./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa --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 3db5e6ee1090a5741e563a010c3676d5357df7fec89fabe5a888b2d307357a0e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:24:38,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:24:38,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:24:38,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:24:38,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:24:38,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:24:38,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:24:38,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:24:38,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:24:38,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:24:38,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:24:38,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:24:38,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:24:38,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:24:38,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:24:38,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:24:38,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:24:38,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:24:38,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:24:38,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:24:38,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:24:38,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:24:38,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:24:38,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:24:38,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:24:38,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:24:38,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:24:38,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:24:38,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:24:38,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:24:38,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:24:38,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:24:38,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:24:38,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:24:38,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:24:38,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:24:38,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:24:38,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:24:38,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:24:38,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:24:38,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:24:38,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 01:24:38,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:24:38,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:24:38,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:24:38,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:24:38,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:24:38,286 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:24:38,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:24:38,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:24:38,286 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:24:38,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:24:38,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:24:38,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:24:38,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:24:38,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:24:38,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:24:38,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:24:38,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:24:38,288 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:24:38,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:24:38,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:24:38,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:24:38,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:24:38,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:24:38,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:24:38,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:24:38,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:24:38,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:24:38,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:24:38,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:24:38,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:24:38,289 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:24:38,289 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:24:38,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:24:38,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:24:38,290 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_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3db5e6ee1090a5741e563a010c3676d5357df7fec89fabe5a888b2d307357a0e [2021-12-07 01:24:38,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:24:38,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:24:38,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:24:38,504 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:24:38,505 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:24:38,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-2.i [2021-12-07 01:24:38,549 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/data/b55c750fb/d251e867d7ef458c9fbf0d6fe57df5dd/FLAGb335a6e7c [2021-12-07 01:24:39,052 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:24:39,053 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-2.i [2021-12-07 01:24:39,070 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/data/b55c750fb/d251e867d7ef458c9fbf0d6fe57df5dd/FLAGb335a6e7c [2021-12-07 01:24:39,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/data/b55c750fb/d251e867d7ef458c9fbf0d6fe57df5dd [2021-12-07 01:24:39,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:24:39,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:24:39,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:24:39,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:24:39,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:24:39,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:24:39" (1/1) ... [2021-12-07 01:24:39,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64347434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:39, skipping insertion in model container [2021-12-07 01:24:39,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:24:39" (1/1) ... [2021-12-07 01:24:39,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:24:39,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:24:39,918 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_bed8c3da-ff78-4676-be6b-4a96e4552deb/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-2.i[33022,33035] [2021-12-07 01:24:40,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:24:40,052 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:24:40,075 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_bed8c3da-ff78-4676-be6b-4a96e4552deb/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-2.i[33022,33035] [2021-12-07 01:24:40,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:24:40,187 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:24:40,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40 WrapperNode [2021-12-07 01:24:40,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:24:40,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:24:40,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:24:40,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:24:40,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40" (1/1) ... [2021-12-07 01:24:40,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40" (1/1) ... [2021-12-07 01:24:40,293 INFO L137 Inliner]: procedures = 177, calls = 575, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2330 [2021-12-07 01:24:40,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:24:40,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:24:40,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:24:40,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:24:40,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40" (1/1) ... [2021-12-07 01:24:40,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40" (1/1) ... [2021-12-07 01:24:40,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40" (1/1) ... [2021-12-07 01:24:40,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40" (1/1) ... [2021-12-07 01:24:40,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40" (1/1) ... [2021-12-07 01:24:40,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40" (1/1) ... [2021-12-07 01:24:40,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40" (1/1) ... [2021-12-07 01:24:40,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:24:40,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:24:40,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:24:40,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:24:40,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40" (1/1) ... [2021-12-07 01:24:40,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:24:40,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:40,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:24:40,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:24:40,455 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-07 01:24:40,455 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-07 01:24:40,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 01:24:40,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 01:24:40,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 01:24:40,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 01:24:40,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-07 01:24:40,456 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-07 01:24:40,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:24:40,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:24:40,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:24:40,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:24:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-07 01:24:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:24:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:24:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:24:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:24:40,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:24:40,661 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:24:40,662 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:24:41,839 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:24:41,848 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:24:41,848 INFO L301 CfgBuilder]: Removed 160 assume(true) statements. [2021-12-07 01:24:41,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:24:41 BoogieIcfgContainer [2021-12-07 01:24:41,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:24:41,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:24:41,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:24:41,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:24:41,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:24:39" (1/3) ... [2021-12-07 01:24:41,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f59a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:24:41, skipping insertion in model container [2021-12-07 01:24:41,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:24:40" (2/3) ... [2021-12-07 01:24:41,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f59a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:24:41, skipping insertion in model container [2021-12-07 01:24:41,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:24:41" (3/3) ... [2021-12-07 01:24:41,856 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test10-2.i [2021-12-07 01:24:41,860 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:24:41,860 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:24:41,897 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:24:41,902 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 [2021-12-07 01:24:41,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:24:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 457 states, 438 states have (on average 1.7100456621004567) internal successors, (749), 443 states have internal predecessors, (749), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-07 01:24:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:24:41,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:41,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:41,929 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1709343748, now seen corresponding path program 1 times [2021-12-07 01:24:41,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:41,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28635761] [2021-12-07 01:24:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:41,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:24:42,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:42,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28635761] [2021-12-07 01:24:42,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28635761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:42,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:42,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:24:42,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213076893] [2021-12-07 01:24:42,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:42,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 01:24:42,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 01:24:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:24:42,094 INFO L87 Difference]: Start difference. First operand has 457 states, 438 states have (on average 1.7100456621004567) internal successors, (749), 443 states have internal predecessors, (749), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:42,165 INFO L93 Difference]: Finished difference Result 912 states and 1560 transitions. [2021-12-07 01:24:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:24:42,167 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-07 01:24:42,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:42,181 INFO L225 Difference]: With dead ends: 912 [2021-12-07 01:24:42,182 INFO L226 Difference]: Without dead ends: 424 [2021-12-07 01:24:42,187 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 [2021-12-07 01:24:42,191 INFO L933 BasicCegarLoop]: 609 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, 609 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 [2021-12-07 01:24:42,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:24:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-07 01:24:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2021-12-07 01:24:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 406 states have (on average 1.3251231527093597) internal successors, (538), 411 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:24:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 565 transitions. [2021-12-07 01:24:42,259 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 565 transitions. Word has length 13 [2021-12-07 01:24:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:42,259 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 565 transitions. [2021-12-07 01:24:42,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 565 transitions. [2021-12-07 01:24:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 01:24:42,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:42,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:42,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:24:42,263 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:42,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash 467454242, now seen corresponding path program 1 times [2021-12-07 01:24:42,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:42,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725865145] [2021-12-07 01:24:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:42,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:24:42,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:42,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725865145] [2021-12-07 01:24:42,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725865145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:42,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:42,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:24:42,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333374869] [2021-12-07 01:24:42,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:42,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:24:42,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:42,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:24:42,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:24:42,359 INFO L87 Difference]: Start difference. First operand 424 states and 565 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:42,873 INFO L93 Difference]: Finished difference Result 745 states and 997 transitions. [2021-12-07 01:24:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:24:42,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-07 01:24:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:42,876 INFO L225 Difference]: With dead ends: 745 [2021-12-07 01:24:42,877 INFO L226 Difference]: Without dead ends: 499 [2021-12-07 01:24:42,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:24:42,879 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 96 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:42,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1479 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:24:42,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-12-07 01:24:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 426. [2021-12-07 01:24:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 408 states have (on average 1.3235294117647058) internal successors, (540), 413 states have internal predecessors, (540), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:24:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 567 transitions. [2021-12-07 01:24:42,897 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 567 transitions. Word has length 48 [2021-12-07 01:24:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:42,898 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 567 transitions. [2021-12-07 01:24:42,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:42,898 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 567 transitions. [2021-12-07 01:24:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 01:24:42,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:42,902 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:42,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 01:24:42,907 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:42,908 INFO L85 PathProgramCache]: Analyzing trace with hash 107479508, now seen corresponding path program 1 times [2021-12-07 01:24:42,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:42,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709947122] [2021-12-07 01:24:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:42,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:42,997 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:42,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329461547] [2021-12-07 01:24:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:42,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:42,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:42,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:43,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:24:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:43,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:24:43,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:24:43,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:43,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:43,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709947122] [2021-12-07 01:24:43,489 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:43,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329461547] [2021-12-07 01:24:43,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329461547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:43,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:43,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:24:43,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702220923] [2021-12-07 01:24:43,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:43,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:24:43,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:24:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:43,491 INFO L87 Difference]: Start difference. First operand 426 states and 567 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:43,544 INFO L93 Difference]: Finished difference Result 869 states and 1161 transitions. [2021-12-07 01:24:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:24:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-07 01:24:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:43,548 INFO L225 Difference]: With dead ends: 869 [2021-12-07 01:24:43,548 INFO L226 Difference]: Without dead ends: 447 [2021-12-07 01:24:43,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:43,551 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:43,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:24:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-07 01:24:43,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 446. [2021-12-07 01:24:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 428 states have (on average 1.308411214953271) internal successors, (560), 433 states have internal predecessors, (560), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:24:43,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 587 transitions. [2021-12-07 01:24:43,570 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 587 transitions. Word has length 101 [2021-12-07 01:24:43,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:43,570 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 587 transitions. [2021-12-07 01:24:43,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:43,571 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 587 transitions. [2021-12-07 01:24:43,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 01:24:43,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:43,575 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:43,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:24:43,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:43,776 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:43,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1165317586, now seen corresponding path program 1 times [2021-12-07 01:24:43,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:43,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962500487] [2021-12-07 01:24:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:43,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:43,949 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:43,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104351338] [2021-12-07 01:24:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:43,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:43,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:43,951 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:43,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:24:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:44,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:24:44,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:24:44,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:44,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:44,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962500487] [2021-12-07 01:24:44,431 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:44,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104351338] [2021-12-07 01:24:44,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104351338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:44,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:44,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:24:44,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660044117] [2021-12-07 01:24:44,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:44,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:24:44,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:44,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:24:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:44,433 INFO L87 Difference]: Start difference. First operand 446 states and 587 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:44,485 INFO L93 Difference]: Finished difference Result 701 states and 934 transitions. [2021-12-07 01:24:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:24:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-07 01:24:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:44,489 INFO L225 Difference]: With dead ends: 701 [2021-12-07 01:24:44,489 INFO L226 Difference]: Without dead ends: 467 [2021-12-07 01:24:44,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:44,491 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:44,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:24:44,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-07 01:24:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 466. [2021-12-07 01:24:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 448 states have (on average 1.2946428571428572) internal successors, (580), 453 states have internal predecessors, (580), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:24:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 607 transitions. [2021-12-07 01:24:44,509 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 607 transitions. Word has length 101 [2021-12-07 01:24:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:44,510 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 607 transitions. [2021-12-07 01:24:44,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 607 transitions. [2021-12-07 01:24:44,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 01:24:44,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:44,511 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:44,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:24:44,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:44,713 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:44,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash 946462868, now seen corresponding path program 1 times [2021-12-07 01:24:44,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:44,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55791077] [2021-12-07 01:24:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:44,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:44,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:44,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931400874] [2021-12-07 01:24:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:44,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:44,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:44,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:44,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:24:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:45,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:24:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:24:45,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:45,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:45,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55791077] [2021-12-07 01:24:45,305 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:45,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931400874] [2021-12-07 01:24:45,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931400874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:45,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:45,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:24:45,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65365558] [2021-12-07 01:24:45,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:45,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:24:45,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:45,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:24:45,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:24:45,307 INFO L87 Difference]: Start difference. First operand 466 states and 607 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:45,361 INFO L93 Difference]: Finished difference Result 1004 states and 1314 transitions. [2021-12-07 01:24:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:24:45,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-07 01:24:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:45,364 INFO L225 Difference]: With dead ends: 1004 [2021-12-07 01:24:45,364 INFO L226 Difference]: Without dead ends: 542 [2021-12-07 01:24:45,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:24:45,366 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 506 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:45,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1402 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:24:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-12-07 01:24:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 452. [2021-12-07 01:24:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 434 states have (on average 1.2880184331797235) internal successors, (559), 439 states have internal predecessors, (559), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:24:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 586 transitions. [2021-12-07 01:24:45,378 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 586 transitions. Word has length 101 [2021-12-07 01:24:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:45,379 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 586 transitions. [2021-12-07 01:24:45,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:45,379 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 586 transitions. [2021-12-07 01:24:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 01:24:45,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:45,380 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:45,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:24:45,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:45,581 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:45,581 INFO L85 PathProgramCache]: Analyzing trace with hash 2000259362, now seen corresponding path program 1 times [2021-12-07 01:24:45,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:45,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880648256] [2021-12-07 01:24:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:45,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:45,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:45,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877011445] [2021-12-07 01:24:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:45,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:45,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:45,653 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:45,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:24:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:46,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:24:46,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:24:46,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:46,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:46,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880648256] [2021-12-07 01:24:46,185 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:46,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877011445] [2021-12-07 01:24:46,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877011445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:46,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:46,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:24:46,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266130114] [2021-12-07 01:24:46,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:46,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:24:46,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:46,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:24:46,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:24:46,187 INFO L87 Difference]: Start difference. First operand 452 states and 586 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:46,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:46,249 INFO L93 Difference]: Finished difference Result 675 states and 882 transitions. [2021-12-07 01:24:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:24:46,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-07 01:24:46,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:46,252 INFO L225 Difference]: With dead ends: 675 [2021-12-07 01:24:46,252 INFO L226 Difference]: Without dead ends: 439 [2021-12-07 01:24:46,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:24:46,253 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 287 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:46,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1308 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:24:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-07 01:24:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 438. [2021-12-07 01:24:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 420 states have (on average 1.2809523809523808) internal successors, (538), 425 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:24:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 565 transitions. [2021-12-07 01:24:46,265 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 565 transitions. Word has length 101 [2021-12-07 01:24:46,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:46,265 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 565 transitions. [2021-12-07 01:24:46,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:46,266 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 565 transitions. [2021-12-07 01:24:46,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 01:24:46,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:46,267 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:46,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:24:46,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 01:24:46,469 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:46,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1817491628, now seen corresponding path program 1 times [2021-12-07 01:24:46,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:46,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476497261] [2021-12-07 01:24:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:46,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:46,567 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:46,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118779906] [2021-12-07 01:24:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:46,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:46,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:46,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:46,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:24:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:47,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:24:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:24:47,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:47,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:47,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476497261] [2021-12-07 01:24:47,180 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:47,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118779906] [2021-12-07 01:24:47,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118779906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:47,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:47,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:24:47,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68721173] [2021-12-07 01:24:47,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:47,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:24:47,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:47,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:24:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:47,182 INFO L87 Difference]: Start difference. First operand 438 states and 565 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:47,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:47,251 INFO L93 Difference]: Finished difference Result 1102 states and 1424 transitions. [2021-12-07 01:24:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:24:47,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-07 01:24:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:47,255 INFO L225 Difference]: With dead ends: 1102 [2021-12-07 01:24:47,255 INFO L226 Difference]: Without dead ends: 668 [2021-12-07 01:24:47,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:47,256 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 250 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:47,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1080 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:24:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-07 01:24:47,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 664. [2021-12-07 01:24:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2792511700468019) internal successors, (820), 646 states have internal predecessors, (820), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-07 01:24:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 857 transitions. [2021-12-07 01:24:47,274 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 857 transitions. Word has length 101 [2021-12-07 01:24:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:47,274 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 857 transitions. [2021-12-07 01:24:47,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:24:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 857 transitions. [2021-12-07 01:24:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-07 01:24:47,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:47,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:47,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:24:47,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:47,476 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash -193458954, now seen corresponding path program 1 times [2021-12-07 01:24:47,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:47,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015734375] [2021-12-07 01:24:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:47,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:47,515 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:47,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454822997] [2021-12-07 01:24:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:47,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:47,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:47,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:47,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:24:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:47,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 01:24:47,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:47,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:24:47,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:24:47,981 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:24:47,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:24:48,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:24:48,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:24:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:24:48,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:48,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:48,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015734375] [2021-12-07 01:24:48,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:48,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454822997] [2021-12-07 01:24:48,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454822997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:48,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:48,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:24:48,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119367805] [2021-12-07 01:24:48,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:48,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:24:48,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:48,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:24:48,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:24:48,146 INFO L87 Difference]: Start difference. First operand 664 states and 857 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:24:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:48,866 INFO L93 Difference]: Finished difference Result 1238 states and 1596 transitions. [2021-12-07 01:24:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:24:48,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2021-12-07 01:24:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:48,870 INFO L225 Difference]: With dead ends: 1238 [2021-12-07 01:24:48,870 INFO L226 Difference]: Without dead ends: 664 [2021-12-07 01:24:48,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:24:48,871 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 95 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:48,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1855 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 01:24:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-07 01:24:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2021-12-07 01:24:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2776911076443058) internal successors, (819), 646 states have internal predecessors, (819), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-07 01:24:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 856 transitions. [2021-12-07 01:24:48,887 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 856 transitions. Word has length 116 [2021-12-07 01:24:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:48,887 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 856 transitions. [2021-12-07 01:24:48,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:24:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 856 transitions. [2021-12-07 01:24:48,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-07 01:24:48,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:48,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:48,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:24:49,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:49,090 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:49,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1989763969, now seen corresponding path program 1 times [2021-12-07 01:24:49,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:49,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804072677] [2021-12-07 01:24:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:49,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:49,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:49,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343143985] [2021-12-07 01:24:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:49,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:49,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:49,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:49,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:24:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:49,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:24:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:24:49,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:49,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:49,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804072677] [2021-12-07 01:24:49,871 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:49,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343143985] [2021-12-07 01:24:49,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343143985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:49,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:49,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:24:49,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795353051] [2021-12-07 01:24:49,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:49,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:24:49,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:24:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:49,873 INFO L87 Difference]: Start difference. First operand 664 states and 856 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:24:49,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:49,921 INFO L93 Difference]: Finished difference Result 1352 states and 1753 transitions. [2021-12-07 01:24:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:24:49,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-07 01:24:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:49,926 INFO L225 Difference]: With dead ends: 1352 [2021-12-07 01:24:49,926 INFO L226 Difference]: Without dead ends: 706 [2021-12-07 01:24:49,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:49,928 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 9 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:49,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1047 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:24:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-12-07 01:24:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2021-12-07 01:24:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 681 states have (on average 1.261380323054332) internal successors, (859), 686 states have internal predecessors, (859), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-07 01:24:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 896 transitions. [2021-12-07 01:24:49,948 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 896 transitions. Word has length 163 [2021-12-07 01:24:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:49,948 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 896 transitions. [2021-12-07 01:24:49,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:24:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 896 transitions. [2021-12-07 01:24:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-07 01:24:49,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:49,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:49,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:24:50,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 01:24:50,152 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:50,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:50,154 INFO L85 PathProgramCache]: Analyzing trace with hash 58638335, now seen corresponding path program 1 times [2021-12-07 01:24:50,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:50,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039888844] [2021-12-07 01:24:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:50,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:50,253 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:50,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240052532] [2021-12-07 01:24:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:50,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:50,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:50,254 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:50,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:24:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 2222 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:24:50,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:50,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:24:50,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:50,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:50,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039888844] [2021-12-07 01:24:50,955 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:50,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240052532] [2021-12-07 01:24:50,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240052532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:50,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:50,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:24:50,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940529723] [2021-12-07 01:24:50,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:50,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:24:50,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:50,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:24:50,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:24:50,956 INFO L87 Difference]: Start difference. First operand 704 states and 896 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:24:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:51,001 INFO L93 Difference]: Finished difference Result 1346 states and 1718 transitions. [2021-12-07 01:24:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:24:51,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-07 01:24:51,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:51,004 INFO L225 Difference]: With dead ends: 1346 [2021-12-07 01:24:51,004 INFO L226 Difference]: Without dead ends: 678 [2021-12-07 01:24:51,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:24:51,006 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 492 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:51,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 1099 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:24:51,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-07 01:24:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 676. [2021-12-07 01:24:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 653 states have (on average 1.2511485451761102) internal successors, (817), 658 states have internal predecessors, (817), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-07 01:24:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 854 transitions. [2021-12-07 01:24:51,021 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 854 transitions. Word has length 163 [2021-12-07 01:24:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:51,021 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 854 transitions. [2021-12-07 01:24:51,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:24:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 854 transitions. [2021-12-07 01:24:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-07 01:24:51,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:51,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:51,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:24:51,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 01:24:51,225 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:51,227 INFO L85 PathProgramCache]: Analyzing trace with hash -93076467, now seen corresponding path program 1 times [2021-12-07 01:24:51,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:51,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871258444] [2021-12-07 01:24:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:51,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:51,335 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:51,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587126376] [2021-12-07 01:24:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:51,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:51,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:51,336 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:51,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:24:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:24:51,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:24:52,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:52,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:52,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871258444] [2021-12-07 01:24:52,147 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:52,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587126376] [2021-12-07 01:24:52,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587126376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:52,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:52,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:24:52,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120213491] [2021-12-07 01:24:52,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:52,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:24:52,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:52,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:24:52,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:52,148 INFO L87 Difference]: Start difference. First operand 676 states and 854 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:24:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:52,202 INFO L93 Difference]: Finished difference Result 1533 states and 1962 transitions. [2021-12-07 01:24:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:24:52,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-07 01:24:52,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:52,206 INFO L225 Difference]: With dead ends: 1533 [2021-12-07 01:24:52,207 INFO L226 Difference]: Without dead ends: 915 [2021-12-07 01:24:52,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:24:52,208 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 220 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:52,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1064 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:24:52,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-12-07 01:24:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 813. [2021-12-07 01:24:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 787 states have (on average 1.2617534942820838) internal successors, (993), 792 states have internal predecessors, (993), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-07 01:24:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1036 transitions. [2021-12-07 01:24:52,228 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1036 transitions. Word has length 163 [2021-12-07 01:24:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:52,228 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1036 transitions. [2021-12-07 01:24:52,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:24:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1036 transitions. [2021-12-07 01:24:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-07 01:24:52,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:52,230 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:52,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:24:52,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 01:24:52,432 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:52,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1089658224, now seen corresponding path program 1 times [2021-12-07 01:24:52,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:52,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523850008] [2021-12-07 01:24:52,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:52,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:52,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:52,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174670327] [2021-12-07 01:24:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:52,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:52,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:52,513 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:52,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:24:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:53,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:24:53,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:24:53,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:24:53,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523850008] [2021-12-07 01:24:53,251 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174670327] [2021-12-07 01:24:53,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174670327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:24:53,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:24:53,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:24:53,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275267875] [2021-12-07 01:24:53,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:53,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:24:53,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:53,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:24:53,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:24:53,252 INFO L87 Difference]: Start difference. First operand 813 states and 1036 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:24:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:53,739 INFO L93 Difference]: Finished difference Result 1342 states and 1716 transitions. [2021-12-07 01:24:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:24:53,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 178 [2021-12-07 01:24:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:53,743 INFO L225 Difference]: With dead ends: 1342 [2021-12-07 01:24:53,743 INFO L226 Difference]: Without dead ends: 665 [2021-12-07 01:24:53,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:24:53,744 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 835 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:53,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 644 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:24:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-07 01:24:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2021-12-07 01:24:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 644 states have (on average 1.2468944099378882) internal successors, (803), 649 states have internal predecessors, (803), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-07 01:24:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 836 transitions. [2021-12-07 01:24:53,760 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 836 transitions. Word has length 178 [2021-12-07 01:24:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:53,760 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 836 transitions. [2021-12-07 01:24:53,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:24:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 836 transitions. [2021-12-07 01:24:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-07 01:24:53,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:53,762 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:53,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 01:24:53,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 01:24:53,964 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:53,965 INFO L85 PathProgramCache]: Analyzing trace with hash -175615331, now seen corresponding path program 1 times [2021-12-07 01:24:53,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:53,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486061571] [2021-12-07 01:24:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:53,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:54,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:54,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831896773] [2021-12-07 01:24:54,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:54,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:54,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:54,044 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:54,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 01:24:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:24:54,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 01:24:54,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:24:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 01:24:55,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:24:55,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:24:55,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486061571] [2021-12-07 01:24:55,237 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:24:55,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831896773] [2021-12-07 01:24:55,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831896773] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 01:24:55,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:24:55,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-07 01:24:55,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704966206] [2021-12-07 01:24:55,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:24:55,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:24:55,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:55,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:24:55,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:24:55,239 INFO L87 Difference]: Start difference. First operand 665 states and 836 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:24:55,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:24:55,275 INFO L93 Difference]: Finished difference Result 1280 states and 1621 transitions. [2021-12-07 01:24:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:24:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 185 [2021-12-07 01:24:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:24:55,279 INFO L225 Difference]: With dead ends: 1280 [2021-12-07 01:24:55,279 INFO L226 Difference]: Without dead ends: 670 [2021-12-07 01:24:55,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:24:55,280 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 5 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:24:55,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1595 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:24:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-12-07 01:24:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2021-12-07 01:24:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 648 states have (on average 1.248456790123457) internal successors, (809), 653 states have internal predecessors, (809), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 01:24:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 845 transitions. [2021-12-07 01:24:55,298 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 845 transitions. Word has length 185 [2021-12-07 01:24:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:24:55,298 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 845 transitions. [2021-12-07 01:24:55,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:24:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 845 transitions. [2021-12-07 01:24:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-07 01:24:55,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:24:55,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:24:55,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 01:24:55,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:55,501 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:24:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:24:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1001726597, now seen corresponding path program 1 times [2021-12-07 01:24:55,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:24:55,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941230648] [2021-12-07 01:24:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:55,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:24:55,545 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:24:55,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962793734] [2021-12-07 01:24:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:24:55,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:24:55,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:24:55,556 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:24:55,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 01:25:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:26,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 01:25:26,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 01:25:26,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:25:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:25:26,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941230648] [2021-12-07 01:25:26,541 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:25:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962793734] [2021-12-07 01:25:26,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962793734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:25:26,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:25:26,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-07 01:25:26,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645595334] [2021-12-07 01:25:26,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:25:26,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:25:26,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:25:26,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:25:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:25:26,542 INFO L87 Difference]: Start difference. First operand 670 states and 845 transitions. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:25:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:26,672 INFO L93 Difference]: Finished difference Result 1301 states and 1660 transitions. [2021-12-07 01:25:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:25:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 187 [2021-12-07 01:25:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:26,676 INFO L225 Difference]: With dead ends: 1301 [2021-12-07 01:25:26,676 INFO L226 Difference]: Without dead ends: 679 [2021-12-07 01:25:26,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:25:26,677 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 16 mSDsluCounter, 2643 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:26,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 3178 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:25:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-12-07 01:25:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2021-12-07 01:25:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 655 states have (on average 1.250381679389313) internal successors, (819), 662 states have internal predecessors, (819), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (24), 13 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-07 01:25:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 860 transitions. [2021-12-07 01:25:26,693 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 860 transitions. Word has length 187 [2021-12-07 01:25:26,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:26,693 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 860 transitions. [2021-12-07 01:25:26,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:25:26,693 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 860 transitions. [2021-12-07 01:25:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-07 01:25:26,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:26,695 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:26,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 01:25:26,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 01:25:26,895 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:25:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1282630557, now seen corresponding path program 2 times [2021-12-07 01:25:26,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:26,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036005339] [2021-12-07 01:25:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:26,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:26,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:25:26,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471141913] [2021-12-07 01:25:26,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:25:26,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:26,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:26,952 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:26,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 01:26:25,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:26:25,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:26:25,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:26:26,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:26:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-07 01:26:26,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:26:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-07 01:26:26,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:26:26,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036005339] [2021-12-07 01:26:26,469 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:26:26,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471141913] [2021-12-07 01:26:26,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471141913] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:26:26,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:26:26,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-12-07 01:26:26,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925648954] [2021-12-07 01:26:26,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:26:26,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 01:26:26,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:26:26,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 01:26:26,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:26:26,472 INFO L87 Difference]: Start difference. First operand 679 states and 860 transitions. Second operand has 15 states, 15 states have (on average 12.466666666666667) internal successors, (187), 15 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:26:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:26:27,554 INFO L93 Difference]: Finished difference Result 1327 states and 1704 transitions. [2021-12-07 01:26:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:26:27,554 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 12.466666666666667) internal successors, (187), 15 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 193 [2021-12-07 01:26:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:26:27,557 INFO L225 Difference]: With dead ends: 1327 [2021-12-07 01:26:27,558 INFO L226 Difference]: Without dead ends: 696 [2021-12-07 01:26:27,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-12-07 01:26:27,559 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 80 mSDsluCounter, 4757 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 5293 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:26:27,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 5293 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:26:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-12-07 01:26:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 688. [2021-12-07 01:26:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 664 states have (on average 1.2575301204819278) internal successors, (835), 671 states have internal predecessors, (835), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (24), 13 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-07 01:26:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 876 transitions. [2021-12-07 01:26:27,577 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 876 transitions. Word has length 193 [2021-12-07 01:26:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:26:27,577 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 876 transitions. [2021-12-07 01:26:27,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.466666666666667) internal successors, (187), 15 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:26:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 876 transitions. [2021-12-07 01:26:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-07 01:26:27,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:26:27,579 INFO L514 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:26:27,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-07 01:26:27,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:26:27,780 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:26:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:26:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1561427229, now seen corresponding path program 3 times [2021-12-07 01:26:27,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:26:27,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030954305] [2021-12-07 01:26:27,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:26:27,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:26:27,832 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:26:27,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750031760] [2021-12-07 01:26:27,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:26:27,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:26:27,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:26:27,833 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:26:27,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed8c3da-ff78-4676-be6b-4a96e4552deb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process