./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P --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 4cd3813e1162515d6dfe6f021a67e8bd41b689ea28e27900ea441d7fd3bbe5cc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:36:26,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:36:26,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:36:26,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:36:26,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:36:26,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:36:26,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:36:26,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:36:26,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:36:26,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:36:26,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:36:26,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:36:26,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:36:26,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:36:26,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:36:26,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:36:26,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:36:26,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:36:26,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:36:26,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:36:26,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:36:26,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:36:26,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:36:26,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:36:26,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:36:26,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:36:26,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:36:26,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:36:26,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:36:26,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:36:26,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:36:26,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:36:26,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:36:26,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:36:26,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:36:26,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:36:26,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:36:26,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:36:26,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:36:26,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:36:26,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:36:26,149 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:36:26,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:36:26,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:36:26,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:36:26,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:36:26,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:36:26,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:36:26,201 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:36:26,201 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:36:26,201 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:36:26,202 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:36:26,203 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:36:26,203 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:36:26,203 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:36:26,204 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:36:26,204 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:36:26,204 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:36:26,204 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:36:26,205 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:36:26,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:36:26,206 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:36:26,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:36:26,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:36:26,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:36:26,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:36:26,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:36:26,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:36:26,209 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:36:26,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:36:26,209 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:36:26,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:36:26,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:36:26,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:36:26,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:36:26,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:36:26,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:36:26,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:36:26,212 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:36:26,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:36:26,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:36:26,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:36:26,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:36:26,213 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_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd3813e1162515d6dfe6f021a67e8bd41b689ea28e27900ea441d7fd3bbe5cc [2021-11-20 23:36:26,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:36:26,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:36:26,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:36:26,549 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:36:26,549 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:36:26,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound10.c [2021-11-20 23:36:26,631 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/data/9de4ec0c6/1a825d58a4304aeca355c9f4f523d872/FLAGf3261028b [2021-11-20 23:36:27,044 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:36:27,044 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound10.c [2021-11-20 23:36:27,060 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/data/9de4ec0c6/1a825d58a4304aeca355c9f4f523d872/FLAGf3261028b [2021-11-20 23:36:27,443 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/data/9de4ec0c6/1a825d58a4304aeca355c9f4f523d872 [2021-11-20 23:36:27,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:36:27,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:36:27,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:27,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:36:27,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:36:27,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3544b9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27, skipping insertion in model container [2021-11-20 23:36:27,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:36:27,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:36:27,665 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_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound10.c[458,471] [2021-11-20 23:36:27,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:27,695 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:36:27,708 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_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound10.c[458,471] [2021-11-20 23:36:27,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:27,729 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:36:27,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27 WrapperNode [2021-11-20 23:36:27,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:27,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:36:27,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:36:27,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:36:27,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,781 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2021-11-20 23:36:27,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:36:27,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:36:27,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:36:27,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:36:27,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:36:27,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:36:27,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:36:27,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:36:27,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:36:27,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:27,843 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:36:27,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:36:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:36:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:36:27,886 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:36:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:36:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:36:27,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:36:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:36:27,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:36:27,937 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:36:27,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:36:28,043 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:36:28,062 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:36:28,062 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:36:28,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:28 BoogieIcfgContainer [2021-11-20 23:36:28,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:36:28,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:36:28,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:36:28,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:36:28,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:36:27" (1/3) ... [2021-11-20 23:36:28,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78663817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:28, skipping insertion in model container [2021-11-20 23:36:28,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (2/3) ... [2021-11-20 23:36:28,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78663817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:28, skipping insertion in model container [2021-11-20 23:36:28,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:28" (3/3) ... [2021-11-20 23:36:28,074 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound10.c [2021-11-20 23:36:28,080 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:36:28,080 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:36:28,128 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:36:28,136 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 [2021-11-20 23:36:28,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:36:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-11-20 23:36:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:36:28,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:28,159 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:28,160 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:28,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:28,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2113922188, now seen corresponding path program 1 times [2021-11-20 23:36:28,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:28,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248868382] [2021-11-20 23:36:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:28,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:36:28,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:28,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248868382] [2021-11-20 23:36:28,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248868382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:28,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:28,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:36:28,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053821092] [2021-11-20 23:36:28,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:28,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:36:28,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:36:28,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:36:28,359 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:36:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:28,449 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2021-11-20 23:36:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:36:28,452 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2021-11-20 23:36:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:28,459 INFO L225 Difference]: With dead ends: 32 [2021-11-20 23:36:28,459 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 23:36:28,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:36:28,482 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:28,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:36:28,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 23:36:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-20 23:36:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:36:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-20 23:36:28,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2021-11-20 23:36:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:28,554 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-20 23:36:28,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:36:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-20 23:36:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:36:28,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:28,556 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:28,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:36:28,557 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2066763035, now seen corresponding path program 1 times [2021-11-20 23:36:28,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:28,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703603275] [2021-11-20 23:36:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:28,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:28,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:36:28,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637051319] [2021-11-20 23:36:28,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:28,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:28,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:28,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:28,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:36:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:28,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:36:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:36:28,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:36:28,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703603275] [2021-11-20 23:36:28,796 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:36:28,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637051319] [2021-11-20 23:36:28,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637051319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:28,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:28,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:36:28,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757291605] [2021-11-20 23:36:28,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:28,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:28,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:28,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:28,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:28,815 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:36:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:28,912 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-11-20 23:36:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:36:28,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2021-11-20 23:36:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:28,915 INFO L225 Difference]: With dead ends: 28 [2021-11-20 23:36:28,917 INFO L226 Difference]: Without dead ends: 24 [2021-11-20 23:36:28,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:36:28,920 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:28,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 56 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-20 23:36:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-20 23:36:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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) [2021-11-20 23:36:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-20 23:36:28,933 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2021-11-20 23:36:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:28,933 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-20 23:36:28,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:36:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-20 23:36:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 23:36:28,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:28,935 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:28,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:29,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:29,164 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:29,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:29,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1985624712, now seen corresponding path program 1 times [2021-11-20 23:36:29,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:29,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713968978] [2021-11-20 23:36:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:29,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:29,182 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:36:29,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358599679] [2021-11-20 23:36:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:29,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:29,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:29,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:29,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:36:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:29,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 23:36:29,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:36:29,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:36:29,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:29,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713968978] [2021-11-20 23:36:29,628 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:36:29,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358599679] [2021-11-20 23:36:29,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358599679] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:29,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:36:29,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-20 23:36:29,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759287955] [2021-11-20 23:36:29,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:29,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:29,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:29,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:29,631 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 23:36:29,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:29,756 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-20 23:36:29,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:36:29,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-11-20 23:36:29,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:29,758 INFO L225 Difference]: With dead ends: 30 [2021-11-20 23:36:29,758 INFO L226 Difference]: Without dead ends: 26 [2021-11-20 23:36:29,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:36:29,760 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:29,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 46 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-20 23:36:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-20 23:36:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:36:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-20 23:36:29,770 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2021-11-20 23:36:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:29,771 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-20 23:36:29,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 23:36:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-20 23:36:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 23:36:29,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:29,773 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:29,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:29,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 23:36:30,000 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:30,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1002189902, now seen corresponding path program 1 times [2021-11-20 23:36:30,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:30,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089775323] [2021-11-20 23:36:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:30,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:30,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:36:30,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432043015] [2021-11-20 23:36:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:30,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:30,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:30,016 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:30,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:36:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:30,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:36:30,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 23:36:30,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:30,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:30,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089775323] [2021-11-20 23:36:30,570 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:36:30,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432043015] [2021-11-20 23:36:30,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432043015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:30,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [42619987] [2021-11-20 23:36:30,612 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-20 23:36:30,612 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:36:30,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:36:30,625 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:36:30,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:36:46,266 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2021-11-20 23:36:46,344 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 49 for LOIs [2021-11-20 23:36:46,440 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:36:46,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:36:46,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:36:46,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-20 23:36:46,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888958548] [2021-11-20 23:36:46,980 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 23:36:46,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:36:46,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:46,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:36:46,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:36:46,982 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 23:36:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:47,079 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-20 23:36:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:36:47,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2021-11-20 23:36:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:47,081 INFO L225 Difference]: With dead ends: 35 [2021-11-20 23:36:47,081 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 23:36:47,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:36:47,083 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:47,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 104 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 23:36:47,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-20 23:36:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:36:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-20 23:36:47,091 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 31 [2021-11-20 23:36:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:47,092 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-20 23:36:47,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 23:36:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-20 23:36:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 23:36:47,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:47,094 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:47,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:47,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:47,295 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:47,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:47,296 INFO L85 PathProgramCache]: Analyzing trace with hash -180873249, now seen corresponding path program 2 times [2021-11-20 23:36:47,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:47,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289364574] [2021-11-20 23:36:47,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:47,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:47,311 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:36:47,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845568067] [2021-11-20 23:36:47,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:36:47,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:47,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:47,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:47,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:36:47,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:36:47,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:36:47,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:36:47,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 23:36:48,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:48,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:48,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289364574] [2021-11-20 23:36:48,270 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:36:48,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845568067] [2021-11-20 23:36:48,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845568067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:48,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555338918] [2021-11-20 23:36:48,274 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-20 23:36:48,274 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:36:48,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:36:48,275 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:36:48,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:37:09,256 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-20 23:37:09,344 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 49 for LOIs [2021-11-20 23:37:09,428 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:37:09,952 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:37:09,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:37:09,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-20 23:37:09,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252762044] [2021-11-20 23:37:09,952 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 23:37:09,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:37:09,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:09,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:37:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-11-20 23:37:09,954 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 23:37:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:10,050 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-20 23:37:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:37:10,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2021-11-20 23:37:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:10,052 INFO L225 Difference]: With dead ends: 38 [2021-11-20 23:37:10,052 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 23:37:10,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:37:10,054 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:10,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 136 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:37:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 23:37:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-20 23:37:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 23:37:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-20 23:37:10,063 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 38 [2021-11-20 23:37:10,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:10,064 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-20 23:37:10,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 23:37:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-20 23:37:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 23:37:10,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:10,066 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:10,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:10,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:10,271 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:10,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:10,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1515507950, now seen corresponding path program 3 times [2021-11-20 23:37:10,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:10,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859389184] [2021-11-20 23:37:10,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:10,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:10,281 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:10,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820610781] [2021-11-20 23:37:10,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:37:10,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:10,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:10,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:10,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:37:10,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:37:10,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:37:10,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 23:37:10,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 23:37:10,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:10,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:10,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859389184] [2021-11-20 23:37:10,685 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:10,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820610781] [2021-11-20 23:37:10,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820610781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:37:10,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427046144] [2021-11-20 23:37:10,689 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-20 23:37:10,689 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:37:10,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:37:10,690 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:37:10,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:37:29,290 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2021-11-20 23:37:29,353 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 49 for LOIs [2021-11-20 23:37:29,421 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:37:29,869 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:37:29,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:37:29,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-20 23:37:29,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388693566] [2021-11-20 23:37:29,869 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 23:37:29,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:37:29,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:29,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:37:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:37:29,871 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-20 23:37:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:29,992 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-11-20 23:37:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:37:29,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 45 [2021-11-20 23:37:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:29,994 INFO L225 Difference]: With dead ends: 41 [2021-11-20 23:37:29,994 INFO L226 Difference]: Without dead ends: 35 [2021-11-20 23:37:29,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-20 23:37:29,996 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:29,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 172 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:37:29,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-20 23:37:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-20 23:37:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:37:30,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-20 23:37:30,010 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 45 [2021-11-20 23:37:30,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:30,010 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-20 23:37:30,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-20 23:37:30,011 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-20 23:37:30,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 23:37:30,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:30,012 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:30,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:30,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:30,228 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash 180103295, now seen corresponding path program 4 times [2021-11-20 23:37:30,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:30,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944961108] [2021-11-20 23:37:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:30,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:30,236 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:30,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111233141] [2021-11-20 23:37:30,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:37:30,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:30,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:30,238 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:30,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:37:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:30,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 23:37:30,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 23:37:31,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:31,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:31,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944961108] [2021-11-20 23:37:31,166 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:31,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111233141] [2021-11-20 23:37:31,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111233141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:37:31,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [801132593] [2021-11-20 23:37:31,169 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-20 23:37:31,169 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:37:31,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:37:31,170 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:37:31,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:37:43,936 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-20 23:37:44,033 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 49 for LOIs [2021-11-20 23:37:44,121 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:37:44,636 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:37:44,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:37:44,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-20 23:37:44,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134216868] [2021-11-20 23:37:44,636 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 23:37:44,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:37:44,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:44,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:37:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:37:44,638 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-20 23:37:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:44,760 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-11-20 23:37:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:37:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 52 [2021-11-20 23:37:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:44,762 INFO L225 Difference]: With dead ends: 44 [2021-11-20 23:37:44,762 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 23:37:44,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-11-20 23:37:44,763 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:44,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 212 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:37:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 23:37:44,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-20 23:37:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:37:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-20 23:37:44,772 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 52 [2021-11-20 23:37:44,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:44,773 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-20 23:37:44,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-20 23:37:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-20 23:37:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 23:37:44,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:44,774 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:44,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 23:37:44,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:44,979 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:44,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:44,979 INFO L85 PathProgramCache]: Analyzing trace with hash 321989234, now seen corresponding path program 5 times [2021-11-20 23:37:44,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:44,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709232649] [2021-11-20 23:37:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:44,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:44,989 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:44,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891189453] [2021-11-20 23:37:44,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:37:44,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:44,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:44,990 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:44,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:37:46,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 23:37:46,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:37:46,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 23:37:46,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 23:37:47,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:47,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:47,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709232649] [2021-11-20 23:37:47,285 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891189453] [2021-11-20 23:37:47,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891189453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:37:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711464979] [2021-11-20 23:37:47,287 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-20 23:37:47,287 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:37:47,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:37:47,288 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:37:47,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:38:18,181 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2021-11-20 23:38:18,251 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 49 for LOIs [2021-11-20 23:38:18,315 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:38:18,813 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:38:18,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:38:18,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-20 23:38:18,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202665316] [2021-11-20 23:38:18,813 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 23:38:18,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:38:18,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:38:18,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-11-20 23:38:18,815 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-20 23:38:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:19,014 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-11-20 23:38:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:38:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 59 [2021-11-20 23:38:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:19,015 INFO L225 Difference]: With dead ends: 47 [2021-11-20 23:38:19,015 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 23:38:19,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-11-20 23:38:19,017 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:19,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 256 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:38:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 23:38:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-20 23:38:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:38:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-11-20 23:38:19,027 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 59 [2021-11-20 23:38:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:19,028 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-11-20 23:38:19,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-20 23:38:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-11-20 23:38:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 23:38:19,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:19,030 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:19,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:19,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 23:38:19,232 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:38:19,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:19,232 INFO L85 PathProgramCache]: Analyzing trace with hash 151429407, now seen corresponding path program 6 times [2021-11-20 23:38:19,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:19,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204155056] [2021-11-20 23:38:19,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:19,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:19,249 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:38:19,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089551185] [2021-11-20 23:38:19,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:38:19,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:19,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:38:19,255 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:38:19,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:38:19,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:38:19,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:38:19,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 23:38:19,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-20 23:38:19,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:19,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:19,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204155056] [2021-11-20 23:38:19,727 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:38:19,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089551185] [2021-11-20 23:38:19,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089551185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:38:19,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [476726883] [2021-11-20 23:38:19,730 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-20 23:38:19,730 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:38:19,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:38:19,730 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:38:19,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:38:53,228 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-20 23:38:53,307 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 49 for LOIs [2021-11-20 23:38:53,378 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:38:53,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:38:53,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:38:53,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-20 23:38:53,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729320048] [2021-11-20 23:38:53,963 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 23:38:53,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:38:53,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:53,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:38:53,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-11-20 23:38:53,965 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-20 23:38:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:54,180 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2021-11-20 23:38:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:38:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 66 [2021-11-20 23:38:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:54,182 INFO L225 Difference]: With dead ends: 50 [2021-11-20 23:38:54,182 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 23:38:54,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-11-20 23:38:54,184 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:54,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 304 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:38:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 23:38:54,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-20 23:38:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 23:38:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-11-20 23:38:54,198 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 66 [2021-11-20 23:38:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:54,198 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-11-20 23:38:54,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-20 23:38:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-11-20 23:38:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 23:38:54,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:54,207 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:54,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:54,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 23:38:54,427 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:38:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:54,428 INFO L85 PathProgramCache]: Analyzing trace with hash -949240366, now seen corresponding path program 7 times [2021-11-20 23:38:54,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:54,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905826359] [2021-11-20 23:38:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:54,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:54,436 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:38:54,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459776233] [2021-11-20 23:38:54,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:38:54,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:54,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:38:54,437 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:38:54,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:38:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-20 23:38:56,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-20 23:38:56,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:56,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:56,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905826359] [2021-11-20 23:38:56,732 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:38:56,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459776233] [2021-11-20 23:38:56,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459776233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:38:56,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585004080] [2021-11-20 23:38:56,734 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-20 23:38:56,734 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:38:56,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:38:56,735 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:38:56,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:39:11,465 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2021-11-20 23:39:11,535 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 49 for LOIs [2021-11-20 23:39:11,598 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:39:12,159 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:39:12,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:39:12,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-20 23:39:12,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680132406] [2021-11-20 23:39:12,160 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 23:39:12,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 23:39:12,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:12,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 23:39:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-11-20 23:39:12,162 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-20 23:39:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:12,410 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-11-20 23:39:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 23:39:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 73 [2021-11-20 23:39:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:12,412 INFO L225 Difference]: With dead ends: 53 [2021-11-20 23:39:12,412 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 23:39:12,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-11-20 23:39:12,414 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:12,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 356 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:39:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 23:39:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-20 23:39:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 23:39:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-11-20 23:39:12,424 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 73 [2021-11-20 23:39:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:12,424 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-11-20 23:39:12,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-20 23:39:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-11-20 23:39:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 23:39:12,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:12,426 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:12,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:39:12,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 23:39:12,635 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1086423487, now seen corresponding path program 8 times [2021-11-20 23:39:12,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:12,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040111092] [2021-11-20 23:39:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:12,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:12,641 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:39:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657531462] [2021-11-20 23:39:12,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:39:12,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:39:12,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:39:12,645 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:39:12,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6bf683-2c0e-4156-b45b-66a4b9eaa1e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process