./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI --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 64bit --witnessprinter.graph.data.programhash 76e89a58b9c6f7059fcf416ee7a1666558a3d440 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:28:00,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:28:00,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:28:00,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:28:00,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:28:00,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:28:00,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:28:00,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:28:00,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:28:00,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:28:00,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:28:00,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:28:00,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:28:00,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:28:00,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:28:00,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:28:00,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:28:00,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:28:00,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:28:00,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:28:00,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:28:00,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:28:00,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:28:00,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:28:00,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:28:00,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:28:00,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:28:00,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:28:00,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:28:00,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:28:00,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:28:00,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:28:00,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:28:00,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:28:00,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:28:00,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:28:00,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:28:00,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:28:00,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:28:00,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:28:00,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:28:00,585 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2021-10-11 02:28:00,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:28:00,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:28:00,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:28:00,632 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:28:00,632 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:28:00,638 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:28:00,639 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:28:00,639 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:28:00,639 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:28:00,639 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:28:00,641 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:28:00,641 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:28:00,641 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:28:00,641 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:28:00,642 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:28:00,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:28:00,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:28:00,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:28:00,644 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:28:00,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:28:00,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:28:00,645 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:28:00,645 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:28:00,645 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:28:00,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:28:00,645 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:28:00,647 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:28:00,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:28:00,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:28:00,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:28:00,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:28:00,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:28:00,649 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:28:00,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:28:00,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:28:00,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:28:00,650 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_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76e89a58b9c6f7059fcf416ee7a1666558a3d440 [2021-10-11 02:28:00,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:28:00,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:28:00,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:28:00,949 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:28:00,950 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:28:00,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2021-10-11 02:28:01,013 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/data/ee150f793/ed21ad4ecd7d4de38df4a837d2eca9d0/FLAGc620967a3 [2021-10-11 02:28:01,567 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:28:01,568 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2021-10-11 02:28:01,577 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/data/ee150f793/ed21ad4ecd7d4de38df4a837d2eca9d0/FLAGc620967a3 [2021-10-11 02:28:01,942 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/data/ee150f793/ed21ad4ecd7d4de38df4a837d2eca9d0 [2021-10-11 02:28:01,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:28:01,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:28:01,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:01,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:28:01,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:28:01,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:01" (1/1) ... [2021-10-11 02:28:01,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160ee028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:01, skipping insertion in model container [2021-10-11 02:28:01,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:01" (1/1) ... [2021-10-11 02:28:01,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:28:01,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:28:02,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:02,188 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:28:02,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:02,218 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:28:02,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02 WrapperNode [2021-10-11 02:28:02,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:02,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:02,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:28:02,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:28:02,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02" (1/1) ... [2021-10-11 02:28:02,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02" (1/1) ... [2021-10-11 02:28:02,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:02,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:28:02,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:28:02,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:28:02,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02" (1/1) ... [2021-10-11 02:28:02,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02" (1/1) ... [2021-10-11 02:28:02,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02" (1/1) ... [2021-10-11 02:28:02,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02" (1/1) ... [2021-10-11 02:28:02,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02" (1/1) ... [2021-10-11 02:28:02,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02" (1/1) ... [2021-10-11 02:28:02,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02" (1/1) ... [2021-10-11 02:28:02,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:28:02,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:28:02,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:28:02,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:28:02,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:28:02,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:28:02,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:28:02,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:28:02,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:28:02,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:28:02,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:28:02,738 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:28:02,738 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-11 02:28:02,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:02 BoogieIcfgContainer [2021-10-11 02:28:02,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:28:02,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:28:02,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:28:02,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:28:02,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:28:01" (1/3) ... [2021-10-11 02:28:02,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c848635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:02, skipping insertion in model container [2021-10-11 02:28:02,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:02" (2/3) ... [2021-10-11 02:28:02,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c848635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:02, skipping insertion in model container [2021-10-11 02:28:02,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:02" (3/3) ... [2021-10-11 02:28:02,764 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTermination3-1.c [2021-10-11 02:28:02,778 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:28:02,782 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2021-10-11 02:28:02,793 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-11 02:28:02,812 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:28:02,813 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:28:02,813 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:28:02,813 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:28:02,813 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:28:02,813 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:28:02,814 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:28:02,814 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:28:02,826 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-10-11 02:28:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:28:02,832 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:02,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:28:02,833 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:28:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:02,838 INFO L82 PathProgramCache]: Analyzing trace with hash 79124, now seen corresponding path program 1 times [2021-10-11 02:28:02,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:02,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487362541] [2021-10-11 02:28:02,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:02,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487362541] [2021-10-11 02:28:02,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:03,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:28:03,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907230715] [2021-10-11 02:28:03,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:03,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:03,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:03,042 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-10-11 02:28:03,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:03,128 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-11 02:28:03,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:03,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:28:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:03,139 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:28:03,139 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 02:28:03,151 INFO L677 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 [2021-10-11 02:28:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 02:28:03,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-11 02:28:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 02:28:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-11 02:28:03,186 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 3 [2021-10-11 02:28:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:03,187 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-11 02:28:03,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:03,188 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-11 02:28:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:28:03,188 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:03,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:28:03,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:28:03,190 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:28:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:03,192 INFO L82 PathProgramCache]: Analyzing trace with hash 79125, now seen corresponding path program 1 times [2021-10-11 02:28:03,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:03,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905818527] [2021-10-11 02:28:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:03,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905818527] [2021-10-11 02:28:03,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:03,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:28:03,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484046081] [2021-10-11 02:28:03,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:03,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:03,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:03,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:03,307 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2021-10-11 02:28:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:03,357 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-11 02:28:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:03,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:28:03,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:03,359 INFO L225 Difference]: With dead ends: 16 [2021-10-11 02:28:03,360 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:28:03,361 INFO L677 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 [2021-10-11 02:28:03,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:28:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-11 02:28:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-11 02:28:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-11 02:28:03,368 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 3 [2021-10-11 02:28:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:03,369 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-11 02:28:03,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-11 02:28:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:28:03,370 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:03,370 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-11 02:28:03,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:28:03,371 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:28:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:03,372 INFO L82 PathProgramCache]: Analyzing trace with hash 76077888, now seen corresponding path program 1 times [2021-10-11 02:28:03,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:03,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772875876] [2021-10-11 02:28:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:03,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772875876] [2021-10-11 02:28:03,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902792424] [2021-10-11 02:28:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:28:03,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:03,573 INFO L382 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 [2021-10-11 02:28:03,575 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:28:03,587 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:28:03,589 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:28:03,589 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 02:28:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:03,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:03,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872629445] [2021-10-11 02:28:03,690 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-11 02:28:03,690 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:28:03,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:28:03,699 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:28:03,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:28:04,314 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:28:04,610 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-10-11 02:28:04,686 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:28:04,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:28:04,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-10-11 02:28:04,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319221216] [2021-10-11 02:28:04,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:28:04,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:28:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:28:04,689 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2021-10-11 02:28:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:04,780 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-10-11 02:28:04,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:28:04,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2021-10-11 02:28:04,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:04,781 INFO L225 Difference]: With dead ends: 38 [2021-10-11 02:28:04,782 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:28:04,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:28:04,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:28:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 22. [2021-10-11 02:28:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:28:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-10-11 02:28:04,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2021-10-11 02:28:04,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:04,787 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-10-11 02:28:04,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:28:04,787 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-10-11 02:28:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:28:04,788 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:04,788 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-11 02:28:05,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:28:05,011 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:28:05,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1804189333, now seen corresponding path program 1 times [2021-10-11 02:28:05,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:05,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388168651] [2021-10-11 02:28:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:28:05,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388168651] [2021-10-11 02:28:05,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:05,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:28:05,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641333834] [2021-10-11 02:28:05,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:28:05,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:05,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:28:05,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:28:05,104 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2021-10-11 02:28:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:05,167 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-10-11 02:28:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:28:05,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-10-11 02:28:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:05,171 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:28:05,171 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 02:28:05,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:28:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 02:28:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-10-11 02:28:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:28:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-10-11 02:28:05,182 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2021-10-11 02:28:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:05,182 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-10-11 02:28:05,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:28:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-10-11 02:28:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:28:05,183 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:05,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:05,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-11 02:28:05,184 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:28:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash -95288389, now seen corresponding path program 1 times [2021-10-11 02:28:05,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:05,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704807632] [2021-10-11 02:28:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:28:05,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704807632] [2021-10-11 02:28:05,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:05,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:28:05,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581026269] [2021-10-11 02:28:05,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:05,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:05,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:05,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:05,225 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2021-10-11 02:28:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:05,235 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-10-11 02:28:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:05,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-10-11 02:28:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:05,237 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:28:05,237 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:28:05,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:28:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 02:28:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:28:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-10-11 02:28:05,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2021-10-11 02:28:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:05,242 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-10-11 02:28:05,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-10-11 02:28:05,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:28:05,243 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:05,243 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:05,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-11 02:28:05,244 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:28:05,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:05,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1341025486, now seen corresponding path program 1 times [2021-10-11 02:28:05,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:05,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971724628] [2021-10-11 02:28:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:05,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971724628] [2021-10-11 02:28:05,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520161141] [2021-10-11 02:28:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:05,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:28:05,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:05,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:05,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600509739] [2021-10-11 02:28:05,417 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:28:05,418 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:28:05,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:28:05,418 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:28:05,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:28:05,766 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:28:06,035 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-10-11 02:28:06,260 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-10-11 02:28:06,440 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-10-11 02:28:06,631 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2021-10-11 02:28:06,786 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:28:06,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:28:06,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-10-11 02:28:06,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760509855] [2021-10-11 02:28:06,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:28:06,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:06,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:28:06,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:28:06,789 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 9 states. [2021-10-11 02:28:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:06,829 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-11 02:28:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:28:06,830 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2021-10-11 02:28:06,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:06,832 INFO L225 Difference]: With dead ends: 26 [2021-10-11 02:28:06,833 INFO L226 Difference]: Without dead ends: 26 [2021-10-11 02:28:06,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:28:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-11 02:28:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-10-11 02:28:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-11 02:28:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-10-11 02:28:06,848 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2021-10-11 02:28:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:06,849 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-10-11 02:28:06,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:28:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-10-11 02:28:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:28:06,850 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:06,850 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2021-10-11 02:28:07,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-11 02:28:07,066 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:28:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash 79779137, now seen corresponding path program 2 times [2021-10-11 02:28:07,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:07,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198737816] [2021-10-11 02:28:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:07,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198737816] [2021-10-11 02:28:07,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123533873] [2021-10-11 02:28:07,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:07,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:28:07,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:28:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:28:07,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-11 02:28:07,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-11 02:28:07,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:28:07,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 12 [2021-10-11 02:28:07,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234267412] [2021-10-11 02:28:07,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:28:07,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:07,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:28:07,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:28:07,368 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2021-10-11 02:28:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:07,395 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-10-11 02:28:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:28:07,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-10-11 02:28:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:07,396 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:28:07,396 INFO L226 Difference]: Without dead ends: 24 [2021-10-11 02:28:07,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:28:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-11 02:28:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-11 02:28:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 02:28:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-11 02:28:07,400 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 11 [2021-10-11 02:28:07,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:07,400 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-11 02:28:07,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:28:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-10-11 02:28:07,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:28:07,401 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:07,401 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:07,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:07,630 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:28:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:07,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1638817542, now seen corresponding path program 2 times [2021-10-11 02:28:07,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:07,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329017732] [2021-10-11 02:28:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:07,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329017732] [2021-10-11 02:28:07,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995994768] [2021-10-11 02:28:07,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:07,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:28:07,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:28:07,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:28:07,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:28:07,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:28:07,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:28:07,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2021-10-11 02:28:07,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816747607] [2021-10-11 02:28:07,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:28:07,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:07,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:28:07,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:28:07,871 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2021-10-11 02:28:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:07,894 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-10-11 02:28:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:28:07,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-10-11 02:28:07,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:07,895 INFO L225 Difference]: With dead ends: 23 [2021-10-11 02:28:07,895 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:28:07,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:28:07,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:28:07,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 02:28:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:28:07,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-11 02:28:07,898 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2021-10-11 02:28:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:07,899 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-11 02:28:07,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:28:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-11 02:28:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:28:07,900 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:07,900 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:08,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:08,126 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:28:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1638983057, now seen corresponding path program 1 times [2021-10-11 02:28:08,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:08,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801161765] [2021-10-11 02:28:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:08,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801161765] [2021-10-11 02:28:08,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247407466] [2021-10-11 02:28:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:08,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:28:08,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:08,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:08,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [312543250] [2021-10-11 02:28:08,425 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:28:08,425 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:28:08,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:28:08,426 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:28:08,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:28:08,729 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:28:08,921 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-10-11 02:28:09,289 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-10-11 02:28:09,446 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-10-11 02:28:09,615 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:28:09,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:28:09,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2021-10-11 02:28:09,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13802139] [2021-10-11 02:28:09,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:28:09,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:09,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:28:09,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-10-11 02:28:09,617 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 13 states. [2021-10-11 02:28:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:09,658 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-11 02:28:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:28:09,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2021-10-11 02:28:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:09,659 INFO L225 Difference]: With dead ends: 28 [2021-10-11 02:28:09,659 INFO L226 Difference]: Without dead ends: 28 [2021-10-11 02:28:09,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-10-11 02:28:09,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-11 02:28:09,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-11 02:28:09,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:28:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-11 02:28:09,662 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 19 [2021-10-11 02:28:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:09,663 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-11 02:28:09,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:28:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-11 02:28:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-11 02:28:09,664 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:09,664 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:09,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-11 02:28:09,878 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:28:09,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:09,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1006723739, now seen corresponding path program 2 times [2021-10-11 02:28:09,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:09,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999791776] [2021-10-11 02:28:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:28:09,946 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:28:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:28:10,006 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:28:10,035 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:28:10,035 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:28:10,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-10-11 02:28:10,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:28:10 BoogieIcfgContainer [2021-10-11 02:28:10,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:28:10,074 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:28:10,074 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:28:10,074 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:28:10,074 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:02" (3/4) ... [2021-10-11 02:28:10,076 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:28:10,123 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96768e9a-188f-4b99-8b2d-9c3be05e2613/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:28:10,127 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:28:10,128 INFO L168 Benchmark]: Toolchain (without parser) took 8182.26 ms. Allocated memory was 102.8 MB in the beginning and 163.6 MB in the end (delta: 60.8 MB). Free memory was 73.6 MB in the beginning and 64.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 70.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:10,128 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 102.8 MB. Free memory is still 59.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:28:10,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.93 ms. Allocated memory is still 102.8 MB. Free memory was 73.3 MB in the beginning and 79.0 MB in the end (delta: -5.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:10,128 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.88 ms. Allocated memory is still 102.8 MB. Free memory was 79.0 MB in the beginning and 77.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:28:10,129 INFO L168 Benchmark]: Boogie Preprocessor took 22.29 ms. Allocated memory is still 102.8 MB. Free memory was 77.8 MB in the beginning and 76.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:10,129 INFO L168 Benchmark]: RCFGBuilder took 465.43 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 60.1 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:10,129 INFO L168 Benchmark]: TraceAbstraction took 7331.56 ms. Allocated memory was 102.8 MB in the beginning and 163.6 MB in the end (delta: 60.8 MB). Free memory was 59.4 MB in the beginning and 66.4 MB in the end (delta: -7.1 MB). Peak memory consumption was 56.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:10,130 INFO L168 Benchmark]: Witness Printer took 53.11 ms. Allocated memory is still 163.6 MB. Free memory was 66.4 MB in the beginning and 64.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:10,132 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 102.8 MB. Free memory is still 59.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.93 ms. Allocated memory is still 102.8 MB. Free memory was 73.3 MB in the beginning and 79.0 MB in the end (delta: -5.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.88 ms. Allocated memory is still 102.8 MB. Free memory was 79.0 MB in the beginning and 77.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.29 ms. Allocated memory is still 102.8 MB. Free memory was 77.8 MB in the beginning and 76.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 465.43 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 60.1 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7331.56 ms. Allocated memory was 102.8 MB in the beginning and 163.6 MB in the end (delta: 60.8 MB). Free memory was 59.4 MB in the beginning and 66.4 MB in the end (delta: -7.1 MB). Peak memory consumption was 56.3 MB. Max. memory is 16.1 GB. * Witness Printer took 53.11 ms. Allocated memory is still 163.6 MB. Free memory was 66.4 MB in the beginning and 64.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int i = __VERIFIER_nondet_int(); [L11] int a[10]; [L13] int n = 0; [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND FALSE !(n < 10) [L17] 0 <= i && i < 10 && a[i] >= 0 [L17] EXPR a[i] [L17] 0 <= i && i < 10 && a[i] >= 0 [L17] COND TRUE 0 <= i && i < 10 && a[i] >= 0 [L18] i = __VERIFIER_nondet_int() [L20] a[i] = 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.2s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 103 SDslu, 95 SDs, 0 SdLazy, 177 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=9, 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, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 182 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 201 ConstructedInterpolants, 1 QuantifiedInterpolants, 17252 SizeOfPredicates, 1 NumberOfNonLiveVariables, 240 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 19 InterpolantComputations, 7 PerfectInterpolantSequences, 124/302 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...