./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i --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_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/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_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/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_b886a11f-6700-4e59-b009-23c8f68e1138/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 a74358cfc3b57ddf641c2843362a5594690e287c76148ee1838c9104dbe09de1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:41:59,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:41:59,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:41:59,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:41:59,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:41:59,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:41:59,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:41:59,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:41:59,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:41:59,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:41:59,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:41:59,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:41:59,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:41:59,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:41:59,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:41:59,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:41:59,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:41:59,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:41:59,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:41:59,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:41:59,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:41:59,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:41:59,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:41:59,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:41:59,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:41:59,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:41:59,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:41:59,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:41:59,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:41:59,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:41:59,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:41:59,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:41:59,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:41:59,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:41:59,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:41:59,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:41:59,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:41:59,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:41:59,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:41:59,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:41:59,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:41:59,530 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:41:59,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:41:59,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:41:59,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:41:59,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:41:59,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:41:59,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:41:59,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:41:59,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:41:59,579 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:41:59,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:41:59,581 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:41:59,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:41:59,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:41:59,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:41:59,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:41:59,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:41:59,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:41:59,583 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:41:59,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:41:59,583 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:41:59,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:41:59,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:41:59,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:41:59,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:41:59,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:41:59,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:41:59,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:41:59,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:41:59,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:41:59,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:41:59,587 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:41:59,588 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:41:59,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:41:59,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:41:59,588 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_b886a11f-6700-4e59-b009-23c8f68e1138/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a74358cfc3b57ddf641c2843362a5594690e287c76148ee1838c9104dbe09de1 [2021-11-20 06:41:59,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:41:59,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:41:59,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:41:59,923 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:41:59,923 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:41:59,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i [2021-11-20 06:42:00,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/data/d4b35a27e/0a3c7f0404dc455cabb13aee4f62e073/FLAG49144bb7e [2021-11-20 06:42:00,599 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:42:00,600 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i [2021-11-20 06:42:00,623 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/data/d4b35a27e/0a3c7f0404dc455cabb13aee4f62e073/FLAG49144bb7e [2021-11-20 06:42:00,852 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/data/d4b35a27e/0a3c7f0404dc455cabb13aee4f62e073 [2021-11-20 06:42:00,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:42:00,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:42:00,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:00,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:42:00,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:42:00,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:00" (1/1) ... [2021-11-20 06:42:00,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:00, skipping insertion in model container [2021-11-20 06:42:00,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:00" (1/1) ... [2021-11-20 06:42:00,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:42:00,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:42:01,335 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_b886a11f-6700-4e59-b009-23c8f68e1138/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i[33021,33034] [2021-11-20 06:42:01,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:01,456 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:42:01,489 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_b886a11f-6700-4e59-b009-23c8f68e1138/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-1.i[33021,33034] [2021-11-20 06:42:01,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:01,573 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:42:01,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01 WrapperNode [2021-11-20 06:42:01,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:01,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:42:01,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:42:01,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:42:01,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01" (1/1) ... [2021-11-20 06:42:01,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01" (1/1) ... [2021-11-20 06:42:01,700 INFO L137 Inliner]: procedures = 177, calls = 186, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 621 [2021-11-20 06:42:01,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:42:01,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:42:01,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:42:01,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:42:01,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01" (1/1) ... [2021-11-20 06:42:01,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01" (1/1) ... [2021-11-20 06:42:01,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01" (1/1) ... [2021-11-20 06:42:01,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01" (1/1) ... [2021-11-20 06:42:01,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01" (1/1) ... [2021-11-20 06:42:01,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01" (1/1) ... [2021-11-20 06:42:01,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01" (1/1) ... [2021-11-20 06:42:01,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:42:01,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:42:01,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:42:01,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:42:01,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01" (1/1) ... [2021-11-20 06:42:01,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:42:01,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:01,843 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:42:01,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:42:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:42:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:42:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:42:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:42:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 06:42:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 06:42:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:42:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:42:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:42:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:42:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:42:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:42:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:42:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:42:01,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:42:02,085 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:42:02,087 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:42:02,949 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:42:02,957 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:42:02,958 INFO L301 CfgBuilder]: Removed 31 assume(true) statements. [2021-11-20 06:42:02,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:42:02 BoogieIcfgContainer [2021-11-20 06:42:02,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:42:02,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:42:02,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:42:02,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:42:02,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:42:00" (1/3) ... [2021-11-20 06:42:02,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73786260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:42:02, skipping insertion in model container [2021-11-20 06:42:02,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:01" (2/3) ... [2021-11-20 06:42:02,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73786260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:42:02, skipping insertion in model container [2021-11-20 06:42:02,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:42:02" (3/3) ... [2021-11-20 06:42:02,969 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test1-1.i [2021-11-20 06:42:02,975 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:42:02,975 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:42:03,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:42:03,036 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 06:42:03,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:42:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 122 states have internal predecessors, (185), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:42:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:42:03,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:03,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:03,089 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:03,094 INFO L85 PathProgramCache]: Analyzing trace with hash -388532060, now seen corresponding path program 1 times [2021-11-20 06:42:03,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:03,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14590198] [2021-11-20 06:42:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:03,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:03,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:03,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14590198] [2021-11-20 06:42:03,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14590198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:03,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:03,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:42:03,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044599793] [2021-11-20 06:42:03,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:03,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:42:03,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:03,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:42:03,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:42:03,391 INFO L87 Difference]: Start difference. First operand has 128 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 122 states have internal predecessors, (185), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:03,522 INFO L93 Difference]: Finished difference Result 341 states and 579 transitions. [2021-11-20 06:42:03,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:42:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:42:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:03,542 INFO L225 Difference]: With dead ends: 341 [2021-11-20 06:42:03,542 INFO L226 Difference]: Without dead ends: 211 [2021-11-20 06:42:03,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:42:03,551 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 107 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:03,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 345 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:42:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-20 06:42:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 125. [2021-11-20 06:42:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 119 states have internal predecessors, (146), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:42:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2021-11-20 06:42:03,633 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 10 [2021-11-20 06:42:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:03,633 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2021-11-20 06:42:03,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2021-11-20 06:42:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:42:03,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:03,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:03,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:42:03,639 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:03,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1583744873, now seen corresponding path program 1 times [2021-11-20 06:42:03,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:03,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764291810] [2021-11-20 06:42:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:03,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:03,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:42:03,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017740754] [2021-11-20 06:42:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:03,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:03,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:03,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:03,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:42:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:42:03,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:04,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:42:04,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:04,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764291810] [2021-11-20 06:42:04,048 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:42:04,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017740754] [2021-11-20 06:42:04,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017740754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:04,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:04,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:42:04,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120551877] [2021-11-20 06:42:04,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:04,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:42:04,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:04,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:42:04,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:42:04,057 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:04,151 INFO L93 Difference]: Finished difference Result 268 states and 372 transitions. [2021-11-20 06:42:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:42:04,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-20 06:42:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:04,155 INFO L225 Difference]: With dead ends: 268 [2021-11-20 06:42:04,155 INFO L226 Difference]: Without dead ends: 146 [2021-11-20 06:42:04,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:42:04,158 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 9 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:04,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 287 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:42:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-20 06:42:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-11-20 06:42:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 129 states have (on average 1.2868217054263567) internal successors, (166), 139 states have internal predecessors, (166), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:42:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-11-20 06:42:04,177 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 61 [2021-11-20 06:42:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:04,178 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-11-20 06:42:04,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:04,179 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-11-20 06:42:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:42:04,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:04,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:04,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:04,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:04,390 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1230656491, now seen corresponding path program 1 times [2021-11-20 06:42:04,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:04,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342939013] [2021-11-20 06:42:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:04,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:04,405 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:42:04,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892638831] [2021-11-20 06:42:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:04,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:04,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:04,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:04,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:42:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:42:04,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:04,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:42:04,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:04,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342939013] [2021-11-20 06:42:04,753 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:42:04,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892638831] [2021-11-20 06:42:04,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892638831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:04,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:04,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:42:04,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134837152] [2021-11-20 06:42:04,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:04,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:42:04,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:04,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:42:04,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:42:04,760 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:04,863 INFO L93 Difference]: Finished difference Result 279 states and 373 transitions. [2021-11-20 06:42:04,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:42:04,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-20 06:42:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:04,869 INFO L225 Difference]: With dead ends: 279 [2021-11-20 06:42:04,869 INFO L226 Difference]: Without dead ends: 137 [2021-11-20 06:42:04,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:42:04,879 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 124 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:04,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 317 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:42:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-20 06:42:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2021-11-20 06:42:04,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 115 states have (on average 1.2608695652173914) internal successors, (145), 125 states have internal predecessors, (145), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:42:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 171 transitions. [2021-11-20 06:42:04,911 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 171 transitions. Word has length 61 [2021-11-20 06:42:04,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:04,913 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 171 transitions. [2021-11-20 06:42:04,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 171 transitions. [2021-11-20 06:42:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:42:04,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:04,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:04,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:05,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:05,137 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:05,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:05,138 INFO L85 PathProgramCache]: Analyzing trace with hash -758509789, now seen corresponding path program 1 times [2021-11-20 06:42:05,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:05,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804977441] [2021-11-20 06:42:05,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:05,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:05,156 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:42:05,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291068807] [2021-11-20 06:42:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:05,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:05,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:05,158 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:05,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:42:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:05,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:42:05,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:05,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:05,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:05,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804977441] [2021-11-20 06:42:05,704 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:42:05,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291068807] [2021-11-20 06:42:05,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291068807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:05,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:05,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-20 06:42:05,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670108405] [2021-11-20 06:42:05,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:05,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:42:05,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:42:05,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:42:05,709 INFO L87 Difference]: Start difference. First operand 131 states and 171 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:05,816 INFO L93 Difference]: Finished difference Result 441 states and 563 transitions. [2021-11-20 06:42:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:42:05,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-20 06:42:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:05,821 INFO L225 Difference]: With dead ends: 441 [2021-11-20 06:42:05,822 INFO L226 Difference]: Without dead ends: 410 [2021-11-20 06:42:05,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:42:05,824 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 468 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:05,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 612 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:42:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-20 06:42:05,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-11-20 06:42:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 385 states have (on average 1.2103896103896103) internal successors, (466), 395 states have internal predecessors, (466), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:42:05,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 510 transitions. [2021-11-20 06:42:05,869 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 510 transitions. Word has length 61 [2021-11-20 06:42:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:05,870 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 510 transitions. [2021-11-20 06:42:05,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 510 transitions. [2021-11-20 06:42:05,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-20 06:42:05,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:05,890 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:05,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:06,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:06,110 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:06,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash -188814364, now seen corresponding path program 2 times [2021-11-20 06:42:06,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:06,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563850937] [2021-11-20 06:42:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:06,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:06,163 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:42:06,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312527137] [2021-11-20 06:42:06,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:42:06,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:06,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:06,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:06,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:42:06,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 06:42:06,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:06,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:42:06,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-11-20 06:42:07,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:42:07,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:07,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563850937] [2021-11-20 06:42:07,668 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:42:07,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312527137] [2021-11-20 06:42:07,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312527137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:07,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:07,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:42:07,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912087864] [2021-11-20 06:42:07,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:07,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:42:07,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:07,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:42:07,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:42:07,673 INFO L87 Difference]: Start difference. First operand 410 states and 510 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:07,895 INFO L93 Difference]: Finished difference Result 762 states and 954 transitions. [2021-11-20 06:42:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:42:07,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-11-20 06:42:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:07,899 INFO L225 Difference]: With dead ends: 762 [2021-11-20 06:42:07,899 INFO L226 Difference]: Without dead ends: 408 [2021-11-20 06:42:07,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 211 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 06:42:07,903 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 15 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:07,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 442 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:42:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-20 06:42:07,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2021-11-20 06:42:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 383 states have (on average 1.2088772845953002) internal successors, (463), 393 states have internal predecessors, (463), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:42:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 507 transitions. [2021-11-20 06:42:07,939 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 507 transitions. Word has length 214 [2021-11-20 06:42:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:07,941 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 507 transitions. [2021-11-20 06:42:07,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 507 transitions. [2021-11-20 06:42:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-20 06:42:07,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:07,949 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-20 06:42:07,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:08,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:08,177 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:08,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:08,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1697940859, now seen corresponding path program 1 times [2021-11-20 06:42:08,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:08,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776940739] [2021-11-20 06:42:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:08,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:08,219 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:42:08,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479005446] [2021-11-20 06:42:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:08,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:08,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:08,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:08,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:42:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:08,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:42:08,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:42:08,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:42:09,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:09,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776940739] [2021-11-20 06:42:09,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:42:09,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479005446] [2021-11-20 06:42:09,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479005446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:09,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:09,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 06:42:09,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465561180] [2021-11-20 06:42:09,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:09,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:42:09,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:09,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:42:09,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:42:09,568 INFO L87 Difference]: Start difference. First operand 408 states and 507 transitions. Second operand has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 3 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 06:42:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:09,832 INFO L93 Difference]: Finished difference Result 997 states and 1241 transitions. [2021-11-20 06:42:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:42:09,833 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 3 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 229 [2021-11-20 06:42:09,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:09,845 INFO L225 Difference]: With dead ends: 997 [2021-11-20 06:42:09,845 INFO L226 Difference]: Without dead ends: 966 [2021-11-20 06:42:09,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:42:09,851 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 1477 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:09,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 1467 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:42:09,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-20 06:42:09,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 966. [2021-11-20 06:42:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 923 states have (on average 1.1971830985915493) internal successors, (1105), 933 states have internal predecessors, (1105), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-20 06:42:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1185 transitions. [2021-11-20 06:42:09,901 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1185 transitions. Word has length 229 [2021-11-20 06:42:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:09,903 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1185 transitions. [2021-11-20 06:42:09,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 3 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 06:42:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1185 transitions. [2021-11-20 06:42:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2021-11-20 06:42:09,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:09,918 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 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 06:42:09,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:10,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:10,133 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:10,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1369564891, now seen corresponding path program 2 times [2021-11-20 06:42:10,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:10,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277828594] [2021-11-20 06:42:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:10,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:10,182 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:42:10,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739887857] [2021-11-20 06:42:10,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:42:10,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:10,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:10,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:10,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:51:06,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:51:06,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:51:07,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:51:07,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2021-11-20 06:51:08,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:08,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:08,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277828594] [2021-11-20 06:51:08,246 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:51:08,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739887857] [2021-11-20 06:51:08,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739887857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:08,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:51:08,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:51:08,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55721813] [2021-11-20 06:51:08,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:08,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:51:08,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:51:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:51:08,250 INFO L87 Difference]: Start difference. First operand 966 states and 1185 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 06:51:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:08,312 INFO L93 Difference]: Finished difference Result 1885 states and 2347 transitions. [2021-11-20 06:51:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:51:08,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 535 [2021-11-20 06:51:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:08,321 INFO L225 Difference]: With dead ends: 1885 [2021-11-20 06:51:08,321 INFO L226 Difference]: Without dead ends: 969 [2021-11-20 06:51:08,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:51:08,324 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 2 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:08,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 479 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:51:08,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-20 06:51:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 969. [2021-11-20 06:51:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 925 states have (on average 1.1978378378378378) internal successors, (1108), 936 states have internal predecessors, (1108), 40 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2021-11-20 06:51:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1198 transitions. [2021-11-20 06:51:08,366 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1198 transitions. Word has length 535 [2021-11-20 06:51:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:08,366 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1198 transitions. [2021-11-20 06:51:08,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 06:51:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1198 transitions. [2021-11-20 06:51:08,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-11-20 06:51:08,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:08,396 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 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 06:51:08,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 06:51:08,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:51:08,610 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:08,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:08,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1859396857, now seen corresponding path program 1 times [2021-11-20 06:51:08,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:08,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392793538] [2021-11-20 06:51:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:08,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:08,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:51:08,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157305665] [2021-11-20 06:51:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:08,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:08,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:08,646 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:08,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:52:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:34,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:52:34,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 332 proven. 1 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2021-11-20 06:52:35,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:52:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 325 proven. 7 refuted. 0 times theorem prover too weak. 1964 trivial. 0 not checked. [2021-11-20 06:52:36,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:36,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392793538] [2021-11-20 06:52:36,102 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:52:36,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157305665] [2021-11-20 06:52:36,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157305665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:52:36,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:52:36,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:52:36,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005012661] [2021-11-20 06:52:36,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:52:36,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:52:36,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:36,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:52:36,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:52:36,107 INFO L87 Difference]: Start difference. First operand 969 states and 1198 transitions. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:52:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:36,282 INFO L93 Difference]: Finished difference Result 1899 states and 2395 transitions. [2021-11-20 06:52:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:52:36,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 537 [2021-11-20 06:52:36,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:36,291 INFO L225 Difference]: With dead ends: 1899 [2021-11-20 06:52:36,291 INFO L226 Difference]: Without dead ends: 980 [2021-11-20 06:52:36,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1077 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:52:36,294 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 17 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:36,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 484 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:52:36,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-11-20 06:52:36,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 978. [2021-11-20 06:52:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 933 states have (on average 1.202572347266881) internal successors, (1122), 944 states have internal predecessors, (1122), 40 states have call successors, (40), 3 states have call predecessors, (40), 4 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2021-11-20 06:52:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1212 transitions. [2021-11-20 06:52:36,346 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1212 transitions. Word has length 537 [2021-11-20 06:52:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:36,346 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1212 transitions. [2021-11-20 06:52:36,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:52:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1212 transitions. [2021-11-20 06:52:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2021-11-20 06:52:36,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:36,365 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 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 06:52:36,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:52:36,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:52:36,566 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash 804214629, now seen corresponding path program 2 times [2021-11-20 06:52:36,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:52:36,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36548931] [2021-11-20 06:52:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:36,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:52:36,596 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:52:36,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009524603] [2021-11-20 06:52:36,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:52:36,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:52:36,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:52:36,598 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:52:36,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:54:41,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:54:41,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:54:41,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:54:41,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2318 backedges. 343 proven. 10 refuted. 0 times theorem prover too weak. 1965 trivial. 0 not checked. [2021-11-20 06:54:42,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2318 backedges. 325 proven. 27 refuted. 0 times theorem prover too weak. 1966 trivial. 0 not checked. [2021-11-20 06:54:43,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36548931] [2021-11-20 06:54:43,640 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:54:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009524603] [2021-11-20 06:54:43,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009524603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:43,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:54:43,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-11-20 06:54:43,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656708332] [2021-11-20 06:54:43,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:43,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:54:43,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:43,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:54:43,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:54:43,644 INFO L87 Difference]: Start difference. First operand 978 states and 1212 transitions. Second operand has 15 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:54:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:44,924 INFO L93 Difference]: Finished difference Result 1939 states and 2500 transitions. [2021-11-20 06:54:44,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:54:44,925 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 541 [2021-11-20 06:54:44,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:44,932 INFO L225 Difference]: With dead ends: 1939 [2021-11-20 06:54:44,932 INFO L226 Difference]: Without dead ends: 961 [2021-11-20 06:54:44,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1067 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:54:44,936 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 181 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:44,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 939 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:54:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2021-11-20 06:54:44,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 957. [2021-11-20 06:54:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 912 states have (on average 1.1962719298245614) internal successors, (1091), 923 states have internal predecessors, (1091), 40 states have call successors, (40), 3 states have call predecessors, (40), 4 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2021-11-20 06:54:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1181 transitions. [2021-11-20 06:54:44,980 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1181 transitions. Word has length 541 [2021-11-20 06:54:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:44,981 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 1181 transitions. [2021-11-20 06:54:44,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:54:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1181 transitions. [2021-11-20 06:54:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2021-11-20 06:54:44,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:44,989 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 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 06:54:45,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:45,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:45,205 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1978767717, now seen corresponding path program 3 times [2021-11-20 06:54:45,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:45,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293530668] [2021-11-20 06:54:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:45,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:45,260 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:54:45,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490976938] [2021-11-20 06:54:45,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:54:45,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:45,261 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:45,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b886a11f-6700-4e59-b009-23c8f68e1138/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process