./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/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_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/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 64bit --witnessprinter.graph.data.programhash 0f893dc40cf70b8d30dda6e110329e0bc2218e18bc668acf080889b069fe51ab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:06:06,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:06:06,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:06:06,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:06:06,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:06:06,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:06:06,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:06:06,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:06:06,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:06:06,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:06:06,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:06:06,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:06:06,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:06:06,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:06:06,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:06:06,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:06:06,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:06:06,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:06:06,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:06:06,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:06:06,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:06:06,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:06:06,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:06:06,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:06:06,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:06:06,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:06:06,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:06:06,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:06:06,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:06:06,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:06:06,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:06:06,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:06:06,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:06:06,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:06:06,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:06:06,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:06:06,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:06:06,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:06:06,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:06:06,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:06:06,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:06:06,200 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 07:06:06,227 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:06:06,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:06:06,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:06:06,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:06:06,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:06:06,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:06:06,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:06:06,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:06:06,231 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:06:06,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:06:06,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:06:06,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:06:06,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:06:06,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:06:06,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:06:06,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:06:06,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:06:06,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:06:06,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:06:06,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:06:06,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:06:06,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:06:06,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:06:06,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:06:06,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:06:06,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:06:06,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:06:06,236 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:06:06,236 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:06:06,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:06:06,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:06:06,237 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_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f893dc40cf70b8d30dda6e110329e0bc2218e18bc668acf080889b069fe51ab [2021-11-20 07:06:06,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:06:06,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:06:06,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:06:06,549 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:06:06,549 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:06:06,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i [2021-11-20 07:06:06,639 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/data/2292b0a4e/9c4e165cba844ef7910ac8559c3da4ba/FLAG0402c208c [2021-11-20 07:06:07,447 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:06:07,448 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i [2021-11-20 07:06:07,500 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/data/2292b0a4e/9c4e165cba844ef7910ac8559c3da4ba/FLAG0402c208c [2021-11-20 07:06:07,961 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/data/2292b0a4e/9c4e165cba844ef7910ac8559c3da4ba [2021-11-20 07:06:07,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:06:07,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:06:07,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:06:07,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:06:07,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:06:07,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:06:07" (1/1) ... [2021-11-20 07:06:07,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416a48d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:07, skipping insertion in model container [2021-11-20 07:06:07,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:06:07" (1/1) ... [2021-11-20 07:06:07,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:06:08,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:06:08,533 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_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4493,4506] [2021-11-20 07:06:08,541 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_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4553,4566] [2021-11-20 07:06:09,757 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,758 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,759 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,760 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,761 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,777 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,777 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,780 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,781 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,783 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,784 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,785 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:09,785 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:10,310 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 07:06:10,314 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 07:06:10,315 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 07:06:10,318 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 07:06:10,319 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 07:06:10,321 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 07:06:10,322 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 07:06:10,323 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 07:06:10,324 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 07:06:10,327 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 07:06:10,560 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 07:06:11,001 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,002 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,025 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,026 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,033 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,034 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,049 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,050 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,051 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,051 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,052 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,053 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,053 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:06:11,127 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:06:11,152 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_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4493,4506] [2021-11-20 07:06:11,158 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_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4553,4566] [2021-11-20 07:06:11,189 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,190 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,190 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,191 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,191 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,197 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,197 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,198 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,198 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,199 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,200 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,201 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,201 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,230 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 07:06:11,231 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 07:06:11,232 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 07:06:11,233 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 07:06:11,234 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 07:06:11,234 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 07:06:11,235 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 07:06:11,235 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 07:06:11,236 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 07:06:11,236 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 07:06:11,267 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 07:06:11,427 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,427 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,434 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,435 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,437 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,438 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,446 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,447 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,447 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,448 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,448 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,448 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,449 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:06:11,467 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:06:11,751 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:06:11,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11 WrapperNode [2021-11-20 07:06:11,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:06:11,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:06:11,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:06:11,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:06:11,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11" (1/1) ... [2021-11-20 07:06:11,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11" (1/1) ... [2021-11-20 07:06:12,043 INFO L137 Inliner]: procedures = 774, calls = 2446, calls flagged for inlining = 67, calls inlined = 11, statements flattened = 624 [2021-11-20 07:06:12,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:06:12,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:06:12,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:06:12,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:06:12,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11" (1/1) ... [2021-11-20 07:06:12,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11" (1/1) ... [2021-11-20 07:06:12,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11" (1/1) ... [2021-11-20 07:06:12,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11" (1/1) ... [2021-11-20 07:06:12,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11" (1/1) ... [2021-11-20 07:06:12,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11" (1/1) ... [2021-11-20 07:06:12,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11" (1/1) ... [2021-11-20 07:06:12,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:06:12,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:06:12,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:06:12,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:06:12,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11" (1/1) ... [2021-11-20 07:06:12,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:06:12,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:12,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:06:12,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:06:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-20 07:06:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:06:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-20 07:06:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-20 07:06:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 07:06:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 07:06:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-20 07:06:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-20 07:06:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:06:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:06:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:06:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:06:12,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:06:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 07:06:12,262 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 07:06:12,262 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-20 07:06:12,262 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-20 07:06:12,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 07:06:12,262 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 07:06:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:06:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-20 07:06:12,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-20 07:06:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:06:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 07:06:12,263 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 07:06:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:06:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-20 07:06:12,264 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-20 07:06:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:06:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_begin [2021-11-20 07:06:12,265 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_begin [2021-11-20 07:06:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-20 07:06:12,265 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-20 07:06:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure s_get_next_element [2021-11-20 07:06:12,265 INFO L138 BoogieDeclarations]: Found implementation of procedure s_get_next_element [2021-11-20 07:06:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:06:12,266 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:06:12,266 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2021-11-20 07:06:12,266 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2021-11-20 07:06:12,266 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-20 07:06:12,267 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-20 07:06:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:06:12,268 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-20 07:06:12,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-20 07:06:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-20 07:06:12,271 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-20 07:06:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:06:12,689 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:06:12,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:06:12,823 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !true; [2021-11-20 07:06:14,006 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:06:14,015 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:06:14,015 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 07:06:14,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:06:14 BoogieIcfgContainer [2021-11-20 07:06:14,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:06:14,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:06:14,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:06:14,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:06:14,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:06:07" (1/3) ... [2021-11-20 07:06:14,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2cada2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:06:14, skipping insertion in model container [2021-11-20 07:06:14,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:11" (2/3) ... [2021-11-20 07:06:14,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2cada2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:06:14, skipping insertion in model container [2021-11-20 07:06:14,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:06:14" (3/3) ... [2021-11-20 07:06:14,030 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_begin_harness.i [2021-11-20 07:06:14,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:06:14,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:06:14,099 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:06:14,114 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:06:14,115 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:06:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 114 states have (on average 1.2456140350877194) internal successors, (142), 113 states have internal predecessors, (142), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-20 07:06:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-20 07:06:14,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:14,165 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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 07:06:14,166 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:14,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1612502020, now seen corresponding path program 1 times [2021-11-20 07:06:14,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:14,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751461807] [2021-11-20 07:06:14,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:14,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:14,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:14,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:06:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:14,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:06:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:14,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:06:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:14,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:06:14,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751461807] [2021-11-20 07:06:14,896 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-20 07:06:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220282726] [2021-11-20 07:06:14,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:14,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:14,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:14,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:14,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:06:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:15,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 2386 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 07:06:15,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-20 07:06:15,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:06:15,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220282726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:15,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:06:15,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:06:15,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065909936] [2021-11-20 07:06:15,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:15,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:06:15,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:15,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:06:15,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:06:15,995 INFO L87 Difference]: Start difference. First operand has 171 states, 114 states have (on average 1.2456140350877194) internal successors, (142), 113 states have internal predecessors, (142), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 07:06:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:16,071 INFO L93 Difference]: Finished difference Result 333 states and 453 transitions. [2021-11-20 07:06:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:06:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 148 [2021-11-20 07:06:16,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:16,083 INFO L225 Difference]: With dead ends: 333 [2021-11-20 07:06:16,083 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 07:06:16,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 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 07:06:16,092 INFO L933 BasicCegarLoop]: 215 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, 215 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:16,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:06:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 07:06:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-20 07:06:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 107 states have internal predecessors, (130), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-20 07:06:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 209 transitions. [2021-11-20 07:06:16,147 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 209 transitions. Word has length 148 [2021-11-20 07:06:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:16,148 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 209 transitions. [2021-11-20 07:06:16,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 07:06:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 209 transitions. [2021-11-20 07:06:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 07:06:16,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:16,152 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:16,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:16,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 07:06:16,378 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:16,379 INFO L85 PathProgramCache]: Analyzing trace with hash 818348810, now seen corresponding path program 1 times [2021-11-20 07:06:16,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:16,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968471803] [2021-11-20 07:06:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:16,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:16,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:16,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156723723] [2021-11-20 07:06:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:16,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:16,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:16,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:06:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 2414 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:06:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 07:06:17,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-20 07:06:18,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:18,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968471803] [2021-11-20 07:06:18,020 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:18,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156723723] [2021-11-20 07:06:18,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156723723] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:18,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:06:18,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-20 07:06:18,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490930188] [2021-11-20 07:06:18,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:18,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:06:18,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:18,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:06:18,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:06:18,030 INFO L87 Difference]: Start difference. First operand 164 states and 209 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 07:06:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:18,399 INFO L93 Difference]: Finished difference Result 230 states and 298 transitions. [2021-11-20 07:06:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:06:18,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 154 [2021-11-20 07:06:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:18,406 INFO L225 Difference]: With dead ends: 230 [2021-11-20 07:06:18,406 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 07:06:18,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:06:18,410 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 212 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:18,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 827 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:06:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 07:06:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-11-20 07:06:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 109 states have internal predecessors, (131), 40 states have call successors, (40), 17 states have call predecessors, (40), 18 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2021-11-20 07:06:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 211 transitions. [2021-11-20 07:06:18,446 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 211 transitions. Word has length 154 [2021-11-20 07:06:18,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:18,449 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 211 transitions. [2021-11-20 07:06:18,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 07:06:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 211 transitions. [2021-11-20 07:06:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 07:06:18,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:18,461 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:18,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:18,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:18,678 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:18,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:18,678 INFO L85 PathProgramCache]: Analyzing trace with hash -226987588, now seen corresponding path program 1 times [2021-11-20 07:06:18,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:18,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811009076] [2021-11-20 07:06:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:18,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:18,766 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:18,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445624343] [2021-11-20 07:06:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:18,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:18,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:18,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:18,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:06:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:19,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2419 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:06:19,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-20 07:06:19,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:06:19,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:19,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811009076] [2021-11-20 07:06:19,647 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:19,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445624343] [2021-11-20 07:06:19,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445624343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:19,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:06:19,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:06:19,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037884828] [2021-11-20 07:06:19,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:19,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:06:19,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:19,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:06:19,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:06:19,651 INFO L87 Difference]: Start difference. First operand 166 states and 211 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 07:06:19,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:19,699 INFO L93 Difference]: Finished difference Result 325 states and 414 transitions. [2021-11-20 07:06:19,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:06:19,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 155 [2021-11-20 07:06:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:19,706 INFO L225 Difference]: With dead ends: 325 [2021-11-20 07:06:19,707 INFO L226 Difference]: Without dead ends: 171 [2021-11-20 07:06:19,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:06:19,714 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 2 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:19,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 820 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:06:19,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-20 07:06:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-20 07:06:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 40 states have call successors, (40), 17 states have call predecessors, (40), 19 states have return successors, (41), 40 states have call predecessors, (41), 39 states have call successors, (41) [2021-11-20 07:06:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 216 transitions. [2021-11-20 07:06:19,751 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 216 transitions. Word has length 155 [2021-11-20 07:06:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:19,752 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 216 transitions. [2021-11-20 07:06:19,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 07:06:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 216 transitions. [2021-11-20 07:06:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 07:06:19,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:19,756 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:19,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:19,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:19,970 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:19,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1170775228, now seen corresponding path program 1 times [2021-11-20 07:06:19,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:19,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364336057] [2021-11-20 07:06:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:19,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:06:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:06:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:06:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:06:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:06:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:06:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:06:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:06:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:06:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 07:06:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 07:06:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-20 07:06:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-20 07:06:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-20 07:06:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 07:06:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-20 07:06:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-20 07:06:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-20 07:06:20,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:20,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364336057] [2021-11-20 07:06:20,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364336057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:20,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455892321] [2021-11-20 07:06:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:20,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:20,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:20,902 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:20,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:06:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:21,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 2451 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 07:06:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:21,757 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 16 treesize of output 12 [2021-11-20 07:06:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 07:06:22,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:06:22,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455892321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:22,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:06:22,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 22 [2021-11-20 07:06:22,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82630403] [2021-11-20 07:06:22,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:22,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:06:22,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:06:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:06:22,288 INFO L87 Difference]: Start difference. First operand 171 states and 216 transitions. Second operand has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-20 07:06:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:22,466 INFO L93 Difference]: Finished difference Result 330 states and 416 transitions. [2021-11-20 07:06:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:06:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 167 [2021-11-20 07:06:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:22,469 INFO L225 Difference]: With dead ends: 330 [2021-11-20 07:06:22,469 INFO L226 Difference]: Without dead ends: 180 [2021-11-20 07:06:22,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:06:22,471 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 12 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:22,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1688 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2021-11-20 07:06:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-20 07:06:22,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-11-20 07:06:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 119 states have (on average 1.218487394957983) internal successors, (145), 121 states have internal predecessors, (145), 40 states have call successors, (40), 18 states have call predecessors, (40), 20 states have return successors, (42), 40 states have call predecessors, (42), 39 states have call successors, (42) [2021-11-20 07:06:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 227 transitions. [2021-11-20 07:06:22,487 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 227 transitions. Word has length 167 [2021-11-20 07:06:22,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:22,488 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 227 transitions. [2021-11-20 07:06:22,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-20 07:06:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 227 transitions. [2021-11-20 07:06:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 07:06:22,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:22,491 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:22,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:22,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:22,706 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:22,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash -695933446, now seen corresponding path program 1 times [2021-11-20 07:06:22,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:22,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927698362] [2021-11-20 07:06:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:22,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:22,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:22,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:06:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:22,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:06:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:22,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:06:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:22,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:06:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:22,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:22,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:22,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:06:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:06:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:06:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:06:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:06:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 07:06:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 07:06:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-20 07:06:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-20 07:06:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-20 07:06:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 07:06:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-20 07:06:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-20 07:06:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-20 07:06:23,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:23,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927698362] [2021-11-20 07:06:23,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927698362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:23,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295740579] [2021-11-20 07:06:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:23,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:23,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:23,262 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:23,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:06:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:23,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:06:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 07:06:24,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:06:24,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295740579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:24,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:06:24,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-11-20 07:06:24,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121588166] [2021-11-20 07:06:24,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:24,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:06:24,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:24,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:06:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:06:24,165 INFO L87 Difference]: Start difference. First operand 180 states and 227 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-20 07:06:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:24,337 INFO L93 Difference]: Finished difference Result 334 states and 425 transitions. [2021-11-20 07:06:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:06:24,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 167 [2021-11-20 07:06:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:24,340 INFO L225 Difference]: With dead ends: 334 [2021-11-20 07:06:24,340 INFO L226 Difference]: Without dead ends: 182 [2021-11-20 07:06:24,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:06:24,342 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 217 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:24,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 519 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:06:24,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-20 07:06:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-11-20 07:06:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 120 states have (on average 1.2083333333333333) internal successors, (145), 122 states have internal predecessors, (145), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (45), 41 states have call predecessors, (45), 40 states have call successors, (45) [2021-11-20 07:06:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 231 transitions. [2021-11-20 07:06:24,364 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 231 transitions. Word has length 167 [2021-11-20 07:06:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:24,365 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 231 transitions. [2021-11-20 07:06:24,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-20 07:06:24,366 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 231 transitions. [2021-11-20 07:06:24,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-20 07:06:24,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:24,369 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:24,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:24,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:24,586 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:24,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1022744148, now seen corresponding path program 1 times [2021-11-20 07:06:24,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:24,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469257894] [2021-11-20 07:06:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:24,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:06:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:06:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:06:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:06:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:06:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:06:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:06:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:24,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:06:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:06:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:06:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 07:06:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-20 07:06:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-20 07:06:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-20 07:06:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 07:06:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-20 07:06:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-20 07:06:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-20 07:06:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-20 07:06:25,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:25,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469257894] [2021-11-20 07:06:25,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469257894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:25,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454855193] [2021-11-20 07:06:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:25,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:25,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:25,192 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:25,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:06:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:25,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 2475 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 07:06:25,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:27,093 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((aws_hash_table_is_valid_~map.base Int) (aws_hash_table_is_valid_~map.offset Int)) (not (= 0 (select (select |c_#memory_$Pointer$.offset| aws_hash_table_is_valid_~map.base) aws_hash_table_is_valid_~map.offset)))) (exists ((aws_hash_table_is_valid_~map.base Int) (aws_hash_table_is_valid_~map.offset Int)) (not (= (select (select |c_#memory_$Pointer$.base| aws_hash_table_is_valid_~map.base) aws_hash_table_is_valid_~map.offset) 0)))) is different from true [2021-11-20 07:06:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 07:06:35,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:06:35,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454855193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:35,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:06:35,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-11-20 07:06:35,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177691797] [2021-11-20 07:06:35,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:35,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:06:35,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:06:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=202, Unknown=3, NotChecked=28, Total=272 [2021-11-20 07:06:35,728 INFO L87 Difference]: Start difference. First operand 182 states and 231 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-20 07:06:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:35,974 INFO L93 Difference]: Finished difference Result 341 states and 443 transitions. [2021-11-20 07:06:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:06:35,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) Word has length 173 [2021-11-20 07:06:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:35,977 INFO L225 Difference]: With dead ends: 341 [2021-11-20 07:06:35,977 INFO L226 Difference]: Without dead ends: 185 [2021-11-20 07:06:35,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=54, Invalid=253, Unknown=3, NotChecked=32, Total=342 [2021-11-20 07:06:35,979 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 5 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:35,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1107 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 313 Unchecked, 0.2s Time] [2021-11-20 07:06:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-20 07:06:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-11-20 07:06:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 122 states have (on average 1.2049180327868851) internal successors, (147), 123 states have internal predecessors, (147), 41 states have call successors, (41), 19 states have call predecessors, (41), 20 states have return successors, (45), 41 states have call predecessors, (45), 40 states have call successors, (45) [2021-11-20 07:06:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 233 transitions. [2021-11-20 07:06:36,006 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 233 transitions. Word has length 173 [2021-11-20 07:06:36,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:36,007 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 233 transitions. [2021-11-20 07:06:36,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-20 07:06:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 233 transitions. [2021-11-20 07:06:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-20 07:06:36,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:36,010 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:36,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 07:06:36,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:36,218 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:36,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash -183837512, now seen corresponding path program 1 times [2021-11-20 07:06:36,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:36,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224487416] [2021-11-20 07:06:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:36,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:06:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:06:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:06:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:06:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:06:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:06:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:06:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:06:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:06:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:06:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 07:06:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 07:06:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-20 07:06:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-20 07:06:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-20 07:06:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:36,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-20 07:06:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:37,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-20 07:06:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:37,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-11-20 07:06:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-20 07:06:37,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:37,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224487416] [2021-11-20 07:06:37,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224487416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:37,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527463561] [2021-11-20 07:06:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:37,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:37,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:37,033 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:37,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:06:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 2505 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 07:06:37,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:37,813 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 16 treesize of output 12 [2021-11-20 07:06:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 07:06:38,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:39,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527463561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:39,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:06:39,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-11-20 07:06:39,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476377530] [2021-11-20 07:06:39,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:39,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:06:39,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:06:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:06:39,225 INFO L87 Difference]: Start difference. First operand 184 states and 233 transitions. Second operand has 28 states, 25 states have (on average 5.72) internal successors, (143), 20 states have internal predecessors, (143), 11 states have call successors, (57), 10 states have call predecessors, (57), 7 states have return successors, (47), 10 states have call predecessors, (47), 11 states have call successors, (47) [2021-11-20 07:06:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:41,141 INFO L93 Difference]: Finished difference Result 366 states and 470 transitions. [2021-11-20 07:06:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:06:41,142 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 5.72) internal successors, (143), 20 states have internal predecessors, (143), 11 states have call successors, (57), 10 states have call predecessors, (57), 7 states have return successors, (47), 10 states have call predecessors, (47), 11 states have call successors, (47) Word has length 178 [2021-11-20 07:06:41,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:41,144 INFO L225 Difference]: With dead ends: 366 [2021-11-20 07:06:41,144 INFO L226 Difference]: Without dead ends: 262 [2021-11-20 07:06:41,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 289 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 07:06:41,147 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 235 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 656 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:41,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1467 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1601 Invalid, 0 Unknown, 656 Unchecked, 1.6s Time] [2021-11-20 07:06:41,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-20 07:06:41,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 232. [2021-11-20 07:06:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 155 states have (on average 1.1935483870967742) internal successors, (185), 159 states have internal predecessors, (185), 48 states have call successors, (48), 25 states have call predecessors, (48), 28 states have return successors, (58), 47 states have call predecessors, (58), 47 states have call successors, (58) [2021-11-20 07:06:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 291 transitions. [2021-11-20 07:06:41,168 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 291 transitions. Word has length 178 [2021-11-20 07:06:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:41,168 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 291 transitions. [2021-11-20 07:06:41,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 5.72) internal successors, (143), 20 states have internal predecessors, (143), 11 states have call successors, (57), 10 states have call predecessors, (57), 7 states have return successors, (47), 10 states have call predecessors, (47), 11 states have call successors, (47) [2021-11-20 07:06:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 291 transitions. [2021-11-20 07:06:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-20 07:06:41,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:41,172 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:41,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:41,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:06:41,398 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash 692181494, now seen corresponding path program 1 times [2021-11-20 07:06:41,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434652107] [2021-11-20 07:06:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:41,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:06:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:06:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:06:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:06:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:06:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:06:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:06:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:06:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:06:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:06:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 07:06:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 07:06:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-20 07:06:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-20 07:06:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-20 07:06:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-20 07:06:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-20 07:06:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-11-20 07:06:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-20 07:06:42,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:42,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434652107] [2021-11-20 07:06:42,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434652107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:42,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538686237] [2021-11-20 07:06:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:42,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:42,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:42,334 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:42,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:06:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:06:42,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-20 07:06:43,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:06:43,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538686237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:43,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:06:43,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 20 [2021-11-20 07:06:43,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113479558] [2021-11-20 07:06:43,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:43,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:06:43,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:43,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:06:43,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:06:43,257 INFO L87 Difference]: Start difference. First operand 232 states and 291 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 3 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-20 07:06:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:43,499 INFO L93 Difference]: Finished difference Result 335 states and 426 transitions. [2021-11-20 07:06:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:06:43,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 3 states have call predecessors, (24), 4 states have call successors, (24) Word has length 178 [2021-11-20 07:06:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:43,502 INFO L225 Difference]: With dead ends: 335 [2021-11-20 07:06:43,502 INFO L226 Difference]: Without dead ends: 223 [2021-11-20 07:06:43,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-11-20 07:06:43,504 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 226 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:43,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 834 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:06:43,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-20 07:06:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2021-11-20 07:06:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 151 states have internal predecessors, (173), 47 states have call successors, (47), 23 states have call predecessors, (47), 27 states have return successors, (55), 46 states have call predecessors, (55), 46 states have call successors, (55) [2021-11-20 07:06:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 275 transitions. [2021-11-20 07:06:43,523 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 275 transitions. Word has length 178 [2021-11-20 07:06:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:43,524 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 275 transitions. [2021-11-20 07:06:43,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 3 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-20 07:06:43,525 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 275 transitions. [2021-11-20 07:06:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-20 07:06:43,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:43,529 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:43,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:43,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 07:06:43,758 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:43,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:43,758 INFO L85 PathProgramCache]: Analyzing trace with hash 657121643, now seen corresponding path program 1 times [2021-11-20 07:06:43,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:43,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518551275] [2021-11-20 07:06:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:43,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:43,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:43,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295583787] [2021-11-20 07:06:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:43,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:43,821 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:43,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:06:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:44,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 2582 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 07:06:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:44,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:44,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-20 07:06:44,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:06:45,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:45,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:45,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:45,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:45,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:45,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:45,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:45,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:45,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:45,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-11-20 07:06:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-20 07:06:45,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:45,792 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 8 treesize of output 4 [2021-11-20 07:06:45,877 INFO L354 Elim1Store]: treesize reduction 28, result has 22.2 percent of original size [2021-11-20 07:06:45,877 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 1 case distinctions, treesize of input 31 treesize of output 16 [2021-11-20 07:06:45,879 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 16 treesize of output 8 [2021-11-20 07:06:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-20 07:06:46,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:46,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518551275] [2021-11-20 07:06:46,236 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:46,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295583787] [2021-11-20 07:06:46,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295583787] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:46,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:06:46,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [20] total 30 [2021-11-20 07:06:46,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911639739] [2021-11-20 07:06:46,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:46,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:06:46,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:06:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:06:46,239 INFO L87 Difference]: Start difference. First operand 221 states and 275 transitions. Second operand has 15 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 states have internal predecessors, (86), 8 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-20 07:06:46,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:46,874 INFO L93 Difference]: Finished difference Result 314 states and 403 transitions. [2021-11-20 07:06:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:06:46,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 states have internal predecessors, (86), 8 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 184 [2021-11-20 07:06:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:46,878 INFO L225 Difference]: With dead ends: 314 [2021-11-20 07:06:46,878 INFO L226 Difference]: Without dead ends: 237 [2021-11-20 07:06:46,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 335 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 07:06:46,880 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 41 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2091 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:46,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 2091 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 281 Invalid, 0 Unknown, 100 Unchecked, 0.5s Time] [2021-11-20 07:06:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-20 07:06:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2021-11-20 07:06:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 154 states have (on average 1.1883116883116882) internal successors, (183), 161 states have internal predecessors, (183), 49 states have call successors, (49), 23 states have call predecessors, (49), 29 states have return successors, (64), 48 states have call predecessors, (64), 48 states have call successors, (64) [2021-11-20 07:06:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 296 transitions. [2021-11-20 07:06:46,901 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 296 transitions. Word has length 184 [2021-11-20 07:06:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:46,902 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 296 transitions. [2021-11-20 07:06:46,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 states have internal predecessors, (86), 8 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-20 07:06:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 296 transitions. [2021-11-20 07:06:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-20 07:06:46,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:46,906 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:46,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:47,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:47,122 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:47,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:47,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1828296941, now seen corresponding path program 1 times [2021-11-20 07:06:47,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:47,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210667723] [2021-11-20 07:06:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:47,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:06:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:06:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:06:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:06:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:06:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:06:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:06:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:06:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:06:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:06:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:06:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-20 07:06:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 07:06:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 07:06:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 07:06:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-20 07:06:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:47,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-11-20 07:06:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:48,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-11-20 07:06:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:48,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-11-20 07:06:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-20 07:06:48,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:48,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210667723] [2021-11-20 07:06:48,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210667723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:48,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340392462] [2021-11-20 07:06:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:48,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:48,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:48,032 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:48,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:06:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:48,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 2593 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:06:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-20 07:06:48,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:06:48,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340392462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:48,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:06:48,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 23 [2021-11-20 07:06:48,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045902366] [2021-11-20 07:06:48,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:48,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:06:48,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:06:48,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:06:48,941 INFO L87 Difference]: Start difference. First operand 233 states and 296 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 07:06:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:48,989 INFO L93 Difference]: Finished difference Result 451 states and 573 transitions. [2021-11-20 07:06:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:06:48,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) Word has length 190 [2021-11-20 07:06:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:48,994 INFO L225 Difference]: With dead ends: 451 [2021-11-20 07:06:48,995 INFO L226 Difference]: Without dead ends: 230 [2021-11-20 07:06:48,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:06:48,998 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 2 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:48,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1241 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:06:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-20 07:06:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2021-11-20 07:06:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 150 states have (on average 1.18) internal successors, (177), 156 states have internal predecessors, (177), 48 states have call successors, (48), 23 states have call predecessors, (48), 28 states have return successors, (61), 47 states have call predecessors, (61), 47 states have call successors, (61) [2021-11-20 07:06:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2021-11-20 07:06:49,025 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 190 [2021-11-20 07:06:49,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:49,028 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2021-11-20 07:06:49,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 07:06:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2021-11-20 07:06:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-20 07:06:49,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:49,032 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:49,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:49,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:06:49,250 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:49,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:49,250 INFO L85 PathProgramCache]: Analyzing trace with hash 523108137, now seen corresponding path program 1 times [2021-11-20 07:06:49,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:49,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331164628] [2021-11-20 07:06:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:49,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:49,308 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:49,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718208200] [2021-11-20 07:06:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:49,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:49,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:49,310 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:49,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:06:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 2577 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:06:49,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:50,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:50,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 11 [2021-11-20 07:06:50,298 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 07:06:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-20 07:06:50,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:06:50,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:50,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331164628] [2021-11-20 07:06:50,448 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:50,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718208200] [2021-11-20 07:06:50,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718208200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:50,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:06:50,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 07:06:50,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994854997] [2021-11-20 07:06:50,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:50,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:06:50,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:50,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:06:50,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:06:50,450 INFO L87 Difference]: Start difference. First operand 227 states and 286 transitions. Second operand has 14 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 8 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (26), 6 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-20 07:06:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:50,824 INFO L93 Difference]: Finished difference Result 386 states and 483 transitions. [2021-11-20 07:06:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:06:50,825 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 8 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (26), 6 states have call predecessors, (26), 7 states have call successors, (26) Word has length 184 [2021-11-20 07:06:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:50,827 INFO L225 Difference]: With dead ends: 386 [2021-11-20 07:06:50,827 INFO L226 Difference]: Without dead ends: 291 [2021-11-20 07:06:50,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-20 07:06:50,829 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 221 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:50,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 1431 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 246 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2021-11-20 07:06:50,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-20 07:06:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 284. [2021-11-20 07:06:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 194 states have (on average 1.2061855670103092) internal successors, (234), 201 states have internal predecessors, (234), 52 states have call successors, (52), 31 states have call predecessors, (52), 37 states have return successors, (62), 51 states have call predecessors, (62), 51 states have call successors, (62) [2021-11-20 07:06:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 348 transitions. [2021-11-20 07:06:50,853 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 348 transitions. Word has length 184 [2021-11-20 07:06:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:50,854 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 348 transitions. [2021-11-20 07:06:50,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 8 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (26), 6 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-20 07:06:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 348 transitions. [2021-11-20 07:06:50,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 07:06:50,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:50,858 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:50,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:51,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:51,082 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:51,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1394290473, now seen corresponding path program 1 times [2021-11-20 07:06:51,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:51,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698699880] [2021-11-20 07:06:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:51,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:06:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:06:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:06:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:06:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:06:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:06:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:06:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:06:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:06:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:06:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 07:06:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 07:06:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:06:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 07:06:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-20 07:06:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-20 07:06:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:06:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 07:06:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-20 07:06:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-20 07:06:51,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:51,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698699880] [2021-11-20 07:06:51,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698699880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:51,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:06:51,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-20 07:06:51,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770566787] [2021-11-20 07:06:51,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:51,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:06:51,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:51,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:06:51,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:06:51,953 INFO L87 Difference]: Start difference. First operand 284 states and 348 transitions. Second operand has 20 states, 17 states have (on average 4.588235294117647) internal successors, (78), 14 states have internal predecessors, (78), 9 states have call successors, (27), 7 states have call predecessors, (27), 4 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 07:06:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:54,332 INFO L93 Difference]: Finished difference Result 371 states and 461 transitions. [2021-11-20 07:06:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:06:54,333 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.588235294117647) internal successors, (78), 14 states have internal predecessors, (78), 9 states have call successors, (27), 7 states have call predecessors, (27), 4 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) Word has length 193 [2021-11-20 07:06:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:54,335 INFO L225 Difference]: With dead ends: 371 [2021-11-20 07:06:54,335 INFO L226 Difference]: Without dead ends: 299 [2021-11-20 07:06:54,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 07:06:54,337 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 337 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:54,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 1085 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 07:06:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-20 07:06:54,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 284. [2021-11-20 07:06:54,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 194 states have (on average 1.2061855670103092) internal successors, (234), 201 states have internal predecessors, (234), 52 states have call successors, (52), 31 states have call predecessors, (52), 37 states have return successors, (62), 51 states have call predecessors, (62), 51 states have call successors, (62) [2021-11-20 07:06:54,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 348 transitions. [2021-11-20 07:06:54,359 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 348 transitions. Word has length 193 [2021-11-20 07:06:54,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:54,360 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 348 transitions. [2021-11-20 07:06:54,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.588235294117647) internal successors, (78), 14 states have internal predecessors, (78), 9 states have call successors, (27), 7 states have call predecessors, (27), 4 states have return successors, (25), 7 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 07:06:54,360 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 348 transitions. [2021-11-20 07:06:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-20 07:06:54,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:54,364 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:54,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:06:54,364 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash 476694279, now seen corresponding path program 1 times [2021-11-20 07:06:54,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:54,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770600239] [2021-11-20 07:06:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:54,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:54,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:54,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:06:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:54,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:06:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:54,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:06:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:06:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:06:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:06:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:06:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:06:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:06:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:06:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 07:06:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 07:06:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:06:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 07:06:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-20 07:06:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-20 07:06:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-20 07:06:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-20 07:06:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-20 07:06:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:06:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-20 07:06:55,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:55,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770600239] [2021-11-20 07:06:55,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770600239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:55,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898306550] [2021-11-20 07:06:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:55,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:55,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:55,670 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:55,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:06:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:56,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 2586 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:06:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-20 07:06:56,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:06:56,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898306550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:56,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:06:56,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [25] total 30 [2021-11-20 07:06:56,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469174714] [2021-11-20 07:06:56,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:56,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:06:56,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:56,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:06:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:06:56,545 INFO L87 Difference]: Start difference. First operand 284 states and 348 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-20 07:06:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:56,670 INFO L93 Difference]: Finished difference Result 424 states and 525 transitions. [2021-11-20 07:06:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:06:56,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 198 [2021-11-20 07:06:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:56,674 INFO L225 Difference]: With dead ends: 424 [2021-11-20 07:06:56,674 INFO L226 Difference]: Without dead ends: 286 [2021-11-20 07:06:56,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:06:56,676 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 2 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:56,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1162 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:06:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-20 07:06:56,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 272. [2021-11-20 07:06:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.2043010752688172) internal successors, (224), 191 states have internal predecessors, (224), 50 states have call successors, (50), 31 states have call predecessors, (50), 35 states have return successors, (57), 49 states have call predecessors, (57), 49 states have call successors, (57) [2021-11-20 07:06:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 331 transitions. [2021-11-20 07:06:56,699 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 331 transitions. Word has length 198 [2021-11-20 07:06:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:56,700 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 331 transitions. [2021-11-20 07:06:56,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-20 07:06:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 331 transitions. [2021-11-20 07:06:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-20 07:06:56,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:56,704 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:56,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:56,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:06:56,930 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:56,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:56,930 INFO L85 PathProgramCache]: Analyzing trace with hash 608324923, now seen corresponding path program 2 times [2021-11-20 07:06:56,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:56,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993769995] [2021-11-20 07:06:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:56,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:56,991 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:56,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955976024] [2021-11-20 07:06:56,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:06:56,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:56,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:56,995 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:57,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:06:57,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:06:57,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:57,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:06:57,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 07:06:58,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:06:58,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:58,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993769995] [2021-11-20 07:06:58,057 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:58,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955976024] [2021-11-20 07:06:58,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955976024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:58,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:06:58,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:06:58,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384519062] [2021-11-20 07:06:58,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:58,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:06:58,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:06:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:06:58,059 INFO L87 Difference]: Start difference. First operand 272 states and 331 transitions. Second operand has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 07:06:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:58,171 INFO L93 Difference]: Finished difference Result 437 states and 539 transitions. [2021-11-20 07:06:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:06:58,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 195 [2021-11-20 07:06:58,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:58,174 INFO L225 Difference]: With dead ends: 437 [2021-11-20 07:06:58,174 INFO L226 Difference]: Without dead ends: 281 [2021-11-20 07:06:58,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:06:58,175 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 2 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:58,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1162 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:06:58,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-20 07:06:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 275. [2021-11-20 07:06:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 188 states have (on average 1.202127659574468) internal successors, (226), 194 states have internal predecessors, (226), 50 states have call successors, (50), 31 states have call predecessors, (50), 36 states have return successors, (59), 49 states have call predecessors, (59), 49 states have call successors, (59) [2021-11-20 07:06:58,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 335 transitions. [2021-11-20 07:06:58,194 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 335 transitions. Word has length 195 [2021-11-20 07:06:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:58,195 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 335 transitions. [2021-11-20 07:06:58,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 07:06:58,195 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 335 transitions. [2021-11-20 07:06:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-20 07:06:58,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:58,197 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-11-20 07:06:58,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:58,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:06:58,412 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash 450820696, now seen corresponding path program 1 times [2021-11-20 07:06:58,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:58,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551579824] [2021-11-20 07:06:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:58,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:06:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:06:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:06:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:06:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:06:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:06:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:58,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:06:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:06:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:06:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:06:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:06:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:06:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 07:06:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 07:06:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:06:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 07:06:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-20 07:06:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-20 07:06:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-20 07:06:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:06:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:06:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-20 07:06:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-11-20 07:06:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-20 07:06:59,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:59,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551579824] [2021-11-20 07:06:59,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551579824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:59,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451155767] [2021-11-20 07:06:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:59,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:59,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:59,354 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:59,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:06:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 07:06:59,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:00,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:00,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 12 [2021-11-20 07:07:00,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:00,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:00,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:00,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:00,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:00,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:00,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:00,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:00,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-11-20 07:07:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 87 proven. 16 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-11-20 07:07:01,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:01,306 INFO L354 Elim1Store]: treesize reduction 28, result has 22.2 percent of original size [2021-11-20 07:07:01,306 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 1 case distinctions, treesize of input 32 treesize of output 17 [2021-11-20 07:07:01,311 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 17 treesize of output 9 [2021-11-20 07:07:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-20 07:07:01,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451155767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:07:01,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:07:01,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 14] total 32 [2021-11-20 07:07:01,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369453815] [2021-11-20 07:07:01,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:01,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 07:07:01,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 07:07:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:07:01,799 INFO L87 Difference]: Start difference. First operand 275 states and 335 transitions. Second operand has 32 states, 29 states have (on average 4.241379310344827) internal successors, (123), 24 states have internal predecessors, (123), 14 states have call successors, (51), 11 states have call predecessors, (51), 5 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2021-11-20 07:07:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:04,129 INFO L93 Difference]: Finished difference Result 415 states and 508 transitions. [2021-11-20 07:07:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 07:07:04,130 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.241379310344827) internal successors, (123), 24 states have internal predecessors, (123), 14 states have call successors, (51), 11 states have call predecessors, (51), 5 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) Word has length 200 [2021-11-20 07:07:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:04,132 INFO L225 Difference]: With dead ends: 415 [2021-11-20 07:07:04,133 INFO L226 Difference]: Without dead ends: 324 [2021-11-20 07:07:04,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 444 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=2747, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 07:07:04,135 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 282 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 1925 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1836 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:04,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 1836 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1925 Invalid, 0 Unknown, 467 Unchecked, 1.7s Time] [2021-11-20 07:07:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-20 07:07:04,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2021-11-20 07:07:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 200 states have (on average 1.19) internal successors, (238), 205 states have internal predecessors, (238), 52 states have call successors, (52), 35 states have call predecessors, (52), 38 states have return successors, (60), 50 states have call predecessors, (60), 51 states have call successors, (60) [2021-11-20 07:07:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 350 transitions. [2021-11-20 07:07:04,156 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 350 transitions. Word has length 200 [2021-11-20 07:07:04,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:04,157 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 350 transitions. [2021-11-20 07:07:04,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.241379310344827) internal successors, (123), 24 states have internal predecessors, (123), 14 states have call successors, (51), 11 states have call predecessors, (51), 5 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2021-11-20 07:07:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 350 transitions. [2021-11-20 07:07:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-20 07:07:04,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:04,159 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:04,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:04,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:07:04,382 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:04,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1734404003, now seen corresponding path program 2 times [2021-11-20 07:07:04,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:04,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839579871] [2021-11-20 07:07:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:04,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:04,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:04,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 07:07:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:04,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:07:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:04,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:07:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:07:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:07:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:07:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 07:07:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 07:07:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:07:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 07:07:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 07:07:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:07:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 07:07:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 07:07:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:07:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 07:07:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-20 07:07:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-20 07:07:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-20 07:07:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:07:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-20 07:07:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-11-20 07:07:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:07:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-11-20 07:07:05,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:05,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839579871] [2021-11-20 07:07:05,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839579871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:05,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392329056] [2021-11-20 07:07:05,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:07:05,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:05,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:05,758 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:05,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:07:06,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:07:06,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:07:06,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 2640 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:07:06,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-20 07:07:06,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:06,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392329056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:06,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:06,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [30] total 34 [2021-11-20 07:07:06,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484075480] [2021-11-20 07:07:06,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:06,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:07:06,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:06,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:07:06,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:07:06,883 INFO L87 Difference]: Start difference. First operand 291 states and 350 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 07:07:07,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:07,008 INFO L93 Difference]: Finished difference Result 572 states and 686 transitions. [2021-11-20 07:07:07,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:07:07,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 209 [2021-11-20 07:07:07,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:07,011 INFO L225 Difference]: With dead ends: 572 [2021-11-20 07:07:07,011 INFO L226 Difference]: Without dead ends: 293 [2021-11-20 07:07:07,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 07:07:07,013 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 2 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:07,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 956 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:07:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-20 07:07:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-11-20 07:07:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 201 states have (on average 1.1890547263681592) internal successors, (239), 207 states have internal predecessors, (239), 52 states have call successors, (52), 35 states have call predecessors, (52), 39 states have return successors, (60), 50 states have call predecessors, (60), 51 states have call successors, (60) [2021-11-20 07:07:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 351 transitions. [2021-11-20 07:07:07,033 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 351 transitions. Word has length 209 [2021-11-20 07:07:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:07,034 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 351 transitions. [2021-11-20 07:07:07,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 07:07:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 351 transitions. [2021-11-20 07:07:07,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-20 07:07:07,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:07,036 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:07,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:07,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:07:07,262 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1271160118, now seen corresponding path program 1 times [2021-11-20 07:07:07,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:07,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570296325] [2021-11-20 07:07:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:07,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:07,328 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:07,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546913155] [2021-11-20 07:07:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:07,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:07,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:07,339 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:07,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:07:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:07,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:07:07,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-20 07:07:08,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:08,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:08,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570296325] [2021-11-20 07:07:08,138 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:08,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546913155] [2021-11-20 07:07:08,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546913155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:08,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:08,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:07:08,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321520937] [2021-11-20 07:07:08,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:08,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:07:08,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:07:08,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:07:08,141 INFO L87 Difference]: Start difference. First operand 293 states and 351 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-20 07:07:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:08,233 INFO L93 Difference]: Finished difference Result 502 states and 603 transitions. [2021-11-20 07:07:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:07:08,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 215 [2021-11-20 07:07:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:08,237 INFO L225 Difference]: With dead ends: 502 [2021-11-20 07:07:08,237 INFO L226 Difference]: Without dead ends: 273 [2021-11-20 07:07:08,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:07:08,238 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 2 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:08,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 956 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:07:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-20 07:07:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-11-20 07:07:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 188 states have (on average 1.1861702127659575) internal successors, (223), 192 states have internal predecessors, (223), 48 states have call successors, (48), 34 states have call predecessors, (48), 36 states have return successors, (53), 46 states have call predecessors, (53), 47 states have call successors, (53) [2021-11-20 07:07:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 324 transitions. [2021-11-20 07:07:08,257 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 324 transitions. Word has length 215 [2021-11-20 07:07:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:08,257 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 324 transitions. [2021-11-20 07:07:08,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-20 07:07:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 324 transitions. [2021-11-20 07:07:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-20 07:07:08,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:08,260 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:08,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:08,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:07:08,479 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:08,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:08,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1244691977, now seen corresponding path program 1 times [2021-11-20 07:07:08,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:08,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674055027] [2021-11-20 07:07:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:08,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:08,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:08,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878251131] [2021-11-20 07:07:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:08,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:08,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:08,522 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:08,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:07:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:08,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 2794 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-20 07:07:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:09,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:09,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-20 07:07:09,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:09,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-20 07:07:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,452 INFO L354 Elim1Store]: treesize reduction 277, result has 3.8 percent of original size [2021-11-20 07:07:11,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 124 [2021-11-20 07:07:11,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,484 INFO L354 Elim1Store]: treesize reduction 180, result has 5.8 percent of original size [2021-11-20 07:07:11,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 101 [2021-11-20 07:07:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:11,511 INFO L354 Elim1Store]: treesize reduction 99, result has 10.0 percent of original size [2021-11-20 07:07:11,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 96 treesize of output 88 [2021-11-20 07:07:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 115 proven. 5 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-20 07:07:13,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:20,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:20,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674055027] [2021-11-20 07:07:20,448 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:20,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878251131] [2021-11-20 07:07:20,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878251131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:20,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:20,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-20 07:07:20,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542295259] [2021-11-20 07:07:20,449 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:20,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 07:07:20,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:20,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 07:07:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1244, Unknown=5, NotChecked=0, Total=1406 [2021-11-20 07:07:20,450 INFO L87 Difference]: Start difference. First operand 273 states and 324 transitions. Second operand has 29 states, 24 states have (on average 4.125) internal successors, (99), 26 states have internal predecessors, (99), 13 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2021-11-20 07:07:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:28,692 INFO L93 Difference]: Finished difference Result 393 states and 470 transitions. [2021-11-20 07:07:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 07:07:28,692 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 4.125) internal successors, (99), 26 states have internal predecessors, (99), 13 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) Word has length 221 [2021-11-20 07:07:28,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:28,695 INFO L225 Difference]: With dead ends: 393 [2021-11-20 07:07:28,695 INFO L226 Difference]: Without dead ends: 300 [2021-11-20 07:07:28,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=306, Invalid=2875, Unknown=11, NotChecked=0, Total=3192 [2021-11-20 07:07:28,698 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 153 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:28,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1446 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 801 Invalid, 0 Unknown, 635 Unchecked, 0.9s Time] [2021-11-20 07:07:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-20 07:07:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 282. [2021-11-20 07:07:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 194 states have (on average 1.175257731958763) internal successors, (228), 198 states have internal predecessors, (228), 49 states have call successors, (49), 35 states have call predecessors, (49), 38 states have return successors, (54), 48 states have call predecessors, (54), 48 states have call successors, (54) [2021-11-20 07:07:28,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 331 transitions. [2021-11-20 07:07:28,717 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 331 transitions. Word has length 221 [2021-11-20 07:07:28,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:28,718 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 331 transitions. [2021-11-20 07:07:28,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 4.125) internal successors, (99), 26 states have internal predecessors, (99), 13 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2021-11-20 07:07:28,718 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 331 transitions. [2021-11-20 07:07:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-20 07:07:28,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:28,720 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:28,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:28,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:28,926 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1831497991, now seen corresponding path program 1 times [2021-11-20 07:07:28,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:28,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715731083] [2021-11-20 07:07:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:28,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:28,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:28,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433382171] [2021-11-20 07:07:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:28,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:28,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:28,968 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:28,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:07:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 2789 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:07:29,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:30,958 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((aws_hash_iter_is_valid_~iter.offset Int) (aws_hash_iter_is_valid_~iter.base Int)) (not (= (select (select |c_#memory_$Pointer$.offset| aws_hash_iter_is_valid_~iter.base) aws_hash_iter_is_valid_~iter.offset) 0))) (exists ((aws_hash_iter_is_valid_~iter.offset Int) (aws_hash_iter_is_valid_~iter.base Int)) (not (= (select (select |c_#memory_$Pointer$.base| aws_hash_iter_is_valid_~iter.base) aws_hash_iter_is_valid_~iter.offset) 0)))) is different from true [2021-11-20 07:07:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-20 07:07:37,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:37,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:37,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715731083] [2021-11-20 07:07:37,489 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:37,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433382171] [2021-11-20 07:07:37,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433382171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:37,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:37,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:07:37,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795686995] [2021-11-20 07:07:37,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:37,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:07:37,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:37,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:07:37,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=22, Unknown=1, NotChecked=8, Total=42 [2021-11-20 07:07:37,492 INFO L87 Difference]: Start difference. First operand 282 states and 331 transitions. Second operand has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-20 07:07:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:37,668 INFO L93 Difference]: Finished difference Result 386 states and 468 transitions. [2021-11-20 07:07:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:07:37,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 221 [2021-11-20 07:07:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:37,672 INFO L225 Difference]: With dead ends: 386 [2021-11-20 07:07:37,672 INFO L226 Difference]: Without dead ends: 282 [2021-11-20 07:07:37,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=11, Invalid=22, Unknown=1, NotChecked=8, Total=42 [2021-11-20 07:07:37,673 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 0 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:37,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 894 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 309 Unchecked, 0.2s Time] [2021-11-20 07:07:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-20 07:07:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-11-20 07:07:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 194 states have (on average 1.1649484536082475) internal successors, (226), 198 states have internal predecessors, (226), 49 states have call successors, (49), 35 states have call predecessors, (49), 38 states have return successors, (54), 48 states have call predecessors, (54), 48 states have call successors, (54) [2021-11-20 07:07:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 329 transitions. [2021-11-20 07:07:37,693 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 329 transitions. Word has length 221 [2021-11-20 07:07:37,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:37,694 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 329 transitions. [2021-11-20 07:07:37,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-20 07:07:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 329 transitions. [2021-11-20 07:07:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-20 07:07:37,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:37,696 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:37,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:37,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:37,912 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:37,912 INFO L85 PathProgramCache]: Analyzing trace with hash -359144008, now seen corresponding path program 1 times [2021-11-20 07:07:37,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:37,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877672478] [2021-11-20 07:07:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:37,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:37,949 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:37,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537109468] [2021-11-20 07:07:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:37,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:37,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:37,950 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:37,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:07:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 2806 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-20 07:07:38,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:38,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:38,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-20 07:07:38,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:38,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-20 07:07:40,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,785 INFO L354 Elim1Store]: treesize reduction 199, result has 5.2 percent of original size [2021-11-20 07:07:40,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 134 [2021-11-20 07:07:40,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,825 INFO L354 Elim1Store]: treesize reduction 180, result has 5.8 percent of original size [2021-11-20 07:07:40,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 120 [2021-11-20 07:07:40,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,848 INFO L354 Elim1Store]: treesize reduction 99, result has 10.0 percent of original size [2021-11-20 07:07:40,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 107 [2021-11-20 07:07:40,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:40,872 INFO L354 Elim1Store]: treesize reduction 118, result has 8.5 percent of original size [2021-11-20 07:07:40,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 96 treesize of output 91 [2021-11-20 07:07:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 115 proven. 5 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-20 07:07:42,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:49,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:49,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877672478] [2021-11-20 07:07:49,565 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:49,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537109468] [2021-11-20 07:07:49,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537109468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:49,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:49,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-20 07:07:49,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791210321] [2021-11-20 07:07:49,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:49,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:07:49,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:49,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:07:49,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1307, Unknown=5, NotChecked=0, Total=1482 [2021-11-20 07:07:49,568 INFO L87 Difference]: Start difference. First operand 282 states and 329 transitions. Second operand has 30 states, 25 states have (on average 4.0) internal successors, (100), 26 states have internal predecessors, (100), 13 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2021-11-20 07:07:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:57,282 INFO L93 Difference]: Finished difference Result 404 states and 482 transitions. [2021-11-20 07:07:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 07:07:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 4.0) internal successors, (100), 26 states have internal predecessors, (100), 13 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) Word has length 222 [2021-11-20 07:07:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:57,286 INFO L225 Difference]: With dead ends: 404 [2021-11-20 07:07:57,286 INFO L226 Difference]: Without dead ends: 316 [2021-11-20 07:07:57,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 209 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=319, Invalid=2976, Unknown=11, NotChecked=0, Total=3306 [2021-11-20 07:07:57,288 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 180 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:57,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 1424 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 550 Invalid, 0 Unknown, 490 Unchecked, 0.7s Time] [2021-11-20 07:07:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-20 07:07:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 283. [2021-11-20 07:07:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 195 states have (on average 1.1641025641025642) internal successors, (227), 199 states have internal predecessors, (227), 49 states have call successors, (49), 35 states have call predecessors, (49), 38 states have return successors, (54), 48 states have call predecessors, (54), 48 states have call successors, (54) [2021-11-20 07:07:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 330 transitions. [2021-11-20 07:07:57,309 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 330 transitions. Word has length 222 [2021-11-20 07:07:57,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:57,310 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 330 transitions. [2021-11-20 07:07:57,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 4.0) internal successors, (100), 26 states have internal predecessors, (100), 13 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2021-11-20 07:07:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 330 transitions. [2021-11-20 07:07:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-20 07:07:57,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:57,312 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:57,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:57,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:57,529 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:57,529 INFO L85 PathProgramCache]: Analyzing trace with hash 578086683, now seen corresponding path program 1 times [2021-11-20 07:07:57,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:57,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474567160] [2021-11-20 07:07:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:57,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:57,570 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:07:57,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031602690] [2021-11-20 07:07:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:57,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:57,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:57,571 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:57,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:07:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:58,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 2810 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:07:58,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:58,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:58,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:58,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:58,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2021-11-20 07:07:58,830 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-11-20 07:07:58,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 45 [2021-11-20 07:07:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-11-20 07:07:58,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:59,411 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 51 treesize of output 43 [2021-11-20 07:07:59,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 74 treesize of output 66 [2021-11-20 07:07:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-11-20 07:07:59,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:59,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474567160] [2021-11-20 07:07:59,865 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:07:59,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031602690] [2021-11-20 07:07:59,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031602690] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:59,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:59,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16] total 22 [2021-11-20 07:07:59,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763678409] [2021-11-20 07:07:59,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:59,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:07:59,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:59,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:07:59,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:07:59,867 INFO L87 Difference]: Start difference. First operand 283 states and 330 transitions. Second operand has 8 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-20 07:08:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:00,384 INFO L93 Difference]: Finished difference Result 297 states and 345 transitions. [2021-11-20 07:08:00,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:08:00,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 223 [2021-11-20 07:08:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:00,386 INFO L225 Difference]: With dead ends: 297 [2021-11-20 07:08:00,387 INFO L226 Difference]: Without dead ends: 295 [2021-11-20 07:08:00,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-11-20 07:08:00,388 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 27 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:00,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1206 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:08:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-20 07:08:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 290. [2021-11-20 07:08:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 199 states have (on average 1.1608040201005025) internal successors, (231), 204 states have internal predecessors, (231), 50 states have call successors, (50), 36 states have call predecessors, (50), 40 states have return successors, (56), 49 states have call predecessors, (56), 49 states have call successors, (56) [2021-11-20 07:08:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 337 transitions. [2021-11-20 07:08:00,411 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 337 transitions. Word has length 223 [2021-11-20 07:08:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:00,411 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 337 transitions. [2021-11-20 07:08:00,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-20 07:08:00,412 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 337 transitions. [2021-11-20 07:08:00,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-20 07:08:00,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:00,414 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:00,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:00,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:00,631 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:00,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1437112506, now seen corresponding path program 1 times [2021-11-20 07:08:00,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:00,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597523820] [2021-11-20 07:08:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:00,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:00,674 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:00,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635490046] [2021-11-20 07:08:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:00,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:00,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:00,676 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:00,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 07:08:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:01,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 2805 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-20 07:08:01,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:01,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-20 07:08:01,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:01,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-20 07:08:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,926 INFO L354 Elim1Store]: treesize reduction 647, result has 11.2 percent of original size [2021-11-20 07:08:10,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 137 treesize of output 191 [2021-11-20 07:08:10,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:10,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:11,047 INFO L354 Elim1Store]: treesize reduction 390, result has 15.4 percent of original size [2021-11-20 07:08:11,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 167 treesize of output 221 [2021-11-20 07:08:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 84 proven. 6 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-20 07:08:13,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:18,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:18,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597523820] [2021-11-20 07:08:18,268 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:18,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635490046] [2021-11-20 07:08:18,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635490046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:18,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:08:18,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-20 07:08:18,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772831516] [2021-11-20 07:08:18,270 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:18,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:08:18,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:08:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1192, Unknown=5, NotChecked=0, Total=1332 [2021-11-20 07:08:18,271 INFO L87 Difference]: Start difference. First operand 290 states and 337 transitions. Second operand has 28 states, 23 states have (on average 4.304347826086956) internal successors, (99), 25 states have internal predecessors, (99), 13 states have call successors, (31), 7 states have call predecessors, (31), 8 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2021-11-20 07:08:23,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:23,611 INFO L93 Difference]: Finished difference Result 417 states and 498 transitions. [2021-11-20 07:08:23,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 07:08:23,612 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 4.304347826086956) internal successors, (99), 25 states have internal predecessors, (99), 13 states have call successors, (31), 7 states have call predecessors, (31), 8 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) Word has length 225 [2021-11-20 07:08:23,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:23,614 INFO L225 Difference]: With dead ends: 417 [2021-11-20 07:08:23,614 INFO L226 Difference]: Without dead ends: 336 [2021-11-20 07:08:23,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=389, Invalid=3145, Unknown=6, NotChecked=0, Total=3540 [2021-11-20 07:08:23,616 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 141 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 859 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:23,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1608 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1488 Invalid, 0 Unknown, 859 Unchecked, 1.3s Time] [2021-11-20 07:08:23,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-20 07:08:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 310. [2021-11-20 07:08:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 213 states have (on average 1.164319248826291) internal successors, (248), 218 states have internal predecessors, (248), 53 states have call successors, (53), 39 states have call predecessors, (53), 43 states have return successors, (61), 52 states have call predecessors, (61), 52 states have call successors, (61) [2021-11-20 07:08:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 362 transitions. [2021-11-20 07:08:23,641 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 362 transitions. Word has length 225 [2021-11-20 07:08:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:23,641 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 362 transitions. [2021-11-20 07:08:23,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 4.304347826086956) internal successors, (99), 25 states have internal predecessors, (99), 13 states have call successors, (31), 7 states have call predecessors, (31), 8 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2021-11-20 07:08:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 362 transitions. [2021-11-20 07:08:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-20 07:08:23,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:23,644 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:23,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:23,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:23,858 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash -247132154, now seen corresponding path program 1 times [2021-11-20 07:08:23,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:23,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539914557] [2021-11-20 07:08:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:23,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:23,898 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:23,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407551927] [2021-11-20 07:08:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:23,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:23,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:23,900 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:23,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 07:08:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 2814 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:08:24,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:24,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:24,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:24,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:24,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2021-11-20 07:08:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-20 07:08:25,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:25,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:25,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539914557] [2021-11-20 07:08:25,058 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:25,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407551927] [2021-11-20 07:08:25,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407551927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:25,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:25,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 07:08:25,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050272676] [2021-11-20 07:08:25,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:25,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:08:25,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:25,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:08:25,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:08:25,061 INFO L87 Difference]: Start difference. First operand 310 states and 362 transitions. Second operand has 10 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 6 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-20 07:08:25,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:25,234 INFO L93 Difference]: Finished difference Result 407 states and 481 transitions. [2021-11-20 07:08:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:08:25,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 6 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 226 [2021-11-20 07:08:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:25,237 INFO L225 Difference]: With dead ends: 407 [2021-11-20 07:08:25,237 INFO L226 Difference]: Without dead ends: 313 [2021-11-20 07:08:25,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:08:25,239 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 42 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:25,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1289 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 37 Invalid, 0 Unknown, 138 Unchecked, 0.1s Time] [2021-11-20 07:08:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-20 07:08:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2021-11-20 07:08:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 212 states have (on average 1.1603773584905661) internal successors, (246), 217 states have internal predecessors, (246), 53 states have call successors, (53), 39 states have call predecessors, (53), 43 states have return successors, (61), 52 states have call predecessors, (61), 52 states have call successors, (61) [2021-11-20 07:08:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 360 transitions. [2021-11-20 07:08:25,263 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 360 transitions. Word has length 226 [2021-11-20 07:08:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:25,264 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 360 transitions. [2021-11-20 07:08:25,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 6 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-20 07:08:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 360 transitions. [2021-11-20 07:08:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-20 07:08:25,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:25,266 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:25,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:25,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 07:08:25,478 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:25,478 INFO L85 PathProgramCache]: Analyzing trace with hash -327709568, now seen corresponding path program 1 times [2021-11-20 07:08:25,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:25,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526414520] [2021-11-20 07:08:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:25,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:25,519 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:25,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001658503] [2021-11-20 07:08:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:25,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:25,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:25,521 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:25,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 07:08:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:26,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2818 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:08:26,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-20 07:08:26,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-11-20 07:08:26,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:26,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526414520] [2021-11-20 07:08:26,936 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:26,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001658503] [2021-11-20 07:08:26,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001658503] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:26,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:08:26,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2021-11-20 07:08:26,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52911949] [2021-11-20 07:08:26,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:26,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:08:26,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:26,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:08:26,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:08:26,938 INFO L87 Difference]: Start difference. First operand 309 states and 360 transitions. Second operand has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2021-11-20 07:08:26,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:26,995 INFO L93 Difference]: Finished difference Result 323 states and 376 transitions. [2021-11-20 07:08:26,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:08:26,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 226 [2021-11-20 07:08:26,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:26,998 INFO L225 Difference]: With dead ends: 323 [2021-11-20 07:08:26,998 INFO L226 Difference]: Without dead ends: 321 [2021-11-20 07:08:26,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:08:26,999 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 4 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:26,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1225 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:08:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-20 07:08:27,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 310. [2021-11-20 07:08:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 213 states have (on average 1.15962441314554) internal successors, (247), 218 states have internal predecessors, (247), 53 states have call successors, (53), 39 states have call predecessors, (53), 43 states have return successors, (61), 52 states have call predecessors, (61), 52 states have call successors, (61) [2021-11-20 07:08:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 361 transitions. [2021-11-20 07:08:27,024 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 361 transitions. Word has length 226 [2021-11-20 07:08:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:27,024 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 361 transitions. [2021-11-20 07:08:27,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2021-11-20 07:08:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 361 transitions. [2021-11-20 07:08:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-20 07:08:27,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:27,027 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:27,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:27,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 07:08:27,242 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:27,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1137056194, now seen corresponding path program 1 times [2021-11-20 07:08:27,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:27,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907144625] [2021-11-20 07:08:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:27,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:27,276 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:27,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686732088] [2021-11-20 07:08:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:27,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:27,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:27,278 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:27,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 07:08:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:27,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 2821 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:08:27,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:27,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:27,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:27,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:27,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2021-11-20 07:08:28,318 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 07:08:28,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 16 [2021-11-20 07:08:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-20 07:08:28,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:28,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:28,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907144625] [2021-11-20 07:08:28,328 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:28,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686732088] [2021-11-20 07:08:28,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686732088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:28,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:28,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 07:08:28,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879535936] [2021-11-20 07:08:28,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:28,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:08:28,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:28,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:08:28,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:08:28,332 INFO L87 Difference]: Start difference. First operand 310 states and 361 transitions. Second operand has 11 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 6 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-20 07:08:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:28,571 INFO L93 Difference]: Finished difference Result 414 states and 487 transitions. [2021-11-20 07:08:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:08:28,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 6 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 226 [2021-11-20 07:08:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:28,573 INFO L225 Difference]: With dead ends: 414 [2021-11-20 07:08:28,573 INFO L226 Difference]: Without dead ends: 311 [2021-11-20 07:08:28,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:08:28,574 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 40 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:28,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 1620 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 195 Unchecked, 0.2s Time] [2021-11-20 07:08:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-20 07:08:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2021-11-20 07:08:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 210 states have (on average 1.1523809523809523) internal successors, (242), 215 states have internal predecessors, (242), 53 states have call successors, (53), 39 states have call predecessors, (53), 43 states have return successors, (61), 52 states have call predecessors, (61), 52 states have call successors, (61) [2021-11-20 07:08:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 356 transitions. [2021-11-20 07:08:28,599 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 356 transitions. Word has length 226 [2021-11-20 07:08:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:28,600 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 356 transitions. [2021-11-20 07:08:28,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 6 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-20 07:08:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 356 transitions. [2021-11-20 07:08:28,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-20 07:08:28,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:28,602 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:28,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:28,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:28,826 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:28,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:28,826 INFO L85 PathProgramCache]: Analyzing trace with hash -904891895, now seen corresponding path program 1 times [2021-11-20 07:08:28,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:28,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758667703] [2021-11-20 07:08:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:28,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:28,858 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:28,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098686558] [2021-11-20 07:08:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:28,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:28,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:28,860 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:28,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 07:08:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:29,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2813 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:08:29,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-20 07:08:29,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:29,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:29,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758667703] [2021-11-20 07:08:29,692 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:29,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098686558] [2021-11-20 07:08:29,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098686558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:29,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:29,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:08:29,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374963961] [2021-11-20 07:08:29,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:29,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:08:29,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:29,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:08:29,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:08:29,694 INFO L87 Difference]: Start difference. First operand 307 states and 356 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-20 07:08:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:29,724 INFO L93 Difference]: Finished difference Result 407 states and 484 transitions. [2021-11-20 07:08:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:08:29,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 227 [2021-11-20 07:08:29,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:29,736 INFO L225 Difference]: With dead ends: 407 [2021-11-20 07:08:29,736 INFO L226 Difference]: Without dead ends: 282 [2021-11-20 07:08:29,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 224 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 07:08:29,739 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 1 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:29,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 596 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:08:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-20 07:08:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2021-11-20 07:08:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 191 states have (on average 1.1413612565445026) internal successors, (218), 195 states have internal predecessors, (218), 49 states have call successors, (49), 35 states have call predecessors, (49), 39 states have return successors, (55), 49 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-20 07:08:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 322 transitions. [2021-11-20 07:08:29,766 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 322 transitions. Word has length 227 [2021-11-20 07:08:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:29,767 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 322 transitions. [2021-11-20 07:08:29,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-20 07:08:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 322 transitions. [2021-11-20 07:08:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-20 07:08:29,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:29,769 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:29,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:29,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:29,988 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1338459295, now seen corresponding path program 1 times [2021-11-20 07:08:29,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:29,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858829906] [2021-11-20 07:08:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:29,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:30,029 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:30,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795600529] [2021-11-20 07:08:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:30,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:30,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:30,031 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:30,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 07:08:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:30,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 2817 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:08:30,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-20 07:08:30,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:30,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858829906] [2021-11-20 07:08:30,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795600529] [2021-11-20 07:08:30,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795600529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:30,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:30,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:08:30,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391564309] [2021-11-20 07:08:30,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:30,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:08:30,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:30,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:08:30,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:08:30,817 INFO L87 Difference]: Start difference. First operand 280 states and 322 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-20 07:08:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:30,841 INFO L93 Difference]: Finished difference Result 368 states and 436 transitions. [2021-11-20 07:08:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:08:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 1 states have call successors, (27) Word has length 226 [2021-11-20 07:08:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:30,843 INFO L225 Difference]: With dead ends: 368 [2021-11-20 07:08:30,843 INFO L226 Difference]: Without dead ends: 272 [2021-11-20 07:08:30,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:08:30,846 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 0 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:30,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 799 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:08:30,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-20 07:08:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-11-20 07:08:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 185 states have (on average 1.135135135135135) internal successors, (210), 188 states have internal predecessors, (210), 49 states have call successors, (49), 35 states have call predecessors, (49), 37 states have return successors, (53), 48 states have call predecessors, (53), 48 states have call successors, (53) [2021-11-20 07:08:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 312 transitions. [2021-11-20 07:08:30,867 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 312 transitions. Word has length 226 [2021-11-20 07:08:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:30,868 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 312 transitions. [2021-11-20 07:08:30,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-20 07:08:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 312 transitions. [2021-11-20 07:08:30,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-20 07:08:30,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:30,870 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:30,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:31,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 07:08:31,090 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:31,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1959781448, now seen corresponding path program 1 times [2021-11-20 07:08:31,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:31,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428003551] [2021-11-20 07:08:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:31,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:31,122 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:31,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728871392] [2021-11-20 07:08:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:31,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:31,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:31,124 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:31,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 07:08:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:32,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 2859 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:08:32,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-20 07:08:32,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:32,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:32,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428003551] [2021-11-20 07:08:32,821 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:32,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728871392] [2021-11-20 07:08:32,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728871392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:32,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:08:32,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:08:32,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348823250] [2021-11-20 07:08:32,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:32,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:08:32,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:08:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:08:32,822 INFO L87 Difference]: Start difference. First operand 272 states and 312 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-20 07:08:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:32,846 INFO L93 Difference]: Finished difference Result 439 states and 509 transitions. [2021-11-20 07:08:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:08:32,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 236 [2021-11-20 07:08:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:32,848 INFO L225 Difference]: With dead ends: 439 [2021-11-20 07:08:32,849 INFO L226 Difference]: Without dead ends: 273 [2021-11-20 07:08:32,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 233 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 07:08:32,851 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 2 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:32,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 595 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:08:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-20 07:08:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-11-20 07:08:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 186 states have (on average 1.1344086021505377) internal successors, (211), 189 states have internal predecessors, (211), 49 states have call successors, (49), 35 states have call predecessors, (49), 37 states have return successors, (53), 48 states have call predecessors, (53), 48 states have call successors, (53) [2021-11-20 07:08:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 313 transitions. [2021-11-20 07:08:32,873 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 313 transitions. Word has length 236 [2021-11-20 07:08:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:32,874 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 313 transitions. [2021-11-20 07:08:32,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-20 07:08:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 313 transitions. [2021-11-20 07:08:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-20 07:08:32,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:32,876 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:32,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:33,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 07:08:33,090 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:33,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:33,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1033887265, now seen corresponding path program 1 times [2021-11-20 07:08:33,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:33,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407232856] [2021-11-20 07:08:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:33,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:33,125 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:33,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758073557] [2021-11-20 07:08:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:33,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:33,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:33,127 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:33,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 07:08:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:36,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 2866 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:08:36,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 134 proven. 1 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-20 07:08:36,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-20 07:08:37,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:37,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407232856] [2021-11-20 07:08:37,482 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:37,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758073557] [2021-11-20 07:08:37,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758073557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:08:37,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:08:37,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 07:08:37,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742995999] [2021-11-20 07:08:37,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:37,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:08:37,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:37,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:08:37,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:08:37,484 INFO L87 Difference]: Start difference. First operand 273 states and 313 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 07:08:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:37,611 INFO L93 Difference]: Finished difference Result 444 states and 516 transitions. [2021-11-20 07:08:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:08:37,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 237 [2021-11-20 07:08:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:37,614 INFO L225 Difference]: With dead ends: 444 [2021-11-20 07:08:37,614 INFO L226 Difference]: Without dead ends: 276 [2021-11-20 07:08:37,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:08:37,622 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 8 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:37,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 985 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:08:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-20 07:08:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2021-11-20 07:08:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 189 states have (on average 1.1322751322751323) internal successors, (214), 192 states have internal predecessors, (214), 49 states have call successors, (49), 35 states have call predecessors, (49), 37 states have return successors, (53), 48 states have call predecessors, (53), 48 states have call successors, (53) [2021-11-20 07:08:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 316 transitions. [2021-11-20 07:08:37,644 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 316 transitions. Word has length 237 [2021-11-20 07:08:37,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:37,645 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 316 transitions. [2021-11-20 07:08:37,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 07:08:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 316 transitions. [2021-11-20 07:08:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-20 07:08:37,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:37,647 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:37,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:37,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 07:08:37,862 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash -636228232, now seen corresponding path program 2 times [2021-11-20 07:08:37,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:37,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946054898] [2021-11-20 07:08:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:37,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:37,901 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:37,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620995632] [2021-11-20 07:08:37,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:08:37,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:37,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:37,903 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:37,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 07:08:41,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:08:41,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:08:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:08:41,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-20 07:08:42,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-20 07:08:42,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:42,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946054898] [2021-11-20 07:08:42,768 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:42,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620995632] [2021-11-20 07:08:42,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620995632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:08:42,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:08:42,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 07:08:42,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377754114] [2021-11-20 07:08:42,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:42,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:08:42,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:42,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:08:42,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:08:42,770 INFO L87 Difference]: Start difference. First operand 276 states and 316 transitions. Second operand has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 07:08:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:43,227 INFO L93 Difference]: Finished difference Result 450 states and 525 transitions. [2021-11-20 07:08:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:08:43,228 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 240 [2021-11-20 07:08:43,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:43,230 INFO L225 Difference]: With dead ends: 450 [2021-11-20 07:08:43,231 INFO L226 Difference]: Without dead ends: 282 [2021-11-20 07:08:43,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:08:43,232 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 30 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:43,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1191 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:08:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-20 07:08:43,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-11-20 07:08:43,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 195 states have (on average 1.1282051282051282) internal successors, (220), 198 states have internal predecessors, (220), 49 states have call successors, (49), 35 states have call predecessors, (49), 37 states have return successors, (53), 48 states have call predecessors, (53), 48 states have call successors, (53) [2021-11-20 07:08:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 322 transitions. [2021-11-20 07:08:43,256 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 322 transitions. Word has length 240 [2021-11-20 07:08:43,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:43,257 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 322 transitions. [2021-11-20 07:08:43,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-20 07:08:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 322 transitions. [2021-11-20 07:08:43,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-20 07:08:43,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:43,259 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:43,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:43,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:43,478 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:43,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1844001768, now seen corresponding path program 3 times [2021-11-20 07:08:43,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:43,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476336728] [2021-11-20 07:08:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:43,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:43,516 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:43,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316748635] [2021-11-20 07:08:43,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:08:43,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:43,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:43,518 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:43,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 07:09:23,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 07:09:23,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:09:23,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 2639 conjuncts, 202 conjunts are in the unsatisfiable core [2021-11-20 07:09:23,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:23,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 36 [2021-11-20 07:09:23,801 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 39 treesize of output 35 [2021-11-20 07:09:23,824 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 07:09:26,608 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 106 treesize of output 78 [2021-11-20 07:09:26,628 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-11-20 07:09:26,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 57 [2021-11-20 07:09:26,632 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 48 treesize of output 40 [2021-11-20 07:09:26,851 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 13 treesize of output 9 [2021-11-20 07:09:26,999 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 17 treesize of output 9 [2021-11-20 07:09:27,140 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 13 treesize of output 9 [2021-11-20 07:09:28,099 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 67 treesize of output 47 [2021-11-20 07:09:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 154 proven. 56 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 07:09:28,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:09:30,259 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 34 treesize of output 30 [2021-11-20 07:09:30,515 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 34 treesize of output 30 [2021-11-20 07:09:31,219 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 38 treesize of output 34 [2021-11-20 07:09:34,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:34,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476336728] [2021-11-20 07:09:34,222 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:09:34,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316748635] [2021-11-20 07:09:34,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316748635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:09:34,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:09:34,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-20 07:09:34,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235382943] [2021-11-20 07:09:34,223 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:09:34,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 07:09:34,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 07:09:34,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3233, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 07:09:34,225 INFO L87 Difference]: Start difference. First operand 282 states and 322 transitions. Second operand has 35 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 14 states have call successors, (35), 5 states have call predecessors, (35), 13 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2021-11-20 07:09:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:37,492 INFO L93 Difference]: Finished difference Result 627 states and 735 transitions. [2021-11-20 07:09:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 07:09:37,493 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 14 states have call successors, (35), 5 states have call predecessors, (35), 13 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) Word has length 246 [2021-11-20 07:09:37,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:37,496 INFO L225 Difference]: With dead ends: 627 [2021-11-20 07:09:37,496 INFO L226 Difference]: Without dead ends: 437 [2021-11-20 07:09:37,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 356 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=362, Invalid=6118, Unknown=0, NotChecked=0, Total=6480 [2021-11-20 07:09:37,500 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 177 mSDsluCounter, 3916 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 4184 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 632 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:37,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 4184 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1242 Invalid, 0 Unknown, 632 Unchecked, 1.4s Time] [2021-11-20 07:09:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-11-20 07:09:37,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 427. [2021-11-20 07:09:37,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 298 states have (on average 1.157718120805369) internal successors, (345), 304 states have internal predecessors, (345), 74 states have call successors, (74), 48 states have call predecessors, (74), 54 states have return successors, (85), 74 states have call predecessors, (85), 72 states have call successors, (85) [2021-11-20 07:09:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 504 transitions. [2021-11-20 07:09:37,542 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 504 transitions. Word has length 246 [2021-11-20 07:09:37,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:37,543 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 504 transitions. [2021-11-20 07:09:37,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 14 states have call successors, (35), 5 states have call predecessors, (35), 13 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2021-11-20 07:09:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 504 transitions. [2021-11-20 07:09:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-20 07:09:37,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:37,545 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:37,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:37,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 07:09:37,758 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:37,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:37,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1540725730, now seen corresponding path program 1 times [2021-11-20 07:09:37,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:37,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797468955] [2021-11-20 07:09:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:37,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:37,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:09:37,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846579082] [2021-11-20 07:09:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:37,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:37,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:37,788 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:37,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 07:10:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:00,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 2950 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 07:10:00,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 142 proven. 55 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-11-20 07:10:01,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-20 07:10:02,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:02,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797468955] [2021-11-20 07:10:02,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:02,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846579082] [2021-11-20 07:10:02,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846579082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:02,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:02,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-20 07:10:02,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493094085] [2021-11-20 07:10:02,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:02,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:10:02,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:10:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:10:02,293 INFO L87 Difference]: Start difference. First operand 427 states and 504 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-20 07:10:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:08,867 INFO L93 Difference]: Finished difference Result 724 states and 887 transitions. [2021-11-20 07:10:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:10:08,868 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 253 [2021-11-20 07:10:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:08,871 INFO L225 Difference]: With dead ends: 724 [2021-11-20 07:10:08,871 INFO L226 Difference]: Without dead ends: 451 [2021-11-20 07:10:08,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 07:10:08,873 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 83 mSDsluCounter, 2378 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:08,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 2577 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:10:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-20 07:10:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2021-11-20 07:10:08,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 322 states have (on average 1.1459627329192548) internal successors, (369), 328 states have internal predecessors, (369), 74 states have call successors, (74), 48 states have call predecessors, (74), 54 states have return successors, (85), 74 states have call predecessors, (85), 72 states have call successors, (85) [2021-11-20 07:10:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 528 transitions. [2021-11-20 07:10:08,917 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 528 transitions. Word has length 253 [2021-11-20 07:10:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:08,917 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 528 transitions. [2021-11-20 07:10:08,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-20 07:10:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 528 transitions. [2021-11-20 07:10:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-20 07:10:08,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:08,921 INFO L514 BasicCegarLoop]: trace histogram [22, 9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:09,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:09,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-20 07:10:09,134 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:09,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1605803050, now seen corresponding path program 1 times [2021-11-20 07:10:09,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:09,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424375056] [2021-11-20 07:10:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:09,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:09,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:09,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232381373] [2021-11-20 07:10:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:09,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:09,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:09,172 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:09,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 07:10:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 3029 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:10:09,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2021-11-20 07:10:10,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:10:10,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:10,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424375056] [2021-11-20 07:10:10,095 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:10,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232381373] [2021-11-20 07:10:10,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232381373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:10:10,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:10:10,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:10:10,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166434681] [2021-11-20 07:10:10,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:10,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:10:10,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:10,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:10:10,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:10:10,098 INFO L87 Difference]: Start difference. First operand 451 states and 528 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-20 07:10:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:10,149 INFO L93 Difference]: Finished difference Result 743 states and 855 transitions. [2021-11-20 07:10:10,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:10:10,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) Word has length 264 [2021-11-20 07:10:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:10,152 INFO L225 Difference]: With dead ends: 743 [2021-11-20 07:10:10,152 INFO L226 Difference]: Without dead ends: 296 [2021-11-20 07:10:10,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:10:10,154 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 2 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:10,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1193 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:10:10,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-20 07:10:10,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-11-20 07:10:10,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 209 states have (on average 1.1100478468899522) internal successors, (232), 212 states have internal predecessors, (232), 48 states have call successors, (48), 36 states have call predecessors, (48), 38 states have return successors, (52), 47 states have call predecessors, (52), 47 states have call successors, (52) [2021-11-20 07:10:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 332 transitions. [2021-11-20 07:10:10,182 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 332 transitions. Word has length 264 [2021-11-20 07:10:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:10,182 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 332 transitions. [2021-11-20 07:10:10,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-20 07:10:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 332 transitions. [2021-11-20 07:10:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-20 07:10:10,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:10,185 INFO L514 BasicCegarLoop]: trace histogram [22, 10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:10,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:10,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-20 07:10:10,405 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash -17595870, now seen corresponding path program 2 times [2021-11-20 07:10:10,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:10,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896126046] [2021-11-20 07:10:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:10,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:10,440 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:10,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190678273] [2021-11-20 07:10:10,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:10:10,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:10,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:10,442 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:10,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 07:10:25,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:10:25,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:10:25,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 3034 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 07:10:25,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 142 proven. 253 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-11-20 07:10:26,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-20 07:10:28,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:28,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896126046] [2021-11-20 07:10:28,084 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:28,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190678273] [2021-11-20 07:10:28,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190678273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:28,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:28,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-20 07:10:28,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330153924] [2021-11-20 07:10:28,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:28,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 07:10:28,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:28,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 07:10:28,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 07:10:28,087 INFO L87 Difference]: Start difference. First operand 296 states and 332 transitions. Second operand has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-20 07:10:38,858 WARN L227 SmtUtils]: Spent 9.72s on a formula simplification. DAG size of input: 121 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:10:56,463 WARN L227 SmtUtils]: Spent 15.05s on a formula simplification. DAG size of input: 116 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:11:03,878 WARN L227 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 111 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:11:15,310 WARN L227 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 106 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:11:41,689 WARN L227 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 96 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:11:58,668 WARN L227 SmtUtils]: Spent 10.44s on a formula simplification. DAG size of input: 91 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:13:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:07,850 INFO L93 Difference]: Finished difference Result 488 states and 577 transitions. [2021-11-20 07:13:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-20 07:13:07,851 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 265 [2021-11-20 07:13:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:07,853 INFO L225 Difference]: With dead ends: 488 [2021-11-20 07:13:07,854 INFO L226 Difference]: Without dead ends: 320 [2021-11-20 07:13:07,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 160.6s TimeCoverageRelationStatistics Valid=1817, Invalid=3433, Unknown=6, NotChecked=0, Total=5256 [2021-11-20 07:13:07,856 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 319 mSDsluCounter, 4373 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 4564 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:07,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 4564 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:13:07,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-20 07:13:07,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2021-11-20 07:13:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 233 states have (on average 1.0987124463519313) internal successors, (256), 236 states have internal predecessors, (256), 48 states have call successors, (48), 36 states have call predecessors, (48), 38 states have return successors, (52), 47 states have call predecessors, (52), 47 states have call successors, (52) [2021-11-20 07:13:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 356 transitions. [2021-11-20 07:13:07,889 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 356 transitions. Word has length 265 [2021-11-20 07:13:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:07,890 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 356 transitions. [2021-11-20 07:13:07,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 states have internal predecessors, (153), 2 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-20 07:13:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 356 transitions. [2021-11-20 07:13:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-20 07:13:07,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:07,893 INFO L514 BasicCegarLoop]: trace histogram [46, 10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:13:07,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:08,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:08,108 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:13:08,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash 76099234, now seen corresponding path program 3 times [2021-11-20 07:13:08,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:13:08,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379112981] [2021-11-20 07:13:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:08,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:13:08,171 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:13:08,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795172750] [2021-11-20 07:13:08,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:13:08,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:13:08,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:13:08,173 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:13:08,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8ab954-e478-47fd-aa5a-41fbeac5ceb9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process