./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/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 d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:34:15,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:34:15,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:34:15,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:34:15,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:34:15,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:34:15,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:34:15,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:34:15,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:34:15,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:34:15,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:34:15,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:34:15,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:34:15,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:34:15,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:34:15,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:34:15,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:34:15,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:34:15,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:34:15,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:34:15,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:34:15,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:34:15,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:34:15,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:34:15,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:34:15,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:34:15,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:34:15,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:34:15,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:34:15,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:34:15,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:34:15,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:34:15,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:34:15,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:34:15,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:34:15,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:34:15,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:34:15,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:34:15,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:34:15,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:34:15,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:34:15,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:34:15,665 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:34:15,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:34:15,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:34:15,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:34:15,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:34:15,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:34:15,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:34:15,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:34:15,668 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:34:15,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:34:15,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:34:15,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:34:15,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:34:15,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:34:15,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:34:15,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:34:15,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:34:15,670 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:34:15,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:34:15,671 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:34:15,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:34:15,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:34:15,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:34:15,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:34:15,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:34:15,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:34:15,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:34:15,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:34:15,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:34:15,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:34:15,674 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:34:15,674 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:34:15,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:34:15,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:34:15,675 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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c [2021-11-20 05:34:16,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:34:16,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:34:16,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:34:16,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:34:16,120 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:34:16,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2021-11-20 05:34:16,218 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/data/2072eac64/cf449096124c4513b059674789ce858d/FLAG8c58c99d7 [2021-11-20 05:34:17,068 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:34:17,069 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2021-11-20 05:34:17,101 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/data/2072eac64/cf449096124c4513b059674789ce858d/FLAG8c58c99d7 [2021-11-20 05:34:17,208 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/data/2072eac64/cf449096124c4513b059674789ce858d [2021-11-20 05:34:17,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:34:17,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:34:17,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:34:17,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:34:17,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:34:17,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:34:17" (1/1) ... [2021-11-20 05:34:17,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e60e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:17, skipping insertion in model container [2021-11-20 05:34:17,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:34:17" (1/1) ... [2021-11-20 05:34:17,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:34:17,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:34:18,073 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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2021-11-20 05:34:18,085 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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2021-11-20 05:34:18,199 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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2021-11-20 05:34:18,200 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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2021-11-20 05:34:18,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:34:18,230 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:34:18,287 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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2021-11-20 05:34:18,290 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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2021-11-20 05:34:18,377 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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2021-11-20 05:34:18,378 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_141bcf75-fa49-4675-af8d-e6cc1e0c358f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2021-11-20 05:34:18,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:34:18,466 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:34:18,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18 WrapperNode [2021-11-20 05:34:18,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:34:18,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:34:18,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:34:18,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:34:18,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18" (1/1) ... [2021-11-20 05:34:18,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18" (1/1) ... [2021-11-20 05:34:18,631 INFO L137 Inliner]: procedures = 282, calls = 347, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1199 [2021-11-20 05:34:18,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:34:18,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:34:18,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:34:18,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:34:18,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18" (1/1) ... [2021-11-20 05:34:18,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18" (1/1) ... [2021-11-20 05:34:18,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18" (1/1) ... [2021-11-20 05:34:18,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18" (1/1) ... [2021-11-20 05:34:18,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18" (1/1) ... [2021-11-20 05:34:18,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18" (1/1) ... [2021-11-20 05:34:18,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18" (1/1) ... [2021-11-20 05:34:18,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:34:18,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:34:18,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:34:18,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:34:18,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18" (1/1) ... [2021-11-20 05:34:18,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:34:18,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:18,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:34:18,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:34:19,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:34:19,013 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 05:34:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:34:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:34:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-20 05:34:19,015 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-20 05:34:19,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:34:19,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 05:34:19,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 05:34:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:34:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:34:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:34:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-20 05:34:19,017 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-20 05:34:19,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:34:19,018 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-20 05:34:19,018 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-20 05:34:19,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:34:19,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:34:19,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:34:19,347 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:34:19,349 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:34:20,728 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:34:20,740 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:34:20,740 INFO L301 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-20 05:34:20,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:34:20 BoogieIcfgContainer [2021-11-20 05:34:20,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:34:20,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:34:20,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:34:20,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:34:20,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:34:17" (1/3) ... [2021-11-20 05:34:20,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415df26f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:34:20, skipping insertion in model container [2021-11-20 05:34:20,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:18" (2/3) ... [2021-11-20 05:34:20,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415df26f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:34:20, skipping insertion in model container [2021-11-20 05:34:20,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:34:20" (3/3) ... [2021-11-20 05:34:20,754 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test6-2.i [2021-11-20 05:34:20,761 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:34:20,761 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-20 05:34:20,824 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:34:20,832 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:34:20,833 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-20 05:34:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 234 states have (on average 1.6367521367521367) internal successors, (383), 238 states have internal predecessors, (383), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 05:34:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 05:34:20,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:20,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:20,869 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:20,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:20,876 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-20 05:34:20,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:20,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613395095] [2021-11-20 05:34:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:20,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:21,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:21,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613395095] [2021-11-20 05:34:21,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613395095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:21,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:21,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:34:21,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858050885] [2021-11-20 05:34:21,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:21,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:34:21,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:34:21,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:34:21,173 INFO L87 Difference]: Start difference. First operand has 258 states, 234 states have (on average 1.6367521367521367) internal successors, (383), 238 states have internal predecessors, (383), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:21,262 INFO L93 Difference]: Finished difference Result 511 states and 836 transitions. [2021-11-20 05:34:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:34:21,271 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 05:34:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:21,293 INFO L225 Difference]: With dead ends: 511 [2021-11-20 05:34:21,294 INFO L226 Difference]: Without dead ends: 251 [2021-11-20 05:34:21,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:34:21,313 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:21,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:34:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-20 05:34:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-11-20 05:34:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 228 states have (on average 1.3026315789473684) internal successors, (297), 232 states have internal predecessors, (297), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 05:34:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 327 transitions. [2021-11-20 05:34:21,437 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 327 transitions. Word has length 8 [2021-11-20 05:34:21,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:21,438 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 327 transitions. [2021-11-20 05:34:21,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 327 transitions. [2021-11-20 05:34:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 05:34:21,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:21,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:21,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:34:21,440 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:21,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-20 05:34:21,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:21,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265712706] [2021-11-20 05:34:21,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:21,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:21,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:21,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265712706] [2021-11-20 05:34:21,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265712706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:21,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:21,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:34:21,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653473591] [2021-11-20 05:34:21,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:21,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:34:21,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:21,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:34:21,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:34:21,530 INFO L87 Difference]: Start difference. First operand 251 states and 327 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:22,161 INFO L93 Difference]: Finished difference Result 547 states and 718 transitions. [2021-11-20 05:34:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:34:22,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 05:34:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:22,166 INFO L225 Difference]: With dead ends: 547 [2021-11-20 05:34:22,167 INFO L226 Difference]: Without dead ends: 405 [2021-11-20 05:34:22,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:34:22,170 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 179 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:22,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 880 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:34:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-20 05:34:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 253. [2021-11-20 05:34:22,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 230 states have (on average 1.3) internal successors, (299), 234 states have internal predecessors, (299), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 05:34:22,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 329 transitions. [2021-11-20 05:34:22,218 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 329 transitions. Word has length 10 [2021-11-20 05:34:22,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:22,219 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 329 transitions. [2021-11-20 05:34:22,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 329 transitions. [2021-11-20 05:34:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 05:34:22,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:22,223 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] [2021-11-20 05:34:22,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:34:22,226 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:22,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1739977374, now seen corresponding path program 1 times [2021-11-20 05:34:22,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:22,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124656897] [2021-11-20 05:34:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:22,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:22,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:22,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146320373] [2021-11-20 05:34:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:22,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:22,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:22,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:22,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:34:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:22,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:34:22,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:22,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:22,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:22,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124656897] [2021-11-20 05:34:22,749 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:22,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146320373] [2021-11-20 05:34:22,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146320373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:22,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:22,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:22,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675224602] [2021-11-20 05:34:22,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:22,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:22,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:22,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:22,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:22,753 INFO L87 Difference]: Start difference. First operand 253 states and 329 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:22,843 INFO L93 Difference]: Finished difference Result 523 states and 685 transitions. [2021-11-20 05:34:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:22,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-20 05:34:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:22,847 INFO L225 Difference]: With dead ends: 523 [2021-11-20 05:34:22,847 INFO L226 Difference]: Without dead ends: 274 [2021-11-20 05:34:22,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 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 05:34:22,852 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 9 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 599 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 05:34:22,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 599 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:34:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-20 05:34:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-11-20 05:34:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 250 states have (on average 1.276) internal successors, (319), 254 states have internal predecessors, (319), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 05:34:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 349 transitions. [2021-11-20 05:34:22,878 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 349 transitions. Word has length 47 [2021-11-20 05:34:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:22,878 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 349 transitions. [2021-11-20 05:34:22,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 349 transitions. [2021-11-20 05:34:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 05:34:22,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:22,881 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] [2021-11-20 05:34:22,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:23,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:23,103 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1599428764, now seen corresponding path program 1 times [2021-11-20 05:34:23,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:23,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180196035] [2021-11-20 05:34:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:23,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:23,147 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:23,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320486588] [2021-11-20 05:34:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:23,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:23,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:23,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:23,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:34:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:23,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:34:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:23,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:23,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:23,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180196035] [2021-11-20 05:34:23,565 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:23,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320486588] [2021-11-20 05:34:23,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320486588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:23,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:23,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:34:23,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225363537] [2021-11-20 05:34:23,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:23,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:34:23,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:23,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:34:23,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:34:23,568 INFO L87 Difference]: Start difference. First operand 273 states and 349 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:23,689 INFO L93 Difference]: Finished difference Result 535 states and 687 transitions. [2021-11-20 05:34:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:34:23,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-20 05:34:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:23,692 INFO L225 Difference]: With dead ends: 535 [2021-11-20 05:34:23,692 INFO L226 Difference]: Without dead ends: 266 [2021-11-20 05:34:23,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 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 05:34:23,694 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 264 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 650 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 05:34:23,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 650 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:34:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-20 05:34:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 259. [2021-11-20 05:34:23,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 236 states have (on average 1.2627118644067796) internal successors, (298), 240 states have internal predecessors, (298), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 05:34:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 328 transitions. [2021-11-20 05:34:23,741 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 328 transitions. Word has length 47 [2021-11-20 05:34:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:23,741 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 328 transitions. [2021-11-20 05:34:23,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:23,742 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 328 transitions. [2021-11-20 05:34:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 05:34:23,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:23,744 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] [2021-11-20 05:34:23,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:23,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:23,945 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:23,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1265789014, now seen corresponding path program 1 times [2021-11-20 05:34:23,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:23,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691862248] [2021-11-20 05:34:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:23,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:23,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:23,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497370687] [2021-11-20 05:34:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:23,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:23,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:23,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:24,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:34:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:24,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:34:24,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:24,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:24,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691862248] [2021-11-20 05:34:24,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:24,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497370687] [2021-11-20 05:34:24,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497370687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:24,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:24,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:34:24,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895395560] [2021-11-20 05:34:24,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:24,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:34:24,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:24,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:34:24,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:34:24,354 INFO L87 Difference]: Start difference. First operand 259 states and 328 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:24,425 INFO L93 Difference]: Finished difference Result 271 states and 340 transitions. [2021-11-20 05:34:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:34:24,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-20 05:34:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:24,429 INFO L225 Difference]: With dead ends: 271 [2021-11-20 05:34:24,429 INFO L226 Difference]: Without dead ends: 269 [2021-11-20 05:34:24,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:34:24,431 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 13 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:24,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1569 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:34:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-20 05:34:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-11-20 05:34:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 243 states have (on average 1.2592592592592593) internal successors, (306), 248 states have internal predecessors, (306), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 05:34:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 338 transitions. [2021-11-20 05:34:24,447 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 338 transitions. Word has length 47 [2021-11-20 05:34:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:24,448 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 338 transitions. [2021-11-20 05:34:24,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 338 transitions. [2021-11-20 05:34:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 05:34:24,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:24,451 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] [2021-11-20 05:34:24,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:24,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:24,668 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:24,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2015855482, now seen corresponding path program 1 times [2021-11-20 05:34:24,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:24,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590173309] [2021-11-20 05:34:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:24,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:24,697 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:24,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193879528] [2021-11-20 05:34:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:24,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:24,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:24,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:24,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:34:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:24,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:34:24,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:25,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:25,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:25,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590173309] [2021-11-20 05:34:25,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:25,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193879528] [2021-11-20 05:34:25,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193879528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:25,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:25,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:25,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719403381] [2021-11-20 05:34:25,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:25,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:25,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:25,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:25,081 INFO L87 Difference]: Start difference. First operand 269 states and 338 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:25,111 INFO L93 Difference]: Finished difference Result 535 states and 674 transitions. [2021-11-20 05:34:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:25,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-20 05:34:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:25,116 INFO L225 Difference]: With dead ends: 535 [2021-11-20 05:34:25,116 INFO L226 Difference]: Without dead ends: 270 [2021-11-20 05:34:25,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 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 05:34:25,119 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 0 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:25,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 633 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:34:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-20 05:34:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-11-20 05:34:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 244 states have (on average 1.2581967213114753) internal successors, (307), 249 states have internal predecessors, (307), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 05:34:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 339 transitions. [2021-11-20 05:34:25,137 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 339 transitions. Word has length 58 [2021-11-20 05:34:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:25,138 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 339 transitions. [2021-11-20 05:34:25,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 339 transitions. [2021-11-20 05:34:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 05:34:25,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:25,141 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] [2021-11-20 05:34:25,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:25,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:25,357 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1886084804, now seen corresponding path program 1 times [2021-11-20 05:34:25,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:25,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783544490] [2021-11-20 05:34:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:25,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:25,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:25,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487522644] [2021-11-20 05:34:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:25,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:25,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:25,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:25,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:34:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:34:25,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:25,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:25,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:25,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783544490] [2021-11-20 05:34:25,985 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:25,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487522644] [2021-11-20 05:34:25,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487522644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:25,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:25,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:25,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138579513] [2021-11-20 05:34:25,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:25,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:25,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:25,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:25,989 INFO L87 Difference]: Start difference. First operand 270 states and 339 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:26,165 INFO L93 Difference]: Finished difference Result 690 states and 873 transitions. [2021-11-20 05:34:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-20 05:34:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:26,170 INFO L225 Difference]: With dead ends: 690 [2021-11-20 05:34:26,172 INFO L226 Difference]: Without dead ends: 424 [2021-11-20 05:34:26,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 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 05:34:26,174 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 143 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:26,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 642 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:34:26,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-20 05:34:26,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 385. [2021-11-20 05:34:26,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 356 states have (on average 1.2556179775280898) internal successors, (447), 361 states have internal predecessors, (447), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-20 05:34:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 485 transitions. [2021-11-20 05:34:26,203 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 485 transitions. Word has length 58 [2021-11-20 05:34:26,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:26,205 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 485 transitions. [2021-11-20 05:34:26,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:26,206 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 485 transitions. [2021-11-20 05:34:26,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 05:34:26,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:26,207 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:26,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:26,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:26,431 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1360052348, now seen corresponding path program 1 times [2021-11-20 05:34:26,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:26,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741560737] [2021-11-20 05:34:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:26,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:26,458 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:26,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754634633] [2021-11-20 05:34:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:26,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:26,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:26,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:26,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:34:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:34:26,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:26,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:27,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:27,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741560737] [2021-11-20 05:34:27,174 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:27,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754634633] [2021-11-20 05:34:27,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754634633] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:27,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:34:27,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2021-11-20 05:34:27,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568757784] [2021-11-20 05:34:27,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:27,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:34:27,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:27,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:34:27,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:34:27,178 INFO L87 Difference]: Start difference. First operand 385 states and 485 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:34:27,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:27,400 INFO L93 Difference]: Finished difference Result 1424 states and 1846 transitions. [2021-11-20 05:34:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:34:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2021-11-20 05:34:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:27,412 INFO L225 Difference]: With dead ends: 1424 [2021-11-20 05:34:27,412 INFO L226 Difference]: Without dead ends: 1088 [2021-11-20 05:34:27,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:34:27,414 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 1280 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:27,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 1253 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:34:27,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-11-20 05:34:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 659. [2021-11-20 05:34:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 617 states have (on average 1.2690437601296596) internal successors, (783), 623 states have internal predecessors, (783), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-20 05:34:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 840 transitions. [2021-11-20 05:34:27,461 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 840 transitions. Word has length 62 [2021-11-20 05:34:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:27,461 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 840 transitions. [2021-11-20 05:34:27,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:34:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 840 transitions. [2021-11-20 05:34:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 05:34:27,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:27,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:34:27,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 05:34:27,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 05:34:27,681 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash 643772401, now seen corresponding path program 1 times [2021-11-20 05:34:27,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:27,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966112977] [2021-11-20 05:34:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:27,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:27,708 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:27,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763973290] [2021-11-20 05:34:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:27,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:27,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:27,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:27,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:34:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:27,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:34:27,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:34:28,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:28,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:28,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966112977] [2021-11-20 05:34:28,243 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:28,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763973290] [2021-11-20 05:34:28,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763973290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:28,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:28,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:34:28,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787535790] [2021-11-20 05:34:28,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:28,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:34:28,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:34:28,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:34:28,247 INFO L87 Difference]: Start difference. First operand 659 states and 840 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 05:34:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:28,392 INFO L93 Difference]: Finished difference Result 1250 states and 1604 transitions. [2021-11-20 05:34:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:34:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 93 [2021-11-20 05:34:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:28,400 INFO L225 Difference]: With dead ends: 1250 [2021-11-20 05:34:28,400 INFO L226 Difference]: Without dead ends: 659 [2021-11-20 05:34:28,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:34:28,405 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 25 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:28,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 1168 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:34:28,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-20 05:34:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2021-11-20 05:34:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 617 states have (on average 1.2690437601296596) internal successors, (783), 623 states have internal predecessors, (783), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-20 05:34:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 839 transitions. [2021-11-20 05:34:28,448 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 839 transitions. Word has length 93 [2021-11-20 05:34:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:28,450 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 839 transitions. [2021-11-20 05:34:28,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 05:34:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 839 transitions. [2021-11-20 05:34:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 05:34:28,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:28,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:34:28,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:28,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:28,685 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:28,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:28,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1976180910, now seen corresponding path program 1 times [2021-11-20 05:34:28,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:28,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730213434] [2021-11-20 05:34:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:28,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:28,713 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:28,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954122461] [2021-11-20 05:34:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:28,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:28,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:28,715 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:28,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:34:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:28,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:34:28,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:29,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 05:34:29,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 05:34:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 05:34:29,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:29,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:29,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730213434] [2021-11-20 05:34:29,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:29,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954122461] [2021-11-20 05:34:29,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954122461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:29,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:29,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:34:29,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216711324] [2021-11-20 05:34:29,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:29,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:34:29,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:29,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:34:29,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:34:29,205 INFO L87 Difference]: Start difference. First operand 659 states and 839 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 05:34:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:29,612 INFO L93 Difference]: Finished difference Result 927 states and 1199 transitions. [2021-11-20 05:34:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:34:29,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 98 [2021-11-20 05:34:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:29,618 INFO L225 Difference]: With dead ends: 927 [2021-11-20 05:34:29,618 INFO L226 Difference]: Without dead ends: 830 [2021-11-20 05:34:29,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 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 05:34:29,619 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 140 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:29,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 833 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:34:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-11-20 05:34:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 663. [2021-11-20 05:34:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 621 states have (on average 1.2673107890499196) internal successors, (787), 627 states have internal predecessors, (787), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-20 05:34:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 843 transitions. [2021-11-20 05:34:29,650 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 843 transitions. Word has length 98 [2021-11-20 05:34:29,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:29,651 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 843 transitions. [2021-11-20 05:34:29,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 05:34:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 843 transitions. [2021-11-20 05:34:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 05:34:29,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:29,653 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:29,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:29,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:34:29,877 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:29,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash -553663886, now seen corresponding path program 1 times [2021-11-20 05:34:29,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:29,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977845536] [2021-11-20 05:34:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:29,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:29,895 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:29,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454020564] [2021-11-20 05:34:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:29,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:29,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:29,909 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:29,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:34:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:30,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:34:30,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:34:30,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:30,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:30,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977845536] [2021-11-20 05:34:30,441 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:30,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454020564] [2021-11-20 05:34:30,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454020564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:30,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:30,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:34:30,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320989424] [2021-11-20 05:34:30,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:30,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:34:30,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:34:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:34:30,443 INFO L87 Difference]: Start difference. First operand 663 states and 843 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 05:34:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:30,591 INFO L93 Difference]: Finished difference Result 1266 states and 1623 transitions. [2021-11-20 05:34:30,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:34:30,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 110 [2021-11-20 05:34:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:30,597 INFO L225 Difference]: With dead ends: 1266 [2021-11-20 05:34:30,597 INFO L226 Difference]: Without dead ends: 668 [2021-11-20 05:34:30,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:34:30,599 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 18 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:30,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2107 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:34:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-20 05:34:30,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2021-11-20 05:34:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 625 states have (on average 1.2672) internal successors, (792), 632 states have internal predecessors, (792), 28 states have call successors, (28), 10 states have call predecessors, (28), 11 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-20 05:34:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 849 transitions. [2021-11-20 05:34:30,647 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 849 transitions. Word has length 110 [2021-11-20 05:34:30,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:30,648 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 849 transitions. [2021-11-20 05:34:30,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 05:34:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 849 transitions. [2021-11-20 05:34:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 05:34:30,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:30,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:30,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:30,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 05:34:30,877 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:30,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1849320704, now seen corresponding path program 1 times [2021-11-20 05:34:30,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:30,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069789992] [2021-11-20 05:34:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:30,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:30,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:30,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544399003] [2021-11-20 05:34:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:30,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:30,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:30,904 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:30,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:34:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:31,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 05:34:31,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 05:34:31,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 05:34:31,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:31,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069789992] [2021-11-20 05:34:31,897 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:31,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544399003] [2021-11-20 05:34:31,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544399003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:31,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:34:31,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-11-20 05:34:31,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806568771] [2021-11-20 05:34:31,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:31,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:34:31,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:34:31,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:34:31,901 INFO L87 Difference]: Start difference. First operand 668 states and 849 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 05:34:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:32,225 INFO L93 Difference]: Finished difference Result 1289 states and 1655 transitions. [2021-11-20 05:34:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:34:32,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 112 [2021-11-20 05:34:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:32,231 INFO L225 Difference]: With dead ends: 1289 [2021-11-20 05:34:32,231 INFO L226 Difference]: Without dead ends: 684 [2021-11-20 05:34:32,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:34:32,234 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 37 mSDsluCounter, 2113 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2419 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:32,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2419 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:34:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-11-20 05:34:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 681. [2021-11-20 05:34:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 637 states have (on average 1.271585557299843) internal successors, (810), 644 states have internal predecessors, (810), 28 states have call successors, (28), 11 states have call predecessors, (28), 12 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-20 05:34:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 867 transitions. [2021-11-20 05:34:32,270 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 867 transitions. Word has length 112 [2021-11-20 05:34:32,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:32,270 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 867 transitions. [2021-11-20 05:34:32,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 05:34:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 867 transitions. [2021-11-20 05:34:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:34:32,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:32,273 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:32,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:32,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:32,500 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1577750638, now seen corresponding path program 2 times [2021-11-20 05:34:32,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:32,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197264526] [2021-11-20 05:34:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:32,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:32,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:32,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695051190] [2021-11-20 05:34:32,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:34:32,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:32,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:32,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:34:41,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:34:41,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:41,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 05:34:41,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:34:42,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:34:42,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197264526] [2021-11-20 05:34:42,565 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695051190] [2021-11-20 05:34:42,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695051190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:42,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:34:42,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2021-11-20 05:34:42,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637727339] [2021-11-20 05:34:42,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:42,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:34:42,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:34:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:34:42,568 INFO L87 Difference]: Start difference. First operand 681 states and 867 transitions. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 05:34:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:43,804 INFO L93 Difference]: Finished difference Result 1382 states and 1772 transitions. [2021-11-20 05:34:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 05:34:43,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 116 [2021-11-20 05:34:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:43,810 INFO L225 Difference]: With dead ends: 1382 [2021-11-20 05:34:43,810 INFO L226 Difference]: Without dead ends: 699 [2021-11-20 05:34:43,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 05:34:43,813 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 329 mSDsluCounter, 2745 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 3049 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:43,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 3049 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:34:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-20 05:34:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 687. [2021-11-20 05:34:43,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 643 states have (on average 1.2690513219284603) internal successors, (816), 650 states have internal predecessors, (816), 28 states have call successors, (28), 11 states have call predecessors, (28), 12 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-20 05:34:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 873 transitions. [2021-11-20 05:34:43,850 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 873 transitions. Word has length 116 [2021-11-20 05:34:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:43,851 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 873 transitions. [2021-11-20 05:34:43,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 05:34:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 873 transitions. [2021-11-20 05:34:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 05:34:43,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:43,853 INFO L514 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:43,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:44,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:44,067 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 05:34:44,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:44,067 INFO L85 PathProgramCache]: Analyzing trace with hash -101405335, now seen corresponding path program 3 times [2021-11-20 05:34:44,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:44,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543784837] [2021-11-20 05:34:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:44,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:44,103 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:44,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990904368] [2021-11-20 05:34:44,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:34:44,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:44,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:44,105 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:44,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_141bcf75-fa49-4675-af8d-e6cc1e0c358f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process