./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/nested6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3a725921be8310e882457f7f33c9ff7dbee0bc2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3a725921be8310e882457f7f33c9ff7dbee0bc2 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:58:02,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:58:02,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:58:02,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:58:02,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:58:02,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:58:02,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:58:02,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:58:02,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:58:02,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:58:02,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:58:02,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:58:02,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:58:02,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:58:02,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:58:02,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:58:02,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:58:02,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:58:02,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:58:02,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:58:02,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:58:02,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:58:02,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:58:02,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:58:02,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:58:02,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:58:02,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:58:02,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:58:02,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:58:02,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:58:02,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:58:02,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:58:02,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:58:02,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:58:02,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:58:02,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:58:02,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:58:02,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:58:02,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:58:02,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:58:02,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:58:02,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:58:02,632 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:58:02,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:58:02,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:58:02,640 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:58:02,640 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:58:02,640 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:58:02,640 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:58:02,641 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:58:02,647 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:58:02,647 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:58:02,647 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:58:02,647 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:58:02,647 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:58:02,648 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:58:02,648 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:58:02,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:58:02,649 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:58:02,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:58:02,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:58:02,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:58:02,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:58:02,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:58:02,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:58:02,650 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:58:02,650 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:58:02,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:58:02,651 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:58:02,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:58:02,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:58:02,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:58:02,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:58:02,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:58:02,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:58:02,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:58:02,652 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:58:02,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:58:02,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:58:02,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:58:02,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:58:02,653 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_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3a725921be8310e882457f7f33c9ff7dbee0bc2 [2021-10-13 06:58:02,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:58:02,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:58:02,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:58:02,914 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:58:02,915 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:58:02,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-invgen/nested6.i [2021-10-13 06:58:02,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/data/e14fca0ac/c88293f83fa741dcbc117f5a6ab36339/FLAG31a8ca6dc [2021-10-13 06:58:03,411 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:58:03,412 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/sv-benchmarks/c/loop-invgen/nested6.i [2021-10-13 06:58:03,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/data/e14fca0ac/c88293f83fa741dcbc117f5a6ab36339/FLAG31a8ca6dc [2021-10-13 06:58:03,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/data/e14fca0ac/c88293f83fa741dcbc117f5a6ab36339 [2021-10-13 06:58:03,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:58:03,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:58:03,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:58:03,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:58:03,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:58:03,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:58:03" (1/1) ... [2021-10-13 06:58:03,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61f989fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:03, skipping insertion in model container [2021-10-13 06:58:03,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:58:03" (1/1) ... [2021-10-13 06:58:03,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:58:03,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:58:04,009 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-13 06:58:04,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:58:04,030 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:58:04,043 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-13 06:58:04,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:58:04,061 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:58:04,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04 WrapperNode [2021-10-13 06:58:04,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:58:04,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:58:04,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:58:04,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:58:04,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04" (1/1) ... [2021-10-13 06:58:04,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04" (1/1) ... [2021-10-13 06:58:04,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:58:04,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:58:04,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:58:04,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:58:04,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04" (1/1) ... [2021-10-13 06:58:04,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04" (1/1) ... [2021-10-13 06:58:04,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04" (1/1) ... [2021-10-13 06:58:04,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04" (1/1) ... [2021-10-13 06:58:04,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04" (1/1) ... [2021-10-13 06:58:04,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04" (1/1) ... [2021-10-13 06:58:04,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04" (1/1) ... [2021-10-13 06:58:04,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:58:04,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:58:04,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:58:04,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:58:04,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04" (1/1) ... [2021-10-13 06:58:04,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:58:04,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:04,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:58:04,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:58:04,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:58:04,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:58:04,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:58:04,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:58:04,432 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:58:04,432 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 06:58:04,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:04 BoogieIcfgContainer [2021-10-13 06:58:04,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:58:04,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:58:04,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:58:04,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:58:04,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:58:03" (1/3) ... [2021-10-13 06:58:04,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ef2da9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:58:04, skipping insertion in model container [2021-10-13 06:58:04,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:04" (2/3) ... [2021-10-13 06:58:04,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ef2da9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:58:04, skipping insertion in model container [2021-10-13 06:58:04,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:04" (3/3) ... [2021-10-13 06:58:04,445 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2021-10-13 06:58:04,450 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:58:04,450 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 06:58:04,500 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:58:04,507 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-10-13 06:58:04,507 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 06:58:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 21 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) [2021-10-13 06:58:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 06:58:04,548 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:04,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:04,549 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:04,555 INFO L82 PathProgramCache]: Analyzing trace with hash -885669119, now seen corresponding path program 1 times [2021-10-13 06:58:04,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:58:04,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725023549] [2021-10-13 06:58:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:04,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:58:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:04,824 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:58:04,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725023549] [2021-10-13 06:58:04,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725023549] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:04,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:04,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 06:58:04,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488236023] [2021-10-13 06:58:04,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:58:04,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:58:04,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:58:04,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:58:04,848 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 21 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) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-10-13 06:58:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:04,949 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2021-10-13 06:58:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:58:04,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-10-13 06:58:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:04,960 INFO L225 Difference]: With dead ends: 50 [2021-10-13 06:58:04,960 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 06:58:04,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:58:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 06:58:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-10-13 06:58:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 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) [2021-10-13 06:58:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-10-13 06:58:05,000 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2021-10-13 06:58:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:05,001 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-10-13 06:58:05,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-10-13 06:58:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-10-13 06:58:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 06:58:05,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:05,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:05,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 06:58:05,003 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:05,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:05,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1686703451, now seen corresponding path program 1 times [2021-10-13 06:58:05,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:58:05,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295823818] [2021-10-13 06:58:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:05,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:58:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:05,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:58:05,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295823818] [2021-10-13 06:58:05,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295823818] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:05,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:05,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 06:58:05,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743805791] [2021-10-13 06:58:05,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:58:05,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:58:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:58:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:58:05,072 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-10-13 06:58:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:05,228 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-10-13 06:58:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 06:58:05,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 9 [2021-10-13 06:58:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:05,232 INFO L225 Difference]: With dead ends: 32 [2021-10-13 06:58:05,232 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 06:58:05,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:58:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 06:58:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 15. [2021-10-13 06:58:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-10-13 06:58:05,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-10-13 06:58:05,246 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-10-13 06:58:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:05,246 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-10-13 06:58:05,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-10-13 06:58:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-10-13 06:58:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 06:58:05,247 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:05,248 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:05,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 06:58:05,248 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:05,251 INFO L82 PathProgramCache]: Analyzing trace with hash -724341724, now seen corresponding path program 1 times [2021-10-13 06:58:05,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:58:05,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602460366] [2021-10-13 06:58:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:05,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:58:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:05,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:58:05,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602460366] [2021-10-13 06:58:05,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602460366] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:05,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:05,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 06:58:05,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982985527] [2021-10-13 06:58:05,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:58:05,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:58:05,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:58:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:58:05,378 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 06:58:05,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:05,438 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-10-13 06:58:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:58:05,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-10-13 06:58:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:05,439 INFO L225 Difference]: With dead ends: 32 [2021-10-13 06:58:05,439 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 06:58:05,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:58:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 06:58:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-10-13 06:58:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2021-10-13 06:58:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-13 06:58:05,447 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 10 [2021-10-13 06:58:05,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:05,448 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-13 06:58:05,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 06:58:05,448 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-13 06:58:05,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 06:58:05,449 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:05,449 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:05,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 06:58:05,450 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:05,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:05,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1122860341, now seen corresponding path program 1 times [2021-10-13 06:58:05,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:58:05,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672073454] [2021-10-13 06:58:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:05,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:58:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:05,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:58:05,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672073454] [2021-10-13 06:58:05,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672073454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:58:05,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737994186] [2021-10-13 06:58:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:05,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:05,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:05,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:58:05,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:58:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:05,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:58:05,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:05,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:05,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737994186] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:05,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 06:58:05,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 9 [2021-10-13 06:58:05,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683549886] [2021-10-13 06:58:05,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 06:58:05,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:58:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 06:58:05,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 06:58:05,856 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-10-13 06:58:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:06,015 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-10-13 06:58:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 06:58:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 [2021-10-13 06:58:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:06,017 INFO L225 Difference]: With dead ends: 74 [2021-10-13 06:58:06,017 INFO L226 Difference]: Without dead ends: 55 [2021-10-13 06:58:06,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-10-13 06:58:06,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-13 06:58:06,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 25. [2021-10-13 06:58:06,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 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) [2021-10-13 06:58:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-10-13 06:58:06,032 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 14 [2021-10-13 06:58:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:06,032 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-10-13 06:58:06,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-10-13 06:58:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-10-13 06:58:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 06:58:06,033 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:06,033 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:06,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:06,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:06,234 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:06,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:06,235 INFO L82 PathProgramCache]: Analyzing trace with hash -113403786, now seen corresponding path program 1 times [2021-10-13 06:58:06,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:58:06,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600024289] [2021-10-13 06:58:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:06,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:58:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:06,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:58:06,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600024289] [2021-10-13 06:58:06,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600024289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:58:06,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063141865] [2021-10-13 06:58:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:06,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:06,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:06,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:58:06,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 06:58:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:06,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:58:06,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:06,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:06,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063141865] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:06,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918766731] [2021-10-13 06:58:06,638 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-13 06:58:06,638 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:58:06,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:58:06,649 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:58:06,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:58:06,690 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:06,694 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:58:06,694 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:06,695 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 06:58:06,698 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:58:06,699 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:06,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 06:58:06,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-13 06:58:06,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:58:06,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:58:06,757 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 06:58:06,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 06:58:06,759 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:06,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 06:58:06,766 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:06,767 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 06:58:06,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:58:06,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:58:06,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:06,782 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:58:06,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-13 06:58:06,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:58:06,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:102, output treesize:90 [2021-10-13 06:58:06,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:07,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:07,002 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_8| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 06:58:07,005 INFO L168 Benchmark]: Toolchain (without parser) took 3191.33 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 70.2 MB in the beginning and 80.6 MB in the end (delta: -10.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:58:07,005 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory is still 53.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:58:07,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.70 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 70.0 MB in the beginning and 101.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:58:07,006 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.24 ms. Allocated memory is still 125.8 MB. Free memory was 101.4 MB in the beginning and 99.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:58:07,007 INFO L168 Benchmark]: Boogie Preprocessor took 21.85 ms. Allocated memory is still 125.8 MB. Free memory was 99.9 MB in the beginning and 98.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:58:07,007 INFO L168 Benchmark]: RCFGBuilder took 313.87 ms. Allocated memory is still 125.8 MB. Free memory was 98.8 MB in the beginning and 87.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:58:07,008 INFO L168 Benchmark]: TraceAbstraction took 2567.46 ms. Allocated memory is still 125.8 MB. Free memory was 87.3 MB in the beginning and 80.6 MB in the end (delta: 6.7 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:58:07,010 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 98.6 MB. Free memory is still 53.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 242.70 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 70.0 MB in the beginning and 101.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.24 ms. Allocated memory is still 125.8 MB. Free memory was 101.4 MB in the beginning and 99.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.85 ms. Allocated memory is still 125.8 MB. Free memory was 99.9 MB in the beginning and 98.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 313.87 ms. Allocated memory is still 125.8 MB. Free memory was 98.8 MB in the beginning and 87.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2567.46 ms. Allocated memory is still 125.8 MB. Free memory was 87.3 MB in the beginning and 80.6 MB in the end (delta: 6.7 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_8| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_8|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 06:58:07,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/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-4e77c04 [2021-10-13 06:58:09,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:58:09,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:58:09,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:58:09,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:58:09,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:58:09,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:58:09,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:58:09,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:58:09,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:58:09,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:58:09,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:58:09,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:58:09,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:58:09,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:58:09,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:58:09,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:58:09,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:58:09,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:58:09,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:58:09,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:58:09,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:58:09,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:58:09,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:58:09,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:58:09,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:58:09,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:58:09,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:58:09,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:58:09,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:58:09,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:58:09,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:58:09,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:58:09,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:58:09,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:58:09,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:58:09,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:58:09,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:58:09,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:58:09,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:58:09,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:58:09,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:58:09,541 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:58:09,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:58:09,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:58:09,543 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:58:09,543 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:58:09,543 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:58:09,543 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:58:09,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:58:09,544 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:58:09,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:58:09,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:58:09,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:58:09,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:58:09,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:58:09,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:58:09,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:58:09,546 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:58:09,546 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:58:09,546 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:58:09,547 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:58:09,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:58:09,547 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:58:09,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:58:09,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:58:09,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:58:09,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:58:09,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:58:09,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:58:09,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:58:09,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:58:09,549 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:58:09,549 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:58:09,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:58:09,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:58:09,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:58:09,550 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_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3a725921be8310e882457f7f33c9ff7dbee0bc2 [2021-10-13 06:58:09,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:58:09,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:58:09,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:58:09,908 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:58:09,908 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:58:09,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-invgen/nested6.i [2021-10-13 06:58:09,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/data/77dbc1869/6e47c0775a7d46628268ca088dfaee31/FLAG6a4bc09a7 [2021-10-13 06:58:10,530 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:58:10,531 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/sv-benchmarks/c/loop-invgen/nested6.i [2021-10-13 06:58:10,537 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/data/77dbc1869/6e47c0775a7d46628268ca088dfaee31/FLAG6a4bc09a7 [2021-10-13 06:58:10,903 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/data/77dbc1869/6e47c0775a7d46628268ca088dfaee31 [2021-10-13 06:58:10,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:58:10,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:58:10,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:58:10,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:58:10,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:58:10,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:58:10" (1/1) ... [2021-10-13 06:58:10,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e238d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:10, skipping insertion in model container [2021-10-13 06:58:10,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:58:10" (1/1) ... [2021-10-13 06:58:10,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:58:10,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:58:11,087 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-13 06:58:11,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:58:11,111 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:58:11,124 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-13 06:58:11,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:58:11,175 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:58:11,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11 WrapperNode [2021-10-13 06:58:11,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:58:11,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:58:11,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:58:11,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:58:11,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11" (1/1) ... [2021-10-13 06:58:11,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11" (1/1) ... [2021-10-13 06:58:11,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:58:11,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:58:11,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:58:11,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:58:11,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11" (1/1) ... [2021-10-13 06:58:11,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11" (1/1) ... [2021-10-13 06:58:11,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11" (1/1) ... [2021-10-13 06:58:11,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11" (1/1) ... [2021-10-13 06:58:11,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11" (1/1) ... [2021-10-13 06:58:11,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11" (1/1) ... [2021-10-13 06:58:11,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11" (1/1) ... [2021-10-13 06:58:11,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:58:11,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:58:11,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:58:11,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:58:11,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11" (1/1) ... [2021-10-13 06:58:11,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:58:11,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:11,299 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:58:11,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:58:11,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:58:11,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:58:11,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:58:11,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:58:11,571 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:58:11,571 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 06:58:11,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:11 BoogieIcfgContainer [2021-10-13 06:58:11,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:58:11,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:58:11,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:58:11,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:58:11,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:58:10" (1/3) ... [2021-10-13 06:58:11,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55fef9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:58:11, skipping insertion in model container [2021-10-13 06:58:11,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:11" (2/3) ... [2021-10-13 06:58:11,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55fef9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:58:11, skipping insertion in model container [2021-10-13 06:58:11,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:11" (3/3) ... [2021-10-13 06:58:11,581 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2021-10-13 06:58:11,586 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:58:11,587 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 06:58:11,632 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:58:11,639 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-10-13 06:58:11,639 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 06:58:11,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 25 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) [2021-10-13 06:58:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 06:58:11,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:11,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:11,659 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1094943316, now seen corresponding path program 1 times [2021-10-13 06:58:11,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:11,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602672631] [2021-10-13 06:58:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:11,692 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:11,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:11,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:11,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:58:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:11,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:58:11,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:11,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:12,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:12,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602672631] [2021-10-13 06:58:12,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602672631] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:12,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:12,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:58:12,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817154671] [2021-10-13 06:58:12,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:58:12,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:12,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:58:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:58:12,111 INFO L87 Difference]: Start difference. First operand has 26 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 25 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) Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-10-13 06:58:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:12,330 INFO L93 Difference]: Finished difference Result 89 states and 130 transitions. [2021-10-13 06:58:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 06:58:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 10 [2021-10-13 06:58:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:12,341 INFO L225 Difference]: With dead ends: 89 [2021-10-13 06:58:12,342 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 06:58:12,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 06:58:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 06:58:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2021-10-13 06:58:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-10-13 06:58:12,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-13 06:58:12,380 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2021-10-13 06:58:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:12,380 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-13 06:58:12,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-10-13 06:58:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-13 06:58:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 06:58:12,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:12,382 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:12,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:12,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:58:12,593 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:12,598 INFO L82 PathProgramCache]: Analyzing trace with hash 415731034, now seen corresponding path program 1 times [2021-10-13 06:58:12,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:12,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40318717] [2021-10-13 06:58:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:12,602 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:12,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:12,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:12,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:58:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:12,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:58:12,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:12,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:12,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:12,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40318717] [2021-10-13 06:58:12,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40318717] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:12,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:58:12,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-13 06:58:12,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088850038] [2021-10-13 06:58:12,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 06:58:12,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:12,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 06:58:12,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 06:58:12,904 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2021-10-13 06:58:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:13,926 INFO L93 Difference]: Finished difference Result 228 states and 303 transitions. [2021-10-13 06:58:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 06:58:13,927 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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 11 [2021-10-13 06:58:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:13,932 INFO L225 Difference]: With dead ends: 228 [2021-10-13 06:58:13,932 INFO L226 Difference]: Without dead ends: 226 [2021-10-13 06:58:13,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 487.7ms TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 06:58:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-10-13 06:58:13,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 50. [2021-10-13 06:58:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 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) [2021-10-13 06:58:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2021-10-13 06:58:13,972 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 11 [2021-10-13 06:58:13,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:13,972 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2021-10-13 06:58:13,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2021-10-13 06:58:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2021-10-13 06:58:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 06:58:13,974 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:13,974 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:13,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:14,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:58:14,186 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:14,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435036, now seen corresponding path program 1 times [2021-10-13 06:58:14,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:14,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312615862] [2021-10-13 06:58:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:14,188 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:14,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:14,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:14,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 06:58:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:14,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:58:14,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:14,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:14,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:14,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312615862] [2021-10-13 06:58:14,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312615862] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:14,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [187668223] [2021-10-13 06:58:14,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:14,542 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:58:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:58:14,547 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:58:14,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 06:58:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:14,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:58:14,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:14,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:14,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [187668223] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:58:14,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 06:58:14,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [6, 6] total 17 [2021-10-13 06:58:14,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993206248] [2021-10-13 06:58:14,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 06:58:14,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:14,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 06:58:14,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-13 06:58:14,981 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-10-13 06:58:15,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:15,349 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2021-10-13 06:58:15,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 06:58:15,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) Word has length 16 [2021-10-13 06:58:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:15,351 INFO L225 Difference]: With dead ends: 111 [2021-10-13 06:58:15,351 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 06:58:15,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-13 06:58:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 06:58:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2021-10-13 06:58:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 50 states have internal predecessors, (64), 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) [2021-10-13 06:58:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-10-13 06:58:15,364 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 16 [2021-10-13 06:58:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:15,364 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-10-13 06:58:15,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-10-13 06:58:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-10-13 06:58:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 06:58:15,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:15,366 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:15,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:15,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-13 06:58:15,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:58:15,784 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:15,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1368262970, now seen corresponding path program 1 times [2021-10-13 06:58:15,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:15,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239127167] [2021-10-13 06:58:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:15,785 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:15,786 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:15,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:58:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:15,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:58:15,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:16,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:16,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:16,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239127167] [2021-10-13 06:58:16,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239127167] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:16,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1415838660] [2021-10-13 06:58:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:16,320 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:58:16,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:58:16,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:58:16,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 06:58:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:16,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:58:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:16,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:16,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1415838660] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:16,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974439989] [2021-10-13 06:58:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:16,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:16,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:16,727 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:58:16,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 06:58:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:16,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 06:58:16,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:16,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:17,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974439989] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:17,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:58:17,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 10] total 18 [2021-10-13 06:58:17,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035877385] [2021-10-13 06:58:17,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 06:58:17,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:17,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 06:58:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-13 06:58:17,337 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 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) [2021-10-13 06:58:23,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:23,237 INFO L93 Difference]: Finished difference Result 370 states and 463 transitions. [2021-10-13 06:58:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-10-13 06:58:23,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 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) Word has length 17 [2021-10-13 06:58:23,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:23,240 INFO L225 Difference]: With dead ends: 370 [2021-10-13 06:58:23,240 INFO L226 Difference]: Without dead ends: 368 [2021-10-13 06:58:23,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4731 ImplicationChecksByTransitivity, 5037.3ms TimeCoverageRelationStatistics Valid=2519, Invalid=9037, Unknown=0, NotChecked=0, Total=11556 [2021-10-13 06:58:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-10-13 06:58:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 91. [2021-10-13 06:58:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.3820224719101124) internal successors, (123), 90 states have internal predecessors, (123), 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) [2021-10-13 06:58:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2021-10-13 06:58:23,268 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 17 [2021-10-13 06:58:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:23,269 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2021-10-13 06:58:23,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 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) [2021-10-13 06:58:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2021-10-13 06:58:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 06:58:23,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:23,271 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:23,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:23,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:23,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-13 06:58:23,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:58:23,882 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash -856675865, now seen corresponding path program 1 times [2021-10-13 06:58:23,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:23,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926443703] [2021-10-13 06:58:23,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:23,883 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:23,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:23,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:23,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 06:58:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:23,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:58:23,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:24,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:24,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:24,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926443703] [2021-10-13 06:58:24,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926443703] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:24,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1836152804] [2021-10-13 06:58:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:24,370 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:58:24,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:58:24,373 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:58:24,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 06:58:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:24,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:58:24,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:24,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:25,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1836152804] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:25,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701180787] [2021-10-13 06:58:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:25,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:25,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:25,070 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:58:25,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 06:58:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:25,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:58:25,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:25,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:25,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701180787] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:25,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:58:25,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9, 6, 9, 6] total 21 [2021-10-13 06:58:25,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362775850] [2021-10-13 06:58:25,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 06:58:25,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 06:58:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-13 06:58:25,505 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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) [2021-10-13 06:58:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:31,949 INFO L93 Difference]: Finished difference Result 247 states and 336 transitions. [2021-10-13 06:58:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-10-13 06:58:31,949 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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 19 [2021-10-13 06:58:31,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:31,951 INFO L225 Difference]: With dead ends: 247 [2021-10-13 06:58:31,951 INFO L226 Difference]: Without dead ends: 196 [2021-10-13 06:58:31,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 5835.2ms TimeCoverageRelationStatistics Valid=1437, Invalid=7493, Unknown=0, NotChecked=0, Total=8930 [2021-10-13 06:58:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-13 06:58:31,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 79. [2021-10-13 06:58:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3461538461538463) internal successors, (105), 78 states have internal predecessors, (105), 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) [2021-10-13 06:58:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2021-10-13 06:58:31,976 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 19 [2021-10-13 06:58:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:31,976 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2021-10-13 06:58:31,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 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) [2021-10-13 06:58:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2021-10-13 06:58:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 06:58:31,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:31,978 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:31,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:32,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:32,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:32,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:32,596 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2028882574, now seen corresponding path program 1 times [2021-10-13 06:58:32,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:32,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440880005] [2021-10-13 06:58:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:32,598 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:32,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:32,600 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:32,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 06:58:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:32,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:58:32,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:32,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:33,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:33,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440880005] [2021-10-13 06:58:33,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440880005] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:33,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1805454573] [2021-10-13 06:58:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:33,208 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:58:33,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:58:33,214 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:58:33,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 06:58:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:33,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:58:33,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:33,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:33,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1805454573] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:33,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518695868] [2021-10-13 06:58:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:33,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:33,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:33,723 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:58:33,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 06:58:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:33,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 06:58:33,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:34,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:34,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518695868] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:34,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:58:34,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2021-10-13 06:58:34,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647258051] [2021-10-13 06:58:34,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 06:58:34,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:34,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 06:58:34,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-13 06:58:34,252 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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) [2021-10-13 06:58:39,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:39,341 INFO L93 Difference]: Finished difference Result 319 states and 407 transitions. [2021-10-13 06:58:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-13 06:58:39,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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) Word has length 20 [2021-10-13 06:58:39,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:39,344 INFO L225 Difference]: With dead ends: 319 [2021-10-13 06:58:39,344 INFO L226 Difference]: Without dead ends: 317 [2021-10-13 06:58:39,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 3856.0ms TimeCoverageRelationStatistics Valid=2134, Invalid=8168, Unknown=0, NotChecked=0, Total=10302 [2021-10-13 06:58:39,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-10-13 06:58:39,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 116. [2021-10-13 06:58:39,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.3478260869565217) internal successors, (155), 115 states have internal predecessors, (155), 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) [2021-10-13 06:58:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2021-10-13 06:58:39,380 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 20 [2021-10-13 06:58:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:39,381 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2021-10-13 06:58:39,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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) [2021-10-13 06:58:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2021-10-13 06:58:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 06:58:39,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:39,382 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:39,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:39,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:39,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-13 06:58:39,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:58:39,998 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash -766953900, now seen corresponding path program 1 times [2021-10-13 06:58:39,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:39,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555789682] [2021-10-13 06:58:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:39,999 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:39,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:40,000 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:40,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 06:58:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:40,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:58:40,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:40,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:40,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:40,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555789682] [2021-10-13 06:58:40,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555789682] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:40,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1432879938] [2021-10-13 06:58:40,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:40,617 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:58:40,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:58:40,625 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:58:40,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 06:58:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:40,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:58:40,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:41,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:41,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1432879938] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:41,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032779824] [2021-10-13 06:58:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:41,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:41,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:41,129 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:58:41,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 06:58:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:41,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 06:58:41,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:41,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:58:41,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032779824] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:41,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:58:41,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2021-10-13 06:58:41,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101962264] [2021-10-13 06:58:41,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 06:58:41,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 06:58:41,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-13 06:58:41,691 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 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) [2021-10-13 06:58:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:44,456 INFO L93 Difference]: Finished difference Result 195 states and 247 transitions. [2021-10-13 06:58:44,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-13 06:58:44,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 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 23 [2021-10-13 06:58:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:44,458 INFO L225 Difference]: With dead ends: 195 [2021-10-13 06:58:44,458 INFO L226 Difference]: Without dead ends: 193 [2021-10-13 06:58:44,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 2303.9ms TimeCoverageRelationStatistics Valid=1150, Invalid=3140, Unknown=0, NotChecked=0, Total=4290 [2021-10-13 06:58:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-10-13 06:58:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 112. [2021-10-13 06:58:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 111 states have internal predecessors, (144), 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) [2021-10-13 06:58:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2021-10-13 06:58:44,486 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 23 [2021-10-13 06:58:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:44,487 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2021-10-13 06:58:44,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 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) [2021-10-13 06:58:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2021-10-13 06:58:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 06:58:44,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:58:44,489 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:58:44,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:44,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:44,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-13 06:58:45,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:45,091 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:58:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:58:45,092 INFO L82 PathProgramCache]: Analyzing trace with hash 890253013, now seen corresponding path program 1 times [2021-10-13 06:58:45,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:58:45,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289399322] [2021-10-13 06:58:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:45,093 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:58:45,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:58:45,094 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:58:45,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 06:58:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:45,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 06:58:45,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:58:45,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:58:46,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:58:46,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289399322] [2021-10-13 06:58:46,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289399322] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:46,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [767748523] [2021-10-13 06:58:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:46,059 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:58:46,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:58:46,063 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:58:46,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-13 06:58:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:46,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:58:46,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 06:58:46,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 06:58:47,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [767748523] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:47,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430621987] [2021-10-13 06:58:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:58:47,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:58:47,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:58:47,109 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:58:47,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 06:58:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:58:47,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:58:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:58:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 06:58:47,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:58:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 06:58:47,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430621987] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:58:47,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:58:47,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8, 7, 8, 7] total 29 [2021-10-13 06:58:47,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557068593] [2021-10-13 06:58:47,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 06:58:47,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:58:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 06:58:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-10-13 06:58:47,805 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 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) [2021-10-13 06:58:58,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:58:58,843 INFO L93 Difference]: Finished difference Result 396 states and 519 transitions. [2021-10-13 06:58:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-10-13 06:58:58,844 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 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 32 [2021-10-13 06:58:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:58:58,844 INFO L225 Difference]: With dead ends: 396 [2021-10-13 06:58:58,844 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 06:58:58,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9723 ImplicationChecksByTransitivity, 9422.8ms TimeCoverageRelationStatistics Valid=4081, Invalid=20411, Unknown=0, NotChecked=0, Total=24492 [2021-10-13 06:58:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 06:58:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 06:58:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-13 06:58:58,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 06:58:58,853 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-10-13 06:58:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:58:58,854 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 06:58:58,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 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) [2021-10-13 06:58:58,854 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 06:58:58,854 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 06:58:58,857 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:58:58,857 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:58:58,857 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:58:58,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:59,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-13 06:58:59,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-13 06:58:59,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:58:59,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 06:58:59,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:58:59,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:58:59,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:59:00,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:59:00,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:59:00,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:59:01,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:59:02,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:59:15,164 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-13 06:59:15,165 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-13 06:59:15,165 INFO L857 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-10-13 06:59:15,165 INFO L857 garLoopResultBuilder]: For program point L19-2(line 19) no Hoare annotation was computed. [2021-10-13 06:59:15,165 INFO L853 garLoopResultBuilder]: At program point L36-2(lines 36 38) the Hoare annotation is: (let ((.cse4 (bvmul ULTIMATE.start_main_~i~0 (_ bv2 32)))) (let ((.cse1 (bvsge ULTIMATE.start_main_~j~0 .cse4)) (.cse2 (bvsge ULTIMATE.start_main_~k~0 .cse4)) (.cse3 (bvslt ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~n~0)) (.cse0 (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)))) (or (and .cse0 (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (bvslt ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (or (not (bvslt (bvadd ULTIMATE.start_main_~j~0 (_ bv1 32)) ULTIMATE.start_main_~n~0)) (bvslt (bvadd ULTIMATE.start_main_~k~0 (_ bv1 32)) ULTIMATE.start_main_~n~0)) .cse1 .cse2 .cse3) (and .cse0 (bvsle ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) .cse1 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) .cse2 .cse3) (and .cse0 (= ULTIMATE.start_main_~i~0 (_ bv0 32)) (= ULTIMATE.start_main_~j~0 (_ bv0 32)) (bvslt (_ bv0 32) ULTIMATE.start_main_~n~0) (= ULTIMATE.start_main_~k~0 (bvmul (_ bv2 32) ULTIMATE.start_main_~i~0)))))) [2021-10-13 06:59:15,165 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 06:59:15,166 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 06:59:15,166 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 06:59:15,166 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-10-13 06:59:15,166 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-13 06:59:15,166 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 06:59:15,166 INFO L857 garLoopResultBuilder]: For program point L33-2(lines 33 45) no Hoare annotation was computed. [2021-10-13 06:59:15,166 INFO L853 garLoopResultBuilder]: At program point L33-3(lines 33 45) the Hoare annotation is: (let ((.cse0 (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)))) (or (and .cse0 (= ULTIMATE.start_main_~i~0 (_ bv0 32)) (= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0)) (and .cse0 (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (bvsge ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsle ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (not (bvslt ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~n~0))))) [2021-10-13 06:59:15,167 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 32) no Hoare annotation was computed. [2021-10-13 06:59:15,167 INFO L857 garLoopResultBuilder]: For program point L29-1(lines 29 32) no Hoare annotation was computed. [2021-10-13 06:59:15,167 INFO L860 garLoopResultBuilder]: At program point L46(lines 24 48) the Hoare annotation is: true [2021-10-13 06:59:15,167 INFO L853 garLoopResultBuilder]: At program point L34-2(lines 34 44) the Hoare annotation is: (let ((.cse0 (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)))) (or (and .cse0 (= ULTIMATE.start_main_~i~0 (_ bv0 32)) (= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (= ULTIMATE.start_main_~j~0 (_ bv0 32)) (bvslt (_ bv0 32) ULTIMATE.start_main_~n~0)) (let ((.cse1 (bvmul ULTIMATE.start_main_~i~0 (_ bv2 32)))) (and .cse0 (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (bvsge (bvadd ULTIMATE.start_main_~j~0 (_ bv1 32)) .cse1) (bvsge ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsle ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsge ULTIMATE.start_main_~j~0 .cse1))))) [2021-10-13 06:59:15,167 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-13 06:59:15,167 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-13 06:59:15,168 INFO L853 garLoopResultBuilder]: At program point L18-2(lines 1 48) the Hoare annotation is: (let ((.cse0 (bvmul ULTIMATE.start_main_~i~0 (_ bv2 32)))) (and (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)) (bvslt ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsge ULTIMATE.start_main_~j~0 .cse0) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (bvsge ULTIMATE.start_main_~k~0 .cse0) (bvslt ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~n~0))) [2021-10-13 06:59:15,168 INFO L857 garLoopResultBuilder]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2021-10-13 06:59:15,168 INFO L860 garLoopResultBuilder]: At program point L47(lines 24 48) the Hoare annotation is: true [2021-10-13 06:59:15,168 INFO L853 garLoopResultBuilder]: At program point L18-5(lines 17 22) the Hoare annotation is: (and (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)) (= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsge ULTIMATE.start_main_~j~0 (bvmul ULTIMATE.start_main_~i~0 (_ bv2 32))) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (bvslt ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~n~0)) [2021-10-13 06:59:15,168 INFO L857 garLoopResultBuilder]: For program point L18-6(lines 18 20) no Hoare annotation was computed. [2021-10-13 06:59:15,168 INFO L853 garLoopResultBuilder]: At program point L18-8(lines 1 48) the Hoare annotation is: (and (bvslt ULTIMATE.start_main_~n~0 (_ bv1000000 32)) (not (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (bvsge ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsle ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) (bvsge ULTIMATE.start_main_~j~0 (bvmul ULTIMATE.start_main_~i~0 (_ bv2 32))) (bvslt ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~n~0)) [2021-10-13 06:59:15,169 INFO L857 garLoopResultBuilder]: For program point L35(lines 35 43) no Hoare annotation was computed. [2021-10-13 06:59:15,172 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 06:59:15,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:59:15 BoogieIcfgContainer [2021-10-13 06:59:15,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 06:59:15,199 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 06:59:15,199 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 06:59:15,199 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 06:59:15,199 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:11" (3/4) ... [2021-10-13 06:59:15,202 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 06:59:15,212 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-13 06:59:15,213 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 06:59:15,213 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 06:59:15,213 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 06:59:15,250 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 06:59:15,250 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 06:59:15,251 INFO L168 Benchmark]: Toolchain (without parser) took 64336.82 ms. Allocated memory was 62.9 MB in the beginning and 178.3 MB in the end (delta: 115.3 MB). Free memory was 43.1 MB in the beginning and 65.1 MB in the end (delta: -22.0 MB). Peak memory consumption was 94.7 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:15,252 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 62.9 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:59:15,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.60 ms. Allocated memory is still 62.9 MB. Free memory was 42.8 MB in the beginning and 47.4 MB in the end (delta: -4.6 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:15,253 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.71 ms. Allocated memory is still 62.9 MB. Free memory was 47.4 MB in the beginning and 45.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:59:15,253 INFO L168 Benchmark]: Boogie Preprocessor took 32.31 ms. Allocated memory is still 62.9 MB. Free memory was 45.8 MB in the beginning and 44.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:59:15,254 INFO L168 Benchmark]: RCFGBuilder took 308.60 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 34.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:15,254 INFO L168 Benchmark]: TraceAbstraction took 63623.39 ms. Allocated memory was 62.9 MB in the beginning and 178.3 MB in the end (delta: 115.3 MB). Free memory was 34.0 MB in the beginning and 67.2 MB in the end (delta: -33.2 MB). Peak memory consumption was 109.6 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:15,255 INFO L168 Benchmark]: Witness Printer took 51.65 ms. Allocated memory is still 178.3 MB. Free memory was 67.2 MB in the beginning and 65.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:15,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 62.9 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 261.60 ms. Allocated memory is still 62.9 MB. Free memory was 42.8 MB in the beginning and 47.4 MB in the end (delta: -4.6 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.71 ms. Allocated memory is still 62.9 MB. Free memory was 47.4 MB in the beginning and 45.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.31 ms. Allocated memory is still 62.9 MB. Free memory was 45.8 MB in the beginning and 44.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 308.60 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 34.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 63623.39 ms. Allocated memory was 62.9 MB in the beginning and 178.3 MB in the end (delta: 115.3 MB). Free memory was 34.0 MB in the beginning and 67.2 MB in the end (delta: -33.2 MB). Peak memory consumption was 109.6 MB. Max. memory is 16.1 GB. * Witness Printer took 51.65 ms. Allocated memory is still 178.3 MB. Free memory was 67.2 MB in the beginning and 65.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 63542.0ms, OverallIterations: 8, TraceHistogramMax: 3, EmptinessCheckTime: 17.1ms, AutomataDifference: 32910.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 15705.6ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 165 SDtfs, 2091 SDslu, 1065 SDs, 0 SdLazy, 3988 SolverSat, 1373 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6146.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1210 GetRequests, 629 SyntacticMatches, 1 SemanticMatches, 580 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23727 ImplicationChecksByTransitivity, 27442.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=6, InterpolantAutomatonStates: 523, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 168.8ms AutomataMinimizationTime, 8 MinimizatonAttempts, 898 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 227 NumberOfFragments, 215 HoareAnnotationTreeSize, 8 FomulaSimplifications, 61914418 FormulaSimplificationTreeSizeReduction, 2971.7ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 591279 FormulaSimplificationTreeSizeReductionInter, 12722.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 117.2ms SsaConstructionTime, 404.2ms SatisfiabilityAnalysisTime, 7273.7ms InterpolantComputationTime, 386 NumberOfCodeBlocks, 386 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 734 ConstructedInterpolants, 1 QuantifiedInterpolants, 3974 SizeOfPredicates, 88 NumberOfNonLiveVariables, 870 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 38 InterpolantComputations, 6 PerfectInterpolantSequences, 98/290 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 - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((~bvslt32(n, 1000000bv32) && k == n) && ~bvsge32(j, ~bvmul32(i, 2bv32))) && cond == 1bv32) && ~bvslt32(j, n) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((((~bvslt32(n, 1000000bv32) && ~bvslt32(k, n)) && ~bvsge32(j, ~bvmul32(i, 2bv32))) && cond == 1bv32) && ~bvsge32(k, ~bvmul32(i, 2bv32))) && ~bvslt32(j, n) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((~bvslt32(n, 1000000bv32) && i == 0bv32) && k == n) || ((((~bvslt32(n, 1000000bv32) && !(cond == 0bv32)) && ~bvsge32(k, n)) && ~bvsle32(k, n)) && !~bvslt32(j, n)) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((((~bvslt32(n, 1000000bv32) && !(cond == 0bv32)) && ~bvsge32(k, n)) && ~bvsle32(k, n)) && ~bvsge32(j, ~bvmul32(i, 2bv32))) && ~bvslt32(j, n) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((~bvslt32(n, 1000000bv32) && i == 0bv32) && k == n) && j == 0bv32) && ~bvslt32(0bv32, n)) || (((((~bvslt32(n, 1000000bv32) && !(cond == 0bv32)) && ~bvsge32(~bvadd64(j, 1bv32), ~bvmul32(i, 2bv32))) && ~bvsge32(k, n)) && ~bvsle32(k, n)) && ~bvsge32(j, ~bvmul32(i, 2bv32))) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((((~bvslt32(n, 1000000bv32) && !(cond == 0bv32)) && ~bvslt32(k, n)) && (!~bvslt32(~bvadd64(j, 1bv32), n) || ~bvslt32(~bvadd64(k, 1bv32), n))) && ~bvsge32(j, ~bvmul32(i, 2bv32))) && ~bvsge32(k, ~bvmul32(i, 2bv32))) && ~bvslt32(j, n)) || (((((~bvslt32(n, 1000000bv32) && ~bvsle32(k, n)) && ~bvsge32(j, ~bvmul32(i, 2bv32))) && cond == 1bv32) && ~bvsge32(k, ~bvmul32(i, 2bv32))) && ~bvslt32(j, n))) || ((((~bvslt32(n, 1000000bv32) && i == 0bv32) && j == 0bv32) && ~bvslt32(0bv32, n)) && k == ~bvmul32(2bv32, i)) RESULT: Ultimate proved your program to be correct! [2021-10-13 06:59:15,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb47281-9551-4d40-9611-5a930423e3a6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...