./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/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 1d2a98d270a821b4275b6b35f502458543f3a892fcdda158c69925a18d34f6cf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:34:05,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:34:05,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:34:06,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:34:06,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:34:06,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:34:06,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:34:06,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:34:06,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:34:06,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:34:06,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:34:06,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:34:06,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:34:06,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:34:06,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:34:06,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:34:06,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:34:06,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:34:06,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:34:06,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:34:06,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:34:06,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:34:06,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:34:06,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:34:06,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:34:06,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:34:06,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:34:06,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:34:06,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:34:06,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:34:06,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:34:06,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:34:06,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:34:06,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:34:06,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:34:06,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:34:06,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:34:06,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:34:06,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:34:06,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:34:06,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:34:06,054 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:34:06,080 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:34:06,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:34:06,081 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:34:06,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:34:06,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:34:06,082 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:34:06,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:34:06,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:34:06,083 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:34:06,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:34:06,084 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:34:06,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:34:06,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:34:06,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:34:06,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:34:06,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:34:06,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:34:06,085 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:34:06,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:34:06,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:34:06,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:34:06,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:34:06,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:34:06,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:34:06,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:34:06,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:34:06,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:34:06,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:34:06,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:34:06,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:34:06,089 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:34:06,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:34:06,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:34:06,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:34:06,090 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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d2a98d270a821b4275b6b35f502458543f3a892fcdda158c69925a18d34f6cf [2021-11-20 05:34:06,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:34:06,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:34:06,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:34:06,353 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:34:06,354 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:34:06,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i [2021-11-20 05:34:06,448 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/data/27811f3bd/5c7e1100125b4957a38dac546b8e14ab/FLAGf1acf1e7c [2021-11-20 05:34:07,181 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:34:07,181 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i [2021-11-20 05:34:07,217 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/data/27811f3bd/5c7e1100125b4957a38dac546b8e14ab/FLAGf1acf1e7c [2021-11-20 05:34:07,354 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/data/27811f3bd/5c7e1100125b4957a38dac546b8e14ab [2021-11-20 05:34:07,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:34:07,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:34:07,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:34:07,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:34:07,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:34:07,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:34:07" (1/1) ... [2021-11-20 05:34:07,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef8a4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:07, skipping insertion in model container [2021-11-20 05:34:07,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:34:07" (1/1) ... [2021-11-20 05:34:07,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:34:07,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:34:08,019 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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[44118,44131] [2021-11-20 05:34:08,044 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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[44660,44673] [2021-11-20 05:34:08,183 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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[56247,56260] [2021-11-20 05:34:08,185 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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[56368,56381] [2021-11-20 05:34:08,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:34:08,211 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:34:08,246 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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[44118,44131] [2021-11-20 05:34:08,249 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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[44660,44673] [2021-11-20 05:34:08,312 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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[56247,56260] [2021-11-20 05:34:08,313 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_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-2.i[56368,56381] [2021-11-20 05:34:08,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:34:08,391 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:34:08,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08 WrapperNode [2021-11-20 05:34:08,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:34:08,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:34:08,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:34:08,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:34:08,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08" (1/1) ... [2021-11-20 05:34:08,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08" (1/1) ... [2021-11-20 05:34:08,523 INFO L137 Inliner]: procedures = 282, calls = 347, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1199 [2021-11-20 05:34:08,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:34:08,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:34:08,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:34:08,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:34:08,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08" (1/1) ... [2021-11-20 05:34:08,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08" (1/1) ... [2021-11-20 05:34:08,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08" (1/1) ... [2021-11-20 05:34:08,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08" (1/1) ... [2021-11-20 05:34:08,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08" (1/1) ... [2021-11-20 05:34:08,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08" (1/1) ... [2021-11-20 05:34:08,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08" (1/1) ... [2021-11-20 05:34:08,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:34:08,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:34:08,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:34:08,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:34:08,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08" (1/1) ... [2021-11-20 05:34:08,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:34:08,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:08,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:34:08,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:34:08,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:34:08,795 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 05:34:08,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:34:08,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:34:08,796 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-20 05:34:08,796 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-20 05:34:08,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:34:08,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 05:34:08,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 05:34:08,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:34:08,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:34:08,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:34:08,797 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-20 05:34:08,798 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-20 05:34:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:34:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-20 05:34:08,798 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-20 05:34:08,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:34:08,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:34:08,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:34:09,119 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:34:09,121 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:34:10,190 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:34:10,210 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:34:10,210 INFO L301 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-20 05:34:10,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:34:10 BoogieIcfgContainer [2021-11-20 05:34:10,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:34:10,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:34:10,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:34:10,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:34:10,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:34:07" (1/3) ... [2021-11-20 05:34:10,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ea73b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:34:10, skipping insertion in model container [2021-11-20 05:34:10,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:08" (2/3) ... [2021-11-20 05:34:10,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ea73b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:34:10, skipping insertion in model container [2021-11-20 05:34:10,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:34:10" (3/3) ... [2021-11-20 05:34:10,226 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test6-2.i [2021-11-20 05:34:10,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:34:10,238 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-20 05:34:10,351 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:34:10,370 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 05:34:10,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-20 05:34:10,415 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 05:34:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 05:34:10,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:10,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:10,421 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 05:34:10,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:10,427 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-20 05:34:10,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:10,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923622601] [2021-11-20 05:34:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:10,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:10,642 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 05:34:10,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:10,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923622601] [2021-11-20 05:34:10,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923622601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:10,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:10,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:34:10,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963810994] [2021-11-20 05:34:10,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:10,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:34:10,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:10,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:34:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:34:10,693 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 05:34:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:10,785 INFO L93 Difference]: Finished difference Result 511 states and 836 transitions. [2021-11-20 05:34:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:34:10,788 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 05:34:10,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:10,808 INFO L225 Difference]: With dead ends: 511 [2021-11-20 05:34:10,808 INFO L226 Difference]: Without dead ends: 251 [2021-11-20 05:34:10,816 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 05:34:10,821 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 05:34:10,823 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 05:34:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-20 05:34:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-11-20 05:34:10,903 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 05:34:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 327 transitions. [2021-11-20 05:34:10,909 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 327 transitions. Word has length 8 [2021-11-20 05:34:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:10,910 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 327 transitions. [2021-11-20 05:34:10,910 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 05:34:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 327 transitions. [2021-11-20 05:34:10,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 05:34:10,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:10,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:10,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:34:10,913 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 05:34:10,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:10,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-20 05:34:10,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:10,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113599680] [2021-11-20 05:34:10,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:10,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:11,002 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 05:34:11,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:11,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113599680] [2021-11-20 05:34:11,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113599680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:11,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:11,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:34:11,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345519175] [2021-11-20 05:34:11,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:11,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:34:11,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:11,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:34:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:34:11,006 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 05:34:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:11,485 INFO L93 Difference]: Finished difference Result 547 states and 718 transitions. [2021-11-20 05:34:11,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:34:11,486 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 05:34:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:11,489 INFO L225 Difference]: With dead ends: 547 [2021-11-20 05:34:11,489 INFO L226 Difference]: Without dead ends: 405 [2021-11-20 05:34:11,490 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 05:34:11,492 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 179 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:11,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 880 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:34:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-20 05:34:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 253. [2021-11-20 05:34:11,528 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 05:34:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 329 transitions. [2021-11-20 05:34:11,531 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 329 transitions. Word has length 10 [2021-11-20 05:34:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:11,533 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 329 transitions. [2021-11-20 05:34:11,533 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 05:34:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 329 transitions. [2021-11-20 05:34:11,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 05:34:11,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:11,536 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 05:34:11,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:34:11,537 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 05:34:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1739977374, now seen corresponding path program 1 times [2021-11-20 05:34:11,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:11,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261403146] [2021-11-20 05:34:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:11,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:11,601 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:11,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748924334] [2021-11-20 05:34:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:11,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:11,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:11,606 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:11,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:34:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:11,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:34:11,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:12,006 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 05:34:12,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:12,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:12,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261403146] [2021-11-20 05:34:12,007 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:12,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748924334] [2021-11-20 05:34:12,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748924334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:12,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:12,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:12,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691229736] [2021-11-20 05:34:12,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:12,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:12,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:12,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:12,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:12,010 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 05:34:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:12,102 INFO L93 Difference]: Finished difference Result 523 states and 685 transitions. [2021-11-20 05:34:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:12,103 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 05:34:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:12,105 INFO L225 Difference]: With dead ends: 523 [2021-11-20 05:34:12,105 INFO L226 Difference]: Without dead ends: 274 [2021-11-20 05:34:12,107 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 05:34:12,110 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 05:34:12,112 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 05:34:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-20 05:34:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-11-20 05:34:12,129 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 05:34:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 349 transitions. [2021-11-20 05:34:12,132 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 349 transitions. Word has length 47 [2021-11-20 05:34:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:12,132 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 349 transitions. [2021-11-20 05:34:12,134 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 05:34:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 349 transitions. [2021-11-20 05:34:12,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 05:34:12,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:12,138 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 05:34:12,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:12,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 05:34:12,354 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 05:34:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:12,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1599428764, now seen corresponding path program 1 times [2021-11-20 05:34:12,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:12,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803615125] [2021-11-20 05:34:12,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:12,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:12,389 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:12,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83734552] [2021-11-20 05:34:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:12,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:12,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:12,391 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:12,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:34:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:12,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:34:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:12,696 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 05:34:12,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:12,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:12,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803615125] [2021-11-20 05:34:12,697 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:12,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83734552] [2021-11-20 05:34:12,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83734552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:12,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:12,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:34:12,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298043084] [2021-11-20 05:34:12,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:12,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:34:12,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:34:12,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:34:12,701 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 05:34:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:12,795 INFO L93 Difference]: Finished difference Result 535 states and 687 transitions. [2021-11-20 05:34:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:34:12,796 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 05:34:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:12,798 INFO L225 Difference]: With dead ends: 535 [2021-11-20 05:34:12,798 INFO L226 Difference]: Without dead ends: 266 [2021-11-20 05:34:12,799 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 05:34:12,803 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 264 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 05:34:12,808 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 05:34:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-20 05:34:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 259. [2021-11-20 05:34:12,822 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 05:34:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 328 transitions. [2021-11-20 05:34:12,825 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 328 transitions. Word has length 47 [2021-11-20 05:34:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:12,828 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 328 transitions. [2021-11-20 05:34:12,828 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 05:34:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 328 transitions. [2021-11-20 05:34:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 05:34:12,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:12,833 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 05:34:12,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:13,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:13,049 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 05:34:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1265789014, now seen corresponding path program 1 times [2021-11-20 05:34:13,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:13,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559156646] [2021-11-20 05:34:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:13,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:13,069 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:13,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515744523] [2021-11-20 05:34:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:13,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:13,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:13,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:13,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:34:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:13,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:34:13,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:13,391 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 05:34:13,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:13,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:13,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559156646] [2021-11-20 05:34:13,393 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:13,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515744523] [2021-11-20 05:34:13,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515744523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:13,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:13,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:34:13,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643469020] [2021-11-20 05:34:13,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:13,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:34:13,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:34:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:34:13,397 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 05:34:13,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:13,459 INFO L93 Difference]: Finished difference Result 271 states and 340 transitions. [2021-11-20 05:34:13,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:34:13,459 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 05:34:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:13,462 INFO L225 Difference]: With dead ends: 271 [2021-11-20 05:34:13,462 INFO L226 Difference]: Without dead ends: 269 [2021-11-20 05:34:13,463 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 05:34:13,463 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 05:34:13,464 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 05:34:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-20 05:34:13,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-11-20 05:34:13,477 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 05:34:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 338 transitions. [2021-11-20 05:34:13,479 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 338 transitions. Word has length 47 [2021-11-20 05:34:13,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:13,480 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 338 transitions. [2021-11-20 05:34:13,480 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 05:34:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 338 transitions. [2021-11-20 05:34:13,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 05:34:13,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:13,484 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 05:34:13,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:13,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:13,706 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 05:34:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:13,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2015855482, now seen corresponding path program 1 times [2021-11-20 05:34:13,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:13,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167541627] [2021-11-20 05:34:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:13,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:13,730 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:13,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628740955] [2021-11-20 05:34:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:13,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:13,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:13,746 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:13,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:34:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:13,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:34:13,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:14,019 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 05:34:14,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:14,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:14,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167541627] [2021-11-20 05:34:14,020 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:14,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628740955] [2021-11-20 05:34:14,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628740955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:14,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:14,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:14,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151967507] [2021-11-20 05:34:14,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:14,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:14,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:14,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:14,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:14,022 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 05:34:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:14,044 INFO L93 Difference]: Finished difference Result 535 states and 674 transitions. [2021-11-20 05:34:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:14,044 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 05:34:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:14,047 INFO L225 Difference]: With dead ends: 535 [2021-11-20 05:34:14,047 INFO L226 Difference]: Without dead ends: 270 [2021-11-20 05:34:14,048 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 05:34:14,048 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 05:34:14,049 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 05:34:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-20 05:34:14,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-11-20 05:34:14,058 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 05:34:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 339 transitions. [2021-11-20 05:34:14,060 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 339 transitions. Word has length 58 [2021-11-20 05:34:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:14,061 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 339 transitions. [2021-11-20 05:34:14,061 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 05:34:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 339 transitions. [2021-11-20 05:34:14,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 05:34:14,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:14,062 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 05:34:14,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:14,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 05:34:14,277 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 05:34:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:14,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1886084804, now seen corresponding path program 1 times [2021-11-20 05:34:14,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:14,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098032603] [2021-11-20 05:34:14,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:14,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:14,308 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:14,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259163389] [2021-11-20 05:34:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:14,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:14,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:14,315 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:14,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:34:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:34:14,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:14,784 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 05:34:14,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:14,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:14,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098032603] [2021-11-20 05:34:14,786 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:14,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259163389] [2021-11-20 05:34:14,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259163389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:14,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:14,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:14,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567064087] [2021-11-20 05:34:14,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:14,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:14,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:14,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:14,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:14,790 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 05:34:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:14,936 INFO L93 Difference]: Finished difference Result 690 states and 873 transitions. [2021-11-20 05:34:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:14,936 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 05:34:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:14,939 INFO L225 Difference]: With dead ends: 690 [2021-11-20 05:34:14,939 INFO L226 Difference]: Without dead ends: 424 [2021-11-20 05:34:14,940 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 05:34:14,941 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 05:34:14,941 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 05:34:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-20 05:34:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 385. [2021-11-20 05:34:14,961 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 05:34:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 485 transitions. [2021-11-20 05:34:14,964 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 485 transitions. Word has length 58 [2021-11-20 05:34:14,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:14,966 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 485 transitions. [2021-11-20 05:34:14,966 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 05:34:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 485 transitions. [2021-11-20 05:34:14,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 05:34:14,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:14,968 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 05:34:15,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:15,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:15,181 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 05:34:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:15,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1360052348, now seen corresponding path program 1 times [2021-11-20 05:34:15,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:15,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190960823] [2021-11-20 05:34:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:15,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:15,206 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:15,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921025450] [2021-11-20 05:34:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:15,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:15,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:15,215 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:15,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:34:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:15,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:34:15,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:15,582 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 05:34:15,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:15,786 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 05:34:15,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:15,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190960823] [2021-11-20 05:34:15,787 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:15,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921025450] [2021-11-20 05:34:15,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921025450] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:15,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:34:15,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2021-11-20 05:34:15,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313189612] [2021-11-20 05:34:15,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:15,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:34:15,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:15,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:34:15,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:34:15,789 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 05:34:15,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:15,991 INFO L93 Difference]: Finished difference Result 1424 states and 1846 transitions. [2021-11-20 05:34:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:34:15,992 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 05:34:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:16,000 INFO L225 Difference]: With dead ends: 1424 [2021-11-20 05:34:16,000 INFO L226 Difference]: Without dead ends: 1088 [2021-11-20 05:34:16,002 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 05:34:16,002 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 05:34:16,003 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 05:34:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-11-20 05:34:16,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 659. [2021-11-20 05:34:16,033 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 05:34:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 840 transitions. [2021-11-20 05:34:16,038 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 840 transitions. Word has length 62 [2021-11-20 05:34:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:16,038 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 840 transitions. [2021-11-20 05:34:16,038 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 05:34:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 840 transitions. [2021-11-20 05:34:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 05:34:16,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:16,040 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 05:34:16,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:16,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:16,265 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 05:34:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:16,266 INFO L85 PathProgramCache]: Analyzing trace with hash 643772401, now seen corresponding path program 1 times [2021-11-20 05:34:16,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:16,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532185912] [2021-11-20 05:34:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:16,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:16,295 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:16,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498704116] [2021-11-20 05:34:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:16,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:16,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:16,302 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:16,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:34:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:16,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:34:16,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:16,687 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 05:34:16,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:16,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:16,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532185912] [2021-11-20 05:34:16,688 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:16,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498704116] [2021-11-20 05:34:16,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498704116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:16,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:16,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:34:16,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438089549] [2021-11-20 05:34:16,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:16,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:34:16,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:16,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:34:16,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:34:16,692 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 05:34:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:16,812 INFO L93 Difference]: Finished difference Result 1250 states and 1604 transitions. [2021-11-20 05:34:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:34:16,813 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 05:34:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:16,819 INFO L225 Difference]: With dead ends: 1250 [2021-11-20 05:34:16,819 INFO L226 Difference]: Without dead ends: 659 [2021-11-20 05:34:16,821 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 05:34:16,823 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 05:34:16,824 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 05:34:16,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-20 05:34:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2021-11-20 05:34:16,853 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 05:34:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 839 transitions. [2021-11-20 05:34:16,857 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 839 transitions. Word has length 93 [2021-11-20 05:34:16,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:16,859 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 839 transitions. [2021-11-20 05:34:16,859 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 05:34:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 839 transitions. [2021-11-20 05:34:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 05:34:16,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:16,866 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 05:34:16,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:17,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:17,080 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 05:34:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:17,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1976180910, now seen corresponding path program 1 times [2021-11-20 05:34:17,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:17,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103945413] [2021-11-20 05:34:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:17,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:17,105 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:17,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547647588] [2021-11-20 05:34:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:17,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:17,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:17,108 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:17,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:34:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:17,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:34:17,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:17,520 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 05:34:17,535 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 05:34:17,546 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 05:34:17,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:17,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:17,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103945413] [2021-11-20 05:34:17,546 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:17,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547647588] [2021-11-20 05:34:17,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547647588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:17,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:17,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:34:17,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670970490] [2021-11-20 05:34:17,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:17,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:34:17,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:17,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:34:17,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:34:17,548 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 05:34:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:17,900 INFO L93 Difference]: Finished difference Result 927 states and 1199 transitions. [2021-11-20 05:34:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:34:17,908 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 05:34:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:17,914 INFO L225 Difference]: With dead ends: 927 [2021-11-20 05:34:17,915 INFO L226 Difference]: Without dead ends: 830 [2021-11-20 05:34:17,916 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 05:34:17,917 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, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:17,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 833 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:34:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-11-20 05:34:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 663. [2021-11-20 05:34:17,948 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 05:34:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 843 transitions. [2021-11-20 05:34:17,953 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 843 transitions. Word has length 98 [2021-11-20 05:34:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:17,953 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 843 transitions. [2021-11-20 05:34:17,954 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 05:34:17,954 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 843 transitions. [2021-11-20 05:34:17,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 05:34:17,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:17,956 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 05:34:17,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:18,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:34:18,182 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 05:34:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:18,182 INFO L85 PathProgramCache]: Analyzing trace with hash -553663886, now seen corresponding path program 1 times [2021-11-20 05:34:18,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:18,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233142212] [2021-11-20 05:34:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:18,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:18,199 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:18,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910564345] [2021-11-20 05:34:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:18,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:18,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:18,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:18,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:34:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:18,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:34:18,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:18,834 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 05:34:18,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:18,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:18,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233142212] [2021-11-20 05:34:18,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:18,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910564345] [2021-11-20 05:34:18,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910564345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:18,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:18,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:34:18,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285314368] [2021-11-20 05:34:18,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:18,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:34:18,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:18,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:34:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:34:18,836 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 05:34:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:19,017 INFO L93 Difference]: Finished difference Result 1266 states and 1623 transitions. [2021-11-20 05:34:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:34:19,018 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 05:34:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:19,028 INFO L225 Difference]: With dead ends: 1266 [2021-11-20 05:34:19,028 INFO L226 Difference]: Without dead ends: 668 [2021-11-20 05:34:19,029 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 05:34:19,030 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 05:34:19,030 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 05:34:19,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-20 05:34:19,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2021-11-20 05:34:19,061 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 05:34:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 849 transitions. [2021-11-20 05:34:19,071 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 849 transitions. Word has length 110 [2021-11-20 05:34:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:19,072 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 849 transitions. [2021-11-20 05:34:19,072 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 05:34:19,072 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 849 transitions. [2021-11-20 05:34:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 05:34:19,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:19,075 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 05:34:19,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:19,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 05:34:19,289 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 05:34:19,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:19,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1849320704, now seen corresponding path program 1 times [2021-11-20 05:34:19,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:19,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474635148] [2021-11-20 05:34:19,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:19,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:19,304 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:19,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578917403] [2021-11-20 05:34:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:19,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:19,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:19,305 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:19,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:34:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:19,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 05:34:19,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:19,854 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 05:34:19,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:20,192 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 05:34:20,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:20,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474635148] [2021-11-20 05:34:20,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:20,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578917403] [2021-11-20 05:34:20,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578917403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:20,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:34:20,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-11-20 05:34:20,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164697396] [2021-11-20 05:34:20,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:20,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:34:20,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:20,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:34:20,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:34:20,194 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 05:34:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:20,514 INFO L93 Difference]: Finished difference Result 1289 states and 1655 transitions. [2021-11-20 05:34:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:34:20,515 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 05:34:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:20,520 INFO L225 Difference]: With dead ends: 1289 [2021-11-20 05:34:20,520 INFO L226 Difference]: Without dead ends: 684 [2021-11-20 05:34:20,522 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 05:34:20,522 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 37 mSDsluCounter, 2113 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 05:34:20,523 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 05:34:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-11-20 05:34:20,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 681. [2021-11-20 05:34:20,549 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 05:34:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 867 transitions. [2021-11-20 05:34:20,554 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 867 transitions. Word has length 112 [2021-11-20 05:34:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:20,554 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 867 transitions. [2021-11-20 05:34:20,555 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 05:34:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 867 transitions. [2021-11-20 05:34:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:34:20,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:20,556 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 05:34:20,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:20,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 05:34:20,769 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 05:34:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1577750638, now seen corresponding path program 2 times [2021-11-20 05:34:20,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:20,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158061308] [2021-11-20 05:34:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:20,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:20,786 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:20,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984734964] [2021-11-20 05:34:20,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:34:20,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:20,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:20,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:20,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:34:30,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:34:30,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:30,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 05:34:30,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:30,728 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 05:34:30,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:31,194 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 05:34:31,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158061308] [2021-11-20 05:34:31,194 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984734964] [2021-11-20 05:34:31,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984734964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:31,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:34:31,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2021-11-20 05:34:31,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348046958] [2021-11-20 05:34:31,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:31,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:34:31,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:34:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:34:31,197 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 05:34:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:32,327 INFO L93 Difference]: Finished difference Result 1382 states and 1772 transitions. [2021-11-20 05:34:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 05:34:32,327 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 05:34:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:32,336 INFO L225 Difference]: With dead ends: 1382 [2021-11-20 05:34:32,336 INFO L226 Difference]: Without dead ends: 699 [2021-11-20 05:34:32,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 05:34:32,340 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 05:34:32,341 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 05:34:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-20 05:34:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 687. [2021-11-20 05:34:32,375 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 05:34:32,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 873 transitions. [2021-11-20 05:34:32,379 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 873 transitions. Word has length 116 [2021-11-20 05:34:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:32,380 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 873 transitions. [2021-11-20 05:34:32,380 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 05:34:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 873 transitions. [2021-11-20 05:34:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 05:34:32,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:32,382 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 05:34:32,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:32,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:32,597 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 05:34:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash -101405335, now seen corresponding path program 3 times [2021-11-20 05:34:32,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:32,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644694167] [2021-11-20 05:34:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:32,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:32,622 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:32,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146326218] [2021-11-20 05:34:32,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:34:32,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:32,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:32,623 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:32,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6983e1fc-5b8a-4d44-acb5-2df96d0ef782/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process