./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.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 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:54:36,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:54:36,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:54:36,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:54:36,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:54:36,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:54:36,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:54:36,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:54:36,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:54:36,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:54:36,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:54:36,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:54:36,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:54:36,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:54:36,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:54:36,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:54:36,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:54:36,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:54:36,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:54:36,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:54:36,519 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:54:36,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:54:36,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:54:36,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:54:36,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:54:36,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:54:36,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:54:36,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:54:36,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:54:36,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:54:36,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:54:36,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:54:36,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:54:36,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:54:36,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:54:36,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:54:36,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:54:36,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:54:36,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:54:36,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:54:36,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:54:36,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:54:36,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:54:36,558 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:54:36,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:54:36,558 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:54:36,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:54:36,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:54:36,559 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:54:36,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:54:36,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:54:36,560 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:54:36,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:54:36,561 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:54:36,561 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:54:36,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:54:36,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:54:36,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:54:36,562 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:54:36,562 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:54:36,562 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:54:36,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:54:36,562 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:54:36,563 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:54:36,563 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:54:36,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:54:36,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:54:36,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:54:36,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:54:36,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:54:36,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:54:36,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:54:36,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:54:36,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f [2022-07-12 18:54:36,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:54:36,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:54:36,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:54:36,824 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:54:36,824 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:54:36,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2022-07-12 18:54:36,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb06928a/55e646b074d74764a0ce3a8d7d8d35cc/FLAG6b451994e [2022-07-12 18:54:37,279 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:54:37,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2022-07-12 18:54:37,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb06928a/55e646b074d74764a0ce3a8d7d8d35cc/FLAG6b451994e [2022-07-12 18:54:37,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb06928a/55e646b074d74764a0ce3a8d7d8d35cc [2022-07-12 18:54:37,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:54:37,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:54:37,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:54:37,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:54:37,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:54:37,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:54:37" (1/1) ... [2022-07-12 18:54:37,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7193c330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:37, skipping insertion in model container [2022-07-12 18:54:37,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:54:37" (1/1) ... [2022-07-12 18:54:37,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:54:37,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:54:38,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:54:38,011 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-12 18:54:38,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e6a7e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:38, skipping insertion in model container [2022-07-12 18:54:38,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:54:38,012 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 18:54:38,014 INFO L158 Benchmark]: Toolchain (without parser) took 358.45ms. Allocated memory was 88.1MB in the beginning and 121.6MB in the end (delta: 33.6MB). Free memory was 50.6MB in the beginning and 92.2MB in the end (delta: -41.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 18:54:38,015 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory was 58.3MB in the beginning and 58.3MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:54:38,016 INFO L158 Benchmark]: CACSL2BoogieTranslator took 356.83ms. Allocated memory was 88.1MB in the beginning and 121.6MB in the end (delta: 33.6MB). Free memory was 50.4MB in the beginning and 92.2MB in the end (delta: -41.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 18:54:38,017 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory was 58.3MB in the beginning and 58.3MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 356.83ms. Allocated memory was 88.1MB in the beginning and 121.6MB in the end (delta: 33.6MB). Free memory was 50.4MB in the beginning and 92.2MB in the end (delta: -41.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.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 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:54:39,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:54:39,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:54:39,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:54:39,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:54:39,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:54:39,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:54:39,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:54:39,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:54:39,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:54:39,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:54:39,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:54:39,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:54:39,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:54:39,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:54:39,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:54:39,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:54:39,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:54:39,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:54:39,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:54:39,605 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:54:39,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:54:39,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:54:39,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:54:39,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:54:39,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:54:39,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:54:39,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:54:39,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:54:39,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:54:39,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:54:39,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:54:39,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:54:39,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:54:39,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:54:39,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:54:39,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:54:39,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:54:39,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:54:39,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:54:39,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:54:39,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:54:39,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 18:54:39,652 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:54:39,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:54:39,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:54:39,653 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:54:39,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:54:39,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:54:39,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:54:39,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:54:39,655 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:54:39,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:54:39,656 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:54:39,656 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:54:39,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:54:39,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:54:39,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:54:39,657 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:54:39,657 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:54:39,657 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:54:39,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:54:39,657 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:54:39,657 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:54:39,657 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:54:39,658 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:54:39,658 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:54:39,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:54:39,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:54:39,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:54:39,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:54:39,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:54:39,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:54:39,659 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:54:39,659 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:54:39,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:54:39,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f [2022-07-12 18:54:39,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:54:39,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:54:39,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:54:39,958 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:54:39,958 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:54:39,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2022-07-12 18:54:40,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d1957d12/56f241a4564c4b0a9a08bed94eb77afc/FLAG9f98b9d70 [2022-07-12 18:54:40,446 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:54:40,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2022-07-12 18:54:40,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d1957d12/56f241a4564c4b0a9a08bed94eb77afc/FLAG9f98b9d70 [2022-07-12 18:54:40,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d1957d12/56f241a4564c4b0a9a08bed94eb77afc [2022-07-12 18:54:40,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:54:40,790 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:54:40,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:54:40,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:54:40,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:54:40,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:54:40" (1/1) ... [2022-07-12 18:54:40,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520eb55d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:40, skipping insertion in model container [2022-07-12 18:54:40,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:54:40" (1/1) ... [2022-07-12 18:54:40,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:54:40,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:54:41,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:54:41,192 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:54:41,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:54:41,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:54:41,236 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:54:41,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:54:41,301 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:54:41,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41 WrapperNode [2022-07-12 18:54:41,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:54:41,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:54:41,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:54:41,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:54:41,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41" (1/1) ... [2022-07-12 18:54:41,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41" (1/1) ... [2022-07-12 18:54:41,353 INFO L137 Inliner]: procedures = 171, calls = 87, calls flagged for inlining = 25, calls inlined = 7, statements flattened = 76 [2022-07-12 18:54:41,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:54:41,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:54:41,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:54:41,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:54:41,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41" (1/1) ... [2022-07-12 18:54:41,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41" (1/1) ... [2022-07-12 18:54:41,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41" (1/1) ... [2022-07-12 18:54:41,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41" (1/1) ... [2022-07-12 18:54:41,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41" (1/1) ... [2022-07-12 18:54:41,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41" (1/1) ... [2022-07-12 18:54:41,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41" (1/1) ... [2022-07-12 18:54:41,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:54:41,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:54:41,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:54:41,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:54:41,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41" (1/1) ... [2022-07-12 18:54:41,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:54:41,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:54:41,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 18:54:41,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 18:54:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure f19_undo [2022-07-12 18:54:41,473 INFO L138 BoogieDeclarations]: Found implementation of procedure f19_undo [2022-07-12 18:54:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-12 18:54:41,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-12 18:54:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:54:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:54:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:54:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:54:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:54:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:54:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:54:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:54:41,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:54:41,549 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:54:41,550 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:54:41,776 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:54:41,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:54:41,781 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 18:54:41,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:54:41 BoogieIcfgContainer [2022-07-12 18:54:41,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:54:41,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:54:41,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:54:41,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:54:41,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:54:40" (1/3) ... [2022-07-12 18:54:41,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724422df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:54:41, skipping insertion in model container [2022-07-12 18:54:41,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:54:41" (2/3) ... [2022-07-12 18:54:41,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724422df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:54:41, skipping insertion in model container [2022-07-12 18:54:41,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:54:41" (3/3) ... [2022-07-12 18:54:41,788 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test19-2.i [2022-07-12 18:54:41,803 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:54:41,804 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-07-12 18:54:41,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:54:41,854 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@624c3993, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@36ff11c8 [2022-07-12 18:54:41,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-07-12 18:54:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:54:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:54:41,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:41,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:41,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:41,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1461209413, now seen corresponding path program 1 times [2022-07-12 18:54:41,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:41,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138731622] [2022-07-12 18:54:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:41,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:41,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:41,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:41,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 18:54:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:41,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:54:41,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:42,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:54:42,125 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:54:42,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-12 18:54:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:42,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:42,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:42,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138731622] [2022-07-12 18:54:42,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138731622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:42,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:42,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:54:42,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757363530] [2022-07-12 18:54:42,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:42,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:54:42,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:54:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:54:42,175 INFO L87 Difference]: Start difference. First operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:54:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:42,350 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2022-07-12 18:54:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:54:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2022-07-12 18:54:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:42,361 INFO L225 Difference]: With dead ends: 98 [2022-07-12 18:54:42,361 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 18:54:42,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:54:42,368 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 51 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:42,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 207 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-07-12 18:54:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 18:54:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2022-07-12 18:54:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 68 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:54:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-07-12 18:54:42,409 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 8 [2022-07-12 18:54:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:42,410 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-07-12 18:54:42,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:54:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-07-12 18:54:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:54:42,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:42,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:42,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-12 18:54:42,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:42,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:42,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1461209414, now seen corresponding path program 1 times [2022-07-12 18:54:42,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:42,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319268264] [2022-07-12 18:54:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:42,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:42,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:42,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:42,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 18:54:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:42,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:54:42,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:42,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:54:42,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:54:44,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:44,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:54:44,842 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:44,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:44,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:44,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:44,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319268264] [2022-07-12 18:54:44,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319268264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:44,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:44,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:54:44,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941286245] [2022-07-12 18:54:44,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:44,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:54:44,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:54:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2022-07-12 18:54:44,863 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:54:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:45,032 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2022-07-12 18:54:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:54:45,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2022-07-12 18:54:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:45,033 INFO L225 Difference]: With dead ends: 120 [2022-07-12 18:54:45,033 INFO L226 Difference]: Without dead ends: 120 [2022-07-12 18:54:45,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2022-07-12 18:54:45,034 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 105 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:45,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 211 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 106 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-07-12 18:54:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-12 18:54:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2022-07-12 18:54:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 69 states have internal predecessors, (82), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 18:54:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2022-07-12 18:54:45,040 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 8 [2022-07-12 18:54:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:45,041 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2022-07-12 18:54:45,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:54:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2022-07-12 18:54:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:54:45,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:45,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:45,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:45,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:45,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:45,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1807662222, now seen corresponding path program 1 times [2022-07-12 18:54:45,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:45,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598904980] [2022-07-12 18:54:45,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:45,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:45,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:45,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:45,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 18:54:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:45,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:54:45,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:45,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:54:45,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-07-12 18:54:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:45,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:45,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:45,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598904980] [2022-07-12 18:54:45,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598904980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:45,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:45,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:54:45,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123217392] [2022-07-12 18:54:45,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:45,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:54:45,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:45,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:54:45,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:54:45,349 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:54:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:45,455 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2022-07-12 18:54:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:54:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-12 18:54:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:45,456 INFO L225 Difference]: With dead ends: 86 [2022-07-12 18:54:45,456 INFO L226 Difference]: Without dead ends: 86 [2022-07-12 18:54:45,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:54:45,457 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 4 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:45,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 320 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:54:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-12 18:54:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-07-12 18:54:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 72 states have internal predecessors, (86), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 18:54:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2022-07-12 18:54:45,463 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 15 [2022-07-12 18:54:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:45,464 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2022-07-12 18:54:45,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:54:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2022-07-12 18:54:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:54:45,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:45,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:45,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:45,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:45,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:45,691 INFO L85 PathProgramCache]: Analyzing trace with hash 690353715, now seen corresponding path program 1 times [2022-07-12 18:54:45,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:45,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054553868] [2022-07-12 18:54:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:45,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:45,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:45,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:45,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 18:54:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:45,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:54:45,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:45,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:45,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:45,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054553868] [2022-07-12 18:54:45,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054553868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:45,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:45,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:54:45,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580623056] [2022-07-12 18:54:45,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:45,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:54:45,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:45,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:54:45,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:54:45,797 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:54:45,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:45,834 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-07-12 18:54:45,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:54:45,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-12 18:54:45,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:45,837 INFO L225 Difference]: With dead ends: 88 [2022-07-12 18:54:45,837 INFO L226 Difference]: Without dead ends: 88 [2022-07-12 18:54:45,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:54:45,838 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 25 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:45,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 251 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:54:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-12 18:54:45,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-07-12 18:54:45,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 75 states have internal predecessors, (89), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 18:54:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2022-07-12 18:54:45,842 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 15 [2022-07-12 18:54:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:45,842 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2022-07-12 18:54:45,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:54:45,843 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2022-07-12 18:54:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:54:45,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:45,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:45,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:46,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:46,050 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash 891124571, now seen corresponding path program 1 times [2022-07-12 18:54:46,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:46,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531162982] [2022-07-12 18:54:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:46,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:46,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:46,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 18:54:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:46,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:54:46,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:46,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:54:46,182 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:54:46,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-12 18:54:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:46,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:46,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:46,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531162982] [2022-07-12 18:54:46,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531162982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:46,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:46,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:54:46,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815722764] [2022-07-12 18:54:46,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:46,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:54:46,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:46,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:54:46,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:54:46,197 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-07-12 18:54:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:46,352 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2022-07-12 18:54:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:54:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2022-07-12 18:54:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:46,353 INFO L225 Difference]: With dead ends: 118 [2022-07-12 18:54:46,353 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 18:54:46,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:54:46,354 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 80 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:46,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 244 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-07-12 18:54:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 18:54:46,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 82. [2022-07-12 18:54:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 73 states have internal predecessors, (85), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 18:54:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2022-07-12 18:54:46,359 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 17 [2022-07-12 18:54:46,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:46,359 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2022-07-12 18:54:46,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-07-12 18:54:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2022-07-12 18:54:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:54:46,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:46,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:46,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:46,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:46,560 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:46,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:46,561 INFO L85 PathProgramCache]: Analyzing trace with hash 891124572, now seen corresponding path program 1 times [2022-07-12 18:54:46,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:46,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360967204] [2022-07-12 18:54:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:46,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:46,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:46,562 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:46,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 18:54:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:54:46,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:46,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:54:46,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:46,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:54:46,745 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:54:46,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:54:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:46,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:46,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:46,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360967204] [2022-07-12 18:54:46,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360967204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:46,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:46,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:54:46,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68610782] [2022-07-12 18:54:46,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:46,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:54:46,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:46,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:54:46,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:54:46,765 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-07-12 18:54:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:47,070 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2022-07-12 18:54:47,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:54:47,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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 17 [2022-07-12 18:54:47,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:47,071 INFO L225 Difference]: With dead ends: 148 [2022-07-12 18:54:47,071 INFO L226 Difference]: Without dead ends: 148 [2022-07-12 18:54:47,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:54:47,072 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 154 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:47,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 304 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 205 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-07-12 18:54:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-12 18:54:47,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 80. [2022-07-12 18:54:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 71 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 18:54:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-07-12 18:54:47,077 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 17 [2022-07-12 18:54:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:47,077 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-07-12 18:54:47,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-07-12 18:54:47,077 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-07-12 18:54:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:54:47,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:47,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:47,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:47,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:47,293 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:47,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2005389781, now seen corresponding path program 1 times [2022-07-12 18:54:47,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:47,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837079787] [2022-07-12 18:54:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:47,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:47,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:47,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:47,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 18:54:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:54:47,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:47,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:47,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837079787] [2022-07-12 18:54:47,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837079787] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:47,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:47,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:54:47,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493312411] [2022-07-12 18:54:47,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:47,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:54:47,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:47,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:54:47,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:54:47,440 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:54:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:47,494 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2022-07-12 18:54:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:54:47,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-12 18:54:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:47,495 INFO L225 Difference]: With dead ends: 84 [2022-07-12 18:54:47,495 INFO L226 Difference]: Without dead ends: 78 [2022-07-12 18:54:47,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:54:47,496 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:47,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2022-07-12 18:54:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-12 18:54:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-07-12 18:54:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.489795918367347) internal successors, (73), 65 states have internal predecessors, (73), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 18:54:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-12 18:54:47,500 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 17 [2022-07-12 18:54:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:47,500 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-12 18:54:47,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:54:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-12 18:54:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:54:47,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:47,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:47,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:47,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:47,710 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:47,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1867537779, now seen corresponding path program 1 times [2022-07-12 18:54:47,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:47,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288543165] [2022-07-12 18:54:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:47,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:47,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:47,712 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:47,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 18:54:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:47,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:54:47,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:54:47,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:47,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:47,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288543165] [2022-07-12 18:54:47,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288543165] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:47,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:47,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:54:47,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583703029] [2022-07-12 18:54:47,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:47,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:54:47,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:54:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:54:47,790 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:54:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:47,815 INFO L93 Difference]: Finished difference Result 138 states and 157 transitions. [2022-07-12 18:54:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:54:47,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-07-12 18:54:47,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:47,817 INFO L225 Difference]: With dead ends: 138 [2022-07-12 18:54:47,817 INFO L226 Difference]: Without dead ends: 138 [2022-07-12 18:54:47,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:54:47,818 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 90 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:47,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 205 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:54:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-12 18:54:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 77. [2022-07-12 18:54:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 69 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 18:54:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-07-12 18:54:47,829 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 23 [2022-07-12 18:54:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:47,829 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-07-12 18:54:47,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:54:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-07-12 18:54:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:54:47,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:47,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:47,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:48,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:48,041 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:48,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:48,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1867478197, now seen corresponding path program 1 times [2022-07-12 18:54:48,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:48,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420006266] [2022-07-12 18:54:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:48,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:48,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:48,043 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:48,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 18:54:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:48,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:54:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:48,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:54:48,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 18:54:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:54:48,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:48,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:48,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420006266] [2022-07-12 18:54:48,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420006266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:48,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:48,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:54:48,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132150571] [2022-07-12 18:54:48,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:48,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:54:48,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:48,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:54:48,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:54:48,152 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-07-12 18:54:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:48,221 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-07-12 18:54:48,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:54:48,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 23 [2022-07-12 18:54:48,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:48,223 INFO L225 Difference]: With dead ends: 100 [2022-07-12 18:54:48,223 INFO L226 Difference]: Without dead ends: 100 [2022-07-12 18:54:48,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:54:48,223 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 33 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:48,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 298 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:54:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-12 18:54:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2022-07-12 18:54:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 66 states have internal predecessors, (73), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 18:54:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-07-12 18:54:48,226 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 23 [2022-07-12 18:54:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:48,226 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-07-12 18:54:48,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-07-12 18:54:48,226 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-07-12 18:54:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:54:48,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:48,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:48,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:48,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:48,428 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:48,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:48,428 INFO L85 PathProgramCache]: Analyzing trace with hash 440766702, now seen corresponding path program 1 times [2022-07-12 18:54:48,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:48,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958733541] [2022-07-12 18:54:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:48,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:48,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:48,429 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:48,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 18:54:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:48,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:54:48,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:48,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:54:48,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:48,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:54:48,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:54:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:48,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:50,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:50,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958733541] [2022-07-12 18:54:50,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958733541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:50,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [896456277] [2022-07-12 18:54:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:50,197 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:54:50,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:54:50,198 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:54:50,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-07-12 18:54:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:50,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:54:50,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:50,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:54:50,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:50,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:54:50,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:54:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:50,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:51,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [896456277] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:51,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:51,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-12 18:54:51,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986377226] [2022-07-12 18:54:51,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:51,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:54:51,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:51,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:54:51,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2022-07-12 18:54:51,826 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-07-12 18:54:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:51,927 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-07-12 18:54:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:54:51,928 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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 24 [2022-07-12 18:54:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:51,928 INFO L225 Difference]: With dead ends: 103 [2022-07-12 18:54:51,928 INFO L226 Difference]: Without dead ends: 103 [2022-07-12 18:54:51,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=49, Invalid=132, Unknown=1, NotChecked=0, Total=182 [2022-07-12 18:54:51,929 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 111 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:51,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 318 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-07-12 18:54:51,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-12 18:54:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2022-07-12 18:54:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 70 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:54:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2022-07-12 18:54:51,932 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 24 [2022-07-12 18:54:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:51,932 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2022-07-12 18:54:51,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-07-12 18:54:51,932 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2022-07-12 18:54:51,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:54:51,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:51,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:51,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:52,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:52,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:54:52,334 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash 778865962, now seen corresponding path program 1 times [2022-07-12 18:54:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:52,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299334847] [2022-07-12 18:54:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:52,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:52,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:52,336 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:52,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 18:54:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:52,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:54:52,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:52,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:54:52,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:52,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2022-07-12 18:54:52,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-07-12 18:54:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:52,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:52,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:52,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299334847] [2022-07-12 18:54:52,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299334847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:52,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1350211380] [2022-07-12 18:54:52,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:52,850 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:54:52,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:54:52,851 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:54:52,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-12 18:54:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:52,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:54:52,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:53,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:54:55,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:55,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:54:55,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:54:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:55,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:55,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1350211380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:55,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:54:55,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-07-12 18:54:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040517137] [2022-07-12 18:54:55,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:54:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:54:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:54:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=256, Unknown=1, NotChecked=0, Total=342 [2022-07-12 18:54:55,362 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 17 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:54:55,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:55,816 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2022-07-12 18:54:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:54:55,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-07-12 18:54:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:55,817 INFO L225 Difference]: With dead ends: 141 [2022-07-12 18:54:55,817 INFO L226 Difference]: Without dead ends: 141 [2022-07-12 18:54:55,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=177, Invalid=578, Unknown=1, NotChecked=0, Total=756 [2022-07-12 18:54:55,818 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 247 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:55,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 276 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 164 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-07-12 18:54:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-12 18:54:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2022-07-12 18:54:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.4) internal successors, (77), 69 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:54:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2022-07-12 18:54:55,821 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 25 [2022-07-12 18:54:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:55,822 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2022-07-12 18:54:55,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:54:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2022-07-12 18:54:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:54:55,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:55,825 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:55,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-07-12 18:54:56,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:56,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:56,227 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:56,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:56,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1765484354, now seen corresponding path program 1 times [2022-07-12 18:54:56,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:56,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530244263] [2022-07-12 18:54:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:56,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:56,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:56,229 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:56,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 18:54:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:56,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:54:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:54:56,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:56,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:56,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530244263] [2022-07-12 18:54:56,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530244263] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:56,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:56,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:54:56,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250556661] [2022-07-12 18:54:56,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:56,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:54:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:54:56,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:54:56,329 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:56,444 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-07-12 18:54:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:54:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-07-12 18:54:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:56,445 INFO L225 Difference]: With dead ends: 100 [2022-07-12 18:54:56,445 INFO L226 Difference]: Without dead ends: 100 [2022-07-12 18:54:56,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:54:56,446 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 89 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:56,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 151 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:54:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-12 18:54:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2022-07-12 18:54:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 70 states have internal predecessors, (80), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:54:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-07-12 18:54:56,448 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 27 [2022-07-12 18:54:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:56,449 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-07-12 18:54:56,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-07-12 18:54:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:54:56,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:56,449 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:56,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-12 18:54:56,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:56,656 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1765484353, now seen corresponding path program 1 times [2022-07-12 18:54:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:56,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780682104] [2022-07-12 18:54:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:56,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:56,659 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:56,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 18:54:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:56,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:54:56,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:54:56,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:54:56,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:56,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780682104] [2022-07-12 18:54:56,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780682104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:54:56,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:54:56,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:54:56,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308048720] [2022-07-12 18:54:56,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:54:56,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:54:56,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:54:56,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:54:56,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:54:56,829 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:56,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:54:56,997 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2022-07-12 18:54:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:54:56,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-07-12 18:54:56,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:54:56,998 INFO L225 Difference]: With dead ends: 89 [2022-07-12 18:54:56,998 INFO L226 Difference]: Without dead ends: 89 [2022-07-12 18:54:56,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:54:56,999 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 84 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:54:56,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 183 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:54:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-12 18:54:57,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-07-12 18:54:57,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 75 states have internal predecessors, (86), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:54:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2022-07-12 18:54:57,001 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 27 [2022-07-12 18:54:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:54:57,001 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2022-07-12 18:54:57,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:54:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2022-07-12 18:54:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 18:54:57,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:54:57,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:54:57,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:54:57,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:54:57,203 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:54:57,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:54:57,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1624958864, now seen corresponding path program 1 times [2022-07-12 18:54:57,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:54:57,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867257376] [2022-07-12 18:54:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:57,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:54:57,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:54:57,205 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:54:57,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-12 18:54:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:57,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:54:57,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:57,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:54:57,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:54:57,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-12 18:54:57,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:57,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:54:57,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 18:54:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:57,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:54:59,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:54:59,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867257376] [2022-07-12 18:54:59,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867257376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:54:59,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [480079514] [2022-07-12 18:54:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:54:59,513 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:54:59,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:54:59,514 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:54:59,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-07-12 18:54:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:54:59,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:54:59,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:54:59,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:54:59,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:54:59,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-12 18:54:59,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:54:59,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:54:59,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 18:54:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:54:59,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:01,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [480079514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:55:01,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:55:01,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-12 18:55:01,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278888236] [2022-07-12 18:55:01,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:55:01,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:55:01,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:01,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:55:01,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2022-07-12 18:55:01,907 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-07-12 18:55:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:02,280 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2022-07-12 18:55:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:55:02,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 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 26 [2022-07-12 18:55:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:02,282 INFO L225 Difference]: With dead ends: 120 [2022-07-12 18:55:02,282 INFO L226 Difference]: Without dead ends: 120 [2022-07-12 18:55:02,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=40, Invalid=115, Unknown=1, NotChecked=0, Total=156 [2022-07-12 18:55:02,283 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 98 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:02,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 326 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:55:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-12 18:55:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 103. [2022-07-12 18:55:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 76 states have (on average 1.355263157894737) internal successors, (103), 90 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-12 18:55:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-07-12 18:55:02,286 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 26 [2022-07-12 18:55:02,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:02,286 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-07-12 18:55:02,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-07-12 18:55:02,286 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-07-12 18:55:02,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 18:55:02,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:02,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:02,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-12 18:55:02,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:02,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:55:02,706 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash 631952143, now seen corresponding path program 1 times [2022-07-12 18:55:02,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:02,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246106778] [2022-07-12 18:55:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:02,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:02,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:02,708 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:02,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-12 18:55:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:02,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:55:02,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:02,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:55:02,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:55:02,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-12 18:55:02,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-12 18:55:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:55:02,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:02,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:02,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246106778] [2022-07-12 18:55:02,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246106778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:02,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:55:02,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:55:02,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690793635] [2022-07-12 18:55:02,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:02,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:55:02,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:02,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:55:02,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:55:02,860 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2022-07-12 18:55:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:02,965 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2022-07-12 18:55:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:55:02,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 26 [2022-07-12 18:55:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:02,967 INFO L225 Difference]: With dead ends: 94 [2022-07-12 18:55:02,967 INFO L226 Difference]: Without dead ends: 88 [2022-07-12 18:55:02,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:55:02,967 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 2 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:02,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 318 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:55:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-12 18:55:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-12 18:55:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.380952380952381) internal successors, (87), 77 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:55:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2022-07-12 18:55:02,970 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 26 [2022-07-12 18:55:02,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:02,970 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2022-07-12 18:55:02,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2022-07-12 18:55:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2022-07-12 18:55:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:55:02,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:02,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:02,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:03,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:03,177 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:03,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1765464909, now seen corresponding path program 1 times [2022-07-12 18:55:03,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:03,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795190253] [2022-07-12 18:55:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:03,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:03,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:03,181 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:03,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 18:55:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:03,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:55:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:55:03,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:03,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:03,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795190253] [2022-07-12 18:55:03,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795190253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:03,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:55:03,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:55:03,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958694315] [2022-07-12 18:55:03,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:03,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:55:03,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:55:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:55:03,314 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 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) [2022-07-12 18:55:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:03,507 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2022-07-12 18:55:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:55:03,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 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) Word has length 27 [2022-07-12 18:55:03,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:03,508 INFO L225 Difference]: With dead ends: 99 [2022-07-12 18:55:03,508 INFO L226 Difference]: Without dead ends: 99 [2022-07-12 18:55:03,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:55:03,509 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 117 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:03,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:55:03,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-12 18:55:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2022-07-12 18:55:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.393939393939394) internal successors, (92), 80 states have internal predecessors, (92), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:55:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-07-12 18:55:03,511 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 27 [2022-07-12 18:55:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:03,511 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-07-12 18:55:03,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 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) [2022-07-12 18:55:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-07-12 18:55:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:55:03,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:03,512 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:03,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-12 18:55:03,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:03,719 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:03,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1765464908, now seen corresponding path program 1 times [2022-07-12 18:55:03,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:03,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250814114] [2022-07-12 18:55:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:03,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:03,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:03,721 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:03,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-12 18:55:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:03,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:55:03,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:03,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:03,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:55:03,957 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:55:03,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:55:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:55:04,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:04,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:04,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250814114] [2022-07-12 18:55:04,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250814114] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:04,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:55:04,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:55:04,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182807993] [2022-07-12 18:55:04,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:04,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:55:04,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:55:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:55:04,082 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-07-12 18:55:04,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:04,588 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2022-07-12 18:55:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:55:04,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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 27 [2022-07-12 18:55:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:04,589 INFO L225 Difference]: With dead ends: 125 [2022-07-12 18:55:04,589 INFO L226 Difference]: Without dead ends: 125 [2022-07-12 18:55:04,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:55:04,590 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 119 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:04,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 255 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 54 Unchecked, 0.4s Time] [2022-07-12 18:55:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-12 18:55:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 90. [2022-07-12 18:55:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 79 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:55:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2022-07-12 18:55:04,593 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 27 [2022-07-12 18:55:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:04,593 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2022-07-12 18:55:04,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-07-12 18:55:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2022-07-12 18:55:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:55:04,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:04,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:04,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:04,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:04,801 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:04,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:04,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1104559937, now seen corresponding path program 1 times [2022-07-12 18:55:04,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:04,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438224450] [2022-07-12 18:55:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:04,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:04,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:04,803 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:04,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 18:55:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:04,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 18:55:04,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:04,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:55:04,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:55:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:55:05,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:05,000 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:05,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438224450] [2022-07-12 18:55:05,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438224450] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:05,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:55:05,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:55:05,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565471226] [2022-07-12 18:55:05,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:05,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:55:05,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:55:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:55:05,001 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:55:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:05,215 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-07-12 18:55:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:55:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-12 18:55:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:05,216 INFO L225 Difference]: With dead ends: 92 [2022-07-12 18:55:05,216 INFO L226 Difference]: Without dead ends: 92 [2022-07-12 18:55:05,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:55:05,217 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 85 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:05,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 308 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:55:05,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-12 18:55:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2022-07-12 18:55:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 79 states have internal predecessors, (89), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:55:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2022-07-12 18:55:05,220 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 28 [2022-07-12 18:55:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:05,220 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2022-07-12 18:55:05,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:55:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2022-07-12 18:55:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:55:05,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:05,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:05,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:05,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:05,427 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:05,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:05,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1105162709, now seen corresponding path program 1 times [2022-07-12 18:55:05,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:05,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859034650] [2022-07-12 18:55:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:05,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:05,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:05,429 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:05,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-12 18:55:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:05,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:55:05,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:05,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:55:05,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:05,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:55:05,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:55:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:55:05,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:07,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:07,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859034650] [2022-07-12 18:55:07,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859034650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:55:07,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1129638008] [2022-07-12 18:55:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:07,942 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:55:07,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:55:07,943 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:55:07,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-07-12 18:55:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:08,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:55:08,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:08,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:55:08,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:08,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:55:08,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:55:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:55:08,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:10,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1129638008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:55:10,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:55:10,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-07-12 18:55:10,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888878149] [2022-07-12 18:55:10,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:55:10,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:55:10,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:10,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:55:10,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2022-07-12 18:55:10,376 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 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) [2022-07-12 18:55:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:10,736 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-07-12 18:55:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:55:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 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 28 [2022-07-12 18:55:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:10,738 INFO L225 Difference]: With dead ends: 93 [2022-07-12 18:55:10,738 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 18:55:10,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=80, Invalid=261, Unknown=1, NotChecked=0, Total=342 [2022-07-12 18:55:10,738 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 53 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:10,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 384 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-07-12 18:55:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 18:55:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-07-12 18:55:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 78 states have internal predecessors, (88), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:55:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-07-12 18:55:10,740 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 28 [2022-07-12 18:55:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:10,741 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-07-12 18:55:10,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 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) [2022-07-12 18:55:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-07-12 18:55:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:55:10,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:10,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:10,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-07-12 18:55:10,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:11,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:11,144 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:11,144 INFO L85 PathProgramCache]: Analyzing trace with hash -118380194, now seen corresponding path program 1 times [2022-07-12 18:55:11,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:11,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784883120] [2022-07-12 18:55:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:11,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:11,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:11,145 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:11,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 18:55:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:11,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:55:11,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:11,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:55:11,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:55:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:55:11,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:11,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:11,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784883120] [2022-07-12 18:55:11,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784883120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:11,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:55:11,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:55:11,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311079751] [2022-07-12 18:55:11,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:11,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:55:11,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:11,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:55:11,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:55:11,740 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:55:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:11,757 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2022-07-12 18:55:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:55:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-07-12 18:55:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:11,758 INFO L225 Difference]: With dead ends: 115 [2022-07-12 18:55:11,758 INFO L226 Difference]: Without dead ends: 115 [2022-07-12 18:55:11,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:55:11,758 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 53 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:11,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 364 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 128 Unchecked, 0.0s Time] [2022-07-12 18:55:11,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-12 18:55:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2022-07-12 18:55:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 81 states have internal predecessors, (92), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:55:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2022-07-12 18:55:11,761 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 29 [2022-07-12 18:55:11,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:11,761 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2022-07-12 18:55:11,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:55:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2022-07-12 18:55:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:55:11,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:11,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:11,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:11,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:11,967 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:11,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:11,968 INFO L85 PathProgramCache]: Analyzing trace with hash -628914371, now seen corresponding path program 1 times [2022-07-12 18:55:11,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:11,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516789732] [2022-07-12 18:55:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:11,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:11,969 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:11,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 18:55:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:12,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:55:12,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:12,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:55:12,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:55:12,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:55:12,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:55:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:55:12,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:12,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:12,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516789732] [2022-07-12 18:55:12,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516789732] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:12,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:55:12,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:55:12,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614965972] [2022-07-12 18:55:12,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:12,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:55:12,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:12,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:55:12,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:55:12,119 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:55:12,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:12,240 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2022-07-12 18:55:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:55:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-07-12 18:55:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:12,241 INFO L225 Difference]: With dead ends: 116 [2022-07-12 18:55:12,241 INFO L226 Difference]: Without dead ends: 116 [2022-07-12 18:55:12,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:55:12,243 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 30 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:12,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 382 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:55:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-12 18:55:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2022-07-12 18:55:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 79 states have internal predecessors, (89), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:55:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-07-12 18:55:12,246 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 29 [2022-07-12 18:55:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:12,246 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-07-12 18:55:12,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:55:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-07-12 18:55:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:55:12,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:12,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:12,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:12,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:12,447 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:12,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1021941381, now seen corresponding path program 1 times [2022-07-12 18:55:12,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:12,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032289529] [2022-07-12 18:55:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:12,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:12,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:12,449 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:12,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 18:55:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:12,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:55:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:55:12,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:12,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:12,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032289529] [2022-07-12 18:55:12,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032289529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:12,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:55:12,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:55:12,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204078518] [2022-07-12 18:55:12,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:12,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:55:12,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:12,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:55:12,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:55:12,534 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:55:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:12,573 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-07-12 18:55:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:55:12,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-07-12 18:55:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:12,576 INFO L225 Difference]: With dead ends: 99 [2022-07-12 18:55:12,576 INFO L226 Difference]: Without dead ends: 99 [2022-07-12 18:55:12,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:55:12,576 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 49 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:12,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 183 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:55:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-12 18:55:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2022-07-12 18:55:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.278688524590164) internal successors, (78), 73 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:55:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-07-12 18:55:12,578 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 29 [2022-07-12 18:55:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:12,579 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-07-12 18:55:12,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:55:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-07-12 18:55:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:55:12,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:12,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:12,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:12,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:12,790 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:12,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:12,791 INFO L85 PathProgramCache]: Analyzing trace with hash -99262379, now seen corresponding path program 1 times [2022-07-12 18:55:12,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:12,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968815465] [2022-07-12 18:55:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:12,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:12,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:12,793 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:12,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-12 18:55:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:12,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:55:12,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:55:12,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:12,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:12,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968815465] [2022-07-12 18:55:12,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968815465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:12,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:55:12,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:55:12,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610456698] [2022-07-12 18:55:12,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:12,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:55:12,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:55:12,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:55:12,881 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:55:12,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:12,907 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-07-12 18:55:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:55:12,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-07-12 18:55:12,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:12,908 INFO L225 Difference]: With dead ends: 98 [2022-07-12 18:55:12,909 INFO L226 Difference]: Without dead ends: 98 [2022-07-12 18:55:12,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:55:12,909 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 34 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:12,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 177 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:55:12,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-12 18:55:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2022-07-12 18:55:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 73 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:55:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-07-12 18:55:12,922 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 29 [2022-07-12 18:55:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:12,922 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-07-12 18:55:12,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:55:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-07-12 18:55:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:55:12,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:12,922 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:12,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:13,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:13,130 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:13,130 INFO L85 PathProgramCache]: Analyzing trace with hash -99694285, now seen corresponding path program 1 times [2022-07-12 18:55:13,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:13,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182723247] [2022-07-12 18:55:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:13,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:13,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:13,132 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:13,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-12 18:55:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:13,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:55:13,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:13,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:55:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:13,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:55:13,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:55:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:55:13,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:17,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:17,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182723247] [2022-07-12 18:55:17,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182723247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:55:17,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [271165722] [2022-07-12 18:55:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:17,856 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:55:17,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:55:17,857 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:55:17,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-07-12 18:55:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:17,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:55:17,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:18,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:55:18,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:18,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:55:18,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:55:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:55:18,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:22,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [271165722] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:55:22,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:55:22,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-07-12 18:55:22,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961087642] [2022-07-12 18:55:22,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:55:22,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:55:22,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:22,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:55:22,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=142, Unknown=2, NotChecked=0, Total=182 [2022-07-12 18:55:22,407 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-07-12 18:55:22,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:22,886 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-07-12 18:55:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:55:22,886 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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 29 [2022-07-12 18:55:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:22,887 INFO L225 Difference]: With dead ends: 86 [2022-07-12 18:55:22,887 INFO L226 Difference]: Without dead ends: 86 [2022-07-12 18:55:22,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=79, Invalid=261, Unknown=2, NotChecked=0, Total=342 [2022-07-12 18:55:22,887 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 66 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:22,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 273 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 144 Invalid, 0 Unknown, 18 Unchecked, 0.3s Time] [2022-07-12 18:55:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-12 18:55:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2022-07-12 18:55:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:55:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-07-12 18:55:22,890 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 29 [2022-07-12 18:55:22,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:22,890 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-07-12 18:55:22,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-07-12 18:55:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-07-12 18:55:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:55:22,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:22,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:22,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:23,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:23,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:23,294 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting f19_undoErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:23,294 INFO L85 PathProgramCache]: Analyzing trace with hash 625181411, now seen corresponding path program 1 times [2022-07-12 18:55:23,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:23,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870381263] [2022-07-12 18:55:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:23,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:23,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:23,295 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:23,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-12 18:55:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:55:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:23,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:55:23,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:55:23,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 18:55:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:55:23,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:23,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:23,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870381263] [2022-07-12 18:55:23,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870381263] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:23,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:55:23,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:55:23,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695538122] [2022-07-12 18:55:23,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:23,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:55:23,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:23,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:55:23,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:55:23,495 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:55:23,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:23,876 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-07-12 18:55:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:55:23,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-07-12 18:55:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:23,877 INFO L225 Difference]: With dead ends: 86 [2022-07-12 18:55:23,877 INFO L226 Difference]: Without dead ends: 86 [2022-07-12 18:55:23,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:55:23,878 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 57 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:23,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 261 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:55:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-12 18:55:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2022-07-12 18:55:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 72 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:55:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-07-12 18:55:23,880 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 30 [2022-07-12 18:55:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:23,880 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-07-12 18:55:23,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:55:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-07-12 18:55:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:55:23,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:23,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:23,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-12 18:55:24,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:24,087 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:24,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1204444567, now seen corresponding path program 1 times [2022-07-12 18:55:24,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:24,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769882135] [2022-07-12 18:55:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:24,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:24,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:24,089 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:24,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-12 18:55:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 18:55:24,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:24,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:55:24,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:55:24,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-12 18:55:24,437 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:55:24,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:55:24,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:24,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:55:24,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 18:55:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:55:24,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:30,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:30,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769882135] [2022-07-12 18:55:30,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769882135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:55:30,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1000402223] [2022-07-12 18:55:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:30,990 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:55:30,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:55:30,993 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:55:30,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-12 18:55:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:31,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 18:55:31,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:31,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:55:31,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:55:31,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-12 18:55:33,327 INFO L356 Elim1Store]: treesize reduction 30, result has 31.8 percent of original size [2022-07-12 18:55:33,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-07-12 18:55:33,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:33,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:55:33,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 18:55:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:55:33,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:44,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1000402223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:55:44,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:55:44,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2022-07-12 18:55:44,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056053210] [2022-07-12 18:55:44,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:55:44,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:55:44,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:44,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:55:44,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=252, Unknown=7, NotChecked=0, Total=306 [2022-07-12 18:55:44,186 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:55:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:46,803 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-07-12 18:55:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:55:46,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-12 18:55:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:46,805 INFO L225 Difference]: With dead ends: 97 [2022-07-12 18:55:46,805 INFO L226 Difference]: Without dead ends: 97 [2022-07-12 18:55:46,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=91, Invalid=408, Unknown=7, NotChecked=0, Total=506 [2022-07-12 18:55:46,805 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 66 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:46,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 423 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 251 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2022-07-12 18:55:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-12 18:55:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2022-07-12 18:55:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.21875) internal successors, (78), 75 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:55:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-07-12 18:55:46,808 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 30 [2022-07-12 18:55:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:46,808 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-07-12 18:55:46,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:55:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-07-12 18:55:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:55:46,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:46,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:46,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:47,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-07-12 18:55:47,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:55:47,217 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:47,218 INFO L85 PathProgramCache]: Analyzing trace with hash -584147051, now seen corresponding path program 1 times [2022-07-12 18:55:47,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:47,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488338443] [2022-07-12 18:55:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:47,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:47,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:47,219 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:47,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-12 18:55:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:47,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:55:47,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:55:47,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:47,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:47,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488338443] [2022-07-12 18:55:47,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488338443] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:47,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:55:47,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:55:47,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631534869] [2022-07-12 18:55:47,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:47,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:55:47,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:55:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:55:47,349 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:55:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:47,424 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-07-12 18:55:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:55:47,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 18:55:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:47,425 INFO L225 Difference]: With dead ends: 92 [2022-07-12 18:55:47,425 INFO L226 Difference]: Without dead ends: 92 [2022-07-12 18:55:47,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:55:47,425 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 35 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:47,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 275 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:55:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-12 18:55:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-07-12 18:55:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.208955223880597) internal successors, (81), 78 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:55:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-07-12 18:55:47,427 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 30 [2022-07-12 18:55:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:47,428 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-07-12 18:55:47,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:55:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-07-12 18:55:47,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:55:47,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:47,428 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:47,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:47,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:47,635 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1451440213, now seen corresponding path program 1 times [2022-07-12 18:55:47,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:47,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921215783] [2022-07-12 18:55:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:47,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:47,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:47,637 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:47,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-12 18:55:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:47,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 18:55:47,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:47,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:55:47,806 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:55:47,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:55:47,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:55:49,943 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_21| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_21|) (_ bv4 32)) |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_21|))) is different from true [2022-07-12 18:55:49,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:55:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:49,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-12 18:55:50,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 18:55:50,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:55:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-12 18:55:50,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:55:50,583 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:55:50,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 62 [2022-07-12 18:55:50,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:50,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921215783] [2022-07-12 18:55:50,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921215783] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:55:50,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1738035175] [2022-07-12 18:55:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:50,785 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:55:50,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:55:50,787 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:55:50,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-12 18:55:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:50,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 18:55:50,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:51,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:55:51,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:55:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:55:51,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:51,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1738035175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:51,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:55:51,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 23 [2022-07-12 18:55:51,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728968990] [2022-07-12 18:55:51,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:51,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:55:51,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:55:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=633, Unknown=1, NotChecked=50, Total=756 [2022-07-12 18:55:51,683 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:55:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:52,127 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-07-12 18:55:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:55:52,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-07-12 18:55:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:52,128 INFO L225 Difference]: With dead ends: 95 [2022-07-12 18:55:52,128 INFO L226 Difference]: Without dead ends: 95 [2022-07-12 18:55:52,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=116, Invalid=879, Unknown=1, NotChecked=60, Total=1056 [2022-07-12 18:55:52,129 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 92 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:52,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 242 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 101 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2022-07-12 18:55:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-12 18:55:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-07-12 18:55:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 80 states have internal predecessors, (84), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:55:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-07-12 18:55:52,132 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 33 [2022-07-12 18:55:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:52,132 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-07-12 18:55:52,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:55:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-07-12 18:55:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:55:52,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:52,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:52,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-07-12 18:55:52,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-07-12 18:55:52,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:52,536 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1451440214, now seen corresponding path program 1 times [2022-07-12 18:55:52,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:52,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756520140] [2022-07-12 18:55:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:52,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:52,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:52,537 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:52,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-12 18:55:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:52,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:55:52,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:55:52,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:55:52,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:55:52,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756520140] [2022-07-12 18:55:52,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756520140] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:55:52,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:55:52,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:55:52,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43687950] [2022-07-12 18:55:52,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:55:52,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:55:52,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:55:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:55:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:55:52,869 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:55:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:55:53,254 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-07-12 18:55:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:55:53,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-07-12 18:55:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:55:53,255 INFO L225 Difference]: With dead ends: 94 [2022-07-12 18:55:53,255 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 18:55:53,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:55:53,256 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 109 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:55:53,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 193 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:55:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 18:55:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-07-12 18:55:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 79 states have internal predecessors, (82), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:55:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-07-12 18:55:53,258 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 33 [2022-07-12 18:55:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:55:53,259 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-07-12 18:55:53,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:55:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-07-12 18:55:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:55:53,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:55:53,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:55:53,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-07-12 18:55:53,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:55:53,466 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:55:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:55:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1801348875, now seen corresponding path program 1 times [2022-07-12 18:55:53,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:55:53,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850002305] [2022-07-12 18:55:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:55:53,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:55:53,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:55:53,468 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:55:53,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-12 18:55:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:55:53,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:55:53,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:55:53,672 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:55:53,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-12 18:55:53,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:55:53,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-12 18:56:08,091 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:56:08,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-07-12 18:56:08,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:56:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:56:08,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:56:08,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:08,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850002305] [2022-07-12 18:56:08,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850002305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:56:08,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:56:08,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:56:08,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099270846] [2022-07-12 18:56:08,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:56:08,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:56:08,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:56:08,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=96, Unknown=3, NotChecked=0, Total=132 [2022-07-12 18:56:08,120 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:56:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:08,351 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-07-12 18:56:08,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:56:08,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-07-12 18:56:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:08,352 INFO L225 Difference]: With dead ends: 89 [2022-07-12 18:56:08,352 INFO L226 Difference]: Without dead ends: 89 [2022-07-12 18:56:08,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=45, Invalid=134, Unknown=3, NotChecked=0, Total=182 [2022-07-12 18:56:08,353 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 60 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:08,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 236 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-07-12 18:56:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-12 18:56:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-12 18:56:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.173913043478261) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:56:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-07-12 18:56:08,356 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 33 [2022-07-12 18:56:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:08,356 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-07-12 18:56:08,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:56:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-07-12 18:56:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:56:08,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:08,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:56:08,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-07-12 18:56:08,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:08,564 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:56:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1801348876, now seen corresponding path program 1 times [2022-07-12 18:56:08,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:08,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569961488] [2022-07-12 18:56:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:08,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:08,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:08,567 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:08,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-12 18:56:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:56:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:10,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:56:10,809 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:56:10,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:56:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:56:10,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:56:10,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569961488] [2022-07-12 18:56:10,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569961488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:56:10,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:56:10,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:56:10,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031050132] [2022-07-12 18:56:10,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:56:10,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:56:10,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:56:10,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2022-07-12 18:56:10,972 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:56:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:13,111 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-07-12 18:56:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:56:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-07-12 18:56:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:13,112 INFO L225 Difference]: With dead ends: 88 [2022-07-12 18:56:13,112 INFO L226 Difference]: Without dead ends: 88 [2022-07-12 18:56:13,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=22, Invalid=48, Unknown=2, NotChecked=0, Total=72 [2022-07-12 18:56:13,113 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 55 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:13,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 190 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-07-12 18:56:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-12 18:56:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-12 18:56:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 77 states have internal predecessors, (80), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:56:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-07-12 18:56:13,115 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 33 [2022-07-12 18:56:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:13,115 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-07-12 18:56:13,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:56:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-07-12 18:56:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:56:13,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:13,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:56:13,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:13,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:13,325 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:56:13,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:13,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1275833015, now seen corresponding path program 1 times [2022-07-12 18:56:13,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:13,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706099577] [2022-07-12 18:56:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:13,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:13,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:13,327 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:13,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-12 18:56:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:13,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 18:56:13,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:13,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:56:13,696 INFO L356 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2022-07-12 18:56:13,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-07-12 18:56:13,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:13,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-07-12 18:56:13,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-07-12 18:56:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:56:16,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:20,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:20,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706099577] [2022-07-12 18:56:20,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706099577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:56:20,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1261730842] [2022-07-12 18:56:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:20,427 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:56:20,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:56:20,428 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:56:20,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-07-12 18:56:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:20,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 18:56:20,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:20,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:20,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:56:21,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:56:21,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:21,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:21,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:21,450 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:56:21,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 11 [2022-07-12 18:56:27,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:27,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 38 [2022-07-12 18:56:28,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2022-07-12 18:56:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:56:31,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:33,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1261730842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:56:33,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:56:33,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2022-07-12 18:56:33,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247997228] [2022-07-12 18:56:33,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:56:33,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 18:56:33,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:33,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 18:56:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=614, Unknown=4, NotChecked=0, Total=702 [2022-07-12 18:56:33,993 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 22 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 20 states have internal predecessors, (55), 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) [2022-07-12 18:56:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:34,071 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2022-07-12 18:56:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:56:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 20 states have internal predecessors, (55), 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 32 [2022-07-12 18:56:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:34,072 INFO L225 Difference]: With dead ends: 91 [2022-07-12 18:56:34,072 INFO L226 Difference]: Without dead ends: 73 [2022-07-12 18:56:34,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=84, Invalid=614, Unknown=4, NotChecked=0, Total=702 [2022-07-12 18:56:34,073 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:34,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 521 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 210 Unchecked, 0.1s Time] [2022-07-12 18:56:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-12 18:56:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-12 18:56:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 63 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:56:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-07-12 18:56:34,075 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 32 [2022-07-12 18:56:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:34,075 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-07-12 18:56:34,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 20 states have internal predecessors, (55), 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) [2022-07-12 18:56:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-07-12 18:56:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 18:56:34,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:34,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:56:34,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-07-12 18:56:34,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:34,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:34,485 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:56:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:34,486 INFO L85 PathProgramCache]: Analyzing trace with hash 2044973706, now seen corresponding path program 1 times [2022-07-12 18:56:34,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:34,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641760983] [2022-07-12 18:56:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:34,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:34,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:34,487 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:34,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-12 18:56:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:34,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:56:34,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:34,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:56:34,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:56:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:56:34,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:56:34,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:34,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641760983] [2022-07-12 18:56:34,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641760983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:56:34,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:56:34,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 18:56:34,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952348956] [2022-07-12 18:56:34,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:56:34,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:56:34,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:56:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:56:34,819 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:56:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:35,233 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-07-12 18:56:35,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:56:35,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-07-12 18:56:35,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:35,234 INFO L225 Difference]: With dead ends: 76 [2022-07-12 18:56:35,234 INFO L226 Difference]: Without dead ends: 76 [2022-07-12 18:56:35,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:56:35,234 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 96 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:35,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 271 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:56:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-12 18:56:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-07-12 18:56:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 62 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:56:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-07-12 18:56:35,237 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 34 [2022-07-12 18:56:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:35,237 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-07-12 18:56:35,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:56:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-07-12 18:56:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 18:56:35,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:35,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:56:35,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-07-12 18:56:35,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:35,445 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:56:35,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:35,445 INFO L85 PathProgramCache]: Analyzing trace with hash 7240301, now seen corresponding path program 1 times [2022-07-12 18:56:35,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:35,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703315555] [2022-07-12 18:56:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:35,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:35,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:35,446 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:35,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-12 18:56:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:35,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:56:35,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:35,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:56:35,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:35,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:56:35,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:56:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:56:35,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:37,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703315555] [2022-07-12 18:56:37,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703315555] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:56:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [211262566] [2022-07-12 18:56:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:37,927 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:56:37,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:56:37,929 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:56:37,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-07-12 18:56:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:38,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:56:38,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:38,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:56:38,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:38,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:56:38,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:56:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:56:38,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:40,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [211262566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:56:40,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:56:40,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-12 18:56:40,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708765148] [2022-07-12 18:56:40,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:56:40,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:56:40,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:56:40,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2022-07-12 18:56:40,405 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 9 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:56:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:40,548 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-07-12 18:56:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:56:40,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-07-12 18:56:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:40,549 INFO L225 Difference]: With dead ends: 76 [2022-07-12 18:56:40,549 INFO L226 Difference]: Without dead ends: 76 [2022-07-12 18:56:40,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=47, Invalid=134, Unknown=1, NotChecked=0, Total=182 [2022-07-12 18:56:40,550 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:40,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 235 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-07-12 18:56:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-12 18:56:40,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-07-12 18:56:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 61 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:56:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-07-12 18:56:40,552 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 34 [2022-07-12 18:56:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:40,552 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-07-12 18:56:40,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:56:40,552 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-07-12 18:56:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 18:56:40,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:40,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:56:40,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:40,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-07-12 18:56:40,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:40,955 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:56:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:40,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1030324427, now seen corresponding path program 1 times [2022-07-12 18:56:40,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:40,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960677791] [2022-07-12 18:56:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:40,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:40,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:40,957 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:40,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-12 18:56:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:41,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 18:56:41,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:41,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:56:41,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:56:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:56:41,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:56:41,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:41,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960677791] [2022-07-12 18:56:41,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960677791] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:56:41,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:56:41,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 18:56:41,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923750459] [2022-07-12 18:56:41,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:56:41,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:56:41,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:41,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:56:41,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:56:41,831 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:56:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:41,863 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2022-07-12 18:56:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:56:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-07-12 18:56:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:41,864 INFO L225 Difference]: With dead ends: 78 [2022-07-12 18:56:41,864 INFO L226 Difference]: Without dead ends: 78 [2022-07-12 18:56:41,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:56:41,864 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 40 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:41,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 288 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 88 Unchecked, 0.0s Time] [2022-07-12 18:56:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-12 18:56:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-07-12 18:56:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 63 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:56:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-07-12 18:56:41,867 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 35 [2022-07-12 18:56:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:41,867 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-07-12 18:56:41,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:56:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-07-12 18:56:41,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 18:56:41,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:41,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:56:41,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-07-12 18:56:42,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:42,075 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting f19_undoErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:56:42,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:42,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1875286036, now seen corresponding path program 1 times [2022-07-12 18:56:42,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:42,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90749417] [2022-07-12 18:56:42,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:42,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:42,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:42,076 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:42,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-12 18:56:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:42,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 18:56:42,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:42,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:56:42,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:56:42,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-12 18:56:42,431 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:56:42,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:56:42,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:42,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-12 18:56:42,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-07-12 18:56:42,955 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:56:42,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-07-12 18:56:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:56:42,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:56:42,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:42,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90749417] [2022-07-12 18:56:42,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90749417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:56:42,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:56:42,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-12 18:56:42,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825048754] [2022-07-12 18:56:42,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:56:43,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:56:43,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:43,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:56:43,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:56:43,000 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:56:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:44,547 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2022-07-12 18:56:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:56:44,547 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-07-12 18:56:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:44,548 INFO L225 Difference]: With dead ends: 74 [2022-07-12 18:56:44,548 INFO L226 Difference]: Without dead ends: 74 [2022-07-12 18:56:44,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:56:44,548 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 87 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:44,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 319 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 18:56:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-12 18:56:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-07-12 18:56:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 64 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:56:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-07-12 18:56:44,550 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 36 [2022-07-12 18:56:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:44,551 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-07-12 18:56:44,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:56:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-07-12 18:56:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 18:56:44,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:44,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:56:44,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-07-12 18:56:44,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:44,760 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:56:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1632002513, now seen corresponding path program 1 times [2022-07-12 18:56:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:44,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863114167] [2022-07-12 18:56:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:44,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:44,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:44,761 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:44,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-12 18:56:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:44,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:56:44,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:44,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:56:44,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:56:44,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-12 18:56:45,082 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:56:45,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:56:45,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:45,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-12 18:56:45,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-07-12 18:56:45,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-07-12 18:56:45,590 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:56:45,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-07-12 18:56:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:56:45,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:45,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:45,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863114167] [2022-07-12 18:56:45,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863114167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:56:45,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1699777966] [2022-07-12 18:56:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:45,837 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:56:45,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:56:45,838 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:56:45,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-07-12 18:56:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:46,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 18:56:46,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:46,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:56:46,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:56:46,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-12 18:56:46,149 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:56:46,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:56:46,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:46,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-12 18:56:46,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-07-12 18:56:46,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-07-12 18:56:46,421 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:56:46,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-07-12 18:56:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:56:46,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:46,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1699777966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:56:46,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:56:46,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2022-07-12 18:56:46,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691859571] [2022-07-12 18:56:46,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:56:46,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:56:46,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:46,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:56:46,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:56:46,592 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:56:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:46,972 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2022-07-12 18:56:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:56:46,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-07-12 18:56:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:46,972 INFO L225 Difference]: With dead ends: 73 [2022-07-12 18:56:46,972 INFO L226 Difference]: Without dead ends: 73 [2022-07-12 18:56:46,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:56:46,973 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 58 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:46,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 291 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-07-12 18:56:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-12 18:56:46,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-12 18:56:46,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 63 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:56:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-07-12 18:56:46,975 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 36 [2022-07-12 18:56:46,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:46,975 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-07-12 18:56:46,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:56:46,975 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-07-12 18:56:46,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:56:46,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:46,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:56:46,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-07-12 18:56:47,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:47,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:56:47,379 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:56:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1333538260, now seen corresponding path program 1 times [2022-07-12 18:56:47,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:47,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902737984] [2022-07-12 18:56:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:47,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:47,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:47,381 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:47,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-12 18:56:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:47,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:56:47,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:47,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:56:47,545 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:56:47,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:56:47,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:56:49,677 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_34| (_ BitVec 32))) (not (= |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_34| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_f19_~a#1.base_BEFORE_CALL_34|) (_ bv4 32))))) is different from true [2022-07-12 18:56:49,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:49,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-12 18:56:51,814 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_36| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_36| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_36|) (_ bv4 32))))) is different from true [2022-07-12 18:56:51,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:56:51,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 18:56:51,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:56:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-12 18:56:51,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:56:52,126 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:56:52,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2022-07-12 18:56:52,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:56:52,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902737984] [2022-07-12 18:56:52,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902737984] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:56:52,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [425080986] [2022-07-12 18:56:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:52,417 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:56:52,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:56:52,418 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:56:52,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-07-12 18:56:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:52,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:56:52,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:52,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-12 18:56:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:52,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-07-12 18:56:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:56:53,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:56:53,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [425080986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:56:53,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:56:53,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 18 [2022-07-12 18:56:53,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795116067] [2022-07-12 18:56:53,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:56:53,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:56:53,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:56:53,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:56:53,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=326, Unknown=2, NotChecked=74, Total=462 [2022-07-12 18:56:53,066 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 18:56:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:56:53,237 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-07-12 18:56:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:56:53,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-12 18:56:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:56:53,238 INFO L225 Difference]: With dead ends: 80 [2022-07-12 18:56:53,238 INFO L226 Difference]: Without dead ends: 80 [2022-07-12 18:56:53,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=76, Invalid=392, Unknown=2, NotChecked=82, Total=552 [2022-07-12 18:56:53,239 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:56:53,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 144 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-07-12 18:56:53,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-12 18:56:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2022-07-12 18:56:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 64 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 18:56:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-07-12 18:56:53,241 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 40 [2022-07-12 18:56:53,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:56:53,241 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-07-12 18:56:53,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 18:56:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-07-12 18:56:53,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 18:56:53,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:56:53,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:56:53,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:53,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-07-12 18:56:53,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:56:53,649 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:56:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:56:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash 221296187, now seen corresponding path program 1 times [2022-07-12 18:56:53,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:56:53,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065665079] [2022-07-12 18:56:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:56:53,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:56:53,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:56:53,652 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:56:53,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-07-12 18:56:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:56:53,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 18:56:53,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:56:53,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:56:54,109 INFO L356 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2022-07-12 18:56:54,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-07-12 18:56:54,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:56:54,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 50 [2022-07-12 18:56:54,898 INFO L356 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2022-07-12 18:56:54,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 232 treesize of output 224 [2022-07-12 18:56:55,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 40 [2022-07-12 18:57:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:57:05,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:05,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:05,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065665079] [2022-07-12 18:57:05,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065665079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:05,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:05,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-12 18:57:05,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919968418] [2022-07-12 18:57:05,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:05,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:57:05,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:57:05,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=266, Unknown=3, NotChecked=0, Total=306 [2022-07-12 18:57:05,892 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:57:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:06,052 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-07-12 18:57:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:57:06,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-07-12 18:57:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:06,053 INFO L225 Difference]: With dead ends: 78 [2022-07-12 18:57:06,054 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 18:57:06,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=49, Invalid=328, Unknown=3, NotChecked=0, Total=380 [2022-07-12 18:57:06,054 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:06,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 333 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 237 Unchecked, 0.1s Time] [2022-07-12 18:57:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 18:57:06,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-12 18:57:06,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 51 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:57:06,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-07-12 18:57:06,057 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 42 [2022-07-12 18:57:06,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:06,057 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-07-12 18:57:06,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:57:06,057 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-07-12 18:57:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 18:57:06,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:06,057 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:06,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:06,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:06,258 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:57:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1630446902, now seen corresponding path program 1 times [2022-07-12 18:57:06,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:06,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499057467] [2022-07-12 18:57:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:06,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:06,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:06,260 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:57:06,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-07-12 18:57:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:57:06,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:57:06,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:57:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:57:06,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:57:06,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:57:06,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499057467] [2022-07-12 18:57:06,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499057467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:57:06,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:57:06,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:57:06,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594263917] [2022-07-12 18:57:06,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:57:06,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:57:06,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:57:06,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:57:06,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:57:06,408 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:57:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:57:06,458 INFO L93 Difference]: Finished difference Result 60 states and 59 transitions. [2022-07-12 18:57:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:57:06,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-07-12 18:57:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:57:06,459 INFO L225 Difference]: With dead ends: 60 [2022-07-12 18:57:06,459 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 18:57:06,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:57:06,460 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 53 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:57:06,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 166 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:57:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 18:57:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-12 18:57:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 51 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:57:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 59 transitions. [2022-07-12 18:57:06,462 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 59 transitions. Word has length 42 [2022-07-12 18:57:06,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:57:06,462 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 59 transitions. [2022-07-12 18:57:06,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:57:06,462 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 59 transitions. [2022-07-12 18:57:06,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 18:57:06,462 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:57:06,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:06,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-07-12 18:57:06,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:06,669 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-07-12 18:57:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:57:06,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1009142570, now seen corresponding path program 1 times [2022-07-12 18:57:06,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:57:06,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493640796] [2022-07-12 18:57:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:57:06,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:57:06,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:57:06,671 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:57:06,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-07-12 18:57:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 18:57:06,782 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 18:57:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 18:57:06,882 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-12 18:57:06,882 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 18:57:06,883 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (23 of 24 remaining) [2022-07-12 18:57:06,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 24 remaining) [2022-07-12 18:57:06,895 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2022-07-12 18:57:06,895 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 24 remaining) [2022-07-12 18:57:06,895 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 24 remaining) [2022-07-12 18:57:06,895 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (12 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (11 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (10 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (7 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (6 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (5 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 24 remaining) [2022-07-12 18:57:06,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (2 of 24 remaining) [2022-07-12 18:57:06,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE (1 of 24 remaining) [2022-07-12 18:57:06,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr4ASSERT_VIOLATIONMEMORY_FREE (0 of 24 remaining) [2022-07-12 18:57:06,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-07-12 18:57:07,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:57:07,099 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:57:07,102 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 18:57:07,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 06:57:07 BoogieIcfgContainer [2022-07-12 18:57:07,128 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 18:57:07,129 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 18:57:07,129 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 18:57:07,129 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 18:57:07,129 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:54:41" (3/4) ... [2022-07-12 18:57:07,130 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-12 18:57:07,166 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 18:57:07,167 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 18:57:07,167 INFO L158 Benchmark]: Toolchain (without parser) took 146376.81ms. Allocated memory was 65.0MB in the beginning and 107.0MB in the end (delta: 41.9MB). Free memory was 43.7MB in the beginning and 34.4MB in the end (delta: 9.3MB). Peak memory consumption was 50.9MB. Max. memory is 16.1GB. [2022-07-12 18:57:07,167 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 65.0MB. Free memory was 47.1MB in the beginning and 47.0MB in the end (delta: 49.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:57:07,167 INFO L158 Benchmark]: CACSL2BoogieTranslator took 510.62ms. Allocated memory was 65.0MB in the beginning and 88.1MB in the end (delta: 23.1MB). Free memory was 43.6MB in the beginning and 69.3MB in the end (delta: -25.7MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. [2022-07-12 18:57:07,168 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.25ms. Allocated memory is still 88.1MB. Free memory was 69.3MB in the beginning and 66.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 18:57:07,168 INFO L158 Benchmark]: Boogie Preprocessor took 51.98ms. Allocated memory is still 88.1MB. Free memory was 66.9MB in the beginning and 65.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:57:07,168 INFO L158 Benchmark]: RCFGBuilder took 374.72ms. Allocated memory is still 88.1MB. Free memory was 65.1MB in the beginning and 50.1MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-12 18:57:07,168 INFO L158 Benchmark]: TraceAbstraction took 145343.95ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 49.4MB in the beginning and 38.6MB in the end (delta: 10.8MB). Peak memory consumption was 30.0MB. Max. memory is 16.1GB. [2022-07-12 18:57:07,168 INFO L158 Benchmark]: Witness Printer took 38.24ms. Allocated memory is still 107.0MB. Free memory was 38.6MB in the beginning and 34.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-12 18:57:07,169 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 65.0MB. Free memory was 47.1MB in the beginning and 47.0MB in the end (delta: 49.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 510.62ms. Allocated memory was 65.0MB in the beginning and 88.1MB in the end (delta: 23.1MB). Free memory was 43.6MB in the beginning and 69.3MB in the end (delta: -25.7MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.25ms. Allocated memory is still 88.1MB. Free memory was 69.3MB in the beginning and 66.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.98ms. Allocated memory is still 88.1MB. Free memory was 66.9MB in the beginning and 65.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 374.72ms. Allocated memory is still 88.1MB. Free memory was 65.1MB in the beginning and 50.1MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 145343.95ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 49.4MB in the beginning and 38.6MB in the end (delta: 10.8MB). Peak memory consumption was 30.0MB. Max. memory is 16.1GB. * Witness Printer took 38.24ms. Allocated memory is still 107.0MB. Free memory was 38.6MB in the beginning and 34.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 793]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [ldv_global_msg_list={1:0}] [L804] CALL entry_point() [L797] struct A19 a19; [L798] CALL, EXPR probe_unsafe_19(&a19) [L774] int ret = - -3; VAL [a={-2147483647:0}, a={-2147483647:0}, ldv_global_msg_list={1:0}, ret=3] [L775] CALL, EXPR ldv_malloc(sizeof(int)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L775] RET, EXPR ldv_malloc(sizeof(int)) VAL [a={-2147483647:0}, a={-2147483647:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(int))={2:0}, ret=3] [L775] a->q = (int *)ldv_malloc(sizeof(int)) VAL [a={-2147483647:0}, a={-2147483647:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(int))={2:0}, ret=3] [L776] EXPR a->q VAL [a={-2147483647:0}, a={-2147483647:0}, a->q={2:0}, ldv_global_msg_list={1:0}, ret=3] [L776] COND FALSE !(!a->q) [L777] CALL, EXPR f19(a) [L762] CALL, EXPR ldv_malloc(sizeof(int)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L762] RET, EXPR ldv_malloc(sizeof(int)) VAL [a={-2147483647:0}, a={-2147483647:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(int))={3:0}] [L762] a->p = (int *)ldv_malloc(sizeof(int)) VAL [a={-2147483647:0}, a={-2147483647:0}, ldv_global_msg_list={1:0}, ldv_malloc(sizeof(int))={3:0}] [L763] a->p VAL [a={-2147483647:0}, a={-2147483647:0}, a->p={3:0}, ldv_global_msg_list={1:0}] [L763] COND TRUE a->p [L764] return 0; VAL [\result=0, a={-2147483647:0}, a={-2147483647:0}, ldv_global_msg_list={1:0}] [L777] RET, EXPR f19(a) [L777] ret = f19(a) [L778] COND FALSE !(\read(ret)) [L781] CALL, EXPR g19() [L771] return __VERIFIER_nondet_int(); [L781] RET, EXPR g19() [L781] COND TRUE !g19() [L786] CALL f19_undo(a) VAL [a={-2147483647:0}, ldv_global_msg_list={1:0}] [L768] EXPR a->p VAL [a={-2147483647:0}, a={-2147483647:0}, a->p={3:0}, ldv_global_msg_list={1:0}] [L768] free(a->p) VAL [a={-2147483647:0}, a={-2147483647:0}, a->p={3:0}, ldv_global_msg_list={1:0}] [L768] free(a->p) VAL [a={-2147483647:0}, a={-2147483647:0}, a->p={3:0}, ldv_global_msg_list={1:0}] [L768] free(a->p) [L786] RET f19_undo(a) VAL [a={-2147483647:0}, a={-2147483647:0}, ldv_global_msg_list={1:0}, ret=0] [L788] EXPR a->q VAL [a={-2147483647:0}, a={-2147483647:0}, a->q={2:0}, ldv_global_msg_list={1:0}, ret=0] [L788] free(a->q) VAL [a={-2147483647:0}, a={-2147483647:0}, a->q={2:0}, ldv_global_msg_list={1:0}, ret=0] [L788] free(a->q) VAL [a={-2147483647:0}, a={-2147483647:0}, a->q={2:0}, ldv_global_msg_list={1:0}, ret=0] [L788] free(a->q) [L790] return ret; VAL [\result=0, a={-2147483647:0}, a={-2147483647:0}, ldv_global_msg_list={1:0}, ret=0] [L798] RET, EXPR probe_unsafe_19(&a19) [L798] int ret = probe_unsafe_19(&a19); [L799] COND TRUE ret==0 [L800] CALL disconnect_19(&a19) [L793] EXPR a->q VAL [a={-2147483647:0}, a={-2147483647:0}, a->q={2:0}, ldv_global_msg_list={1:0}] [L793] free(a->q) VAL [a={-2147483647:0}, a={-2147483647:0}, a->q={2:0}, ldv_global_msg_list={1:0}] [L793] free(a->q) VAL [a={-2147483647:0}, a={-2147483647:0}, a->q={2:0}, ldv_global_msg_list={1:0}] [L793] free(a->q) VAL [a={-2147483647:0}, a={-2147483647:0}, a->q={2:0}, ldv_global_msg_list={1:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 793]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 793]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 803]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 70 locations, 24 error locations. Started 1 CEGAR loops. OverallTime: 145.3s, OverallIterations: 41, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 13.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2773 SdHoareTripleChecker+Valid, 6.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2721 mSDsluCounter, 10665 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1646 IncrementalHoareTripleChecker+Unchecked, 8400 mSDsCounter, 290 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3678 IncrementalHoareTripleChecker+Invalid, 5614 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 290 mSolverCounterUnsat, 2265 mSDtfsCounter, 3678 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1778 GetRequests, 1271 SyntacticMatches, 50 SemanticMatches, 457 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 112.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=14, InterpolantAutomatonStates: 407, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 40 MinimizatonAttempts, 571 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 115.8s InterpolantComputationTime, 1486 NumberOfCodeBlocks, 1486 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 1392 ConstructedInterpolants, 274 QuantifiedInterpolants, 14725 SizeOfPredicates, 514 NumberOfNonLiveVariables, 6304 ConjunctsInSsa, 925 ConjunctsInUnsatCore, 51 InterpolantComputations, 31 PerfectInterpolantSequences, 138/184 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 proved your program to be incorrect! [2022-07-12 18:57:07,210 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free)