:07:16,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:07:16,705 INFO L225 Difference]: With dead ends: 22 [2021-12-16 06:07:16,705 INFO L226 Difference]: Without dead ends: 22 [2021-12-16 06:07:16,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 06:07:16,706 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:07:16,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:07:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-16 06:07:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-16 06:07:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 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) [2021-12-16 06:07:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-12-16 06:07:16,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2021-12-16 06:07:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:07:16,709 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-12-16 06:07:16,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:07:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-12-16 06:07:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 06:07:16,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:07:16,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:07:16,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 06:07:16,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:07:16,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-16 06:07:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:07:16,913 INFO L85 PathProgramCache]: Analyzing trace with hash 570997579, now seen corresponding path program 1 times [2021-12-16 06:07:16,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:07:16,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512031696] [2021-12-16 06:07:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:07:16,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:07:16,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:07:16,914 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) [2021-12-16 06:07:16,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 06:07:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:07:16,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 06:07:16,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:07:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:07:17,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:07:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 06:07:17,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:07:17,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512031696] [2021-12-16 06:07:17,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512031696] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:07:17,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:07:17,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-12-16 06:07:17,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283356876] [2021-12-16 06:07:17,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:07:17,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 06:07:17,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:07:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 06:07:17,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-16 06:07:17,312 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 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) [2021-12-16 06:07:17,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:07:17,421 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-12-16 06:07:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 06:07:17,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 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 23 [2021-12-16 06:07:17,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:07:17,422 INFO L225 Difference]: With dead ends: 22 [2021-12-16 06:07:17,422 INFO L226 Difference]: Without dead ends: 22 [2021-12-16 06:07:17,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-16 06:07:17,423 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:07:17,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 37 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2021-12-16 06:07:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-16 06:07:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-12-16 06:07:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.0) internal successors, (17), 17 states have internal predecessors, (17), 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) [2021-12-16 06:07:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-12-16 06:07:17,425 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 23 [2021-12-16 06:07:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:07:17,425 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-12-16 06:07:17,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 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) [2021-12-16 06:07:17,426 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-12-16 06:07:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 06:07:17,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:07:17,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:07:17,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 06:07:17,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:07:17,632 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-16 06:07:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:07:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1027138706, now seen corresponding path program 1 times [2021-12-16 06:07:17,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:07:17,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175329642] [2021-12-16 06:07:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:07:17,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:07:17,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:07:17,634 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) [2021-12-16 06:07:17,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 06:07:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 06:07:17,689 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 06:07:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 06:07:17,729 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-16 06:07:17,729 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-16 06:07:17,730 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (11 of 12 remaining) [2021-12-16 06:07:17,731 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (10 of 12 remaining) [2021-12-16 06:07:17,732 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (9 of 12 remaining) [2021-12-16 06:07:17,732 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (8 of 12 remaining) [2021-12-16 06:07:17,732 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (7 of 12 remaining) [2021-12-16 06:07:17,732 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (6 of 12 remaining) [2021-12-16 06:07:17,732 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (5 of 12 remaining) [2021-12-16 06:07:17,732 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (4 of 12 remaining) [2021-12-16 06:07:17,732 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (3 of 12 remaining) [2021-12-16 06:07:17,732 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (2 of 12 remaining) [2021-12-16 06:07:17,732 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE (1 of 12 remaining) [2021-12-16 06:07:17,732 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (0 of 12 remaining) [2021-12-16 06:07:17,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 06:07:17,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:07:17,935 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-12-16 06:07:17,937 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-16 06:07:17,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 06:07:17 BoogieIcfgContainer [2021-12-16 06:07:17,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-16 06:07:17,954 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 06:07:17,954 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 06:07:17,954 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 06:07:17,954 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:07:11" (3/4) ... [2021-12-16 06:07:17,956 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-16 06:07:17,956 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 06:07:17,957 INFO L158 Benchmark]: Toolchain (without parser) took 7705.86ms. Allocated memory was 67.1MB in the beginning and 83.9MB in the end (delta: 16.8MB). Free memory was 45.4MB in the beginning and 47.7MB in the end (delta: -2.4MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2021-12-16 06:07:17,957 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory was 47.8MB in the beginning and 47.7MB in the end (delta: 31.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:07:17,957 INFO L158 Benchmark]: CACSL2BoogieTranslator took 424.63ms. Allocated memory is still 67.1MB. Free memory was 45.1MB in the beginning and 40.1MB in the end (delta: 5.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 06:07:17,957 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.03ms. Allocated memory is still 67.1MB. Free memory was 40.1MB in the beginning and 38.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 06:07:17,958 INFO L158 Benchmark]: Boogie Preprocessor took 21.90ms. Allocated memory is still 67.1MB. Free memory was 38.2MB in the beginning and 37.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 06:07:17,958 INFO L158 Benchmark]: RCFGBuilder took 367.59ms. Allocated memory is still 67.1MB. Free memory was 36.9MB in the beginning and 43.3MB in the end (delta: -6.4MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2021-12-16 06:07:17,958 INFO L158 Benchmark]: TraceAbstraction took 6836.36ms. Allocated memory was 67.1MB in the beginning and 83.9MB in the end (delta: 16.8MB). Free memory was 42.8MB in the beginning and 47.7MB in the end (delta: -4.9MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2021-12-16 06:07:17,958 INFO L158 Benchmark]: Witness Printer took 2.71ms. Allocated memory is still 83.9MB. Free memory is still 47.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:07:17,960 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory was 47.8MB in the beginning and 47.7MB in the end (delta: 31.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 424.63ms. Allocated memory is still 67.1MB. Free memory was 45.1MB in the beginning and 40.1MB in the end (delta: 5.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.03ms. Allocated memory is still 67.1MB. Free memory was 40.1MB in the beginning and 38.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.90ms. Allocated memory is still 67.1MB. Free memory was 38.2MB in the beginning and 37.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 367.59ms. Allocated memory is still 67.1MB. Free memory was 36.9MB in the beginning and 43.3MB in the end (delta: -6.4MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. * TraceAbstraction took 6836.36ms. Allocated memory was 67.1MB in the beginning and 83.9MB in the end (delta: 16.8MB). Free memory was 42.8MB in the beginning and 47.7MB in the end (delta: -4.9MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * Witness Printer took 2.71ms. Allocated memory is still 83.9MB. Free memory is still 47.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 568]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 568. Possible FailurePath: [L569] CALL, EXPR alloc_node() [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); [L563] COND FALSE !(((void *)0) == temp) VAL [temp={1:0}] [L566] return temp; VAL [\result={1:0}, temp={1:0}] [L569] RET, EXPR alloc_node() VAL [alloc_node()={1:0}] [L569] struct node* s = alloc_node(); [L570] CALL, EXPR alloc_node() [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); [L563] COND FALSE !(((void *)0) == temp) VAL [temp={2:0}] [L566] return temp; VAL [\result={2:0}, temp={2:0}] [L570] RET, EXPR alloc_node() VAL [alloc_node()={2:0}, s={1:0}] [L570] s->next = alloc_node() VAL [alloc_node()={2:0}, s={1:0}] [L571] EXPR s->next VAL [s={1:0}, s->next={2:0}] [L571] *s = *(s->next) VAL [*s = *(s->next)={0:0}, s={1:0}, s->next={2:0}] [L572] free(s) VAL [s={1:0}] [L572] free(s) VAL [s={1:0}] [L572] free(s) [L573] return 0; VAL [\result=0, s={1:0}] - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 35 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 6.8s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 74 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 73 mSDsluCounter, 255 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 60 IncrementalHoareTripleChecker+Unchecked, 188 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 356 IncrementalHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 67 mSDtfsCounter, 356 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 100 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 140 ConstructedInterpolants, 22 QuantifiedInterpolants, 1022 SizeOfPredicates, 22 NumberOfNonLiveVariables, 363 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 16/40 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-16 06:07:18,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample