./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V --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 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:54:10,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:54:10,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:54:10,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:54:10,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:54:10,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:54:10,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:54:10,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:54:10,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:54:10,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:54:10,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:54:10,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:54:10,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:54:10,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:54:10,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:54:10,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:54:10,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:54:10,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:54:10,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:54:10,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:54:10,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:54:10,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:54:10,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:54:10,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:54:10,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:54:10,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:54:10,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:54:10,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:54:10,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:54:10,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:54:10,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:54:10,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:54:10,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:54:11,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:54:11,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:54:11,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:54:11,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:54:11,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:54:11,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:54:11,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:54:11,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:54:11,007 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:54:11,051 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:54:11,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:54:11,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:54:11,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:54:11,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:54:11,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:54:11,053 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:54:11,054 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:54:11,054 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:54:11,054 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:54:11,055 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:54:11,056 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:54:11,056 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:54:11,056 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:54:11,056 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:54:11,057 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:54:11,057 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:54:11,057 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:54:11,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:54:11,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:54:11,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:54:11,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:54:11,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:54:11,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:54:11,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:54:11,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:54:11,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:54:11,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:54:11,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:54:11,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:54:11,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:54:11,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:54:11,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:54:11,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:54:11,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:54:11,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:54:11,062 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:54:11,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:54:11,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:54:11,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:54:11,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:54:11,063 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_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 [2021-11-23 03:54:11,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:54:11,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:54:11,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:54:11,374 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:54:11,375 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:54:11,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2021-11-23 03:54:11,444 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/data/1613d9234/cf2936f186094971a2f89e351ab4fd5d/FLAG58c0c33bc [2021-11-23 03:54:11,900 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:54:11,900 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2021-11-23 03:54:11,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/data/1613d9234/cf2936f186094971a2f89e351ab4fd5d/FLAG58c0c33bc [2021-11-23 03:54:12,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/data/1613d9234/cf2936f186094971a2f89e351ab4fd5d [2021-11-23 03:54:12,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:54:12,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:54:12,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:54:12,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:54:12,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:54:12,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3620e331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12, skipping insertion in model container [2021-11-23 03:54:12,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:54:12,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:54:12,490 WARN L230 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_b3311b81-e52e-4a77-af58-da49d5105a1f/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c[537,550] [2021-11-23 03:54:12,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:54:12,521 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:54:12,543 WARN L230 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_b3311b81-e52e-4a77-af58-da49d5105a1f/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c[537,550] [2021-11-23 03:54:12,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:54:12,578 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:54:12,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12 WrapperNode [2021-11-23 03:54:12,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:54:12,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:54:12,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:54:12,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:54:12,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,619 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2021-11-23 03:54:12,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:54:12,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:54:12,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:54:12,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:54:12,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:54:12,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:54:12,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:54:12,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:54:12,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12" (1/1) ... [2021-11-23 03:54:12,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:54:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:12,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:54:12,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:54:12,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:54:12,752 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:54:12,752 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:54:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:54:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:54:12,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:54:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:54:12,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:54:12,807 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:54:12,809 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:54:12,909 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:54:12,971 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:54:12,971 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:54:12,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:12 BoogieIcfgContainer [2021-11-23 03:54:12,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:54:12,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:54:12,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:54:12,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:54:12,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:54:12" (1/3) ... [2021-11-23 03:54:12,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b27dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:12, skipping insertion in model container [2021-11-23 03:54:12,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:12" (2/3) ... [2021-11-23 03:54:12,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b27dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:12, skipping insertion in model container [2021-11-23 03:54:12,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:12" (3/3) ... [2021-11-23 03:54:12,989 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound100.c [2021-11-23 03:54:12,994 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:54:13,006 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:54:13,084 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:54:13,092 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 [2021-11-23 03:54:13,093 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:54:13,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:54:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:54:13,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:13,117 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:13,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:13,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1772938727, now seen corresponding path program 1 times [2021-11-23 03:54:13,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:13,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096939603] [2021-11-23 03:54:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:13,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:13,223 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:54:13,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569335188] [2021-11-23 03:54:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:13,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:13,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:13,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:13,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:54:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:13,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:54:13,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:54:13,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:54:13,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096939603] [2021-11-23 03:54:13,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:54:13,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569335188] [2021-11-23 03:54:13,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569335188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:13,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:13,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:54:13,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314107071] [2021-11-23 03:54:13,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:13,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:54:13,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:13,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:54:13,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:54:13,545 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:54:13,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:13,633 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-11-23 03:54:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:54:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2021-11-23 03:54:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:13,644 INFO L225 Difference]: With dead ends: 42 [2021-11-23 03:54:13,644 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 03:54:13,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:54:13,651 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:13,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 63 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:54:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 03:54:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-23 03:54:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:54:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-23 03:54:13,691 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-11-23 03:54:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:13,693 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-23 03:54:13,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:54:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-23 03:54:13,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:54:13,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:13,695 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:13,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:13,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:13,923 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1457957052, now seen corresponding path program 1 times [2021-11-23 03:54:13,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:13,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91590189] [2021-11-23 03:54:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:13,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:13,941 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:54:13,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043824555] [2021-11-23 03:54:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:13,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:13,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:13,944 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:13,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:54:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:54:13,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:54:14,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:54:14,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:14,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91590189] [2021-11-23 03:54:14,117 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:54:14,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043824555] [2021-11-23 03:54:14,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043824555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:14,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:14,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:54:14,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747318546] [2021-11-23 03:54:14,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:14,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:54:14,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:14,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:54:14,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:54:14,124 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:54:14,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:14,191 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-11-23 03:54:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:54:14,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2021-11-23 03:54:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:14,192 INFO L225 Difference]: With dead ends: 32 [2021-11-23 03:54:14,193 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 03:54:14,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:54:14,195 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:14,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:54:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 03:54:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 03:54:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:54:14,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-23 03:54:14,203 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2021-11-23 03:54:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:14,203 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-23 03:54:14,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:54:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-23 03:54:14,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:54:14,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:14,205 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:14,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:14,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:14,431 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash -489488164, now seen corresponding path program 1 times [2021-11-23 03:54:14,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:14,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724599] [2021-11-23 03:54:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:14,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:14,453 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:54:14,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970743976] [2021-11-23 03:54:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:14,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:14,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:14,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:14,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:54:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:14,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 03:54:14,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:54:17,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:54:26,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:26,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724599] [2021-11-23 03:54:26,410 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:54:26,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970743976] [2021-11-23 03:54:26,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970743976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:54:26,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124458199] [2021-11-23 03:54:26,429 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:54:26,430 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:54:26,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:54:26,439 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:54:26,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:54:27,652 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2021-11-23 03:54:28,094 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2021-11-23 03:54:28,096 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:54:38,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '481#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_17| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_11| Int)) (and (<= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_17| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_17| 2147483648)) (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_18| 2147483647) (= (ite (= (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_11| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_12| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11|)) (* |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_18|)) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 (+ |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_18| 2147483648)) (or (and (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_11| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))))) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:54:38,549 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:54:38,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:54:38,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-11-23 03:54:38,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2704454] [2021-11-23 03:54:38,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:54:38,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:54:38,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:54:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=692, Unknown=1, NotChecked=0, Total=812 [2021-11-23 03:54:38,553 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 03:54:50,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:54:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:50,647 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-11-23 03:54:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:54:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 24 [2021-11-23 03:54:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:50,650 INFO L225 Difference]: With dead ends: 40 [2021-11-23 03:54:50,650 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 03:54:50,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=151, Invalid=904, Unknown=1, NotChecked=0, Total=1056 [2021-11-23 03:54:50,652 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:50,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 96 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 03:54:50,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 03:54:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-11-23 03:54:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 03:54:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-11-23 03:54:50,663 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 24 [2021-11-23 03:54:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:50,663 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-11-23 03:54:50,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 03:54:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-11-23 03:54:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:54:50,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:50,665 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:50,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 03:54:50,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:50,879 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash 750858559, now seen corresponding path program 1 times [2021-11-23 03:54:50,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:50,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311320807] [2021-11-23 03:54:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:50,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:50,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:54:50,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190028096] [2021-11-23 03:54:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:50,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:50,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:50,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:50,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:54:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:50,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:54:50,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:54:51,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:54:51,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:51,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311320807] [2021-11-23 03:54:51,183 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:54:51,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190028096] [2021-11-23 03:54:51,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190028096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:54:51,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993255833] [2021-11-23 03:54:51,187 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-23 03:54:51,187 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:54:51,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:54:51,188 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:54:51,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:54:52,312 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2021-11-23 03:54:53,040 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2021-11-23 03:54:53,042 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:55:00,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '801#(and (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_34| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_20| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_21| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_21| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_34| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_36| 2147483648)) (or (and (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_21| 0) (= |#NULL.base| 0))) (<= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_36| 2147483647) (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_34| 2147483647) (= |__VERIFIER_assert_#in~cond| (ite (= (* |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_36| |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_34|) (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_21| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_20| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_21|))) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:55:00,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:55:00,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:55:00,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-23 03:55:00,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913309011] [2021-11-23 03:55:00,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:00,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:55:00,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:00,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:55:00,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=495, Unknown=2, NotChecked=0, Total=600 [2021-11-23 03:55:00,783 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 03:55:02,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:55:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:02,870 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-11-23 03:55:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:55:02,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2021-11-23 03:55:02,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:02,872 INFO L225 Difference]: With dead ends: 43 [2021-11-23 03:55:02,872 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 03:55:02,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=118, Invalid=582, Unknown=2, NotChecked=0, Total=702 [2021-11-23 03:55:02,874 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:02,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 71 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 03:55:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 03:55:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-23 03:55:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 03:55:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-23 03:55:02,882 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2021-11-23 03:55:02,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:02,883 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-23 03:55:02,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 03:55:02,883 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-23 03:55:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 03:55:02,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:02,885 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:02,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:03,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:03,091 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:03,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:03,092 INFO L85 PathProgramCache]: Analyzing trace with hash -997597351, now seen corresponding path program 2 times [2021-11-23 03:55:03,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:03,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124546557] [2021-11-23 03:55:03,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:03,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:03,104 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:55:03,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089553989] [2021-11-23 03:55:03,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:55:03,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:03,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:03,113 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:03,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:55:03,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 03:55:03,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:55:03,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 03:55:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 03:55:04,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:13,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:13,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124546557] [2021-11-23 03:55:13,510 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:55:13,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089553989] [2021-11-23 03:55:13,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089553989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:13,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101483693] [2021-11-23 03:55:13,513 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:55:13,514 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:13,514 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:13,514 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:13,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:14,328 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2021-11-23 03:55:14,546 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2021-11-23 03:55:14,548 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:55:19,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1105#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_28| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_33| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_53| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_53| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_53| 2147483648)) (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_53| 2147483647) (<= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_53| 2147483647) (= |__VERIFIER_assert_#in~cond| (ite (= (* |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_53| |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_53|) (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_29| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_28| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_33|))) 1 0)) (<= 0 (+ |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_53| 2147483648)) (or (and (= |#NULL.offset| 0) (= |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_29| 0) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |#NULL.base| 0))))))' at error location [2021-11-23 03:55:19,570 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:55:19,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:55:19,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-23 03:55:19,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060156907] [2021-11-23 03:55:19,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:19,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:55:19,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:19,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:55:19,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=806, Unknown=1, NotChecked=0, Total=930 [2021-11-23 03:55:19,574 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 03:55:22,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:55:25,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:55:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:26,109 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-11-23 03:55:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:55:26,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 45 [2021-11-23 03:55:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:26,111 INFO L225 Difference]: With dead ends: 50 [2021-11-23 03:55:26,111 INFO L226 Difference]: Without dead ends: 48 [2021-11-23 03:55:26,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=166, Invalid=1093, Unknown=1, NotChecked=0, Total=1260 [2021-11-23 03:55:26,113 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:26,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 110 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 03:55:26,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-23 03:55:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-23 03:55:26,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 03:55:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-11-23 03:55:26,124 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 45 [2021-11-23 03:55:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:26,125 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-11-23 03:55:26,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-23 03:55:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-11-23 03:55:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 03:55:26,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:26,127 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:26,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:26,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:26,331 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1414540388, now seen corresponding path program 3 times [2021-11-23 03:55:26,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:26,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661427913] [2021-11-23 03:55:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:26,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:26,342 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:55:26,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2147179443] [2021-11-23 03:55:26,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:55:26,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:26,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:26,343 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:26,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:55:31,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:55:31,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:55:31,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-23 03:55:31,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:56:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 03:56:34,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:56:59,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:59,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661427913] [2021-11-23 03:56:59,500 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:56:59,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147179443] [2021-11-23 03:56:59,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147179443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:56:59,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1015226187] [2021-11-23 03:56:59,502 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:56:59,503 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:56:59,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:56:59,503 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:56:59,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:57:00,162 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2021-11-23 03:57:00,372 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2021-11-23 03:57:00,374 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:57:05,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1484#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_76| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_42| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_43| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_73| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_73| 2147483648)) (<= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_76| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_76| 2147483648)) (= (ite (= (* |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_73|) (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_43| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_47| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_42|))) 1 0) |__VERIFIER_assert_#in~cond|) (or (and (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_43| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))) (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_73| 2147483647))) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:57:05,253 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:57:05,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:57:05,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-23 03:57:05,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73583298] [2021-11-23 03:57:05,253 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:57:05,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:57:05,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:57:05,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:57:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1028, Unknown=8, NotChecked=0, Total=1190 [2021-11-23 03:57:05,255 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-23 03:57:09,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:57:11,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:57:14,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:57:16,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:57:18,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:57:50,418 WARN L227 SmtUtils]: Spent 27.10s on a formula simplification. DAG size of input: 268 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:57:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:57:50,516 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2021-11-23 03:57:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:57:50,517 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 52 [2021-11-23 03:57:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:57:50,518 INFO L225 Difference]: With dead ends: 56 [2021-11-23 03:57:50,519 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 03:57:50,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 73.3s TimeCoverageRelationStatistics Valid=179, Invalid=1217, Unknown=10, NotChecked=0, Total=1406 [2021-11-23 03:57:50,520 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 11 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:57:50,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 196 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 238 Invalid, 5 Unknown, 24 Unchecked, 13.7s Time] [2021-11-23 03:57:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 03:57:50,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-23 03:57:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 03:57:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-11-23 03:57:50,547 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 52 [2021-11-23 03:57:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:57:50,547 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-11-23 03:57:50,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-23 03:57:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-11-23 03:57:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 03:57:50,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:57:50,549 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:57:50,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:57:50,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:57:50,750 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:57:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:57:50,750 INFO L85 PathProgramCache]: Analyzing trace with hash 798891513, now seen corresponding path program 4 times [2021-11-23 03:57:50,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:57:50,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991554623] [2021-11-23 03:57:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:50,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:57:50,760 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:57:50,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834409626] [2021-11-23 03:57:50,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:57:50,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:57:50,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:57:50,763 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:57:50,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:57:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:50,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-23 03:57:50,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:41,535 WARN L227 SmtUtils]: Spent 6.72s on a formula simplification that was a NOOP. DAG size: 483 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:02:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 10 proven. 76 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-23 04:02:05,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:02:26,029 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:02:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991554623] [2021-11-23 04:02:26,029 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 04:02:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834409626] [2021-11-23 04:02:26,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834409626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 04:02:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057233981] [2021-11-23 04:02:26,032 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 04:02:26,032 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 04:02:26,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 04:02:26,033 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 04:02:26,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 04:02:26,671 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2021-11-23 04:02:26,836 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2021-11-23 04:02:26,838 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 04:02:36,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1900#(and (exists ((|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_102| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_57| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_62| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_95| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_102| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_95| 2147483648)) (or (and (= |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_58| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |#NULL.base| 0))) (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_95| 2147483647) (= |__VERIFIER_assert_#in~cond| (ite (= (* |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_102| |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_95|) (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_58| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_57| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_62|))) 1 0)) (<= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_102| 2147483647))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 04:02:36,229 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 04:02:36,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 04:02:36,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-23 04:02:36,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954142647] [2021-11-23 04:02:36,230 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 04:02:36,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 04:02:36,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:02:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 04:02:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1084, Unknown=7, NotChecked=0, Total=1260 [2021-11-23 04:02:36,232 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 14 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 04:02:39,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 04:02:43,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 04:02:45,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 04:02:47,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 04:02:50,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 04:03:48,794 WARN L227 SmtUtils]: Spent 52.78s on a formula simplification. DAG size of input: 491 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 04:03:49,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:03:49,839 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-11-23 04:03:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 04:03:49,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 14 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 59 [2021-11-23 04:03:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:03:49,841 INFO L225 Difference]: With dead ends: 64 [2021-11-23 04:03:49,841 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 04:03:49,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 106.0s TimeCoverageRelationStatistics Valid=194, Invalid=1279, Unknown=9, NotChecked=0, Total=1482 [2021-11-23 04:03:49,843 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 20 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2021-11-23 04:03:49,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 177 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 298 Invalid, 4 Unknown, 0 Unchecked, 15.3s Time] [2021-11-23 04:03:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 04:03:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-23 04:03:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 04:03:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-11-23 04:03:49,866 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 59 [2021-11-23 04:03:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:03:49,866 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-11-23 04:03:49,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 14 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 04:03:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-11-23 04:03:49,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 04:03:49,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:03:49,868 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 04:03:49,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 04:03:50,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:03:50,071 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:03:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:03:50,072 INFO L85 PathProgramCache]: Analyzing trace with hash -675946244, now seen corresponding path program 5 times [2021-11-23 04:03:50,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:03:50,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942061871] [2021-11-23 04:03:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:03:50,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:03:50,082 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 04:03:50,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884849236] [2021-11-23 04:03:50,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 04:03:50,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:03:50,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 04:03:50,086 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 04:03:50,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 04:03:50,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 04:03:50,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 04:03:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 04:03:50,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:03:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 32 proven. 79 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 04:03:52,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:03:57,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:03:57,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942061871] [2021-11-23 04:03:57,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 04:03:57,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884849236] [2021-11-23 04:03:57,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884849236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 04:03:57,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [783133098] [2021-11-23 04:03:57,093 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 04:03:57,093 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 04:03:57,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 04:03:57,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 04:03:57,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 04:03:57,756 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2021-11-23 04:03:57,930 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2021-11-23 04:03:57,933 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 04:04:04,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2335#(and (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_77| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_117| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_65| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_119| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_66| Int)) (and (or (and (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_66| 0) (= |#NULL.base| 0))) (= (ite (= (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_117| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_119|) (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_66| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_77| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_65|))) 1 0) |__VERIFIER_assert_#in~cond|) (<= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_119| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_119| 2147483648)) (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_117| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_117| 2147483648)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 04:04:04,800 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 04:04:04,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 04:04:04,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-23 04:04:04,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180330350] [2021-11-23 04:04:04,801 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 04:04:04,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 04:04:04,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:04:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 04:04:04,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=987, Unknown=3, NotChecked=0, Total=1122 [2021-11-23 04:04:04,802 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-23 04:04:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:04:05,909 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-11-23 04:04:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 04:04:05,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 66 [2021-11-23 04:04:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:04:05,911 INFO L225 Difference]: With dead ends: 69 [2021-11-23 04:04:05,911 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 04:04:05,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=145, Invalid=1112, Unknown=3, NotChecked=0, Total=1260 [2021-11-23 04:04:05,912 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 04:04:05,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 265 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 04:04:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 04:04:05,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 04:04:05,913 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) [2021-11-23 04:04:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 04:04:05,913 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2021-11-23 04:04:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:04:05,914 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 04:04:05,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-23 04:04:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 04:04:05,914 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 04:04:05,916 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 04:04:05,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 04:04:06,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3311b81-e52e-4a77-af58-da49d5105a1f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:04:06,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.