./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF --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 ee8fbf7ad7c769bb660b4c416c89e8a6070f0c88820552e25f4a5ca5398fd5ca --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:41:08,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:41:08,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:41:08,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:41:08,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:41:08,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:41:08,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:41:08,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:41:08,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:41:08,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:41:08,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:41:08,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:41:08,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:41:08,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:41:08,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:41:08,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:41:08,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:41:08,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:41:08,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:41:08,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:41:08,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:41:08,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:41:08,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:41:08,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:41:08,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:41:08,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:41:08,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:41:08,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:41:08,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:41:08,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:41:08,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:41:08,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:41:08,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:41:08,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:41:09,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:41:09,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:41:09,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:41:09,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:41:09,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:41:09,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:41:09,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:41:09,004 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:41:09,054 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:41:09,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:41:09,056 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:41:09,056 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:41:09,056 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:41:09,057 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:41:09,057 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:41:09,057 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:41:09,057 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:41:09,058 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:41:09,064 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:41:09,065 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:41:09,065 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:41:09,065 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:41:09,065 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:41:09,066 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:41:09,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:41:09,067 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:41:09,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:41:09,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:41:09,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:41:09,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:41:09,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:41:09,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:41:09,068 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:41:09,068 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:41:09,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:41:09,069 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:41:09,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:41:09,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:41:09,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:41:09,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:41:09,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:41:09,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:41:09,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:41:09,073 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:41:09,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:41:09,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:41:09,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:41:09,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:41:09,074 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_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee8fbf7ad7c769bb660b4c416c89e8a6070f0c88820552e25f4a5ca5398fd5ca [2021-11-12 23:41:09,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:41:09,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:41:09,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:41:09,451 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:41:09,451 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:41:09,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2021-11-12 23:41:09,527 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/data/53b7599c8/eb2237fc71fd4a9691ca05594c8b8de7/FLAGb199838db [2021-11-12 23:41:09,965 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:41:09,969 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2021-11-12 23:41:09,981 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/data/53b7599c8/eb2237fc71fd4a9691ca05594c8b8de7/FLAGb199838db [2021-11-12 23:41:10,343 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/data/53b7599c8/eb2237fc71fd4a9691ca05594c8b8de7 [2021-11-12 23:41:10,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:41:10,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:41:10,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:41:10,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:41:10,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:41:10,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3746f4e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10, skipping insertion in model container [2021-11-12 23:41:10,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:41:10,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:41:10,589 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_d9920525-5052-4591-9f43-72a8338259ea/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c[525,538] [2021-11-12 23:41:10,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:41:10,642 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:41:10,653 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_d9920525-5052-4591-9f43-72a8338259ea/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c[525,538] [2021-11-12 23:41:10,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:41:10,688 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:41:10,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10 WrapperNode [2021-11-12 23:41:10,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:41:10,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:41:10,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:41:10,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:41:10,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:41:10,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:41:10,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:41:10,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:41:10,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:41:10,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:41:10,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:41:10,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:41:10,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10" (1/1) ... [2021-11-12 23:41:10,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:41:10,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:10,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:41:10,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:41:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:41:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:41:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:41:10,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:41:10,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:41:10,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:41:11,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:41:11,217 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:41:11,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:41:11 BoogieIcfgContainer [2021-11-12 23:41:11,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:41:11,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:41:11,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:41:11,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:41:11,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:41:10" (1/3) ... [2021-11-12 23:41:11,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b98b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:41:11, skipping insertion in model container [2021-11-12 23:41:11,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:41:10" (2/3) ... [2021-11-12 23:41:11,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b98b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:41:11, skipping insertion in model container [2021-11-12 23:41:11,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:41:11" (3/3) ... [2021-11-12 23:41:11,231 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound2.c [2021-11-12 23:41:11,240 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:41:11,241 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:41:11,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:41:11,310 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, mAutomataTypeConcurrency=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 [2021-11-12 23:41:11,311 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:41:11,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 23:41:11,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:41:11,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:11,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:11,346 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:11,352 INFO L85 PathProgramCache]: Analyzing trace with hash -678335095, now seen corresponding path program 1 times [2021-11-12 23:41:11,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:11,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792360974] [2021-11-12 23:41:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:11,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:11,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:41:11,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792360974] [2021-11-12 23:41:11,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792360974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:11,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:11,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:41:11,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657186892] [2021-11-12 23:41:11,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:11,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:41:11,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:11,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:41:11,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:41:11,628 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:11,684 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2021-11-12 23:41:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:41:11,687 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 23:41:11,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:11,694 INFO L225 Difference]: With dead ends: 44 [2021-11-12 23:41:11,694 INFO L226 Difference]: Without dead ends: 22 [2021-11-12 23:41:11,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:41:11,702 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:11,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 3 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 25.82ms Time] [2021-11-12 23:41:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-12 23:41:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-12 23:41:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:41:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2021-11-12 23:41:11,745 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2021-11-12 23:41:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:11,746 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-11-12 23:41:11,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2021-11-12 23:41:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:41:11,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:11,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:11,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:41:11,749 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:11,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:11,751 INFO L85 PathProgramCache]: Analyzing trace with hash 520368722, now seen corresponding path program 1 times [2021-11-12 23:41:11,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:11,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894136369] [2021-11-12 23:41:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:11,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:11,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:41:11,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894136369] [2021-11-12 23:41:11,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894136369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:11,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:11,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:41:11,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542005967] [2021-11-12 23:41:11,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:11,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:41:11,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:11,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:41:11,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:41:11,892 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:11,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:11,938 INFO L93 Difference]: Finished difference Result 42 states and 63 transitions. [2021-11-12 23:41:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:41:11,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-12 23:41:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:11,942 INFO L225 Difference]: With dead ends: 42 [2021-11-12 23:41:11,942 INFO L226 Difference]: Without dead ends: 24 [2021-11-12 23:41:11,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:41:11,949 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.95ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:11,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 13 Unknown, 0 Unchecked, 1.95ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 34.37ms Time] [2021-11-12 23:41:11,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-12 23:41:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-12 23:41:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:41:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2021-11-12 23:41:11,968 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 9 [2021-11-12 23:41:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:11,969 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2021-11-12 23:41:11,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2021-11-12 23:41:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 23:41:11,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:11,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:11,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:41:11,976 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:11,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:11,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1389535714, now seen corresponding path program 1 times [2021-11-12 23:41:11,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:11,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431071754] [2021-11-12 23:41:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:11,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:12,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:41:12,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599143899] [2021-11-12 23:41:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:12,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:12,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:12,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:12,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:41:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:12,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:41:12,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:12,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:12,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:41:12,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431071754] [2021-11-12 23:41:12,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:41:12,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599143899] [2021-11-12 23:41:12,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599143899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:12,244 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:12,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:41:12,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572608762] [2021-11-12 23:41:12,245 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:12,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:41:12,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:12,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:41:12,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:41:12,247 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:14,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:16,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:16,388 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-11-12 23:41:16,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:41:16,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-12 23:41:16,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:16,481 INFO L225 Difference]: With dead ends: 37 [2021-11-12 23:41:16,481 INFO L226 Difference]: Without dead ends: 28 [2021-11-12 23:41:16,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:41:16,482 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4025.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4128.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:16,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 86 Invalid, 17 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 2 Unknown, 0 Unchecked, 4128.13ms Time] [2021-11-12 23:41:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-12 23:41:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-12 23:41:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:41:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2021-11-12 23:41:16,489 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 10 [2021-11-12 23:41:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:16,489 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2021-11-12 23:41:16,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2021-11-12 23:41:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 23:41:16,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:16,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:16,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-12 23:41:16,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:16,717 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1388046164, now seen corresponding path program 1 times [2021-11-12 23:41:16,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:16,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273079491] [2021-11-12 23:41:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:16,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:16,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:41:16,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273079491] [2021-11-12 23:41:16,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273079491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:16,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:16,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:41:16,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910066759] [2021-11-12 23:41:16,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:16,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:16,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:16,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:16,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:41:16,953 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:19,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 23:41:21,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:23,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:23,921 INFO L93 Difference]: Finished difference Result 59 states and 89 transitions. [2021-11-12 23:41:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:41:23,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-12 23:41:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:23,922 INFO L225 Difference]: With dead ends: 59 [2021-11-12 23:41:23,922 INFO L226 Difference]: Without dead ends: 39 [2021-11-12 23:41:23,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:41:23,924 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6543.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6916.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:23,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 86 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [24 Valid, 59 Invalid, 3 Unknown, 0 Unchecked, 6916.75ms Time] [2021-11-12 23:41:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-12 23:41:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-12 23:41:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-12 23:41:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2021-11-12 23:41:23,937 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 10 [2021-11-12 23:41:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:23,938 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2021-11-12 23:41:23,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2021-11-12 23:41:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 23:41:23,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:23,939 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:23,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:41:23,939 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:23,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1970023331, now seen corresponding path program 1 times [2021-11-12 23:41:23,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:23,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37614903] [2021-11-12 23:41:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:23,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:23,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:41:23,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545974108] [2021-11-12 23:41:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:23,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:23,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:23,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:23,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:41:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:23,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:41:23,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:24,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:24,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:41:24,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37614903] [2021-11-12 23:41:24,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:41:24,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545974108] [2021-11-12 23:41:24,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545974108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:24,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609295160] [2021-11-12 23:41:24,144 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-12 23:41:24,144 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:41:24,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:41:24,153 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:41:24,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:41:24,183 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,189 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:24,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:41:24,192 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:24,192 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,193 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:41:24,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-12 23:41:24,221 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 21=[|v_#valid_18|]} [2021-11-12 23:41:24,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-12 23:41:24,235 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:41:24,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:41:24,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:41:24,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:41:24,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:41:24,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:41:24,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:41:24,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:24,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:41:24,364 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:41:24,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:41:24,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:41:24,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,429 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,435 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-12 23:41:24,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:41:24,436 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:294, output treesize:121 [2021-11-12 23:41:24,447 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,459 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:41:24,474 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-12 23:41:24,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-11-12 23:41:24,504 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,513 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-12 23:41:24,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-11-12 23:41:24,690 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,736 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-11-12 23:41:24,753 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-11-12 23:41:24,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:24,916 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-12 23:41:24,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-12 23:41:24,920 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:41:24,925 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:41:24,939 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-12 23:41:24,943 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-12 23:41:24,946 INFO L180 QuantifierPusher]: treesize reduction 4, result has 92.9 percent of original size [2021-11-12 23:41:24,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-12 23:41:24,952 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,955 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-12 23:41:24,959 INFO L180 QuantifierPusher]: treesize reduction 4, result has 92.9 percent of original size [2021-11-12 23:41:24,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-12 23:41:24,967 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:41:24,975 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:24,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:41:24,977 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2021-11-12 23:41:24,985 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:41:25,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1609295160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:25,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:41:25,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 12 [2021-11-12 23:41:25,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545976835] [2021-11-12 23:41:25,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:25,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:41:25,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:25,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:41:25,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:41:25,577 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:26,273 INFO L93 Difference]: Finished difference Result 78 states and 117 transitions. [2021-11-12 23:41:26,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:41:26,276 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-12 23:41:26,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:26,277 INFO L225 Difference]: With dead ends: 78 [2021-11-12 23:41:26,277 INFO L226 Difference]: Without dead ends: 59 [2021-11-12 23:41:26,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:41:26,279 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 611.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.56ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 667.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:26,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 130 Invalid, 199 Unknown, 0 Unchecked, 4.56ms Time], IncrementalHoareTripleChecker [12 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 667.78ms Time] [2021-11-12 23:41:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-12 23:41:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2021-11-12 23:41:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-12 23:41:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-11-12 23:41:26,293 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 12 [2021-11-12 23:41:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:26,294 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-11-12 23:41:26,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-11-12 23:41:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:41:26,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:26,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:26,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-12 23:41:26,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:26,513 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash 600084205, now seen corresponding path program 1 times [2021-11-12 23:41:26,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:26,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149126029] [2021-11-12 23:41:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:26,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:26,525 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:41:26,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371011235] [2021-11-12 23:41:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:26,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:26,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:26,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:26,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:41:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:26,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:41:26,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:41:26,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:41:29,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:41:29,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149126029] [2021-11-12 23:41:29,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:41:29,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371011235] [2021-11-12 23:41:29,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371011235] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:29,436 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:29,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:41:29,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194079665] [2021-11-12 23:41:29,437 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:29,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:29,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:29,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:29,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:41:29,438 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:33,571 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 23:41:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:33,971 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2021-11-12 23:41:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:41:33,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-12 23:41:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:33,975 INFO L225 Difference]: With dead ends: 57 [2021-11-12 23:41:33,975 INFO L226 Difference]: Without dead ends: 55 [2021-11-12 23:41:33,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=14, Invalid=27, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:41:33,976 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2497.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 2511.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:33,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 110 Invalid, 30 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 6 Unchecked, 2511.81ms Time] [2021-11-12 23:41:33,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-12 23:41:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-11-12 23:41:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 34 states have internal predecessors, (37), 19 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:41:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2021-11-12 23:41:33,998 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 13 [2021-11-12 23:41:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:33,998 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2021-11-12 23:41:33,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:33,999 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2021-11-12 23:41:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:41:34,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:34,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:34,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:34,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-12 23:41:34,219 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:34,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:34,219 INFO L85 PathProgramCache]: Analyzing trace with hash 601573755, now seen corresponding path program 1 times [2021-11-12 23:41:34,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:34,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763429150] [2021-11-12 23:41:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:34,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:34,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:41:34,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763429150] [2021-11-12 23:41:34,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763429150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:34,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953296441] [2021-11-12 23:41:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:34,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:34,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:34,317 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:34,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:41:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:34,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:41:34,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:34,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:34,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953296441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:34,465 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:34,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 7 [2021-11-12 23:41:34,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292318026] [2021-11-12 23:41:34,465 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:34,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:34,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:41:34,467 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:34,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:34,558 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2021-11-12 23:41:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:41:34,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-12 23:41:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:34,562 INFO L225 Difference]: With dead ends: 63 [2021-11-12 23:41:34,562 INFO L226 Difference]: Without dead ends: 45 [2021-11-12 23:41:34,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:41:34,563 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:34,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 64 Invalid, 38 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [22 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 61.28ms Time] [2021-11-12 23:41:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-12 23:41:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-11-12 23:41:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 23:41:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-11-12 23:41:34,574 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 13 [2021-11-12 23:41:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:34,574 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-11-12 23:41:34,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-11-12 23:41:34,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-12 23:41:34,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:34,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:34,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:34,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:34,797 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1700427874, now seen corresponding path program 1 times [2021-11-12 23:41:34,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:34,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272704646] [2021-11-12 23:41:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:34,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:34,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:41:34,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146698964] [2021-11-12 23:41:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:34,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:34,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:34,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:34,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:41:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:34,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:41:34,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:41:34,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:41:34,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:41:34,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272704646] [2021-11-12 23:41:34,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:41:34,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146698964] [2021-11-12 23:41:34,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146698964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:34,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688683767] [2021-11-12 23:41:34,986 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-12 23:41:34,986 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:41:34,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:41:34,987 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:41:34,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:41:35,007 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,008 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:35,008 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,009 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 23:41:35,010 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:41:35,011 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:41:35,015 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-12 23:41:35,025 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 21=[|v_#valid_19|]} [2021-11-12 23:41:35,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 23:41:35,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:41:35,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:41:35,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:41:35,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-12 23:41:35,086 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:41:35,087 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,090 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:41:35,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:41:35,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:35,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-12 23:41:35,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:41:35,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,153 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-12 23:41:35,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:41:35,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-12 23:41:35,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:41:35,165 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:294, output treesize:121 [2021-11-12 23:41:35,170 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:41:35,176 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-12 23:41:35,179 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-12 23:41:35,181 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,186 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-12 23:41:35,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,268 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,298 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 326 [2021-11-12 23:41:35,307 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,315 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-11-12 23:41:35,322 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,335 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 355 [2021-11-12 23:41:35,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,437 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-12 23:41:35,439 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-12 23:41:35,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:41:35,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-12 23:41:35,455 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-12 23:41:35,457 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-12 23:41:35,461 INFO L180 QuantifierPusher]: treesize reduction 4, result has 92.9 percent of original size [2021-11-12 23:41:35,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-12 23:41:35,465 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-12 23:41:35,470 INFO L180 QuantifierPusher]: treesize reduction 4, result has 92.9 percent of original size [2021-11-12 23:41:35,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-12 23:41:35,478 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:41:35,493 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,501 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-12 23:41:35,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,509 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:41:35,514 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-11-12 23:41:35,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,577 INFO L180 QuantifierPusher]: treesize reduction 48, result has 71.6 percent of original size [2021-11-12 23:41:35,607 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-12 23:41:35,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-12 23:41:35,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:41:35,635 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:41:35,638 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 23:41:35,638 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2021-11-12 23:41:35,648 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:41:36,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:41:36,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:41:36,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-11-12 23:41:36,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675983644] [2021-11-12 23:41:36,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-12 23:41:36,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:41:36,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:36,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:41:36,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:41:36,695 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:41:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:36,781 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-11-12 23:41:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:41:36,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-12 23:41:36,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:36,783 INFO L225 Difference]: With dead ends: 60 [2021-11-12 23:41:36,783 INFO L226 Difference]: Without dead ends: 46 [2021-11-12 23:41:36,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:41:36,784 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:36,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 16 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 42.86ms Time] [2021-11-12 23:41:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-12 23:41:36,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-12 23:41:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 23:41:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-11-12 23:41:36,800 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 17 [2021-11-12 23:41:36,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:36,800 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-11-12 23:41:36,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:41:36,805 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-11-12 23:41:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-12 23:41:36,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:36,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:36,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-12 23:41:37,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:37,029 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:37,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1856396652, now seen corresponding path program 1 times [2021-11-12 23:41:37,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:37,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059516123] [2021-11-12 23:41:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:37,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:37,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:41:37,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001023044] [2021-11-12 23:41:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:37,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:37,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:37,040 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:37,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:41:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:37,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:41:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:41:37,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:41:37,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:41:37,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059516123] [2021-11-12 23:41:37,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:41:37,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001023044] [2021-11-12 23:41:37,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001023044] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:37,281 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:37,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-12 23:41:37,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888906153] [2021-11-12 23:41:37,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:37,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:37,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:37,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:37,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:41:37,282 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:41:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:37,403 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-11-12 23:41:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:41:37,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-12 23:41:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:37,404 INFO L225 Difference]: With dead ends: 56 [2021-11-12 23:41:37,404 INFO L226 Difference]: Without dead ends: 28 [2021-11-12 23:41:37,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:41:37,405 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.38ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:37,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 75 Invalid, 47 Unknown, 0 Unchecked, 1.38ms Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 100.86ms Time] [2021-11-12 23:41:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-12 23:41:37,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-12 23:41:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 23:41:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-12 23:41:37,412 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2021-11-12 23:41:37,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:37,412 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-12 23:41:37,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:41:37,412 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-12 23:41:37,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 23:41:37,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:37,413 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:37,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:37,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:37,629 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:37,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:37,629 INFO L85 PathProgramCache]: Analyzing trace with hash -339513844, now seen corresponding path program 1 times [2021-11-12 23:41:37,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:41:37,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993950204] [2021-11-12 23:41:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:37,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:41:37,642 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:41:37,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865585520] [2021-11-12 23:41:37,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:37,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:37,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:37,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:37,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:41:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:37,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:41:37,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:37,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:41:43,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:41:43,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993950204] [2021-11-12 23:41:43,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:41:43,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865585520] [2021-11-12 23:41:43,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865585520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:43,284 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:43,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-12 23:41:43,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979633323] [2021-11-12 23:41:43,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:43,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:43,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:41:43,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:43,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=18, Unknown=2, NotChecked=0, Total=30 [2021-11-12 23:41:43,287 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:41:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:44,164 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-11-12 23:41:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:41:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2021-11-12 23:41:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:44,165 INFO L225 Difference]: With dead ends: 32 [2021-11-12 23:41:44,165 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 23:41:44,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=14, Invalid=26, Unknown=2, NotChecked=0, Total=42 [2021-11-12 23:41:44,166 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 153.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:44,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 67 Invalid, 30 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 2 Unchecked, 153.66ms Time] [2021-11-12 23:41:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 23:41:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 23:41:44,168 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) [2021-11-12 23:41:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 23:41:44,168 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-11-12 23:41:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:44,168 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 23:41:44,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:41:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 23:41:44,168 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 23:41:44,171 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:41:44,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:44,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-12 23:41:44,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 23:41:45,283 INFO L858 garLoopResultBuilder]: For program point L31(lines 31 32) no Hoare annotation was computed. [2021-11-12 23:41:45,283 INFO L858 garLoopResultBuilder]: For program point L52-2(lines 20 61) no Hoare annotation was computed. [2021-11-12 23:41:45,283 INFO L858 garLoopResultBuilder]: For program point L44(lines 38 56) no Hoare annotation was computed. [2021-11-12 23:41:45,284 INFO L854 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (and (<= 0 |#t~string4.base|) (<= 2 ~counter~0) (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 1 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |#t~string5.base|) (<= 1 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~h~0#1| 0) (<= 0 |#t~string5.offset|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |#t~string6.base|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |#t~string5.offset| 0) (= 0 |#t~string4.offset|) (= |#NULL.base| 0)) [2021-11-12 23:41:45,284 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-12 23:41:45,284 INFO L854 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~p~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|))) (or (and (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) .cse0 (= |ULTIMATE.start_main_~q~0#1| 1) .cse1) (and (<= 2 ~counter~0) .cse0 .cse1))) [2021-11-12 23:41:45,284 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 |#t~string4.base|) (<= 2 ~counter~0) (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 1 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |#t~string5.base|) (<= 1 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~h~0#1| 0) (<= 0 |#t~string5.offset|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |#t~string6.base|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |#t~string5.offset| 0) (= 0 |#t~string4.offset|) (= |#NULL.base| 0)) [2021-11-12 23:41:45,284 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-12 23:41:45,285 INFO L854 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~p~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|))) (or (and (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) .cse0 (= |ULTIMATE.start_main_~q~0#1| 1) .cse1) (and (<= 0 |#t~string4.base|) .cse0 (<= 1 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |#t~string5.base|) (= |#t~string5.offset| 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_~h~0#1| 0) (<= 0 |#t~string6.base|) (= |#NULL.offset| 0) (<= 4 ~counter~0) (= |#t~string6.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= 0 |#t~string4.offset|) (= |#NULL.base| 0)) (and (<= 2 ~counter~0) .cse0 .cse1))) [2021-11-12 23:41:45,285 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (<= 0 |#t~string4.base|) (<= 2 ~counter~0) (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 1 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |#t~string5.base|) (<= 1 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~h~0#1| 0) (<= 0 |#t~string5.offset|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |#t~string6.base|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |#t~string5.offset| 0) (= 0 |#t~string4.offset|) (= |#NULL.base| 0)) [2021-11-12 23:41:45,285 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 56) no Hoare annotation was computed. [2021-11-12 23:41:45,285 INFO L854 garLoopResultBuilder]: At program point L38-2(lines 38 56) the Hoare annotation is: (and (<= 2 ~counter~0) (= |ULTIMATE.start_main_~p~0#1| 0) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|)) [2021-11-12 23:41:45,285 INFO L858 garLoopResultBuilder]: For program point L30-1(lines 30 35) no Hoare annotation was computed. [2021-11-12 23:41:45,285 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 35) the Hoare annotation is: (let ((.cse0 (<= 0 |#t~string4.base|)) (.cse1 (= |ULTIMATE.start_main_~p~0#1| 0)) (.cse2 (<= 1 |ULTIMATE.start_assume_abort_if_not_~cond#1|)) (.cse3 (<= 0 |#t~string5.base|)) (.cse4 (= |ULTIMATE.start_main_~h~0#1| 0)) (.cse5 (<= 0 |#t~string6.base|)) (.cse6 (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse7 (= |#NULL.offset| 0)) (.cse8 (= |#t~string6.offset| 0)) (.cse9 (<= 0 |#StackHeapBarrier|)) (.cse10 (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse11 (= 0 |#t~string4.offset|)) (.cse12 (= |#NULL.base| 0))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 1 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) .cse4 (<= 0 |#t~string5.offset|) (= |ULTIMATE.start_main_~q~0#1| 1) (= ~counter~0 0) .cse5 .cse6 .cse7 .cse8 (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) .cse9 .cse10 (<= |#t~string5.offset| 0) .cse11 .cse12) (and .cse0 .cse1 .cse2 .cse3 (= |#t~string5.offset| 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) .cse4 (<= 1 ~counter~0) .cse5 .cse6 .cse7 .cse8 (< ~counter~0 3) .cse9 .cse10 .cse11 .cse12))) [2021-11-12 23:41:45,285 INFO L861 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2021-11-12 23:41:45,286 INFO L854 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (and (<= 0 |#t~string4.base|) (<= 2 ~counter~0) (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 1 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |#t~string5.base|) (<= 1 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~h~0#1| 0) (<= 0 |#t~string5.offset|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |#t~string6.base|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |#t~string5.offset| 0) (= 0 |#t~string4.offset|) (= |#NULL.base| 0)) [2021-11-12 23:41:45,286 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= 0 |#t~string4.base|) (<= 2 ~counter~0) (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 1 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |#t~string5.base|) (<= 1 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~h~0#1| 0) (<= 0 |#t~string5.offset|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |#t~string6.base|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |#t~string5.offset| 0) (= 0 |#t~string4.offset|) (= |#NULL.base| 0)) [2021-11-12 23:41:45,286 INFO L854 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (and (<= 0 |#t~string4.base|) (<= 2 ~counter~0) (<= (+ (* 4294967296 (div (+ (* |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~q~0#1|) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1| 1) (+ |ULTIMATE.start_main_~q~0#1| (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)))) (= |ULTIMATE.start_main_~p~0#1| 0) (<= 1 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |#t~string5.base|) (<= 1 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~h~0#1| 0) (<= 0 |#t~string5.offset|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 |#t~string6.base|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~r~0#1|) (= |#NULL.offset| 0) (= |#t~string6.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |#t~string5.offset| 0) (= 0 |#t~string4.offset|) (= |#NULL.base| 0)) [2021-11-12 23:41:45,286 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-11-12 23:41:45,286 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-11-12 23:41:45,286 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-11-12 23:41:45,287 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-11-12 23:41:45,287 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-11-12 23:41:45,287 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-11-12 23:41:45,291 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:45,293 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:41:45,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:41:45 BoogieIcfgContainer [2021-11-12 23:41:45,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:41:45,329 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:41:45,329 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:41:45,329 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:41:45,330 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:41:11" (3/4) ... [2021-11-12 23:41:45,332 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-12 23:41:45,336 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-12 23:41:45,340 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-12 23:41:45,340 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-12 23:41:45,340 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-12 23:41:45,340 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-12 23:41:45,361 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((0 <= "0" && p == 0) && 1 <= cond) && 0 <= "dijkstra-u.c") && 1 <= \old(cond)) && h == 0) && 0 <= "dijkstra-u.c") && q == 1) && counter == 0) && 0 <= "reach_error") && n == r) && #NULL == 0) && "reach_error" == 0) && \old(cond) <= 1) && 0 <= unknown-#StackHeapBarrier-unknown) && cond <= 1) && "dijkstra-u.c" <= 0) && 0 == "0") && #NULL == 0) || ((((((((((((((((0 <= "0" && p == 0) && 1 <= cond) && 0 <= "dijkstra-u.c") && "dijkstra-u.c" == 0) && \old(cond) == 1) && h == 0) && 1 <= counter) && 0 <= "reach_error") && n == r) && #NULL == 0) && "reach_error" == 0) && counter < 3) && 0 <= unknown-#StackHeapBarrier-unknown) && cond <= 1) && 0 == "0") && #NULL == 0) [2021-11-12 23:41:45,376 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 23:41:45,376 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:41:45,377 INFO L158 Benchmark]: Toolchain (without parser) took 35030.07ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 52.3MB in the beginning and 39.3MB in the end (delta: 13.0MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. [2021-11-12 23:41:45,377 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory is still 68.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:41:45,377 INFO L158 Benchmark]: CACSL2BoogieTranslator took 342.39ms. Allocated memory is still 92.3MB. Free memory was 52.1MB in the beginning and 67.5MB in the end (delta: -15.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-12 23:41:45,377 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.70ms. Allocated memory is still 92.3MB. Free memory was 67.3MB in the beginning and 65.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:41:45,378 INFO L158 Benchmark]: Boogie Preprocessor took 32.97ms. Allocated memory is still 92.3MB. Free memory was 65.5MB in the beginning and 64.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:41:45,378 INFO L158 Benchmark]: RCFGBuilder took 459.40ms. Allocated memory is still 92.3MB. Free memory was 64.5MB in the beginning and 51.1MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:41:45,378 INFO L158 Benchmark]: TraceAbstraction took 34105.77ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 50.9MB in the beginning and 42.4MB in the end (delta: 8.5MB). Peak memory consumption was 41.5MB. Max. memory is 16.1GB. [2021-11-12 23:41:45,379 INFO L158 Benchmark]: Witness Printer took 47.13ms. Allocated memory is still 111.1MB. Free memory was 42.4MB in the beginning and 39.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:41:45,380 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory is still 68.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 342.39ms. Allocated memory is still 92.3MB. Free memory was 52.1MB in the beginning and 67.5MB in the end (delta: -15.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.70ms. Allocated memory is still 92.3MB. Free memory was 67.3MB in the beginning and 65.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.97ms. Allocated memory is still 92.3MB. Free memory was 65.5MB in the beginning and 64.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 459.40ms. Allocated memory is still 92.3MB. Free memory was 64.5MB in the beginning and 51.1MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 34105.77ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 50.9MB in the beginning and 42.4MB in the end (delta: 8.5MB). Peak memory consumption was 41.5MB. Max. memory is 16.1GB. * Witness Printer took 47.13ms. Allocated memory is still 111.1MB. Free memory was 42.4MB in the beginning and 39.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: 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 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 34.0s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 17.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 106 SdHoareTripleChecker+Valid, 14643.33ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 85 mSDsluCounter, 917 SdHoareTripleChecker+Invalid, 14043.85ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 8 IncrementalHoareTripleChecker+Unchecked, 636 mSDsCounter, 74 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 391 IncrementalHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 74 mSolverCounterUnsat, 297 mSDtfsCounter, 391 mSolverCounterSat, 18.42ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 244 GetRequests, 179 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=6, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 76 PreInvPairs, 94 NumberOfFragments, 762 HoareAnnotationTreeSize, 76 FomulaSimplifications, 109 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 562 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 9.5s InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 227 ConstructedInterpolants, 17 QuantifiedInterpolants, 1615 SizeOfPredicates, 12 NumberOfNonLiveVariables, 536 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 18 InterpolantComputations, 13 PerfectInterpolantSequences, 43/53 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: OVERALL_TIME: 841.66ms, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 17, TOOLS_POST_TIME: 513.65ms, TOOLS_POST_CALL_APPLICATIONS: 1, TOOLS_POST_CALL_TIME: 10.37ms, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.00ms, TOOLS_QUANTIFIERELIM_APPLICATIONS: 18, TOOLS_QUANTIFIERELIM_TIME: 513.74ms, TOOLS_QUANTIFIERELIM_MAX_TIME: 257.24ms, FLUID_QUERY_TIME: 2.73ms, FLUID_QUERIES: 36, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.00ms, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.00ms, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 247.51ms, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 15.37ms, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME: 11.40ms, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 494.33ms, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 494.24ms, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.00ms, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.00ms, PROCEDURE_GRAPH_BUILDER_TIME: 2.90ms, PATH_EXPR_TIME: 2.93ms, REGEX_TO_DAG_TIME: 2.69ms, DAG_COMPRESSION_TIME: 8.82ms, DAG_COMPRESSION_PROCESSED_NODES: 63, DAG_COMPRESSION_RETAINED_NODES: 35, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((((((((((((((((((0 <= "0" && p == 0) && 1 <= cond) && 0 <= "dijkstra-u.c") && 1 <= \old(cond)) && h == 0) && 0 <= "dijkstra-u.c") && q == 1) && counter == 0) && 0 <= "reach_error") && n == r) && #NULL == 0) && "reach_error" == 0) && \old(cond) <= 1) && 0 <= unknown-#StackHeapBarrier-unknown) && cond <= 1) && "dijkstra-u.c" <= 0) && 0 == "0") && #NULL == 0) || ((((((((((((((((0 <= "0" && p == 0) && 1 <= cond) && 0 <= "dijkstra-u.c") && "dijkstra-u.c" == 0) && \old(cond) == 1) && h == 0) && 1 <= counter) && 0 <= "reach_error") && n == r) && #NULL == 0) && "reach_error" == 0) && counter < 3) && 0 <= unknown-#StackHeapBarrier-unknown) && cond <= 1) && 0 == "0") && #NULL == 0) RESULT: Ultimate proved your program to be correct! [2021-11-12 23:41:45,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9920525-5052-4591-9f43-72a8338259ea/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE