./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.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_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0eda672a1401330c428e19b34263886ea0c057fa2f6ccf2bc341fc3e3b3427c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:45:13,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:45:13,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:45:13,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:45:13,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:45:13,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:45:13,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:45:13,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:45:13,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:45:13,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:45:13,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:45:13,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:45:13,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:45:13,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:45:13,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:45:13,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:45:13,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:45:13,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:45:13,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:45:13,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:45:13,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:45:13,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:45:13,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:45:13,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:45:13,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:45:13,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:45:13,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:45:13,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:45:13,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:45:13,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:45:13,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:45:13,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:45:13,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:45:13,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:45:13,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:45:13,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:45:13,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:45:13,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:45:13,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:45:13,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:45:13,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:45:13,490 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:45:13,521 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:45:13,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:45:13,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:45:13,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:45:13,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:45:13,524 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:45:13,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:45:13,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:45:13,526 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:45:13,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:45:13,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:45:13,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:45:13,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:45:13,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:45:13,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:45:13,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:45:13,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:45:13,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:45:13,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:45:13,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:45:13,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:45:13,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:45:13,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:45:13,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:45:13,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:45:13,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:45:13,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:45:13,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:45:13,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:45:13,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:45:13,535 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:45:13,535 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:45:13,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:45:13,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:45:13,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0eda672a1401330c428e19b34263886ea0c057fa2f6ccf2bc341fc3e3b3427c [2021-11-20 05:45:13,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:45:13,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:45:13,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:45:13,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:45:13,872 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:45:13,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2021-11-20 05:45:13,954 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/data/e0ccdf17b/84c284b712ab4e93b07d131400235f5b/FLAGe8e9b7077 [2021-11-20 05:45:14,470 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:45:14,470 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2021-11-20 05:45:14,478 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/data/e0ccdf17b/84c284b712ab4e93b07d131400235f5b/FLAGe8e9b7077 [2021-11-20 05:45:14,827 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/data/e0ccdf17b/84c284b712ab4e93b07d131400235f5b [2021-11-20 05:45:14,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:45:14,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:45:14,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:45:14,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:45:14,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:45:14,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:45:14" (1/1) ... [2021-11-20 05:45:14,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5838a03b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:14, skipping insertion in model container [2021-11-20 05:45:14,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:45:14" (1/1) ... [2021-11-20 05:45:14,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:45:14,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:45:15,058 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_48edf0ef-fce9-411c-8efb-94752c193e55/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c[537,550] [2021-11-20 05:45:15,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:45:15,084 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:45:15,096 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_48edf0ef-fce9-411c-8efb-94752c193e55/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c[537,550] [2021-11-20 05:45:15,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:45:15,115 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:45:15,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15 WrapperNode [2021-11-20 05:45:15,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:45:15,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:45:15,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:45:15,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:45:15,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15" (1/1) ... [2021-11-20 05:45:15,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15" (1/1) ... [2021-11-20 05:45:15,176 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2021-11-20 05:45:15,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:45:15,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:45:15,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:45:15,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:45:15,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15" (1/1) ... [2021-11-20 05:45:15,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15" (1/1) ... [2021-11-20 05:45:15,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15" (1/1) ... [2021-11-20 05:45:15,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15" (1/1) ... [2021-11-20 05:45:15,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15" (1/1) ... [2021-11-20 05:45:15,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15" (1/1) ... [2021-11-20 05:45:15,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15" (1/1) ... [2021-11-20 05:45:15,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:45:15,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:45:15,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:45:15,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:45:15,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15" (1/1) ... [2021-11-20 05:45:15,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:45:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:15,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:45:15,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:45:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:45:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:45:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:45:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:45:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 05:45:15,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 05:45:15,441 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:45:15,443 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:45:15,639 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:45:15,646 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:45:15,646 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:45:15,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:45:15 BoogieIcfgContainer [2021-11-20 05:45:15,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:45:15,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:45:15,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:45:15,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:45:15,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:45:14" (1/3) ... [2021-11-20 05:45:15,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17eff5a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:45:15, skipping insertion in model container [2021-11-20 05:45:15,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:45:15" (2/3) ... [2021-11-20 05:45:15,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17eff5a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:45:15, skipping insertion in model container [2021-11-20 05:45:15,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:45:15" (3/3) ... [2021-11-20 05:45:15,659 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound5.c [2021-11-20 05:45:15,665 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:45:15,666 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:45:15,736 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:45:15,745 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=PETRI_NET, 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 05:45:15,745 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:45:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:45:15,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 05:45:15,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:15,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:15,773 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash -572597424, now seen corresponding path program 1 times [2021-11-20 05:45:15,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:15,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44765244] [2021-11-20 05:45:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:15,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:45:16,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:16,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44765244] [2021-11-20 05:45:16,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44765244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:45:16,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:45:16,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:45:16,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000667316] [2021-11-20 05:45:16,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:45:16,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:45:16,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:16,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:45:16,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:45:16,109 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:16,138 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-11-20 05:45:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:45:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 05:45:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:16,150 INFO L225 Difference]: With dead ends: 39 [2021-11-20 05:45:16,151 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 05:45:16,155 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 05:45:16,166 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:16,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:45:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 05:45:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-20 05:45:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:45:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-20 05:45:16,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2021-11-20 05:45:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:16,233 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-20 05:45:16,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-20 05:45:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 05:45:16,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:16,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:16,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:45:16,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:16,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:16,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1986366499, now seen corresponding path program 1 times [2021-11-20 05:45:16,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:16,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538608082] [2021-11-20 05:45:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:16,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:45:16,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:16,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538608082] [2021-11-20 05:45:16,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538608082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:45:16,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:45:16,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:45:16,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265541404] [2021-11-20 05:45:16,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:45:16,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:45:16,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:45:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:45:16,401 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:16,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:16,427 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-11-20 05:45:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:45:16,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 05:45:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:16,430 INFO L225 Difference]: With dead ends: 26 [2021-11-20 05:45:16,432 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 05:45:16,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:45:16,435 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:16,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:45:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 05:45:16,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 05:45:16,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:45:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-20 05:45:16,448 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2021-11-20 05:45:16,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:16,449 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-20 05:45:16,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-20 05:45:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 05:45:16,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:16,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:16,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:45:16,455 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:16,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1984579039, now seen corresponding path program 1 times [2021-11-20 05:45:16,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:16,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546406752] [2021-11-20 05:45:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:16,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:16,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:45:16,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471199994] [2021-11-20 05:45:16,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:16,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:16,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:16,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:16,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:45:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:16,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:45:16,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:45:16,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:45:16,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:16,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546406752] [2021-11-20 05:45:16,779 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:45:16,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471199994] [2021-11-20 05:45:16,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471199994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:45:16,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:45:16,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:45:16,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199482554] [2021-11-20 05:45:16,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:45:16,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:45:16,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:45:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:45:16,783 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:16,856 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-11-20 05:45:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:45:16,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 05:45:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:16,858 INFO L225 Difference]: With dead ends: 30 [2021-11-20 05:45:16,858 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 05:45:16,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 05:45:16,861 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:16,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:45:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 05:45:16,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-20 05:45:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:45:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-20 05:45:16,871 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2021-11-20 05:45:16,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:16,871 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-20 05:45:16,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:45:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-20 05:45:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 05:45:16,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:16,873 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:16,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:17,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:17,090 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash 845350648, now seen corresponding path program 1 times [2021-11-20 05:45:17,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:17,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573610812] [2021-11-20 05:45:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:17,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:17,105 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:45:17,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235564273] [2021-11-20 05:45:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:17,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:17,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:17,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:17,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:45:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:17,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:45:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:45:17,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:45:17,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:17,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573610812] [2021-11-20 05:45:17,259 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:45:17,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235564273] [2021-11-20 05:45:17,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235564273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:45:17,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:45:17,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:45:17,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620357174] [2021-11-20 05:45:17,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:45:17,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:45:17,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:17,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:45:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:45:17,262 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:45:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:17,333 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-20 05:45:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:45:17,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-20 05:45:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:17,335 INFO L225 Difference]: With dead ends: 34 [2021-11-20 05:45:17,335 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 05:45:17,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:45:17,337 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:17,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 44 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:45:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 05:45:17,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-20 05:45:17,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:45:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-20 05:45:17,345 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-11-20 05:45:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:17,346 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-20 05:45:17,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:45:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-20 05:45:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 05:45:17,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:17,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:17,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:17,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:17,564 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:17,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:17,564 INFO L85 PathProgramCache]: Analyzing trace with hash 905454657, now seen corresponding path program 1 times [2021-11-20 05:45:17,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:17,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850389474] [2021-11-20 05:45:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:17,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:17,574 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:45:17,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556819486] [2021-11-20 05:45:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:17,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:17,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:17,581 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:17,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:45:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:17,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:45:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:45:17,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:45:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:45:17,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:17,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850389474] [2021-11-20 05:45:17,823 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:45:17,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556819486] [2021-11-20 05:45:17,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556819486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:45:17,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:45:17,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-11-20 05:45:17,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531404177] [2021-11-20 05:45:17,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:45:17,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:45:17,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:17,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:45:17,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:45:17,827 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:45:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:17,901 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-11-20 05:45:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:45:17,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-20 05:45:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:17,903 INFO L225 Difference]: With dead ends: 62 [2021-11-20 05:45:17,904 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 05:45:17,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:45:17,929 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:17,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:45:17,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 05:45:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-11-20 05:45:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 05:45:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-11-20 05:45:17,943 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 20 [2021-11-20 05:45:17,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:17,943 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-11-20 05:45:17,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:45:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-11-20 05:45:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 05:45:17,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:17,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:17,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:18,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:18,171 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash 907242117, now seen corresponding path program 1 times [2021-11-20 05:45:18,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:18,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539834646] [2021-11-20 05:45:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:18,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:18,183 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:45:18,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851034544] [2021-11-20 05:45:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:18,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:18,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:18,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:18,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:45:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:18,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 05:45:18,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:45:23,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:45:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:45:30,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:30,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539834646] [2021-11-20 05:45:30,141 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:45:30,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851034544] [2021-11-20 05:45:30,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851034544] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:45:30,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:45:30,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-11-20 05:45:30,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825068969] [2021-11-20 05:45:30,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:45:30,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:45:30,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:30,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:45:30,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2021-11-20 05:45:30,144 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:45:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:35,746 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2021-11-20 05:45:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:45:35,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-20 05:45:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:35,750 INFO L225 Difference]: With dead ends: 86 [2021-11-20 05:45:35,750 INFO L226 Difference]: Without dead ends: 84 [2021-11-20 05:45:35,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=74, Invalid=304, Unknown=2, NotChecked=0, Total=380 [2021-11-20 05:45:35,752 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:35,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 111 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 05:45:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-20 05:45:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2021-11-20 05:45:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 05:45:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2021-11-20 05:45:35,771 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 20 [2021-11-20 05:45:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:35,772 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2021-11-20 05:45:35,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:45:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2021-11-20 05:45:35,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 05:45:35,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:35,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:35,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:35,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:35,999 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash 97895491, now seen corresponding path program 1 times [2021-11-20 05:45:36,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:36,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362505348] [2021-11-20 05:45:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:36,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:36,009 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:45:36,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918563699] [2021-11-20 05:45:36,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:36,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:36,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:36,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:36,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:45:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:36,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 05:45:36,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:45:38,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:45:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:45:39,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:39,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362505348] [2021-11-20 05:45:39,370 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:45:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918563699] [2021-11-20 05:45:39,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918563699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:45:39,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:45:39,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-11-20 05:45:39,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820701648] [2021-11-20 05:45:39,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:45:39,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 05:45:39,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 05:45:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:45:39,381 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:45:40,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:40,576 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2021-11-20 05:45:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:45:40,581 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-20 05:45:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:40,584 INFO L225 Difference]: With dead ends: 115 [2021-11-20 05:45:40,584 INFO L226 Difference]: Without dead ends: 104 [2021-11-20 05:45:40,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-11-20 05:45:40,586 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:40,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 94 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:45:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-20 05:45:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2021-11-20 05:45:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 05:45:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2021-11-20 05:45:40,604 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 20 [2021-11-20 05:45:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:40,604 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2021-11-20 05:45:40,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:45:40,605 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2021-11-20 05:45:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 05:45:40,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:40,606 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:40,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:40,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:45:40,831 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:40,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:40,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880860, now seen corresponding path program 1 times [2021-11-20 05:45:40,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:40,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066059097] [2021-11-20 05:45:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:40,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:40,839 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:45:40,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333406875] [2021-11-20 05:45:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:40,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:40,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:40,846 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:40,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:45:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:40,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:45:40,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:45:41,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:45:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:45:41,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:45:41,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066059097] [2021-11-20 05:45:41,210 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:45:41,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333406875] [2021-11-20 05:45:41,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333406875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:45:41,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:45:41,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-20 05:45:41,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98908487] [2021-11-20 05:45:41,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:45:41,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:45:41,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:45:41,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:45:41,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:45:41,214 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 05:45:43,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 05:45:45,271 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 05:45:45,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:45,325 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2021-11-20 05:45:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:45:45,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-20 05:45:45,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:45,326 INFO L225 Difference]: With dead ends: 92 [2021-11-20 05:45:45,326 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 05:45:45,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:45:45,328 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:45,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2021-11-20 05:45:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 05:45:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-11-20 05:45:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.140625) internal successors, (73), 66 states have internal predecessors, (73), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 05:45:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2021-11-20 05:45:45,344 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 26 [2021-11-20 05:45:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:45,345 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2021-11-20 05:45:45,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 05:45:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2021-11-20 05:45:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 05:45:45,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:45,347 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:45:45,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:45,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 05:45:45,555 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:45:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash -158147061, now seen corresponding path program 1 times [2021-11-20 05:45:45,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:45:45,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638555759] [2021-11-20 05:45:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:45,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:45:45,565 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:45:45,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987966737] [2021-11-20 05:45:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:45,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:45:45,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:45:45,567 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:45:45,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:45:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:45,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 05:45:45,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:45:57,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:46:04,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:46:04,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638555759] [2021-11-20 05:46:04,056 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:46:04,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987966737] [2021-11-20 05:46:04,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987966737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:46:04,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:46:04,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2021-11-20 05:46:04,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684928556] [2021-11-20 05:46:04,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:46:04,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:46:04,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:46:04,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:46:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=446, Unknown=2, NotChecked=0, Total=552 [2021-11-20 05:46:04,063 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 05:46:06,599 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 05:46:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:20,293 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2021-11-20 05:46:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 05:46:20,294 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2021-11-20 05:46:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:20,296 INFO L225 Difference]: With dead ends: 125 [2021-11-20 05:46:20,296 INFO L226 Difference]: Without dead ends: 123 [2021-11-20 05:46:20,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=202, Invalid=916, Unknown=4, NotChecked=0, Total=1122 [2021-11-20 05:46:20,299 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:20,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 207 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 258 Invalid, 1 Unknown, 55 Unchecked, 4.7s Time] [2021-11-20 05:46:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-20 05:46:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2021-11-20 05:46:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 94 states have (on average 1.148936170212766) internal successors, (108), 99 states have internal predecessors, (108), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (13), 9 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 05:46:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2021-11-20 05:46:20,321 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 40 [2021-11-20 05:46:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:20,322 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2021-11-20 05:46:20,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 05:46:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2021-11-20 05:46:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 05:46:20,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:20,326 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:20,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:20,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:20,539 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:46:20,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:20,540 INFO L85 PathProgramCache]: Analyzing trace with hash -957536403, now seen corresponding path program 2 times [2021-11-20 05:46:20,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:46:20,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538873537] [2021-11-20 05:46:20,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:20,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:46:20,552 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:46:20,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454747289] [2021-11-20 05:46:20,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:46:20,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:20,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:46:20,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:46:20,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:46:20,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:46:20,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:46:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:46:20,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:20,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 05:46:21,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:46:21,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538873537] [2021-11-20 05:46:21,002 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:46:21,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454747289] [2021-11-20 05:46:21,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454747289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:46:21,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:46:21,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-11-20 05:46:21,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259755482] [2021-11-20 05:46:21,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:46:21,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:46:21,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:46:21,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:46:21,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:46:21,010 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 05:46:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:21,105 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2021-11-20 05:46:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:46:21,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-11-20 05:46:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:21,107 INFO L225 Difference]: With dead ends: 152 [2021-11-20 05:46:21,108 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 05:46:21,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:46:21,109 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:21,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 91 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:46:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 05:46:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2021-11-20 05:46:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 109 states have internal predecessors, (119), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 05:46:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2021-11-20 05:46:21,132 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 50 [2021-11-20 05:46:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:21,133 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2021-11-20 05:46:21,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 05:46:21,133 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2021-11-20 05:46:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 05:46:21,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:21,136 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:21,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 05:46:21,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:21,347 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:46:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -493632277, now seen corresponding path program 2 times [2021-11-20 05:46:21,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:46:21,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84665588] [2021-11-20 05:46:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:21,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:46:21,369 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:46:21,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821707531] [2021-11-20 05:46:21,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:46:21,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:21,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:46:21,379 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:46:21,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:46:21,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:46:21,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:46:21,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 05:46:21,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 05:46:34,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 05:46:54,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:46:54,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84665588] [2021-11-20 05:46:54,161 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:46:54,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821707531] [2021-11-20 05:46:54,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821707531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:46:54,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:46:54,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 26 [2021-11-20 05:46:54,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569805810] [2021-11-20 05:46:54,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:46:54,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 05:46:54,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:46:54,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 05:46:54,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=532, Unknown=4, NotChecked=0, Total=650 [2021-11-20 05:46:54,165 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 05:46:57,288 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse7 (= (mod |c_ULTIMATE.start_main_~y~0#1| 2) 0))) (let ((.cse4 (div |c_ULTIMATE.start_main_~y~0#1| 2)) (.cse16 (not .cse7))) (let ((.cse2 (* 4 |c_ULTIMATE.start_main_~x~0#1|)) (.cse6 (and (< |c_ULTIMATE.start_main_~y~0#1| 0) .cse16)) (.cse11 (+ 1 .cse4)) (.cse8 (<= 0 |c_ULTIMATE.start_main_~y~0#1|)) (.cse13 (* 2 (* |c_ULTIMATE.start_main_~x~0#1| .cse4))) (.cse12 (<= 1 |c_ULTIMATE.start_main_~b~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (and (let ((.cse5 (mod .cse4 2))) (or (let ((.cse3 (= .cse5 0)) (.cse1 (* 4 (* |c_ULTIMATE.start_main_~x~0#1| (div .cse4 2))))) (and (or (= .cse0 (+ .cse1 |c_ULTIMATE.start_main_~z~0#1| .cse2)) .cse3) (or (not .cse3) (= (+ .cse1 |c_ULTIMATE.start_main_~z~0#1|) .cse0)))) (and (<= 0 .cse4) (= .cse5 1)) .cse6)) (or .cse7 .cse8 (let ((.cse9 (= (mod .cse11 2) 0)) (.cse10 (* 4 (* |c_ULTIMATE.start_main_~x~0#1| (div .cse11 2))))) (and (or (not .cse9) (= .cse0 (+ |c_ULTIMATE.start_main_~z~0#1| .cse10))) (or .cse9 (= .cse0 (+ |c_ULTIMATE.start_main_~z~0#1| .cse10 .cse2)))))) (or (and (< |c_ULTIMATE.start_main_~b~0#1| 1) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (and (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1) .cse12)) (or .cse6 (= .cse0 (+ |c_ULTIMATE.start_main_~z~0#1| .cse13))) (let ((.cse15 (+ (* (- 1) |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~z~0#1|))) (let ((.cse14 (div (div .cse15 (- 2)) |c_ULTIMATE.start_main_~x~0#1|))) (or (<= 0 .cse14) (not (= (mod .cse15 (- 2)) 0)) (not (= (mod (div (+ |c_ULTIMATE.start_main_~z~0#1| (- .cse0)) (- 2)) |c_ULTIMATE.start_main_~x~0#1|) 0)) (and (= (mod (div .cse14 2) 2) 0) (= (mod .cse14 2) 0)) (= |c_ULTIMATE.start_main_~x~0#1| 0) (and (or (not (= .cse14 .cse11)) .cse7) (or (not (= .cse14 .cse4)) .cse16))))) (or .cse7 .cse8 (= .cse0 (+ (* 2 |c_ULTIMATE.start_main_~x~0#1|) |c_ULTIMATE.start_main_~z~0#1| .cse13))) .cse12 (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1|) |c_ULTIMATE.start_main_~z~0#1|) .cse0))))) is different from false [2021-11-20 05:47:22,949 WARN L227 SmtUtils]: Spent 13.41s on a formula simplification. DAG size of input: 94 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:47:41,161 WARN L227 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 106 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:47:50,775 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 05:48:00,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:00,149 INFO L93 Difference]: Finished difference Result 200 states and 234 transitions. [2021-11-20 05:48:00,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:48:00,150 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2021-11-20 05:48:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:00,153 INFO L225 Difference]: With dead ends: 200 [2021-11-20 05:48:00,153 INFO L226 Difference]: Without dead ends: 198 [2021-11-20 05:48:00,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 76.2s TimeCoverageRelationStatistics Valid=395, Invalid=1670, Unknown=9, NotChecked=88, Total=2162 [2021-11-20 05:48:00,156 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:00,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 288 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 472 Invalid, 0 Unknown, 1 Unchecked, 8.0s Time] [2021-11-20 05:48:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-20 05:48:00,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 191. [2021-11-20 05:48:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 154 states have (on average 1.1688311688311688) internal successors, (180), 159 states have internal predecessors, (180), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (22), 18 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 05:48:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 225 transitions. [2021-11-20 05:48:00,192 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 225 transitions. Word has length 50 [2021-11-20 05:48:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:00,193 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 225 transitions. [2021-11-20 05:48:00,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 05:48:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 225 transitions. [2021-11-20 05:48:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 05:48:00,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:00,197 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:00,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:00,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:00,411 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:48:00,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:00,412 INFO L85 PathProgramCache]: Analyzing trace with hash 510370769, now seen corresponding path program 3 times [2021-11-20 05:48:00,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:00,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269837896] [2021-11-20 05:48:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:00,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:00,419 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:48:00,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035913387] [2021-11-20 05:48:00,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:48:00,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:00,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:00,422 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:00,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:48:00,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 05:48:00,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-20 05:48:00,547 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 05:48:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:48:00,651 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 05:48:00,652 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 05:48:00,653 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 05:48:00,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-20 05:48:00,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:00,886 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:00,888 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 05:48:00,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 05:48:00 BoogieIcfgContainer [2021-11-20 05:48:00,963 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 05:48:00,963 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 05:48:00,963 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 05:48:00,964 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 05:48:00,964 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:45:15" (3/4) ... [2021-11-20 05:48:00,965 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 05:48:01,052 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 05:48:01,052 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 05:48:01,053 INFO L158 Benchmark]: Toolchain (without parser) took 166215.14ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 51.6MB in the beginning and 75.9MB in the end (delta: -24.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:48:01,054 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 88.1MB. Free memory was 68.0MB in the beginning and 68.0MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:48:01,054 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.97ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 51.4MB in the beginning and 84.4MB in the end (delta: -33.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 05:48:01,055 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.67ms. Allocated memory is still 109.1MB. Free memory was 84.1MB in the beginning and 82.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:48:01,055 INFO L158 Benchmark]: Boogie Preprocessor took 51.46ms. Allocated memory is still 109.1MB. Free memory was 82.9MB in the beginning and 81.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 05:48:01,056 INFO L158 Benchmark]: RCFGBuilder took 418.18ms. Allocated memory is still 109.1MB. Free memory was 81.7MB in the beginning and 72.4MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 05:48:01,056 INFO L158 Benchmark]: TraceAbstraction took 165312.36ms. Allocated memory is still 109.1MB. Free memory was 71.8MB in the beginning and 80.1MB in the end (delta: -8.3MB). Peak memory consumption was 50.5MB. Max. memory is 16.1GB. [2021-11-20 05:48:01,056 INFO L158 Benchmark]: Witness Printer took 89.33ms. Allocated memory is still 109.1MB. Free memory was 80.1MB in the beginning and 75.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 05:48:01,059 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 88.1MB. Free memory was 68.0MB in the beginning and 68.0MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 275.97ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 51.4MB in the beginning and 84.4MB in the end (delta: -33.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.67ms. Allocated memory is still 109.1MB. Free memory was 84.1MB in the beginning and 82.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 51.46ms. Allocated memory is still 109.1MB. Free memory was 82.9MB in the beginning and 81.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 418.18ms. Allocated memory is still 109.1MB. Free memory was 81.7MB in the beginning and 72.4MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 165312.36ms. Allocated memory is still 109.1MB. Free memory was 71.8MB in the beginning and 80.1MB in the end (delta: -8.3MB). Peak memory consumption was 50.5MB. Max. memory is 16.1GB. * Witness Printer took 89.33ms. Allocated memory is still 109.1MB. Free memory was 80.1MB in the beginning and 75.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) [L10] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L27] RET assume_abort_if_not(b >= 1) [L29] x = a [L30] y = b [L31] z = 0 VAL [a=-2, b=63, counter=0, x=-2, y=63, z=0] [L33] EXPR counter++ VAL [a=-2, b=63, counter=1, counter++=0, x=-2, y=63, z=0] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=63, counter=1, x=-2, y=63, z=0] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=63, counter=1, x=-2, y=63, z=0] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=63, counter=1, x=-2, y=62, z=-2] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=63, counter=1, x=-4, y=31, z=-2] [L33] EXPR counter++ VAL [a=-2, b=63, counter=2, counter++=1, x=-4, y=31, z=-2] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=2] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=63, counter=2, x=-4, y=31, z=-2] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=63, counter=2, x=-4, y=31, z=-2] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=63, counter=2, x=-4, y=30, z=-6] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=63, counter=2, x=-8, y=15, z=-6] [L33] EXPR counter++ VAL [a=-2, b=63, counter=3, counter++=2, x=-8, y=15, z=-6] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=3] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=63, counter=3, x=-8, y=15, z=-6] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=63, counter=3, x=-8, y=15, z=-6] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=63, counter=3, x=-8, y=14, z=-14] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=63, counter=3, x=-16, y=7, z=-14] [L33] EXPR counter++ VAL [a=-2, b=63, counter=4, counter++=3, x=-16, y=7, z=-14] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=4] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=63, counter=4, x=-16, y=7, z=-14] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=63, counter=4, x=-16, y=7, z=-14] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=63, counter=4, x=-16, y=6, z=-30] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=63, counter=4, x=-32, y=3, z=-30] [L33] EXPR counter++ VAL [a=-2, b=63, counter=5, counter++=4, x=-32, y=3, z=-30] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=5] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=63, counter=5, x=-32, y=3, z=-30] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=63, counter=5, x=-32, y=3, z=-30] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=63, counter=5, x=-32, y=2, z=-62] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=63, counter=5, x=-64, y=1, z=-62] [L33] EXPR counter++ VAL [a=-2, b=63, counter=6, counter++=5, x=-64, y=1, z=-62] [L33] COND FALSE !(counter++<5) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, counter=6] [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L15] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 165.2s, OverallIterations: 12, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 93.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 362 SdHoareTripleChecker+Valid, 18.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 357 mSDsluCounter, 1124 SdHoareTripleChecker+Invalid, 18.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 56 IncrementalHoareTripleChecker+Unchecked, 927 mSDsCounter, 201 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1233 IncrementalHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 201 mSolverCounterUnsat, 197 mSDtfsCounter, 1233 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 536 GetRequests, 361 SyntacticMatches, 14 SemanticMatches, 161 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 113.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=191occurred in iteration=11, InterpolantAutomatonStates: 127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 63 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 67.6s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 479 ConstructedInterpolants, 6 QuantifiedInterpolants, 5057 SizeOfPredicates, 34 NumberOfNonLiveVariables, 876 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 217/456 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 05:48:01,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48edf0ef-fce9-411c-8efb-94752c193e55/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE