./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d288c71d1b2e69759b6f9526e6975c86927bb09c8445c07388947e8f3491289 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:09:55,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:09:55,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:09:55,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:09:55,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:09:55,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:09:55,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:09:55,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:09:55,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:09:55,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:09:55,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:09:55,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:09:55,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:09:55,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:09:55,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:09:55,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:09:55,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:09:55,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:09:55,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:09:55,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:09:55,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:09:55,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:09:55,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:09:55,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:09:55,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:09:55,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:09:55,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:09:55,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:09:55,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:09:55,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:09:55,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:09:55,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:09:55,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:09:55,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:09:55,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:09:55,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:09:55,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:09:55,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:09:55,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:09:55,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:09:55,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:09:55,979 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:09:56,027 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:09:56,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:09:56,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:09:56,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:09:56,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:09:56,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:09:56,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:09:56,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:09:56,037 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:09:56,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:09:56,038 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:09:56,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:09:56,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:09:56,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:09:56,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:09:56,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:09:56,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:09:56,040 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:09:56,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:09:56,040 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:09:56,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:09:56,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:09:56,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:09:56,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:09:56,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:09:56,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:09:56,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:09:56,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:09:56,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:09:56,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:09:56,044 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:09:56,044 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:09:56,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:09:56,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:09:56,045 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_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d288c71d1b2e69759b6f9526e6975c86927bb09c8445c07388947e8f3491289 [2021-11-20 07:09:56,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:09:56,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:09:56,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:09:56,359 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:09:56,359 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:09:56,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-11-20 07:09:56,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/data/09ffdcf17/cb4f4d525bec4677b719a4d2fdc32e27/FLAGe8f69aa02 [2021-11-20 07:09:56,883 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:09:56,884 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-11-20 07:09:56,891 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/data/09ffdcf17/cb4f4d525bec4677b719a4d2fdc32e27/FLAGe8f69aa02 [2021-11-20 07:09:57,271 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/data/09ffdcf17/cb4f4d525bec4677b719a4d2fdc32e27 [2021-11-20 07:09:57,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:09:57,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:09:57,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:09:57,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:09:57,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:09:57,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@83c28b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57, skipping insertion in model container [2021-11-20 07:09:57,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:09:57,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:09:57,498 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_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2021-11-20 07:09:57,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:09:57,526 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:09:57,538 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_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2021-11-20 07:09:57,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:09:57,568 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:09:57,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57 WrapperNode [2021-11-20 07:09:57,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:09:57,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:09:57,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:09:57,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:09:57,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,617 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2021-11-20 07:09:57,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:09:57,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:09:57,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:09:57,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:09:57,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:09:57,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:09:57,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:09:57,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:09:57,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57" (1/1) ... [2021-11-20 07:09:57,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:09:57,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:57,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:09:57,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:09:57,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:09:57,755 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:09:57,756 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:09:57,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:09:57,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:09:57,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:09:57,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 07:09:57,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 07:09:57,829 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:09:57,831 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:09:58,052 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:09:58,057 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:09:58,058 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 07:09:58,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:09:58 BoogieIcfgContainer [2021-11-20 07:09:58,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:09:58,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:09:58,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:09:58,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:09:58,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:09:57" (1/3) ... [2021-11-20 07:09:58,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f77151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:09:58, skipping insertion in model container [2021-11-20 07:09:58,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:09:57" (2/3) ... [2021-11-20 07:09:58,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f77151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:09:58, skipping insertion in model container [2021-11-20 07:09:58,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:09:58" (3/3) ... [2021-11-20 07:09:58,068 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2021-11-20 07:09:58,073 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:09:58,073 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:09:58,138 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:09:58,146 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:09:58,146 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:09:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:09:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:09:58,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:58,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:58,170 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:58,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2021-11-20 07:09:58,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:58,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846831028] [2021-11-20 07:09:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:58,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:58,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:09:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:58,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:09:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:09:58,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846831028] [2021-11-20 07:09:58,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846831028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:09:58,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:09:58,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:09:58,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301602500] [2021-11-20 07:09:58,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:09:58,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:09:58,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:58,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:09:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:09:58,386 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:09:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:58,409 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2021-11-20 07:09:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:09:58,411 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-20 07:09:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:58,419 INFO L225 Difference]: With dead ends: 67 [2021-11-20 07:09:58,419 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 07:09:58,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:09:58,427 INFO L933 BasicCegarLoop]: 45 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, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:58,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:09:58,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 07:09:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 07:09:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:09:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-11-20 07:09:58,468 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2021-11-20 07:09:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:58,469 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-11-20 07:09:58,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:09:58,470 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-11-20 07:09:58,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 07:09:58,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:58,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:58,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:09:58,482 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:58,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:58,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2021-11-20 07:09:58,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:58,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841437262] [2021-11-20 07:09:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:58,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:58,515 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:09:58,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472952242] [2021-11-20 07:09:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:58,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:58,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:58,527 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:58,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:09:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:58,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:09:58,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:09:58,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:09:58,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:58,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841437262] [2021-11-20 07:09:58,706 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:09:58,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472952242] [2021-11-20 07:09:58,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472952242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:09:58,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:09:58,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:09:58,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708460665] [2021-11-20 07:09:58,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:09:58,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:09:58,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:09:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:09:58,710 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:09:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:58,733 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-11-20 07:09:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:09:58,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-20 07:09:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:58,735 INFO L225 Difference]: With dead ends: 40 [2021-11-20 07:09:58,736 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 07:09:58,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:09:58,738 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:58,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:09:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 07:09:58,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-20 07:09:58,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:09:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-11-20 07:09:58,748 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-11-20 07:09:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:58,749 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-11-20 07:09:58,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:09:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-11-20 07:09:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 07:09:58,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:58,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:58,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:58,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:58,978 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:58,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:58,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2021-11-20 07:09:58,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:58,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373176262] [2021-11-20 07:09:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:58,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:58,994 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:09:58,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334647985] [2021-11-20 07:09:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:59,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:59,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:59,006 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:59,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:09:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:59,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:09:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:09:59,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:09:59,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:59,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373176262] [2021-11-20 07:09:59,221 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:09:59,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334647985] [2021-11-20 07:09:59,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334647985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:09:59,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:09:59,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:09:59,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202456518] [2021-11-20 07:09:59,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:09:59,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:09:59,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:59,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:09:59,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:09:59,224 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:09:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:59,350 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-11-20 07:09:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:09:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-20 07:09:59,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:59,353 INFO L225 Difference]: With dead ends: 53 [2021-11-20 07:09:59,360 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 07:09:59,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:09:59,363 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:59,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 149 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:09:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 07:09:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-11-20 07:09:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:09:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-11-20 07:09:59,381 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2021-11-20 07:09:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:59,381 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-11-20 07:09:59,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:09:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-11-20 07:09:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:09:59,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:59,389 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] [2021-11-20 07:09:59,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:59,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 07:09:59,590 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:59,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2021-11-20 07:09:59,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:59,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744207133] [2021-11-20 07:09:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:59,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:59,616 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:09:59,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167701851] [2021-11-20 07:09:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:59,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:59,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:59,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:59,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:09:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:59,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:09:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:09:59,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:09:59,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:59,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744207133] [2021-11-20 07:09:59,806 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:09:59,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167701851] [2021-11-20 07:09:59,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167701851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:09:59,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:09:59,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:09:59,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432369229] [2021-11-20 07:09:59,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:09:59,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:09:59,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:09:59,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:09:59,811 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:09:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:59,860 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2021-11-20 07:09:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:09:59,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-20 07:09:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:59,862 INFO L225 Difference]: With dead ends: 58 [2021-11-20 07:09:59,865 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 07:09:59,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:09:59,868 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:59,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:09:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 07:09:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-20 07:09:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:09:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-11-20 07:09:59,874 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2021-11-20 07:09:59,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:59,875 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-11-20 07:09:59,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:09:59,875 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-11-20 07:09:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:09:59,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:59,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:59,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:00,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:00,099 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:00,100 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2021-11-20 07:10:00,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:00,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635293845] [2021-11-20 07:10:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:00,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:00,116 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:00,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691963140] [2021-11-20 07:10:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:00,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:00,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:00,118 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:00,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:10:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:00,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 07:10:00,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:10:00,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:10:00,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:00,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635293845] [2021-11-20 07:10:00,517 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:00,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691963140] [2021-11-20 07:10:00,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691963140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:10:00,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:10:00,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:10:00,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135805431] [2021-11-20 07:10:00,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:00,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:10:00,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:00,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:10:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:10:00,525 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:10:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:00,645 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-11-20 07:10:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:10:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-20 07:10:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:00,648 INFO L225 Difference]: With dead ends: 54 [2021-11-20 07:10:00,648 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 07:10:00,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:10:00,650 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:00,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:10:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 07:10:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-20 07:10:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 07:10:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-11-20 07:10:00,663 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2021-11-20 07:10:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:00,664 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-11-20 07:10:00,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:10:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-11-20 07:10:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:10:00,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:00,665 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] [2021-11-20 07:10:00,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:00,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:00,888 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2021-11-20 07:10:00,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:00,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428626077] [2021-11-20 07:10:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:00,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:00,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:00,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821282775] [2021-11-20 07:10:00,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:00,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:00,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:00,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:00,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:10:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:00,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:10:00,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:10:01,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:10:01,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428626077] [2021-11-20 07:10:01,189 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:01,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821282775] [2021-11-20 07:10:01,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821282775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:01,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:01,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-11-20 07:10:01,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941660199] [2021-11-20 07:10:01,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:01,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:10:01,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:10:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:10:01,192 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:10:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:01,319 INFO L93 Difference]: Finished difference Result 112 states and 144 transitions. [2021-11-20 07:10:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:10:01,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2021-11-20 07:10:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:01,329 INFO L225 Difference]: With dead ends: 112 [2021-11-20 07:10:01,329 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 07:10:01,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:10:01,333 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 52 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:01,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 187 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:10:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 07:10:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2021-11-20 07:10:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 71 states have internal predecessors, (90), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 07:10:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 128 transitions. [2021-11-20 07:10:01,377 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 128 transitions. Word has length 26 [2021-11-20 07:10:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:01,378 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 128 transitions. [2021-11-20 07:10:01,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:10:01,378 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 128 transitions. [2021-11-20 07:10:01,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 07:10:01,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:01,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:01,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:01,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:10:01,601 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:01,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:01,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2021-11-20 07:10:01,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:01,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035238326] [2021-11-20 07:10:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:01,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:01,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:01,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426528784] [2021-11-20 07:10:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:01,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:01,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:01,631 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:01,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:10:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:01,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:10:01,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:10:01,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:10:01,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:01,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035238326] [2021-11-20 07:10:01,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:01,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426528784] [2021-11-20 07:10:01,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426528784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:01,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:01,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-20 07:10:01,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694849757] [2021-11-20 07:10:01,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:01,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:10:01,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:01,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:10:01,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:10:01,911 INFO L87 Difference]: Start difference. First operand 96 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:10:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:02,104 INFO L93 Difference]: Finished difference Result 182 states and 259 transitions. [2021-11-20 07:10:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:10:02,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-20 07:10:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:02,117 INFO L225 Difference]: With dead ends: 182 [2021-11-20 07:10:02,117 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 07:10:02,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:10:02,118 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 117 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:02,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 274 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:10:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 07:10:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2021-11-20 07:10:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 96 states have (on average 1.34375) internal successors, (129), 98 states have internal predecessors, (129), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 07:10:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2021-11-20 07:10:02,145 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 27 [2021-11-20 07:10:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:02,146 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2021-11-20 07:10:02,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:10:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2021-11-20 07:10:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:10:02,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:02,148 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] [2021-11-20 07:10:02,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 07:10:02,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:02,361 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:02,362 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2021-11-20 07:10:02,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:02,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943276905] [2021-11-20 07:10:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:02,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:02,373 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:02,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036147483] [2021-11-20 07:10:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:02,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:02,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:02,374 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:02,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:10:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:02,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:10:02,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:10:02,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:10:02,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:02,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943276905] [2021-11-20 07:10:02,751 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:02,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036147483] [2021-11-20 07:10:02,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036147483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:10:02,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:10:02,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 07:10:02,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786000527] [2021-11-20 07:10:02,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:02,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:10:02,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:10:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:10:02,754 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:10:02,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:02,991 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2021-11-20 07:10:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:10:02,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-20 07:10:02,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:02,994 INFO L225 Difference]: With dead ends: 152 [2021-11-20 07:10:02,994 INFO L226 Difference]: Without dead ends: 150 [2021-11-20 07:10:02,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:10:02,996 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 76 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:02,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 257 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:10:02,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-20 07:10:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2021-11-20 07:10:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 105 states have (on average 1.3142857142857143) internal successors, (138), 107 states have internal predecessors, (138), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 07:10:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 183 transitions. [2021-11-20 07:10:03,017 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 183 transitions. Word has length 30 [2021-11-20 07:10:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:03,017 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 183 transitions. [2021-11-20 07:10:03,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:10:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 183 transitions. [2021-11-20 07:10:03,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 07:10:03,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:03,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:03,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:03,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:03,233 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:03,234 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2021-11-20 07:10:03,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:03,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130269971] [2021-11-20 07:10:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:03,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:03,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:03,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48284917] [2021-11-20 07:10:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:03,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:03,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:03,258 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:03,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:10:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:03,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 07:10:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:10:03,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:10:03,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:03,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130269971] [2021-11-20 07:10:03,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:03,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48284917] [2021-11-20 07:10:03,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48284917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:03,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:03,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2021-11-20 07:10:03,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573217177] [2021-11-20 07:10:03,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:03,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:10:03,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:10:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:10:03,772 INFO L87 Difference]: Start difference. First operand 139 states and 183 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:10:03,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:03,992 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2021-11-20 07:10:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:10:03,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-11-20 07:10:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:03,995 INFO L225 Difference]: With dead ends: 174 [2021-11-20 07:10:03,995 INFO L226 Difference]: Without dead ends: 172 [2021-11-20 07:10:03,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:10:03,998 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 68 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:03,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 403 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:10:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-20 07:10:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2021-11-20 07:10:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3412698412698412) internal successors, (169), 128 states have internal predecessors, (169), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 07:10:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2021-11-20 07:10:04,034 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 32 [2021-11-20 07:10:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:04,035 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2021-11-20 07:10:04,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:10:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2021-11-20 07:10:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 07:10:04,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:04,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:04,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:04,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:04,264 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:04,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2021-11-20 07:10:04,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:04,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717637473] [2021-11-20 07:10:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:04,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:04,275 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:04,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4171536] [2021-11-20 07:10:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:04,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:04,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:04,277 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:04,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:10:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:04,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:10:04,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:10:04,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:10:04,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:04,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717637473] [2021-11-20 07:10:04,419 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:04,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4171536] [2021-11-20 07:10:04,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4171536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:10:04,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:10:04,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:10:04,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042755841] [2021-11-20 07:10:04,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:04,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:10:04,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:04,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:10:04,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:10:04,421 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:10:04,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:04,459 INFO L93 Difference]: Finished difference Result 236 states and 323 transitions. [2021-11-20 07:10:04,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:10:04,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-11-20 07:10:04,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:04,462 INFO L225 Difference]: With dead ends: 236 [2021-11-20 07:10:04,462 INFO L226 Difference]: Without dead ends: 169 [2021-11-20 07:10:04,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:10:04,464 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:04,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:10:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-20 07:10:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-11-20 07:10:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3333333333333333) internal successors, (168), 128 states have internal predecessors, (168), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 07:10:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 229 transitions. [2021-11-20 07:10:04,485 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 229 transitions. Word has length 32 [2021-11-20 07:10:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:04,485 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 229 transitions. [2021-11-20 07:10:04,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:10:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 229 transitions. [2021-11-20 07:10:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 07:10:04,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:04,487 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 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] [2021-11-20 07:10:04,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-20 07:10:04,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:10:04,713 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:04,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2021-11-20 07:10:04,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:04,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518614256] [2021-11-20 07:10:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:04,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:04,723 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:04,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185221293] [2021-11-20 07:10:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:04,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:04,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:04,728 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:04,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:10:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:04,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:10:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:10:04,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:10:04,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:04,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518614256] [2021-11-20 07:10:04,919 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:04,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185221293] [2021-11-20 07:10:04,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185221293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:10:04,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:10:04,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:10:04,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620660786] [2021-11-20 07:10:04,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:04,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:10:04,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:04,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:10:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:10:04,922 INFO L87 Difference]: Start difference. First operand 169 states and 229 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:10:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:04,990 INFO L93 Difference]: Finished difference Result 234 states and 329 transitions. [2021-11-20 07:10:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:10:04,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-20 07:10:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:04,994 INFO L225 Difference]: With dead ends: 234 [2021-11-20 07:10:04,994 INFO L226 Difference]: Without dead ends: 232 [2021-11-20 07:10:04,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:10:04,996 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:04,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:10:04,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-20 07:10:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2021-11-20 07:10:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 159 states have (on average 1.3647798742138364) internal successors, (217), 161 states have internal predecessors, (217), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 07:10:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 318 transitions. [2021-11-20 07:10:05,034 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 318 transitions. Word has length 35 [2021-11-20 07:10:05,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:05,034 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 318 transitions. [2021-11-20 07:10:05,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:10:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 318 transitions. [2021-11-20 07:10:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:10:05,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:05,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:05,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:05,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:05,261 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2021-11-20 07:10:05,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:05,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033251550] [2021-11-20 07:10:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:05,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:05,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:05,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596455521] [2021-11-20 07:10:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:05,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:05,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:05,271 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:05,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:10:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:05,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 07:10:05,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:10:05,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:05,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033251550] [2021-11-20 07:10:05,654 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596455521] [2021-11-20 07:10:05,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596455521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:10:05,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:10:05,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-20 07:10:05,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679526722] [2021-11-20 07:10:05,655 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:05,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:10:05,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:05,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:10:05,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:10:05,658 INFO L87 Difference]: Start difference. First operand 225 states and 318 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:10:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:05,808 INFO L93 Difference]: Finished difference Result 237 states and 328 transitions. [2021-11-20 07:10:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:10:05,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-11-20 07:10:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:05,811 INFO L225 Difference]: With dead ends: 237 [2021-11-20 07:10:05,811 INFO L226 Difference]: Without dead ends: 235 [2021-11-20 07:10:05,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:10:05,813 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 38 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:05,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 271 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:10:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-20 07:10:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2021-11-20 07:10:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 165 states have (on average 1.3515151515151516) internal successors, (223), 167 states have internal predecessors, (223), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 07:10:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 324 transitions. [2021-11-20 07:10:05,849 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 324 transitions. Word has length 37 [2021-11-20 07:10:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:05,849 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 324 transitions. [2021-11-20 07:10:05,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:10:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 324 transitions. [2021-11-20 07:10:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 07:10:05,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:05,851 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2021-11-20 07:10:05,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:06,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:10:06,069 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:06,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:06,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2021-11-20 07:10:06,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:06,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026234832] [2021-11-20 07:10:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:06,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:06,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:06,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916979918] [2021-11-20 07:10:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:06,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:06,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:06,081 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:06,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:10:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:10:06,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:10:06,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:10:06,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:06,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026234832] [2021-11-20 07:10:06,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:06,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916979918] [2021-11-20 07:10:06,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916979918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:10:06,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:10:06,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:10:06,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428968350] [2021-11-20 07:10:06,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:06,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:10:06,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:10:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:10:06,233 INFO L87 Difference]: Start difference. First operand 233 states and 324 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:10:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:06,304 INFO L93 Difference]: Finished difference Result 325 states and 479 transitions. [2021-11-20 07:10:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:10:06,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-11-20 07:10:06,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:06,307 INFO L225 Difference]: With dead ends: 325 [2021-11-20 07:10:06,308 INFO L226 Difference]: Without dead ends: 323 [2021-11-20 07:10:06,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:10:06,309 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:06,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:10:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-20 07:10:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 291. [2021-11-20 07:10:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 186 states have (on average 1.3548387096774193) internal successors, (252), 197 states have internal predecessors, (252), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 76 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 07:10:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 425 transitions. [2021-11-20 07:10:06,351 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 425 transitions. Word has length 40 [2021-11-20 07:10:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:06,351 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 425 transitions. [2021-11-20 07:10:06,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:10:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 425 transitions. [2021-11-20 07:10:06,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:10:06,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:06,353 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:06,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:06,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:10:06,577 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:06,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2021-11-20 07:10:06,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:06,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062083399] [2021-11-20 07:10:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:06,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:06,585 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:06,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856539181] [2021-11-20 07:10:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:06,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:06,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:06,594 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:06,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:10:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:06,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:10:06,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:10:06,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:10:06,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:06,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062083399] [2021-11-20 07:10:06,867 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:06,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856539181] [2021-11-20 07:10:06,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856539181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:06,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:06,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-11-20 07:10:06,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600131347] [2021-11-20 07:10:06,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:06,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:10:06,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:06,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:10:06,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:10:06,870 INFO L87 Difference]: Start difference. First operand 291 states and 425 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:10:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:06,999 INFO L93 Difference]: Finished difference Result 449 states and 670 transitions. [2021-11-20 07:10:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:10:07,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2021-11-20 07:10:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:07,004 INFO L225 Difference]: With dead ends: 449 [2021-11-20 07:10:07,004 INFO L226 Difference]: Without dead ends: 299 [2021-11-20 07:10:07,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:10:07,009 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 50 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:07,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 241 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:10:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-20 07:10:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 295. [2021-11-20 07:10:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 190 states have (on average 1.3421052631578947) internal successors, (255), 200 states have internal predecessors, (255), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 07:10:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 428 transitions. [2021-11-20 07:10:07,055 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 428 transitions. Word has length 38 [2021-11-20 07:10:07,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:07,056 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 428 transitions. [2021-11-20 07:10:07,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:10:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 428 transitions. [2021-11-20 07:10:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:10:07,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:07,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:07,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:07,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:10:07,273 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1731348364, now seen corresponding path program 1 times [2021-11-20 07:10:07,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:07,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415706489] [2021-11-20 07:10:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:07,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:07,282 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:07,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683151507] [2021-11-20 07:10:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:07,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:07,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:07,284 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:07,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:10:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:07,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:10:07,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:10:07,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:10:07,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:07,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415706489] [2021-11-20 07:10:07,549 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:07,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683151507] [2021-11-20 07:10:07,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683151507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:07,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:07,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-11-20 07:10:07,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010747546] [2021-11-20 07:10:07,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:07,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:10:07,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:07,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:10:07,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:10:07,551 INFO L87 Difference]: Start difference. First operand 295 states and 428 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:10:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:07,673 INFO L93 Difference]: Finished difference Result 494 states and 737 transitions. [2021-11-20 07:10:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:10:07,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-11-20 07:10:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:07,676 INFO L225 Difference]: With dead ends: 494 [2021-11-20 07:10:07,677 INFO L226 Difference]: Without dead ends: 301 [2021-11-20 07:10:07,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:10:07,681 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 58 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:07,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 180 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:10:07,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-20 07:10:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2021-11-20 07:10:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 194 states have (on average 1.324742268041237) internal successors, (257), 204 states have internal predecessors, (257), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 07:10:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 430 transitions. [2021-11-20 07:10:07,718 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 430 transitions. Word has length 38 [2021-11-20 07:10:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:07,718 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 430 transitions. [2021-11-20 07:10:07,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:10:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 430 transitions. [2021-11-20 07:10:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:10:07,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:07,719 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:07,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:07,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:10:07,940 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:07,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1564131624, now seen corresponding path program 2 times [2021-11-20 07:10:07,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:07,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061610624] [2021-11-20 07:10:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:07,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:07,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:07,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983042914] [2021-11-20 07:10:07,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:10:07,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:07,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:07,948 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:07,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:10:08,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:10:08,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:10:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:10:08,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:10:08,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:10:08,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:08,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061610624] [2021-11-20 07:10:08,099 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:08,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983042914] [2021-11-20 07:10:08,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983042914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:10:08,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:10:08,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:10:08,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525484163] [2021-11-20 07:10:08,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:08,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:10:08,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:08,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:10:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:10:08,102 INFO L87 Difference]: Start difference. First operand 299 states and 430 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:10:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:08,202 INFO L93 Difference]: Finished difference Result 532 states and 809 transitions. [2021-11-20 07:10:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:10:08,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2021-11-20 07:10:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:08,206 INFO L225 Difference]: With dead ends: 532 [2021-11-20 07:10:08,206 INFO L226 Difference]: Without dead ends: 426 [2021-11-20 07:10:08,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:10:08,208 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 29 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:08,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 182 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:10:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-20 07:10:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 323. [2021-11-20 07:10:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 218 states have (on average 1.334862385321101) internal successors, (291), 228 states have internal predecessors, (291), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 07:10:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 464 transitions. [2021-11-20 07:10:08,249 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 464 transitions. Word has length 39 [2021-11-20 07:10:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:08,249 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 464 transitions. [2021-11-20 07:10:08,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:10:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 464 transitions. [2021-11-20 07:10:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 07:10:08,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:08,251 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 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] [2021-11-20 07:10:08,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:08,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:10:08,465 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:08,466 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2021-11-20 07:10:08,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:08,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693218317] [2021-11-20 07:10:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:08,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:08,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:08,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132912971] [2021-11-20 07:10:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:08,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:08,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:08,476 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:08,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:10:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:08,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 07:10:08,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:10:09,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:10:10,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:10,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693218317] [2021-11-20 07:10:10,587 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:10,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132912971] [2021-11-20 07:10:10,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132912971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:10,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:10,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-11-20 07:10:10,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243098544] [2021-11-20 07:10:10,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:10,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:10:10,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:10:10,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:10:10,590 INFO L87 Difference]: Start difference. First operand 323 states and 464 transitions. Second operand has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 07:10:16,808 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:10:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:21,893 INFO L93 Difference]: Finished difference Result 525 states and 781 transitions. [2021-11-20 07:10:21,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 07:10:21,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 54 [2021-11-20 07:10:21,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:21,898 INFO L225 Difference]: With dead ends: 525 [2021-11-20 07:10:21,899 INFO L226 Difference]: Without dead ends: 521 [2021-11-20 07:10:21,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 07:10:21,901 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 174 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 251 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:21,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 690 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2021-11-20 07:10:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-20 07:10:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 429. [2021-11-20 07:10:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 298 states have (on average 1.3590604026845639) internal successors, (405), 306 states have internal predecessors, (405), 111 states have call successors, (111), 19 states have call predecessors, (111), 19 states have return successors, (110), 103 states have call predecessors, (110), 110 states have call successors, (110) [2021-11-20 07:10:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 626 transitions. [2021-11-20 07:10:21,983 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 626 transitions. Word has length 54 [2021-11-20 07:10:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:21,983 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 626 transitions. [2021-11-20 07:10:21,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 07:10:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 626 transitions. [2021-11-20 07:10:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 07:10:21,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:21,985 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 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] [2021-11-20 07:10:22,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:22,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:22,213 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:22,214 INFO L85 PathProgramCache]: Analyzing trace with hash 334196468, now seen corresponding path program 1 times [2021-11-20 07:10:22,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:22,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187901764] [2021-11-20 07:10:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:22,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:22,221 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:22,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824458475] [2021-11-20 07:10:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:22,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:22,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:22,235 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:22,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:10:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:10:22,281 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:10:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:10:22,332 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 07:10:22,332 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 07:10:22,333 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 07:10:22,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:22,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:10:22,564 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:22,566 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 07:10:22,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:10:22 BoogieIcfgContainer [2021-11-20 07:10:22,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 07:10:22,629 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:10:22,629 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:10:22,629 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:10:22,630 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:09:58" (3/4) ... [2021-11-20 07:10:22,631 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 07:10:22,699 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 07:10:22,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:10:22,700 INFO L158 Benchmark]: Toolchain (without parser) took 25425.44ms. Allocated memory was 119.5MB in the beginning and 174.1MB in the end (delta: 54.5MB). Free memory was 80.9MB in the beginning and 50.8MB in the end (delta: 30.1MB). Peak memory consumption was 84.4MB. Max. memory is 16.1GB. [2021-11-20 07:10:22,700 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 119.5MB. Free memory is still 98.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:10:22,701 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.71ms. Allocated memory is still 119.5MB. Free memory was 80.8MB in the beginning and 93.9MB in the end (delta: -13.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 07:10:22,701 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.37ms. Allocated memory is still 119.5MB. Free memory was 93.9MB in the beginning and 92.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:10:22,702 INFO L158 Benchmark]: Boogie Preprocessor took 42.10ms. Allocated memory is still 119.5MB. Free memory was 92.3MB in the beginning and 90.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:10:22,702 INFO L158 Benchmark]: RCFGBuilder took 399.00ms. Allocated memory is still 119.5MB. Free memory was 90.8MB in the beginning and 80.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 07:10:22,703 INFO L158 Benchmark]: TraceAbstraction took 24555.40ms. Allocated memory was 119.5MB in the beginning and 174.1MB in the end (delta: 54.5MB). Free memory was 79.8MB in the beginning and 55.0MB in the end (delta: 24.7MB). Peak memory consumption was 80.8MB. Max. memory is 16.1GB. [2021-11-20 07:10:22,703 INFO L158 Benchmark]: Witness Printer took 70.68ms. Allocated memory is still 174.1MB. Free memory was 55.0MB in the beginning and 50.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 07:10:22,705 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 119.5MB. Free memory is still 98.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 281.71ms. Allocated memory is still 119.5MB. Free memory was 80.8MB in the beginning and 93.9MB in the end (delta: -13.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.37ms. Allocated memory is still 119.5MB. Free memory was 93.9MB in the beginning and 92.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.10ms. Allocated memory is still 119.5MB. Free memory was 92.3MB in the beginning and 90.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 399.00ms. Allocated memory is still 119.5MB. Free memory was 90.8MB in the beginning and 80.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 24555.40ms. Allocated memory was 119.5MB in the beginning and 174.1MB in the end (delta: 54.5MB). Free memory was 79.8MB in the beginning and 55.0MB in the end (delta: 24.7MB). Peak memory consumption was 80.8MB. Max. memory is 16.1GB. * Witness Printer took 70.68ms. Allocated memory is still 174.1MB. Free memory was 55.0MB in the beginning and 50.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=2, b=3, counter=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] EXPR counter++ VAL [a=2, b=3, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] EXPR counter++ VAL [a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] EXPR counter++ VAL [a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] EXPR counter++ VAL [a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=3, b=2, c=3, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] EXPR counter++ VAL [a=3, b=2, c=3, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L54] COND TRUE !(c >= 2 * v) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L59] c = c - v [L60] k = k + d VAL [a=3, b=2, c=1, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] EXPR counter++ VAL [a=3, b=2, c=1, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=2, b=1, c=1, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] EXPR counter++ VAL [a=2, b=1, c=1, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, counter=7] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=7] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 24.4s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 13.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 870 SdHoareTripleChecker+Valid, 10.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 809 mSDsluCounter, 3716 SdHoareTripleChecker+Invalid, 10.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2938 mSDsCounter, 454 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2299 IncrementalHoareTripleChecker+Invalid, 2754 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 454 mSolverCounterUnsat, 778 mSDtfsCounter, 2299 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 774 GetRequests, 616 SyntacticMatches, 8 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=429occurred in iteration=17, InterpolantAutomatonStates: 146, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 321 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 594 NumberOfCodeBlocks, 594 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 727 ConstructedInterpolants, 0 QuantifiedInterpolants, 3467 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1929 ConjunctsInSsa, 215 ConjunctsInUnsatCore, 23 InterpolantComputations, 10 PerfectInterpolantSequences, 240/336 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 07:10:22,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b34fe73-5d5e-4e10-bfa9-70fdc844ce58/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE