./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0019-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0019-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 40afad058466dec508429aba14a695fa830becbd8e90e3307f02f796ff077dad ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0019-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 40afad058466dec508429aba14a695fa830becbd8e90e3307f02f796ff077dad ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:09:40,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:09:40,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:09:40,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:09:40,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:09:40,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:09:40,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:09:40,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:09:40,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:09:40,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:09:40,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:09:40,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:09:40,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:09:40,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:09:40,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:09:40,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:09:40,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:09:40,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:09:40,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:09:40,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:09:40,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:09:40,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:09:40,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:09:40,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:09:40,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:09:40,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:09:40,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:09:40,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:09:40,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:09:40,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:09:40,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:09:40,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:09:40,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:09:40,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:09:40,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:09:40,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:09:40,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:09:40,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:09:40,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:09:40,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:09:40,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:09:40,685 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-29 05:09:40,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:09:40,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:09:40,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:09:40,733 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:09:40,733 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:09:40,733 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:09:40,733 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:09:40,733 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:09:40,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:09:40,734 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:09:40,735 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:09:40,735 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:09:40,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:09:40,736 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:09:40,736 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:09:40,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 05:09:40,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 05:09:40,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:09:40,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:09:40,737 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 05:09:40,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:09:40,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:09:40,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:09:40,738 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-29 05:09:40,738 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-29 05:09:40,739 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-29 05:09:40,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:09:40,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:09:40,741 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:09:40,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:09:40,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:09:40,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:09:40,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:09:40,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:09:40,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:09:40,742 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:09:40,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:09:40,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:09:40,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:09:40,743 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40afad058466dec508429aba14a695fa830becbd8e90e3307f02f796ff077dad [2021-10-29 05:09:41,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:09:41,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:09:41,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:09:41,075 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:09:41,076 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:09:41,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-29 05:09:41,161 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/data/287e41c4a/f9e63b1c318146c5af88d1af35427d9e/FLAGe652ae9b2 [2021-10-29 05:09:41,701 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:09:41,701 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-29 05:09:41,720 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/data/287e41c4a/f9e63b1c318146c5af88d1af35427d9e/FLAGe652ae9b2 [2021-10-29 05:09:42,006 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/data/287e41c4a/f9e63b1c318146c5af88d1af35427d9e [2021-10-29 05:09:42,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:09:42,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:09:42,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:09:42,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:09:42,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:09:42,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e1ca5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42, skipping insertion in model container [2021-10-29 05:09:42,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:09:42,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:09:42,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:09:42,405 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:09:42,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:09:42,520 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:09:42,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42 WrapperNode [2021-10-29 05:09:42,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:09:42,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:09:42,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:09:42,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:09:42,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:09:42,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:09:42,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:09:42,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:09:42,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:09:42,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:09:42,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:09:42,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:09:42,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42" (1/1) ... [2021-10-29 05:09:42,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:09:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:09:42,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:09:42,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:09:42,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 05:09:42,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 05:09:42,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:09:42,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 05:09:42,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:09:42,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:09:42,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:09:42,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:09:43,066 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:09:43,067 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-29 05:09:43,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:09:43 BoogieIcfgContainer [2021-10-29 05:09:43,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:09:43,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:09:43,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:09:43,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:09:43,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:09:42" (1/3) ... [2021-10-29 05:09:43,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a8c862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:09:43, skipping insertion in model container [2021-10-29 05:09:43,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:42" (2/3) ... [2021-10-29 05:09:43,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a8c862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:09:43, skipping insertion in model container [2021-10-29 05:09:43,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:09:43" (3/3) ... [2021-10-29 05:09:43,077 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019-2.i [2021-10-29 05:09:43,082 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:09:43,082 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-29 05:09:43,131 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:09:43,137 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 05:09:43,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-29 05:09:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-29 05:09:43,158 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:43,158 INFO L513 BasicCegarLoop]: trace histogram [1, 1] [2021-10-29 05:09:43,159 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:43,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2732, now seen corresponding path program 1 times [2021-10-29 05:09:43,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:09:43,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146997771] [2021-10-29 05:09:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:43,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:09:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:43,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:09:43,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146997771] [2021-10-29 05:09:43,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146997771] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:43,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:43,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-29 05:09:43,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424711557] [2021-10-29 05:09:43,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:09:43,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:09:43,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:09:43,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:09:43,410 INFO L87 Difference]: Start difference. First operand has 35 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:43,501 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-10-29 05:09:43,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:09:43,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-29 05:09:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:43,511 INFO L225 Difference]: With dead ends: 39 [2021-10-29 05:09:43,512 INFO L226 Difference]: Without dead ends: 38 [2021-10-29 05:09:43,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:09:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-29 05:09:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-10-29 05:09:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-10-29 05:09:43,554 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 2 [2021-10-29 05:09:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:43,554 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-10-29 05:09:43,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,555 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-10-29 05:09:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-29 05:09:43,556 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:43,556 INFO L513 BasicCegarLoop]: trace histogram [1, 1] [2021-10-29 05:09:43,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:09:43,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:43,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:43,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2733, now seen corresponding path program 1 times [2021-10-29 05:09:43,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:09:43,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636671985] [2021-10-29 05:09:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:43,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:09:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:43,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:09:43,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636671985] [2021-10-29 05:09:43,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636671985] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:43,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:43,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-29 05:09:43,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944064493] [2021-10-29 05:09:43,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:09:43,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:09:43,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:09:43,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:09:43,655 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:43,678 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-10-29 05:09:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:09:43,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-29 05:09:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:43,679 INFO L225 Difference]: With dead ends: 30 [2021-10-29 05:09:43,680 INFO L226 Difference]: Without dead ends: 30 [2021-10-29 05:09:43,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:09:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-29 05:09:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-29 05:09:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 2.0) internal successors, (30), 29 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-10-29 05:09:43,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 2 [2021-10-29 05:09:43,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:43,685 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-10-29 05:09:43,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,686 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-10-29 05:09:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-29 05:09:43,686 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:43,687 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-29 05:09:43,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:09:43,687 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2677112, now seen corresponding path program 1 times [2021-10-29 05:09:43,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:09:43,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780932398] [2021-10-29 05:09:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:43,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:09:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:43,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:09:43,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780932398] [2021-10-29 05:09:43,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780932398] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:43,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:43,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:09:43,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324223146] [2021-10-29 05:09:43,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:09:43,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:09:43,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:09:43,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:09:43,747 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:43,817 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-10-29 05:09:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:09:43,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-29 05:09:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:43,819 INFO L225 Difference]: With dead ends: 29 [2021-10-29 05:09:43,819 INFO L226 Difference]: Without dead ends: 29 [2021-10-29 05:09:43,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:09:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-29 05:09:43,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-10-29 05:09:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.8125) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-29 05:09:43,828 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 4 [2021-10-29 05:09:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:43,829 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-29 05:09:43,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,829 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-29 05:09:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-29 05:09:43,829 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:43,830 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-29 05:09:43,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 05:09:43,830 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:43,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2677113, now seen corresponding path program 1 times [2021-10-29 05:09:43,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:09:43,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604044045] [2021-10-29 05:09:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:43,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:09:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:43,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:09:43,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604044045] [2021-10-29 05:09:43,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604044045] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:43,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:43,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:09:43,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059085064] [2021-10-29 05:09:43,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:09:43,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:09:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:09:43,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:09:43,906 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:43,941 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-10-29 05:09:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:09:43,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-29 05:09:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:43,942 INFO L225 Difference]: With dead ends: 24 [2021-10-29 05:09:43,942 INFO L226 Difference]: Without dead ends: 24 [2021-10-29 05:09:43,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:09:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-29 05:09:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-29 05:09:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-10-29 05:09:43,945 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 4 [2021-10-29 05:09:43,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:43,946 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-10-29 05:09:43,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:43,946 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-10-29 05:09:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-29 05:09:43,947 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:43,947 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:09:43,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-29 05:09:43,947 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:43,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:43,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1849323435, now seen corresponding path program 1 times [2021-10-29 05:09:43,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:09:43,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144364879] [2021-10-29 05:09:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:43,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:09:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:44,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:09:44,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144364879] [2021-10-29 05:09:44,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144364879] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:44,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:44,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 05:09:44,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904891565] [2021-10-29 05:09:44,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:09:44,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:09:44,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:09:44,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:09:44,068 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:44,167 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-10-29 05:09:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:09:44,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-29 05:09:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:44,169 INFO L225 Difference]: With dead ends: 23 [2021-10-29 05:09:44,169 INFO L226 Difference]: Without dead ends: 23 [2021-10-29 05:09:44,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:09:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-29 05:09:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-29 05:09:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.4375) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-10-29 05:09:44,172 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2021-10-29 05:09:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:44,172 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-10-29 05:09:44,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-10-29 05:09:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:09:44,173 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:44,173 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:09:44,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-29 05:09:44,174 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:44,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1494451580, now seen corresponding path program 1 times [2021-10-29 05:09:44,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:09:44,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913294260] [2021-10-29 05:09:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:44,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:09:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:44,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:09:44,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913294260] [2021-10-29 05:09:44,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913294260] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:44,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:44,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 05:09:44,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938503657] [2021-10-29 05:09:44,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:09:44,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:09:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:09:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:09:44,340 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:44,424 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-10-29 05:09:44,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:09:44,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-29 05:09:44,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:44,426 INFO L225 Difference]: With dead ends: 22 [2021-10-29 05:09:44,426 INFO L226 Difference]: Without dead ends: 22 [2021-10-29 05:09:44,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:09:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-29 05:09:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-29 05:09:44,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-10-29 05:09:44,433 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 8 [2021-10-29 05:09:44,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:44,433 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-10-29 05:09:44,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-10-29 05:09:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 05:09:44,434 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:44,434 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:09:44,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-29 05:09:44,435 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:44,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash 917072751, now seen corresponding path program 1 times [2021-10-29 05:09:44,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:09:44,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11073541] [2021-10-29 05:09:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:44,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:09:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:09:44,503 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:09:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:09:44,571 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:09:44,571 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:09:44,572 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:09:44,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-29 05:09:44,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-29 05:09:44,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-29 05:09:44,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-29 05:09:44,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-29 05:09:44,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-29 05:09:44,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-29 05:09:44,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-29 05:09:44,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:09:44,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:09:44,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:09:44,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:09:44,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:09:44,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:09:44,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-29 05:09:44,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-29 05:09:44,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-29 05:09:44,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-29 05:09:44,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-29 05:09:44,581 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:09:44,583 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:09:44,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:09:44 BoogieIcfgContainer [2021-10-29 05:09:44,605 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:09:44,605 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:09:44,605 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:09:44,605 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:09:44,606 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:09:43" (3/4) ... [2021-10-29 05:09:44,609 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 05:09:44,609 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:09:44,611 INFO L168 Benchmark]: Toolchain (without parser) took 2599.17 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 83.8 MB in the beginning and 95.2 MB in the end (delta: -11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:09:44,611 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 115.3 MB. Free memory is still 68.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:09:44,612 INFO L168 Benchmark]: CACSL2BoogieTranslator took 494.13 ms. Allocated memory is still 115.3 MB. Free memory was 83.5 MB in the beginning and 84.2 MB in the end (delta: -660.3 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:09:44,612 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.89 ms. Allocated memory is still 115.3 MB. Free memory was 84.2 MB in the beginning and 82.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:09:44,612 INFO L168 Benchmark]: Boogie Preprocessor took 39.45 ms. Allocated memory is still 115.3 MB. Free memory was 82.5 MB in the beginning and 81.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:09:44,613 INFO L168 Benchmark]: RCFGBuilder took 464.81 ms. Allocated memory is still 115.3 MB. Free memory was 81.0 MB in the beginning and 65.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-29 05:09:44,613 INFO L168 Benchmark]: TraceAbstraction took 1533.79 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 65.4 MB in the beginning and 95.2 MB in the end (delta: -29.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:09:44,614 INFO L168 Benchmark]: Witness Printer took 4.04 ms. Allocated memory is still 138.4 MB. Free memory is still 95.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:09:44,616 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 115.3 MB. Free memory is still 68.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 494.13 ms. Allocated memory is still 115.3 MB. Free memory was 83.5 MB in the beginning and 84.2 MB in the end (delta: -660.3 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.89 ms. Allocated memory is still 115.3 MB. Free memory was 84.2 MB in the beginning and 82.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.45 ms. Allocated memory is still 115.3 MB. Free memory was 82.5 MB in the beginning and 81.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 464.81 ms. Allocated memory is still 115.3 MB. Free memory was 81.0 MB in the beginning and 65.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1533.79 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 65.4 MB in the beginning and 95.2 MB in the end (delta: -29.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.04 ms. Allocated memory is still 138.4 MB. Free memory is still 95.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 543. Possible FailurePath: [L544] TData data; [L529] pdata->lo = malloc(16) [L530] pdata->hi = malloc(24) [L534] EXPR data->lo [L534] void *lo = data->lo; [L535] EXPR data->hi [L535] void *hi = data->hi; [L536] COND FALSE !(lo == hi) [L540] data->lo = (void *) 0 [L541] data->hi = (void *) 0 [L547] return 0; [L547] return 0; - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 90 SDtfs, 215 SDslu, 34 SDs, 0 SdLazy, 127 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 161 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-29 05:09:44,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:09:47,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:09:47,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:09:47,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:09:47,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:09:47,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:09:47,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:09:47,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:09:47,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:09:47,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:09:47,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:09:47,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:09:47,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:09:47,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:09:47,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:09:47,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:09:47,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:09:47,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:09:47,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:09:47,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:09:47,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:09:47,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:09:47,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:09:47,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:09:47,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:09:47,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:09:47,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:09:47,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:09:47,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:09:47,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:09:47,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:09:47,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:09:47,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:09:47,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:09:47,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:09:47,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:09:47,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:09:47,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:09:47,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:09:47,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:09:47,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:09:47,236 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-29 05:09:47,275 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:09:47,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:09:47,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:09:47,277 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:09:47,277 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:09:47,277 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:09:47,278 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:09:47,278 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:09:47,278 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:09:47,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 05:09:47,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 05:09:47,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:09:47,281 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:09:47,281 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 05:09:47,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:09:47,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:09:47,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:09:47,282 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-29 05:09:47,283 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-29 05:09:47,283 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-29 05:09:47,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:09:47,283 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:09:47,283 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 05:09:47,284 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 05:09:47,284 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:09:47,284 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:09:47,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:09:47,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 05:09:47,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:09:47,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:09:47,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:09:47,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:09:47,286 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 05:09:47,286 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 05:09:47,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:09:47,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:09:47,287 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40afad058466dec508429aba14a695fa830becbd8e90e3307f02f796ff077dad [2021-10-29 05:09:47,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:09:47,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:09:47,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:09:47,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:09:47,664 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:09:47,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-29 05:09:47,726 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/data/6a44f0ba1/43929ae2e71748a98dc922533765381b/FLAG06bdb69cc [2021-10-29 05:09:48,244 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:09:48,245 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-29 05:09:48,271 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/data/6a44f0ba1/43929ae2e71748a98dc922533765381b/FLAG06bdb69cc [2021-10-29 05:09:48,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/data/6a44f0ba1/43929ae2e71748a98dc922533765381b [2021-10-29 05:09:48,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:09:48,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:09:48,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:09:48,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:09:48,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:09:48,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:09:48" (1/1) ... [2021-10-29 05:09:48,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3042ab8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:48, skipping insertion in model container [2021-10-29 05:09:48,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:09:48" (1/1) ... [2021-10-29 05:09:48,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:09:48,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:09:49,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:09:49,089 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:09:49,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:09:49,189 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:09:49,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49 WrapperNode [2021-10-29 05:09:49,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:09:49,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:09:49,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:09:49,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:09:49,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49" (1/1) ... [2021-10-29 05:09:49,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49" (1/1) ... [2021-10-29 05:09:49,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:09:49,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:09:49,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:09:49,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:09:49,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49" (1/1) ... [2021-10-29 05:09:49,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49" (1/1) ... [2021-10-29 05:09:49,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49" (1/1) ... [2021-10-29 05:09:49,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49" (1/1) ... [2021-10-29 05:09:49,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49" (1/1) ... [2021-10-29 05:09:49,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49" (1/1) ... [2021-10-29 05:09:49,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49" (1/1) ... [2021-10-29 05:09:49,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:09:49,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:09:49,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:09:49,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:09:49,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49" (1/1) ... [2021-10-29 05:09:49,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:09:49,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:09:49,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:09:49,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:09:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 05:09:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 05:09:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:09:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 05:09:49,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:09:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 05:09:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:09:49,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:09:49,881 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:09:49,881 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-29 05:09:49,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:09:49 BoogieIcfgContainer [2021-10-29 05:09:49,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:09:49,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:09:49,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:09:49,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:09:49,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:09:48" (1/3) ... [2021-10-29 05:09:49,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1031312f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:09:49, skipping insertion in model container [2021-10-29 05:09:49,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:09:49" (2/3) ... [2021-10-29 05:09:49,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1031312f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:09:49, skipping insertion in model container [2021-10-29 05:09:49,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:09:49" (3/3) ... [2021-10-29 05:09:49,892 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019-2.i [2021-10-29 05:09:49,897 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:09:49,898 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-29 05:09:49,942 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:09:49,948 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 05:09:49,949 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-29 05:09:49,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-29 05:09:49,969 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:49,970 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-29 05:09:49,970 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:49,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:49,976 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-10-29 05:09:49,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:09:49,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814251439] [2021-10-29 05:09:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:49,990 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:09:49,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:09:49,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:09:50,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 05:09:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:50,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 05:09:50,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:09:50,162 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-29 05:09:50,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-29 05:09:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:50,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:09:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:50,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:09:50,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814251439] [2021-10-29 05:09:50,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814251439] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:50,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:50,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:09:50,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408903874] [2021-10-29 05:09:50,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:09:50,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:09:50,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:09:50,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:09:50,259 INFO L87 Difference]: Start difference. First operand has 43 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:50,378 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-10-29 05:09:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:09:50,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-29 05:09:50,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:50,388 INFO L225 Difference]: With dead ends: 48 [2021-10-29 05:09:50,388 INFO L226 Difference]: Without dead ends: 46 [2021-10-29 05:09:50,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:09:50,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-29 05:09:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-10-29 05:09:50,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 38 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-10-29 05:09:50,421 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 3 [2021-10-29 05:09:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:50,422 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-10-29 05:09:50,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-10-29 05:09:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-29 05:09:50,423 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:50,423 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-29 05:09:50,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:09:50,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:09:50,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:50,636 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-10-29 05:09:50,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:09:50,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060768346] [2021-10-29 05:09:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:50,638 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:09:50,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:09:50,639 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:09:50,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 05:09:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-29 05:09:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:09:50,790 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 05:09:50,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2021-10-29 05:09:50,798 INFO L388 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 22 treesize of output 20 [2021-10-29 05:09:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:50,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:09:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:50,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:09:50,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060768346] [2021-10-29 05:09:50,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060768346] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:50,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:50,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-29 05:09:50,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429158372] [2021-10-29 05:09:50,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:09:50,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:09:50,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:09:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:09:50,975 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:51,131 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-10-29 05:09:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:09:51,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-29 05:09:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:51,134 INFO L225 Difference]: With dead ends: 38 [2021-10-29 05:09:51,134 INFO L226 Difference]: Without dead ends: 38 [2021-10-29 05:09:51,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:09:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-29 05:09:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-29 05:09:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 37 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-10-29 05:09:51,139 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 3 [2021-10-29 05:09:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:51,140 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-10-29 05:09:51,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-10-29 05:09:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:09:51,141 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:51,141 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:09:51,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:09:51,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:09:51,347 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash 28691811, now seen corresponding path program 1 times [2021-10-29 05:09:51,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:09:51,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054581295] [2021-10-29 05:09:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:51,349 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:09:51,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:09:51,350 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:09:51,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-29 05:09:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:51,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-29 05:09:51,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:09:51,514 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 05:09:51,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-10-29 05:09:51,520 INFO L388 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 23 treesize of output 21 [2021-10-29 05:09:51,704 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-29 05:09:51,705 INFO L388 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 3 case distinctions, treesize of input 37 treesize of output 46 [2021-10-29 05:09:51,723 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-29 05:09:51,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2021-10-29 05:09:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:51,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:09:54,494 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-29 05:09:54,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-29 05:09:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:54,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:09:54,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054581295] [2021-10-29 05:09:54,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054581295] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:54,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:54,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6 [2021-10-29 05:09:54,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523347271] [2021-10-29 05:09:54,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:09:54,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:09:54,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:09:54,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-29 05:09:54,665 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:54,877 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-10-29 05:09:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:09:54,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:09:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:54,880 INFO L225 Difference]: With dead ends: 37 [2021-10-29 05:09:54,880 INFO L226 Difference]: Without dead ends: 37 [2021-10-29 05:09:54,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-29 05:09:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-29 05:09:54,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-29 05:09:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-10-29 05:09:54,885 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 5 [2021-10-29 05:09:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:54,885 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-10-29 05:09:54,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:54,885 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-10-29 05:09:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:09:54,885 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:54,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:09:54,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:09:55,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:09:55,086 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:55,087 INFO L85 PathProgramCache]: Analyzing trace with hash 59200011, now seen corresponding path program 1 times [2021-10-29 05:09:55,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:09:55,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047655394] [2021-10-29 05:09:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:55,089 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:09:55,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:09:55,090 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:09:55,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-29 05:09:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:55,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 05:09:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:09:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:55,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:09:55,336 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-29 05:09:55,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-10-29 05:09:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:55,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:09:55,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047655394] [2021-10-29 05:09:55,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047655394] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:55,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:55,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-29 05:09:55,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459562196] [2021-10-29 05:09:55,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:09:55,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:09:55,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:09:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:09:55,364 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:55,620 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-10-29 05:09:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:09:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-29 05:09:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:55,622 INFO L225 Difference]: With dead ends: 39 [2021-10-29 05:09:55,622 INFO L226 Difference]: Without dead ends: 39 [2021-10-29 05:09:55,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:09:55,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-29 05:09:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-10-29 05:09:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.565217391304348) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-10-29 05:09:55,627 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 8 [2021-10-29 05:09:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:55,628 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-10-29 05:09:55,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-10-29 05:09:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:09:55,629 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:55,629 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:09:55,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:09:55,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:09:55,839 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash 59200012, now seen corresponding path program 1 times [2021-10-29 05:09:55,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:09:55,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46831757] [2021-10-29 05:09:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:55,841 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:09:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:09:55,842 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:09:55,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-29 05:09:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:55,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-29 05:09:55,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:09:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:56,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:09:56,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:09:56,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-10-29 05:09:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:56,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:09:56,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46831757] [2021-10-29 05:09:56,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46831757] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:56,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:56,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-29 05:09:56,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533496267] [2021-10-29 05:09:56,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:09:56,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:09:56,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:09:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:09:56,659 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:56,923 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-10-29 05:09:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:09:56,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-29 05:09:56,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:56,925 INFO L225 Difference]: With dead ends: 31 [2021-10-29 05:09:56,925 INFO L226 Difference]: Without dead ends: 31 [2021-10-29 05:09:56,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:09:56,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-29 05:09:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-29 05:09:56,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-10-29 05:09:56,930 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 8 [2021-10-29 05:09:56,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:56,930 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-10-29 05:09:56,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-10-29 05:09:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-29 05:09:56,931 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:56,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:09:56,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:09:57,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:09:57,142 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:57,143 INFO L85 PathProgramCache]: Analyzing trace with hash 406185098, now seen corresponding path program 1 times [2021-10-29 05:09:57,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:09:57,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132413419] [2021-10-29 05:09:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:57,144 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:09:57,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:09:57,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:09:57,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-29 05:09:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:57,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-29 05:09:57,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:09:57,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-29 05:09:57,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-29 05:09:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:57,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:09:57,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-10-29 05:09:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:57,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:09:57,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132413419] [2021-10-29 05:09:57,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132413419] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:09:57,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:09:57,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-29 05:09:57,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424120676] [2021-10-29 05:09:57,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:09:57,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:09:57,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:09:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:09:57,704 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:58,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:09:58,368 INFO L93 Difference]: Finished difference Result 33 states and 32 transitions. [2021-10-29 05:09:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-29 05:09:58,368 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-29 05:09:58,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:09:58,369 INFO L225 Difference]: With dead ends: 33 [2021-10-29 05:09:58,369 INFO L226 Difference]: Without dead ends: 33 [2021-10-29 05:09:58,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-29 05:09:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-29 05:09:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-10-29 05:09:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-10-29 05:09:58,379 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 13 [2021-10-29 05:09:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:09:58,381 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-10-29 05:09:58,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:09:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-10-29 05:09:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-29 05:09:58,384 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:09:58,384 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:09:58,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:09:58,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:09:58,597 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:09:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:09:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash -293163793, now seen corresponding path program 1 times [2021-10-29 05:09:58,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:09:58,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156509912] [2021-10-29 05:09:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:09:58,598 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:09:58,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:09:58,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:09:58,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-29 05:09:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:09:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-29 05:09:58,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:09:58,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-29 05:09:59,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-29 05:09:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:09:59,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:09:59,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-10-29 05:10:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:10:00,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:10:00,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156509912] [2021-10-29 05:10:00,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156509912] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:10:00,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:10:00,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 16 [2021-10-29 05:10:00,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923503877] [2021-10-29 05:10:00,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-29 05:10:00,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:10:00,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-29 05:10:00,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-10-29 05:10:00,019 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:10:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:10:01,645 INFO L93 Difference]: Finished difference Result 31 states and 30 transitions. [2021-10-29 05:10:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-29 05:10:01,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-29 05:10:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:10:01,647 INFO L225 Difference]: With dead ends: 31 [2021-10-29 05:10:01,647 INFO L226 Difference]: Without dead ends: 31 [2021-10-29 05:10:01,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-10-29 05:10:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-29 05:10:01,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-10-29 05:10:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:10:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-10-29 05:10:01,652 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-10-29 05:10:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:10:01,653 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-10-29 05:10:01,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:10:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-10-29 05:10:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-29 05:10:01,654 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:10:01,654 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:10:01,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-29 05:10:01,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:10:01,863 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:10:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:10:01,863 INFO L85 PathProgramCache]: Analyzing trace with hash -498142932, now seen corresponding path program 1 times [2021-10-29 05:10:01,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:10:01,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113638040] [2021-10-29 05:10:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:10:01,864 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:10:01,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:10:01,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:10:01,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-29 05:10:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:10:01,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-29 05:10:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:10:02,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-29 05:10:02,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-29 05:10:02,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-10-29 05:10:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:10:02,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:10:02,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2021-10-29 05:10:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:10:02,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:10:02,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113638040] [2021-10-29 05:10:02,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113638040] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:10:02,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:10:02,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-10-29 05:10:02,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006647727] [2021-10-29 05:10:02,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-29 05:10:02,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:10:02,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-29 05:10:02,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:10:02,573 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:10:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:10:03,307 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-10-29 05:10:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-29 05:10:03,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-29 05:10:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:10:03,309 INFO L225 Difference]: With dead ends: 28 [2021-10-29 05:10:03,310 INFO L226 Difference]: Without dead ends: 28 [2021-10-29 05:10:03,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-29 05:10:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-29 05:10:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-10-29 05:10:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:10:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-10-29 05:10:03,313 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 15 [2021-10-29 05:10:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:10:03,314 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-10-29 05:10:03,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:10:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-10-29 05:10:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-29 05:10:03,315 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:10:03,315 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:10:03,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-29 05:10:03,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:10:03,519 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-29 05:10:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:10:03,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1750799681, now seen corresponding path program 1 times [2021-10-29 05:10:03,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:10:03,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912286729] [2021-10-29 05:10:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:10:03,520 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:10:03,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:10:03,521 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:10:03,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-29 05:10:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:10:03,687 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:10:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:10:03,777 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-29 05:10:03,777 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:10:03,779 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:10:03,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-29 05:10:03,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-29 05:10:03,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-29 05:10:03,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-29 05:10:03,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-29 05:10:03,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-29 05:10:03,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-29 05:10:03,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-29 05:10:03,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:10:03,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:10:03,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:10:03,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:10:03,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:10:03,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 05:10:03,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-29 05:10:03,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-29 05:10:03,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-29 05:10:03,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-29 05:10:03,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-29 05:10:03,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:10:04,000 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:10:04,003 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:10:04,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:10:04 BoogieIcfgContainer [2021-10-29 05:10:04,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:10:04,033 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:10:04,033 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:10:04,034 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:10:04,034 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:09:49" (3/4) ... [2021-10-29 05:10:04,037 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 05:10:04,038 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:10:04,039 INFO L168 Benchmark]: Toolchain (without parser) took 15466.61 ms. Allocated memory was 58.7 MB in the beginning and 90.2 MB in the end (delta: 31.5 MB). Free memory was 35.5 MB in the beginning and 54.6 MB in the end (delta: -19.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:10:04,039 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 58.7 MB. Free memory is still 39.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:10:04,040 INFO L168 Benchmark]: CACSL2BoogieTranslator took 614.85 ms. Allocated memory is still 58.7 MB. Free memory was 35.4 MB in the beginning and 34.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:10:04,040 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.12 ms. Allocated memory is still 58.7 MB. Free memory was 34.2 MB in the beginning and 32.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:10:04,041 INFO L168 Benchmark]: Boogie Preprocessor took 56.32 ms. Allocated memory is still 58.7 MB. Free memory was 32.3 MB in the beginning and 31.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:10:04,041 INFO L168 Benchmark]: RCFGBuilder took 585.53 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 31.0 MB in the beginning and 47.4 MB in the end (delta: -16.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:10:04,042 INFO L168 Benchmark]: TraceAbstraction took 14147.28 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 47.0 MB in the beginning and 54.6 MB in the end (delta: -7.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:10:04,042 INFO L168 Benchmark]: Witness Printer took 4.61 ms. Allocated memory is still 90.2 MB. Free memory is still 54.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:10:04,044 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 58.7 MB. Free memory is still 39.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 614.85 ms. Allocated memory is still 58.7 MB. Free memory was 35.4 MB in the beginning and 34.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.12 ms. Allocated memory is still 58.7 MB. Free memory was 34.2 MB in the beginning and 32.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.32 ms. Allocated memory is still 58.7 MB. Free memory was 32.3 MB in the beginning and 31.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 585.53 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 31.0 MB in the beginning and 47.4 MB in the end (delta: -16.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14147.28 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 47.0 MB in the beginning and 54.6 MB in the end (delta: -7.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * Witness Printer took 4.61 ms. Allocated memory is still 90.2 MB. Free memory is still 54.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 543. Possible FailurePath: [L544] TData data; [L529] pdata->lo = malloc(16) [L530] pdata->hi = malloc(24) [L534] EXPR data->lo [L534] void *lo = data->lo; [L535] EXPR data->hi [L535] void *hi = data->hi; [L536] COND FALSE !(lo == hi) [L540] data->lo = (void *) 0 [L541] data->hi = (void *) 0 [L547] return 0; [L547] return 0; - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 14.0s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 150 SDtfs, 535 SDslu, 177 SDs, 0 SdLazy, 493 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 21 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 122 ConstructedInterpolants, 18 QuantifiedInterpolants, 1183 SizeOfPredicates, 81 NumberOfNonLiveVariables, 468 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-29 05:10:04,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82dae490-e1bc-4b69-9e76-22d92bfc604b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...